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Siemens Fusesaver and Remote Control Unit 3AD8Medium-Voltage Equipment

Catalog HG 11.43 ⋅ Edition 2017

http://www.siemens.com/fusesaver

2 Siemens Fusesaver and Remote Control Unit 3AD8 · Siemens HG 11.43 · 2017

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3Siemens Fusesaver and Remote Control Unit 3AD8 · Siemens HG 11.43 · 2017

Description 5Fusesaver 6The Fusesaver system 8Communications module 11Siemens Connect software 12Protection functions and modes 14Standards and ambient conditions 16Product range overview and scope of delivery 17 Remote Control Unit 19RCU principle 20The RCU system 21Communications interface and protocol 24RCU Connect and RCU Probe software 24Standards, ambient conditions, scope of delivery 25

Rural network challenges 4

Product Selection 27Ordering data and configuration example 28Selection of Fusesaver 29Selection of Remote Control Unit 30Selection of additional equipment 31Selection of accessories and spare parts 32

Technical Data 33Electrical data, dimensions and weights 34Dimension drawings 35

Annex 37Benefits 38Inquiry form 39Configuration aid Foldout page

Contents Page

Siemens Fusesaver and Remote Control Unit 3AD8 Medium-Voltage Equipment Catalog HG 11.43 · 2017

Replacing: Catalog HG 11.43 · 2016

siemens.com/fusesaver

Contents

The products and systems described in this catalog are manufactured and sold according to a certified management system (acc. to ISO 9001, ISO 14001 and BS OHSAS 18001).

http://www.siemens.com/fusesaver

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Description

Circuit-breaker

Fusesaver

Item

Substation

Fuse holder and partner fuse

Feeder line

Lateral line (also referred to as T-off or spur line)

RecloserR

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Rural network challenges

*) also referred to as T-offs or spur lines

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In most rural network configurations, the feeder is protected by a circuit-breaker or recloser. Lateral lines (also referred to as T-offs or spur lines) are usually protected by fuses.

As a fuse is unable to distinguish between temporary and permanent faults, it blows on ALL faults, causing downstream customers to lose power and requiring a line crew to replace the fuse.

In rural networks it may take hours for the line crew to drive to site, patrol the line and reconnect supply. This leads to un-necessary high operating costs for the utility.

Furthermore, downstream users are left without power for extended periods of time potentially resulting in financial penalties to the utility.

Since typically 80 percent of a rural network’s faults are transient, 80 percent of its fuses are blown unnecessarily.

Some utilities are moving towards de-fusing their rural net-works to avoid this problem and to address fire start risks also associated with fuses. They then depend upon the upstream recloser to clear transient faults on the lateral line.

This approach at best greatly increases the number of cus-tomers affected by a transient fault. However, it is known that the recloser may not have adequate protection reach, resulting in undetected persistent faults that can cause a danger to the community.

Another historic way of dealing with lateral line* faults is with the help of drop-out sectionalizers. This device needs an upstream recloser or circuit-breaker to trip on a fault current. This gives stress to the downstream network for multiple times until the sectionalizer finally drops out.

All above discussed scenarios can be improved by using the Siemens Fusesaver.

Due to the low customer numbers on rural lateral lines* it was often difficult for the utility to find a cost-effective solution to this problem… until now!

The network example below shows a Fusesaver in line with a partner fuse and two Fusesavers without a fuse. All Fusesaver devices have the same hardware, but different customer-configurable protection sequences. For a detailed description, please refer to the following sections of this document.

Fusesaver 5 Description

General 6

The Fusesaver system Design of the switch unit 8Self powering 8Vacuum interrupter 9Magnetic actuator 9External lever 9Fusesaver mounting options 10Line mounting 10Cross-arm or pole mounting 10Rating plate 10

Communications moduleWireless communications 11Battery 11LED 11Tripping and closing 11

Siemens Connect software Configuration 12Operation 12Event data 13Load profile data 13Reliability data 13

Protection functions Fusesaver protection overview 14Configurable dead time 15Three-phase lockout protection 15Pseudo three-phase trip protection 15Pseudo three-phase trip and three-phase lockout 15

Protection modes 16 Standards 16Ambient conditions 16Altitude correction factor 16Number of operating cycles 16Product range overview 17Scope of delivery 17

Contents Page

DescriptionContents


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Siemens Fusesaver TM *) 3AD8

*) TM = Trade Mark

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DescriptionGeneral

Siemens Fusesaver 3AD8

Siemens Fusesaver [O-1s-C]* with partner fuse

Fusesaver, the world’s fastest medium-voltage (MV) out-door vacuum circuit-breaker, is the most cost-effective solution for optimizing reliability while minimizing oper-ating costs of rural overhead MV networks. It is capable of almost completely removing the impacts of temporary faults on lateral lines.

Fusesaver is a new class of intelligent, compact and low-cost single-phase circuit-breaker. The Fusesaver complies with the relevant parts of IEC 62271-100.

With on-board microprocessor control and wireless connectiv-ity, Fusesaver has configurable protection, multi-phase opera-tion functions, on-board event history, load profiling and can be integrated into a SCADA system for remote control. It is an electrically floating device that hangs directly from the MV line. With no earth connection, it has no electrical stresses on its insulators, resulting in long life. It self-powers by harvest-

Whilst the fuse protects the lateral line, the Fusesaver protects the fuse from transient faults.

ing and storing energy from the line current. Fault detection is achieved with a cutting-edge, high-speed protection algorithm.

The Fusesaver is designed to either:• Be installed in series with the fuse. When it senses a fault

current, it will open before the fuse can melt, and stay open for a pre-determined time (dead time) to clear a transient fault. Then, the Fusesaver closes again reconnect-ing supply. This is the traditional Open-Close Fusesaver approach

• Replace the fuse altogether. When installed in this manner the Fusesaver can perform the same Open-Close function-ality as above to clear a transient fault but can also perform a second “Open” operation to clear a permanent fault.

For highest flexibility, it is our customers’ choice, when configuring the Fusesaver, to select between the O-C and the O-CO operating cycle.

