abb ret615 v2.0 ptt user manual enu

8/10/2019 Abb Ret615 v2.0 Ptt User Manual Enu

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OMICRON PTL ABB RET615 V2.0 PTT User Manual

OMICRONelectronics GmbH 1/7

OMICRON PTL

ABB RET615 V2.0 PTT

User Manual

V1.000


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Content

1. General ............................................................................................................................................ 31.1 Supported Relays ........................................................................................................................... 3

2. Software and Hardware Requirements ........................................................................................... 3

3.

Hardware ......................................................................................................................................... 4

Hardware configuration for earth-fault protection on winding 1 side................................................ 4

Hardware configuration earth-fault protection winding 2 side ......................................................... 5

4. Functional Range ............................................................................................................................ 5

5. XRIO Converter ............................................................................................................................... 5

5.1 Specialties of the Additional Information Block ................................................................................ 6Transformer Data .......................................................................................................................... 6

Configuration Details ..................................................................................................................... 6

6. Specific Protection Tests ................................................................................................................ 66.1 Differential Protection ..................................................................................................................... 6

Diff Configuration test .................................................................................................................... 6

Diff Operating Characteristic test ................................................................................................... 6

6.2 Low Impedance Restricted Earth-fault ............................................................................................ 6External fault ................................................................................................................................. 6

Pick-up.......................................................................................................................................... 6

Trip time ........................................................................................................................................ 6

Harmonic blocking......................................................................................................................... 6

6.3 High Impedance Restricted Earth-fault ........................................................................................... 7Pick-up and drop-off ...................................................................................................................... 7

Trip time ........................................................................................................................................ 7


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1. General

This user manual describes details of testing ABB RET615 relays with the OMICRONProtection Test Template. General information on the usage of OMICRON Protection Testing Library

items can be found in the OMICRON PTL user manual.

The template has been tested with the following relay:Manufacturer: ABBModel: RET615Firmware Version: 2.0.5

1.1 Supported Relays

The following relays can be tested with the Protection Test Template:

RET615 Variant A

RET615 Variant B

RET615 Variant C

RET615 Variant D

2. Software and Hardware Requirements

To use this template, you must have a valid test license for the OMICRON Test Universe 2.40software orhigher versions and the following test modules:

Control Center

Quick CMC

Ramping

Advanced Differential

State Sequencer

Overcurrent

A CMC test set with six current outputs is required. A CMA 156current amplifier may be additionallyrequired for testing with higher currents e.g. relays with 5A current measuring inputs.


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3. Hardware

There are multiple possibilities of wiring a RET615relay to a CMC test set. The advised connections areshown inFigure 1.These connections are the default settings in the Hardware Configurationof the PTT.

Relaytripwinding1

Connection for RET615

CBaux.winding152a

CBaux.winding252a

X120-8

X120-2

X120-4

X120-6

X120-1-3-5

X120-10

X120-12

X120-7-9-11

Relaytripwinding2

Start

Figure 1: Connection for ABB RET615

Hardware configuration for earth-fault protection on winding 1 side

For testing of earth-fault protection functions (low or high impedance restricted earth-fault, non-directionalearth-fault) on the winding 1 side the connection should be changed as the diagram below:

Relaytripwinding1

Connection for RET615Winding 1 Side Earth-fault Protection

X120-8

X120-14

X120-13

X120-10

X120-12

X120-7-9-11

Relaytripwinding2

Start

Figure 2: Connection for ABB RET615 earth-fault winding 1 side


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5.1 Specialties of the Additional Information Block

Transformer Data

The information on the nominal power of the protected object should be entered under the "NominalPower". This parameter is used to display the transformer model in the test report correctly.

Configuration Details

The Configuration Detailsblock contains specific information of the tested relay. The "Relay Variant"parameter automatically collects the relay variant from the Relay Parameter Section. The Generic Timerblock contains the parameter "Pulse time" for adjustment of the duration of the TRIP output signal.

6. Specific Protection Tests

In this chapter any existent test specialty of the ABB RET615 Protection Test Templatethat differs from

the explained in the OMICRON PTL user manual is described.

6.1 Differential Protection

Diff Configuration test

Test modules for faults in winding 1 and winding 2 are available, but only the test modules of thereference side will be active. This is valid for all vector group settings.The configuration test for L-N and L-L fault types is not supported for Clock number settings of2, 4, 8 or10. The correspondent test module is deactivated in any of these cases.

Diff Operating Characteristic test

The operating characteristic test for L-N and L-L fault types is not supported for Clock number settings of2, 4, 8 or10. The correspondent test modules are deactivated in any of these cases.

6.2 Low Impedance Restricted Earth-fault

External fault

An external fault is simulated using the State Sequencertest module. The angle between the residualcurrent (calculated 3I0) and the neutral current (measured IN) is set in external fault range and the relayshould not trip.

Pick-up

The pickup of the low impedance restricted earth-fault stage is tested with the Rampingtest module. Thefault current (neutral current IN) is ramped until the relay picks up.

Trip time

The trip time is tested by simulating an internal fault. The State Sequencertest module is used for the trip

time test.

Harmonic blocking

The harmonic blocking is tested by simulating an internal fault with high content of the second harmonic.The Rampingtest module is used to decrease the second harmonic content to a value at which the relaytrips.This value is then compared to the first harmonic content and assessed.


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6.3 High Impedance Restricted Earth-fault

Pick-up and drop-off

The pickup and drop-off of the high impedance restricted earth-fault stage is tested with the Rampingtestmodule. The fault current (neutral current 3IN) is ramped until the relay picks up. The second ramp should

decrease until the relay's start signal drops off.

Trip time

The trip time is tested by simulating an internal fault with the Overcurrenttest module. Test points arepreset in this test, but they can be adjusted by the user if necessary.

abb ret615 v2.0 ptt user manual enu

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