Performance with temporary faults Performance with permanent faults

In this case, the fault disappears during the Fusesaver’s dead time. After closing, the power supply is restored. The fuse did not operate, and the Fusesaver is ready for the next fault. Only the customers on the affected lateral experience an interruption in power during the Fusesaver’s dead time, while all other customers on the feeder, including nearby laterals, do not even notice its operation.

When the Fusesaver closes, the fault is still present, resulting in an immediate fault current. The Fusesaver will not operate again and allow the fault current to blow the fuse. Loss of power is unavoidable for customers on this lateral, while all other customers receive an uninterrupted power supply. The Siemens Fusesaver restricts blown fuses on lateral lines to unavoidable cases of permanent faults.

*Highest customer flexibility: One hardware platform, two selectable operating sequences and multiple other policy file settings


1.1

DescriptionGeneral


Siemens Fusesaver [O-2s-CO]* without partner fuse

Many utilities worldwide have chosen to remove fuses from their overhead network entirely to address reliability, opera-tor safety and fire prevention concerns. The O-CO Fusesaver provides a new solution to improve rural networks’ reliability. The fuse is no longer necessary to clear a permanent fault.

This Open-Close-Open (O-CO) operating sequence is enabled by a next generation electronics platform.

The Fusesaver O-CO is a primary protection device, and protection is operational even when the line is unener-gized. This is supported by a communications module with on-board battery fitted to each Fusesaver O-CO.

As part of this overall new electronics platform, a range of new features and performance enhancements have been implemented as follows:

• The Fusesaver O-CO maintains two fully configurable pro-tection curves that can be applied to any protection trip

• The user now has much greater configurability of protec-tion functionality depending upon status of the external lever. Not only can the protection curve be changed, but also the protection sequence and the three-phase lockout and pseudo three-phase trip functions can be enabled or disabled. The protection sequence can be configured to OFF, single shot or O-CO and this can be changed via SCADA control, if an RCU is installed

• Thermal overload protection provides a self protection against excessive load current

• Fault passage indication functionality: When a Fusesaver trips to lock-out on a permanent fault, the LED of the com-munications module will flash every 3 s for a user-defined period of time of up to 7 hours.

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The Fusesaver O-CO is the ultimate Fusesaver, as the fuse is not required at all.

Performance with temporary faults Performance with permanent faults

In this case, the fault disappears during the Fusesaver’s dead time. After closing, the power supply is restored and the Fusesaver is ready for the next fault. Only the customers on the affected lateral experience an interrup-tion in power during the Fusesaver’s dead time, while all other customers on the feeder, including nearby lateral, do not even notice its operation.

When the Fusesaver closes, the fault is still present, re-sulting in an immediate fault current. The Fusesaver will operate again and stay open. Loss of power is unavoid-able for customers on this lateral, while all other custom-ers receive an uninterrupted power supply.

*Highest customer flexibility: One hardware platform, two selectable operating sequences and multiple other policy file settings


1.1

The Fusesaver system

In order to minimize installation and operating costs, the Siemens Fusesaver was developed as part of an integrated system of tools and accessories. All system components work together, which permits easy installation, fast commission-ing, and reliable operation in all conditions.

A typical Fusesaver installation includes the following items for each phase:

1. Fusesaver 2. Line clamping assembly 3. Bird guard 4. Communications module

Configuration of the unit is achieved through a wireless connection to a PC application called Siemens Connect.

Design of the switch unit

The Fusesaver is a fully integrated unit consisting of a vacuum interrupter driven by a magnetic actuator. On-board current transformers both power the Fusesaver and provide current measurement inputs into the built-in electronics control and protection module.

The external insulation is high grade silicone rubber and the mechanism housing marine grade aluminium for long out-door life.

Self powering

The Fusesaver is capable of self powering from the very low line currents found on rural overhead networks. The Fusesaver is manufactured in three models with the low range model requiring as little as 0.15 A line current to power the unit.R-

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1 Dead-end2 Fault detection current

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4 Bird guard (optional)5 Power current transformer6 Magnetic actuator7 Electronic module

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3 Bird guard4 Communications module

A typical Fusesaver installation includes the following items for each phase:

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DescriptionThe Fusesaver system

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1.1Vacuum interrupter

The Fusesaver relies upon Siemens well-established vacuum interrupter technology. The vacuum interrupter utilized in the Fusesaver is a specific innovation by Siemens to facilitate the half-cycle fault interruption required to be able to suc-cessfully save fuses.

Magnetic actuator

The magnetic actuator is another specific innovation by Siemens developed for the Fusesaver to also provide the half-cycle interruption capability. The magnetic actuator can unlatch in less than 2 ms and have the vacuum interrupter contacts fully open within another 4 ms.

The magnetic actuator is directly coupled to the position indi cator which is visible from ground level.

External lever

The Fusesaver is fitted with an external lever that allows an operator to change the protection and other operational parameters of the Fusesaver. When the lever is in the UP position the LEVER UP settings are in force.

If a line crew is required to work downstream of the Fusesaver, they can pull DOWN the external lever to change the func-tion of the Fusesaver according to the LEVER DOWN settings. Typically these alternative settings would be to either turn the protection OFF, or to implement a fast single-trip protec-tion mode with half-cycle protection.

Fusesaver position indicator

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DescriptionVacuum interrupter, magnetic actuator, external lever


1.1

Fusesaver mounting options

Fusesaver is an electrically floating device so requires no earthing. This product architecture allows for a number of different mounting options. In all cases the Fusesaver has been designed to be mounted horizontally.

Line mounting

The preferred method for mounting of the Fusesaver is to hang it directly from the line using the line clamping as-sembly. The line clamping assembly connects directly to the dead-end of the conductor and ensures that the Fusesaver is hung at its center of mass. A cable connects the Fusesaver terminals to the conductor.

Cross-arm or pole mounting

For locations where it is impractical to line mount the Fusesaver, an alternative is to use a cross-arm or the pole. A composite station post insulator with special end brackets is used to support the Fusesaver.

Rating plate

Note:For any request regarding spare parts, subsequent deliveries, etc. the following details are necessary:

– Type designation – Serial No. – Year of manufacture

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Line mounting

Cross-arm mounting

Pole mounting

Rating plate

DescriptionFusesaver mounting options, line mounting, cross-arm or pole mounting, rating plate


1.1

Communications module

The communications module plugs into a three-pin con-nector on the bottom of the Fusesaver and provides a short range wireless link between the Fusesaver and other devices. It also has a built-in battery. The module allows the crew to interface with Siemens Fusesaver from ground level using a laptop. It can be installed from the ground using a live-line stick equipped with a special communica-tions module attachment tool.

The communications module has multiple purposes. It can be: Installed temporarily:• At time of commissioning to allow the Fusesaver to be

configured and tested• During service to allow Fusesaver to be manually operated,

line data accessed and event logs downloaded.Installed permanently:• To allow Open-Close-Open functionality• To allow three-phase functionality• To improve the Fusesaver performance by reducing the

capacitor recharge time and increasing the accuracy of the event log

• To enable the above functions and also to connect to a Remote Control Unit (RCU) thereby integrating the Fusesaver into the user’s SCADA network.

Wireless communicationsThe communications module includes an intelligent short range wireless transceiver which enables encrypted communication to the Fusesaver from ground level. The wireless link uses the public 2.4 GHz band with a proprietary protocol. The effective range of the communications module depends on the installation and site conditions. A typical range is 20 m (60 ft) in line of sight.

BatteryThe communications module is normally powered by energy extracted from line current by the Fusesaver. The commu-nications module includes a battery to provide power to run the communications module radio and to manually operate the Fusesaver when the line current is off.

LEDThe communications module has a transparent window on the underside behind which a high intensity LED is localized. When illuminated, this LED is visible from the ground in day-light. This LED is used to assist the operator during commis-sioning and when manually operating the Fusesaver.

Tripping and closingThe communications module is fitted with external actuators that may be used to trip or close the Fusesaver. Using the wireless communications between the Fusesavers it is also possible to synchronously trip and close Fusesavers.

Communications module – carry case kit

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Communications module

DescriptionCommunications module

Fusesaver + communications module communicates with USB-antenna


1.1

Siemens Connect software

Communication with the Fusesaver is performed using a special Fusesaver PC application, a USB radio antenna, and a short range (approximately 20 meters) radio integrated in the communications module.

Configuration

The Fusesavers are configured wirelessly through the Siemens Connect PC application. All the user needs to do is to identify the Fusesavers to be configured together as a site, load the policy file that includes the protection settings defined by the utility and tell the Fusesaver the type and rating of its partner fuse. The entire process is completed within a few minutes.

OperationWhen on-site, the line crew can access the live data in the Fusesaver using the Siemens Connect PC application. This live data includes:

• Details of the protection settings in the Fusesaver• The Fusesaver open/closed status• The load current in each Fusesaver• The protection mode that is active• Whether the protection is armed• Details on the most recent fault• Details on the Fusesaver and battery life• Status of the communications between Fusesavers

(peer communications).

The operators also have the ability to trip and close the Fusesaver using controls from the PC.

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DescriptionSiemens Connect software


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Event dataFusesaver stores a time-stamped history of the major events in its on-board memory. The event record contains a history of up to 3,000 events including protection operations, fault data, outage durations, and configuration changes.

The event data can be viewed using the Siemens Connect PC application. Data can be filtered and exported as required.

Load profile dataThe Fusesaver can collect data on the current flowing in each phase of an installation. The Fusesaver can report the following data for each 24 hour period:

• The minimum current (with time stamp)

• The maximum peak current (with time stamp)

• The average daily current.

Each time an event log is retrieved from Fusesaver the load profile data is stored onto the PC. The user can then display the data using the Siemens Connect tool in a number of formats.

Reliability data

The purpose of the line reliability analysis tool is to allow the user to generate useful reliability performance data for a particular line. The analysis is conducted between a start date and end date that are selected by the user. The relia-bility statistics reported include the following items on a per phase basis:

• The recorded number of detected surge events• The recorded number of detected fault events• The recorded number of fault clearing events• The recorded number of permanent fault events• The total duration of outages due to permanent fault

events.

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DescriptionSiemens Connect software


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Fusesaver protection – time-current curve

Fault detection is achieved with a cutting-edge, high speed protection algorithm that is capable of detecting faults with-in 2 ms. On the first trip the Fusesaver can clear the fault in the first half cycle when required.

The default Fusesaver protection algorithm uses an inverse protection curve that is based upon an i2t value.

When the Fusesaver is installed in series with a partner fuse, the algorithm ensures that the fault is cleared before its partner fuse starts to melt. At time of commissioning, the Fusesaver is configured to know the type and rating of its partner fuse that it is saving.

When the Fusesaver is installed as a fuse replacement with the open-close-open functionality, the i2t of the in-verse curve is set at best to approximately the rating of the fuse being replaced. At time of commissioning, the Fusesaver is configured to know the type and rating of the fuse that it is replacing.

The Fusesaver can store two protection curves, a NORMAL and a FAST protection curve. The inverse part of the curve (d) is defined by the i2t of the fuse type the Fusesaver is protect-ing or replacing and is common to both curves. Additional configuration items required for each curve are the pick-up level (d1), the maximum time element (d2), the instanta-neous multiplier (d3) and the minimum time element (d4).

Minimum trip current multiplier

The minimum trip current is a multiple of the fuse rating and sets the pickup level for the protection functionality. This is the current level above which the Fusesaver senses a fault. For example, if the Fusesaver is set for a 12 A fuse and a minimum trip level of x3 is selected, then any current below 36 A will not be recognized as a fault.

Maximum fault time setting

Once the current has risen above the minimum trip level, the Fusesaver picks the fault and will trip on an inverse-time basis to save the fuse. However, if the inverse-time protec-tion has not tripped the Fusesaver before the maximum fault time is reached, then the Fusesaver will trip.

Minimum fault time setting

Once the current has risen above the minimum trip level, the Fusesaver has picked up the fault and will trip on an inverse time basis. However, the Fusesaver will not trip before the minimum trip time has been reached.

Instantaneous trip setting

The Fusesaver runs an inverse time curve to match the fuse that it is protecting. However the Fusesaver can also be set to trip instantaneously for faults above a certain level.

The Fusesaver instantaneous protection works as a multiple of the fuse rating. So, for example, if the fuse rating is 10 A and the instantaneous multiplier is set to x5, then the Fusesaver will trip instantly for faults above 50 A.

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Fusesaver with partner fuse – time-current curve (a FAST protection curve is possible to add as shown in the lower picture on this page)

Fuse replacement protection – time current curve

d1 Minimum trip current multiplier (×2/×1)d2 Maximum fault time (1.5 sec/1 sec)d Fusesaver that replaces a K type 30 A fused3 Instantaneous multiplier (×20/×8)d4 Minimum fault time (0.1 sec/OFF)

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DescriptionProtection functions

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Three-phase lockout protection

Pseudo three-phase trip protection

Pseudo three-phase trip and three-phase lockout


1.1

Configurable dead time

The dead time is the period after the Fusesaver has tripped on a fault and before it closes. In general, the longer the dead time the greater the chance that a transient fault will be cleared by the operation of the Fusesaver. The dead time is a configuration option in the range 1 - 30 s (O-C) or 2 - 30 s (O-CO).

Three-phase lockout protection

When all the Fusesavers on a line are fitted with communica-tions modules, it is possible to configure them so that if any one of them detects a permanent fault then after a start de-lay of typically less than 2 s, all three phases will be tripped and stay tripped.

The two options are:

• Three-phase LOCKOUT DISABLED, this is the default• Three-phase LOCKOUT ENABLED.

Note that three-phase lockout operation can be affected by the position of the protection-OFF lever.

Pseudo three-phase trip protection

When all the Fusesavers on a line are fitted with communi-cations modules, it is possible to configure them so that if one detects a fault and trips, the other two phases will trip shortly afterwards (typically less than 2 s). The three phases will then reclose simultaneously after the dead time of the Fusesaver that tripped first. This feature may be used to block backfeed current on a delta load circuit.

Pseudo three-phase trip and three-phase lockout

When both pseudo three-phase trip and three-phase lockout functions are enabled, the Fusesavers will act like a three-phase soft ganged reclosing circuit-breaker.

DescriptionProtection functions


1.1

Protection modes

The operation of the Fusesaver protection can be altered by changing the protection mode. The modes available depend upon whether the Fusesaver is used with a partner fuse or as a fuse replacement. Further, the Fusesaver will store a mode selection that is applicable if the external lever is in the UP or DOWN position to allow users to adjust to different opera-tional requirements when a live line crew is working down-stream of a Fusesaver. The following modes are possible:

Mode O-C O-CO Functionality

Protection OFF YES YES The Fusesaver will not trip on a fault.

Normal YES NOThe Fusesaver trips based on the NORMAL curve settings and recloses after the dead time.

Fast YES NOThe Fusesaver trips based on the FAST curve settings and recloses after the dead time.

Normal-normal NO YES

The Fusesaver trips based on the NORMAL curve settings. The Fusesaver recloses after the dead time. If the fault is still present the Fusesaver trips a 2nd time based on the NORMAL curve settings and then stays in the open state.

Normal-fast NO YES

The Fusesaver trips based on the NORMAL curve settings. The Fusesaver recloses after the dead time. If the fault is still present the Fusesaver trips a 2nd time based on the FAST curve settings and then stays in the open state.

Fast-normal NO YES

The Fusesaver trips based on the FAST curve settings. The Fusesaver recloses after the dead time. If the fault is still present the Fusesaver trips a 2nd time based on the NORMAL curve settings and then stays in the open state.

Fast-fast NO YES

The Fusesaver trips based on the FAST curve settings. The Fusesaver recloses after the dead time. If the fault is still present the Fusesaver trips a 2nd time based on the FAST curve settings and then stays in the open state.

Normal single YES YESThe Fusesaver trips based on the NORMAL curve settings. The Fusesaver does not reclose and stays in the open state.

Fast single YES YESThe Fusesaver trips based on the FAST curve settings. The Fusesaver does not reclose and stays in the open state.

The protection mode in force is determined as follows:

a) If the external lever is UP, the lever UP settings will be in force. This represents the usual expected operation of the Fusesaver.

b) A local operator pulls the external lever down. In this case, the Fusesaver protection is forced to a mode that is prede-termined by the user under this situation.

c) A remote operator using a SCADA (Supervisory Control and Data Acquisition) system sets the mode. To do this, an RCU must be installed.

d) A local operator uses a control panel in an RCU to set the mode.

StandardsThe Fusesaver conforms to the relevant sections of the following standard:

• IEC 62271-100

Ambient conditions

The Fusesaver is suitable for use in outdoor environments with ambient temperatures in the range of – 40 °C to +50 °C and relative humidity in the range of 0 % to 100 %.

Altitude correction factor

The dielectric strength of air insulation decreases with in-creasing altitude due to low air density. The rated lightning impulse withstand voltage values specified in the chapter “Technical Data” apply to a site altitude of 1,000 m above sea level. For an altitude above 1,000 m, the insulation level must be corrected according to the drawing as per IEC 62271-1.

The characteristic shown applies to the rated short-duration power-frequency withstand voltage and the rated lightning impulse withstand voltage.

To select the devices, the following applies:

U ≥ U0 × KaU Rated withstand voltage under standard reference atmosphereU0 Rated withstand voltage requested for the place of installationKa Altitude correction factor according to the opposite diagram

Example

For a requested rated lightning impulse withstand voltage of 75 kV at an altitude of 2,500 m, an insulation level of 90 kV under standard reference atmosphere is required as a mini-mum: 90 kV ≥ 75 kV × 1.2

Number of operating cycles

The Fusesaver is maintenance-free for 2,000 operating cycles.

The Fusesaver has been type tested for 70 short-circuit breaking operations at 4 kA and 30 short-circuit operations at 6.3 kA.

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DescriptionProtection modes, standards, ambient conditions, altitude correction factor and number of operating cycles


1.1Model type Low range Standard range High range

Minimum line current for operation A 0.15 0.5 1.0Fuse ratings A 2 to 20 5 to 50 5 to 100Rated current A 40 100 200Rated short-circuit breaking current Isc kA 1.5 4 6.3Rated short-circuit making current Ipeak kA 3.75 10 16Rated short-time current kA 1.5 4 6.3Rated short-time current duration s 0.2 0.2 0.5Fault break operations at 100 % No. 300 70 30

The low range, standard range and high range Fusesavers are all available with the following voltage rating options:

Rated voltage kV 15.5 27

Rated lightning impulse withstand voltage Up kV 110 125Rated power-frequency withstand voltage Ud (60 s) kV 50 60

Scope of deliveryFusesaverOperating mechanism Magnetic actuatorSwitching medium Vacuum interrupterPosition indicator OPEN: green / CLOSED: redSensors Integrated current transformersMounting assembly • Line clamping assembly incl. bird guard (recommended)

• Pole mounting assembly incl. wildlife guard (recommended) • Cross-arm mounting assembly incl. wildlife guard (recommended)

Communication With optional communications moduleSoftware for operation and configuration Siemens ConnectTools Communications module attachment toolAccessories / spare parts A wide range of accessories and spare parts can be supplied (refer to selection on page 30)

Product range overview

The first main selection option is linked to the minimum line current available to power the Fusesaver. Three options are available:

• Low range Fusesaver• Standard range Fusesaver• High range Fusesaver.

DescriptionProduct range overview and scope of delivery


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Remote Control Unit 3AD8

DescriptionContents

1.2


Remote Control Unit 3AD8

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Remote Control Unit Description 19

General 20RCU principle 20

The RCU system 21RCU cubicle 21Electronics housing 22Radio tray 22Cubicle heater 22User interface 22Operator panel 23Isolated input 23Solar panel 23Voltage transformer 23

Communications interface 24Communications protocol 24RCU Connect software 24RCU Probe software 24

Standards 25Ambient conditions 25Scope of delivery 25

Contents Page

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DescriptionGeneral

Siemens Remote Control Unit

The Remote Control unit (RCU) is an optional addition to the Fusesaver system used to connect the Fusesaver pole-mounted circuit-breaker into a utility SCADA system. The RCU is a pole-mounted enclosure containing a micro-processor, a short range (approximately 20 m) radio used to communicate with the Fusesaver and a long range ra-dio (or modem).

The design and testing of the RCU is according to the relevant parts of IEC 60950-1:2005 Information technology equip-ment – Safety.

RCU principle

The RCU acts as an interface between a set of Fusesavers on the power line and a utility SCADA system. To do this, the RCU uses its configuration to find and access installed and running Fusesavers mounted on the power pole. It communi-cates with the Fusesavers using its built-in short range radio.

The Fusesavers are installed on each of the phases of the power line and are organized to work as a set to control that line. One, two or three Fusesavers can be organised in this way for a single-phase, two-phase or three-phase line. An RCU provides access to the Fusesavers on a single power line, so that if there are multiple lines at a site, then a separate RCU is required for each line.

On start up, the RCU turns on its short range radio and scans for transmissions from the Fusesavers which match its con-figuration.

When it finds them, it will acquire data from the Fusesavers and put it into its database ready for re-transmission over a long range radio (or modem) back to the utility SCADA sys-tem master station using the DNP 3 protocol. The long range radio is mounted in the radio tray by the utility and is pro-vided with power by the RCU electronic system. Data in the RCU database includes information about the Fusesavers and the RCU itself. Usually a subset of this data is mapped into the protocol used by the SCADA system.

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1 3 2

5

6

4

8

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DescriptionThe RCU system, RCU cubicle

1 Conductor2 Fusesaver3 Communications module4 Fuse

5 Remote Control Unit6 Earth connection7 Mains connection8 Antenna for long range

communications

The RCU system

In order to minimize installation and operating costs, the Siemens Remote Control Unit was developed as part of an integrated system of tools and accessories. All system com-ponents work together, which permits easy installation, fast commissioning, and reliable operation in all conditions.

A typical Fusesaver and RCU installation includes the follow-ing items for each phase:

1. Fusesavers with communications modules

2. Remote Control Unit

3. Solar power

Configuration of the RCU is achieved through a wireless connection to a PC application called RCU Connect.

RCU cubicle

The RCU enclosure in mounted to the pole using the pole-mounting bracket and is manufactured from powder-coated stainless steel for long service life. Material options are avail-able at time of ordering including 304 (standard) and 316 grade stainless steel.

The RCU enclosure has a handle with internal three-point locking mechanism. An external padlock can be fitted to restrict access.

On the top of the RCU enclosure is a high grade UV-stabilized plastic shade hood. This shade hood serves to reduce solar heating and to provide an aperture for the short range radio.

At the rear of the RCU enclosure there is an earth stud and a number of openings fitted with cable glands to allow exter-nal wiring to access the internals of the RCU.

2

3 1

1 Fusesavers with communications modules

2 Remote Control Unit

3 Solar panel

A typical Fusesaver and RCU installation includes the following items for each phase:

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DescriptionElectronics housing, radio tray, cubicle heater, user interface

Electronics housing

The electronics housing contains the microprocessor, bat-tery, power connection terminals, data connection points and the user interface for the RCU. The RCU has a simple user interface for operations and maintenance purposes. The RCU front panel has a number of LED indicators. The LEDs are normally off (to reduce power consumption) and turn on automatically while the door is open as controlled by the position of the door switch.

The electronics housing also holds the 12 V, 7.2 Ah lead acid battery. The electronics housing is normally powered by a selectable 115/230 V AC low-voltage supply.

Radio tray

The radio tray is available for fitting the customer-specific radio, modem or other means to connect to the utility’s SCADA system.

The radio tray hinges down and allows access to the radio behind. When in the hinged up position the tray provides a degree of protection from driving rain.

Cubicle heater

The cubicle heater is an optional accessory mounted behind the radio tray and connected to the power supply isolator. It has a positive temperature coefficient element which acts as a thermostatic heater keeping the battery and electronic compartment above –15 °C for ambient temperatures as low as –40 °C.

Note that a power supply isolation unit is required if a heater is fitted.

User interface

The RCU provides a basic user interface on the electronics housing primarily to aid during commissioning. There are a range of toggle switches to allow the local user to turn ON/OFF various parts of the RCU system. An LED indicator display shows the status of the different inputs and outputs of the RCU.

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DescriptionOperator panel, isolated input, solar panel, voltage transformer

Operator panel

The Fusesaver operator control panel is an optional ac -cessory mounted on the radio tray and connected to the RCU electronics compartment. The operator control panel allows a local user to trip and close the Fusesavers or to change protection mode active in the Fusesavers. It also provides additional status information.

Isolated input

The power supply isolation unit is an optional accessory that provides a point of isolation for the electronics housing and the cubicle heater. Where an isolator is fitted the incoming mains is connected to the isolator and the isolator provides sockets for the electronics assembly and for the heater.

The isolation unit is required if:

• The RCU is mains powered and if it is preferred to provide a point of isolation inside the cubicle for changing the electronic housing. Note that the user will still need to provide a point of isolation for the wiring to the RCU.

• A cubicle heater is fitted.The isolation unit is not an applicable option for a solar pow-ered RCU.

Solar panel

Where an LV mains supply is not available, Siemens has a so-lar panel option to provide charge to the batteries. The solar panel is sized to provide adequate charge for energy efficient radios and modems in latitudes less than 45 °. The panel an-gle can be adjusted between two settings to optimize perfor-mance for given latitudes. The solar panel must be mounted on the same power pole as the RCU.

The solar panel is connected into the terminal compartment to a dedicated set of terminals as an alternative to the mains supply.

Solar ratings Value

Power ratings 65 W Nominal voltage 12 VCell type Polycrystalline

Voltage transformer

Where LV mains is not available and solar power in not practical, the RCU can be powered by a voltage transform-er mounted above the RCU and connected to the MV lines. Optional surge arresters are also available.

VT ratings

Primary voltage 11/22 kV 15 kV 27 kV 11/22 kV 15 kV 27 kV

Type p-p p-p p-p p-e p-e p-e

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According to IEC 60044-2

1.2


DescriptionCommunications interface, communications protocol, RCU Connect software, RCU Probe software

Communications interface

In order to communicate with the SCADA system master station a long range radio or modem is required. The RCU electronics provide a serial asynchronous data interface (RS232) and an Ethernet port (RJ45) for this purpose.

A purpose-built cable connects the radio/modem to the RCU interface. The design and construction of this cable may be carried out by the customer or as a value added service pro-vided by the Siemens Service Center.

Communications protocol

The RCU supports the DNP 3.0 over both serial link and IP protocol.

RCU Connect software

RCU Connect is a PC application that allows the user to easily configure a Remote Control Unit and to check the operation of a Remote Control Unit in service. It also provides a means for configuration of the protocol mapping.

RCU Probe software

RCU Probe is a PC program that allows a user to directly connect to the RCU via Ethernet cable to view the current state of the protocol database. RCU Probe allows the user to override the value or qualifiers of all points in the protocol database in order to verify their change of state at the utility SCADA control room. The user may also send controls, times and view some general logging information.

The intended users of RCU Probe are the utility SCADA technical staff for the purpose of verifying the correct operation of the SCADA system, communications system and RCU itself.

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DescriptionStandards, ambient conditions, scope of delivery

Standards

The design and testing of the Remote Control Unit is according to the relevant parts of IEC 60950-1: 2005 Information technology equipment – Safety.

Ambient conditions

The Remote Control Unit is suitable for use in outdoor environments with ambient temperatures in the range of –40 °C to +50 °C and relative humidity in the range of 5 % to 95 %. For temperatures below –15 °C, the cubicle heater will be required.

Scope of deliverySpecifications ValuePower supply 115 / 230 V AC mains

12 V/7.2 Ah battery backupSolar power options

Radio power supply User set variable 3 – 9 V 2 A or 12 V battery supply 5 ARadio data interface Serial asynchronous RS232 or user set logic levels variable 3 – 9 V or 10/100 Base T EthernetRadio compartment size 170 × 215 × 100 mmStandard protocol DNP 3.0Software for operation and configuration is: RCU Connect softwareWeight 18 kg

– 40 °C

+ 50 °C

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Product SelectionContents

Siemens Remote Control Unit (RCU) 3AD8


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Product Selection 27

Ordering data and configuration example 28

Selection of Fusesaver 29

Selection of Remote Control Unit 30

Selection of additional equipment 31

Selection of accessories and spare parts 32

Contents Page

2


Product SelectionOrdering data and configuration example

Order number structure

The Siemens Fusesaver order number either configures a Siemens Fusesaver or a Remote Control Unit. The relevant data make up the 16-digit order number. The primary part covers the main electrical data of the Fusesaver or specifies an RCU. The secondary part covers the mounting assembly, communication options and others.

Order codesIndividual equipment versions, marked with 9 or Z in the 8th to 16th position, are explained more in detail by a 3-digit order code. Several order codes can be added to the order number in succession and in any sequence.

Special versions

In case of special versions, “-Z” is added to the order number and a descriptive order code follows. If several special versions are required, the suffix “-Z” is listed only once. If a requested special version is not in the catalog and can therefore not be ordered via order code, it has to be identified with Y 9 9 after consultation. The agreement hereto is made between your responsible sales partner and the order processing department.

Configuration example On the foldout page we offer a configuring aid. Here you can fill in the order number you have determined for your Fusesaver and RCU.

Example for Order No.: 3 A D ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼

Order codes:

a: alphabetical n: numericalPosition: 1 2 3 4 5 6 7 – 8 9 10 11 12 – 13 14 15 16 Order codes

Order No.: 3 A D n n n n – n a a n n – n a a n – ★ ◼ ◼ ◼

Primary part1st position Superior group

Switching devices

2nd position Main groupCircuit-breaker

3rd position Subgroup

4th to 7th position Basic equipmentDesign and ratings of the Siemens Fusesaver or selection of a RCU

Secondary part8th to 16th position Fusesaver assembly equipment,

communication options, RCU options

Order codesGroup of 3 after the Order No. Format: a n a

Special versions (★)Initiated with “-Z” Group of 3 after the Order No. Format: a n n

2


Product SelectionSelection of Fusesaver

Fusesaver Configuration

Position: 1 2 3 4 5 6 7 – 8 9 10 11 12 – 13 14 15 16 Order codes

Order No.: 3 A D ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ – ★ ◼ ◼ ◼

Rate

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15.5 110 50 1.5 40 3 A D 8 2 3 4 A 0 0 0 A A4 100 3 A D 8 2 2 2 A 0 0 0 A A

6.3 200 3 A D 8 2 4 3 A 0 0 0 A A27 125 60 1.5 40 3 A D 8 4 3 4 A 0 0 0 A A

4 100 3 A D 8 4 2 2 A 0 0 0 A A6.3 200 3 A D 8 4 4 3 A 0 0 0 A A

Fusesaver assembliesNo Fusesaver clamping/mounting assembly 0Line clamping assembly incl. bird guard (recommended) 1Pole mounting assembly incl. wildlife guard (recommended) 2Cross-arm mounting assembly incl. wildlife guard (recommended) 3In-line tension mounting kit 4Pole- or cross-arm mounting assembly without insulator 2 or 3 Z T 3 1Clamping assembly without bird/wildlife guard 1, 2 or 3 Z T 3 2Mounting brackets in 304 stainlees steel 2, 3 Z T 3 3Imperial fastener mounting for US market (no fasteners included) 1, 2, 3 or 4 Z T 3 4

Communications moduleWith communications module B Without communications module C

Language of operation manual, rating plate English 1Other languages on request (increased delivery time) 9 R 1 Y

Fusesaver additional options Position indicator with interchanged colors “Green: CLOSED, Red: OPEN” Z T 0 7

Fusesaver configuration example 1 × Fusesaver (27 kV, 4 kA, 100 A), 1 × line clamping assembly incl. bird guard, 1 × communications module

3 A D 8 4 2 2 – 1 B A 0 0 – 0 A A 1

2


Remote Control Unit (RCU) Configuration


Order No.: 3 A D ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ – ★ ◼ ◼ ◼

Remote Control Unit (RCU) 3 A D 8 8 0 0 0 A

RCU battery type:7.2 Ah lead acid B

RCU enclosure316 stainless steel, powder-coated 2304 stainless steel, powder-coated 3

RCU mounting assemblyNo RCU mounting assembly 0Standard pole mounting assembly 1Side mounting assembly 2

RCU protocol: DNP 3.0 1

RCU isolator and heaterNone AExternal isolated mains input BExternal isolated mains input and heater C

Operator panelNone ARCU operator panel – Fusesaver OC (Modes) BRCU operator panel – Fusesaver OCO (Modes) D

Language of operation manual, rating plateEnglish 1Other languages on request (increased delivery time) 9 R 1 Y

RCU configuration example RCU battery type: 7.2 Ah lead acid, RCU enclosure: 304 stainless steel powder-coated, standard pole mounting assembly, RCU protocol: DNP 3.0, without RCU isolator and heater, without operator panel

3 A D 8 8 0 0 – 0 A B 3 1 – 1 A A 1

Product SelectionSelection of Remote Control Unit (RCU)

2


Product SelectionSelection of additional equipment (communication, mounting assembly, demo kits)

Fusesaver and RCU Communication, mounting assembly, demo kits


Order No.: 3 A X ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ – ★ ◼ ◼ ◼

Fusesaver communicationFusesaver communications module 3 A X 1 3 5 0 – 1 AFusesaver communications module attachment tool 3 A X 1 3 5 0 – 1 BFusesaver PC communications kit 1) 3 A X 1 3 5 0 – 1 CFusesaver communications module carry case kit 2) 3 A X 1 3 5 0 – 1 D

Fusesaver mounting assemblyFusesaver bird guard 3 A X 1 3 5 0 – 2 AFusesaver wildlife guard (set of 3) 3 A X 1 3 5 0 – 2 BFusesaver cross-arm bracket fish plate kit 3 A X 1 3 5 0 – 2 CFusesaver wildlife guard (1 piece) 3 A X 1 3 5 0 – 2 DFusesaver wildlife guard clip (1 piece) 3 A X 1 3 5 0 – 2 EFusesaver line clamping assembly 3 A X 1 3 5 0 – 3 AFusesaver pole mounting assembly 3 A X 1 3 5 0 – 3 BFusesaver pole mounting assembly without insulator 3 A X 1 3 5 0 – 3 EFusesaver cross-arm mounting assembly 3 A X 1 3 5 0 – 3 FFusesaver cross-arm mounting assembly without Insulator 3 A X 1 3 5 0 – 3 J

Fusesaver demo kitsFusesaver demo kit (27 kV / 1.5 kA / 40 A Fusesaver) 3) 3 A X 1 3 5 0 – 4 DFusesaver demo kit (27 kV / 4 kA / 100 A Fusesaver) 3) 3 A X 1 3 5 0 – 4 ECurrent injection set (for Fusesaver presentation) 3 A X 1 3 5 0 – 4 F

1) 1 × PC application: Siemens Connect, 1 × USB radio antenna2) 3 × communications module, 1 × communications module attachment tool,

1 × PC communications kit, 1 × heavy-duty case 3) 1 × Fusesaver, 1 × line clamping assembly, 1 × bird guard,

2 × communications module, 1 × communications module attachment tool, 1 × PC communications kit, 1 × vacuum interrupter, 1 × heavy-duty case

2


Product SelectionSelection of accessories and spare parts

Fusesaver and RCU Accessories / spare parts


Order No.: 3 A X ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ – ★ ◼ ◼ ◼

RCU accessories / spare partsRCU battery 7.2 Ah lead acid 3 A X 1 3 5 0 – 6 ARCU solar panel kit 65 W 3 A X 1 3 5 0 – 6 BRCU VT kit p-p 11/22 kV 3 A X 1 3 5 0 – 6 CRCU VT kit p-p 15 kV 3 A X 1 3 5 0 – 6 DRCU VT kit p-p 27 kV 3 A X 1 3 5 0 – 6 ERCU VT kit p-g 11/22 kV 3 A X 1 3 5 0 – 6 FRCU VT kit p-g 15 kV 3 A X 1 3 5 0 – 6 GRCU VT kit p-g 27 kV 3 A X 1 3 5 0 – 6 HRCU serial cable RS232 + power 3 A X 1 3 5 0 – 6 IRCU side mounting assembly 3 A X 1 3 5 0 – 7 ARCU standard pole mounting assembly 3 A X 1 3 5 0 – 7 BRCU radio tray heater (requires RCU external isolated mains input) 3 A X 1 3 5 0 – 8 ARCU external isolated mains input 3 A X 1 3 5 0 – 8 BRCU operator panel – Fusesaver OC (Modes) 3 A X 1 3 5 0 – 8 CRCU operator panel – Fusesaver OCO (Modes) 3 A X 1 3 5 0 – 8 D

3


Technical DataContents


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Technical Data 33

Electrical data, dimensions and weights 34

Dimension drawings 35

Contents Page

3


Technical DataElectrical data, dimensions and weights

15.5 kV

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Order No. A A A s kA kA s No. No. kV kV µΩ mm kg

3AD8 234 40 0.15 2-20 ◼ 1.5 3.75 0.2 300 2000 110 50 11500 438 5.5

3AD8 222 100 0.50 5-50 ◼ 4 10 0.2 70 2000 110 50 8070 438 5.5

3AD8 243 200 1.00 5-100 ◼ 6.3 16 0.5 30 2000 110 50 390 438 5.5

27 kV Ir I tk ISC Ipeak tk Up Ud

A A A s kA kA s No. No. kV kV µΩ mm kg

3AD8 434 40 0.15 2-20 ◼ 1.5 3.75 0.2 300 2000 125 60 11500 438 5.5

3AD8 422 100 0.50 5-50 ◼ 4 10 0.2 70 2000 125 60 8070 438 5.5

3AD8 443 200 1.00 5-100 ◼ 6.3 16 0.5 30 2000 125 60 390 438 5.5

◼ Standards according to IEC 62271-100

3


Technical DataDimension drawings

Dimension drawings (mm)

Fusesaver, communications module and line clamping assembly

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15.5 – 27 kV Fusesaver pole mounting assembly – composite insulator

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15.5 – 27 kV Fusesaver cross-arm mounting assembly – composite insulator

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Fusesaver with communications moduleFusesaver

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Technical DataDimension drawings

Remote Control Unit (RCU)

Solar panel (RCU powering option)

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Dimension drawings (mm)

4


AnnexContents

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Annex 37

Benefits 38

Inquiry form 39

Configuration aid Foldout page

Contents Page

4


AnnexBenefits

Benefits

Your technology benefits at a glance

• Half-cycle switching – fastest vacuum circuit-breaker on the market• Smart-grid-ready with communications module and Remote Control Unit (RCU)• Highly integrated and innovative technology• Protection, monitoring and control in a single unit• Self-powered

Your handling benefits at a glance

• Lightweight (5.5 kg)• Fast and easy installation – plug and play• Simple line installation• Safety benefits for live-line crew thanks to half-cycle switchingWhen the external lever is configured to FAST SINGLE mode, this greatly reduces the consequences of accidents during live- line work. With instantaneous protection that breaks the current in a half cycle, arc burns are greatly reduced and survival chances increase.

The Fusesaver can be used as a ganged switch. When the actuator on one phase is operated, all phases will synchro-nously open/close after a delay of approx. 60 sec. This provides the benefit of avoiding ferroresonance and for operators to be cleared off the area when the switching operation occurs.

Your cost benefits at a glance

• Return on investment typically in less than two years• Improved network reliability means fewer penalty payments for both

– SAIFI and – SAIDI – Reduced operating costs thanks to reduced maintenance callouts

Siemens Fusesaver – an optimally compact design matched with rapid ROI*

Higher availability, lower network maintenance costs – the Siemens Fusesaver helps protect your competitive edge.

The first saved fuse pays the installation costs, the second saves your money …

In a typical distribution network, the average outage duration per year (SAIDI) is within the range of hours per lateral line**. Installing a Siemens Fusesaver can reduce this duration to an absolute minimum, saving you thousands of dollars every year.

*) Return on Investment**) Also referred to as lateral lines, T-off or T-taps


Please copy, fill in and return to your Siemens partner

Inquiry concerning

☐ Fusesaver and Remote Control Unit 3AD8

Please

☐ Submit a quotation☐ Call us☐ Visit us

Siemens AG

Dept.

Name

Street

Postal code/city

Fax

Your address

Company

Dept.

Name

Street

Postal code/city

Country

Phone

Fax

E-mail

AnnexInquiry form

4

1 2 3 4 5 6 7 – 8 9 10 11 12 – 13 14 15 16

3 A D ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ ◼ – ◼ ◼ ◼ ◼ – Z

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3 A D – –

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You prefer to configure your Siemens Fusesaver and Remote Control Unit 3AD8 on your own?Please enter the order number in the configuration aid

2017

Published by Siemens AG 2017

Energy Management Division Medium Voltage & Systems Mozartstraße 31 C 91052 Erlangen, Germany

Energy Management Division Medium Voltage & Systems Nonnendammallee 104 13629 Berlin, Germany siemens.com

For more information, please contact our Customer Support Center Phone: +49 180 524 70 00 Fax: +49 180 524 24 71 (Charges depending on provider) E-mail: [email protected]

Article No. EMMS-K1511-A431-A3-7600 Printed in Germany Dispo 40401 PU 184/3031 KG 0617 1.0

Subject to changes and errors. The information given in this document only contains general descriptions and/or performance features which may not always specifically reflect those described, or which may undergo modification in the course of further development of the products. The requested performance features are binding only when they are expressly agreed upon in the concluded contract.

http://www.siemens.com

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