LV SWITCHGEAR

Prod

ucts

Vol

. 02

DOL STARTERS

kW SIZE COMPARTMENT HEIGHT (mm)

30 1/12 150 (1 MODULE)

37 1.5/12 225 (1.5 MODULES)

75 2/12 300 (2 MODULES)

110 3/12 450 (3 MODULES)

160 4/12 600 (4 MODULES)

DOL STARTERS + IMM STARTERS

kW SIZE COMPARTMENT HEIGHT (mm)

22.5 1÷1.5/12 150 (1 MODULE)

37 1.5/12 225 (1.5 MODULES)

75 2/12 300 (2 MODULES)

110 3/12 450 (3 MODULES)

160 4/12 600 (4 MODULES)

LINE FEEDERS 3P/4P

A SIZE COMPARTMENT HEIGHT (mm)

100 1/12 150 (1 MODULE)

100 1.5/12 225 (1.5 MODULES)

200 2/12 300 (2 MODULES)

250 3/12 450 (3 MODULES)

280 4/12 600 (4 MODULES)

FRONT ACCESS

DIMENSIONS & SIZING DATA WITHDRAWABLE UNITS / CHASSIS DIMENSIONING

FRONT ACCESS

DOL STARTERS

kW SIZE COMPARTMENT HEIGHT (mm)

22.5 1.5/12 225 (1.5 MODULES)

37 2/12 300 (2 MODULES)

55 3/12 450 (3 MODULES)

90 4/12 600 (4 MODULES)

110 5/12 750 (5 MODULES)

160 6/12 900 (6 MODULES)

240 8/12 1200 (8 MODULES)

LINE FEEDERS 3P

A SIZE COMPARTMENT HEIGHT (mm)

100 1/12 150 (1 MODULE)

200 2/12 300 (2 MODULES)

250 3/12 450 (3 MODULES)

400 4/12 600 (4 MODULES)

630 5/12 750 (5 MODULES)

800 6/12 900 (6 MODULES)

LINE FEEDERS 4P

A SIZE COMPARTMENT HEIGHT (mm)

100 1.5/12 225 (1.5 MODULES)

200 2.5/12 375 (2.5 MODULES)

250 3/12 450 (3 MODULES)

400 4/12 600 (4 MODULES)

630 05/12 750 (5 MODULES)

800 6/12 900 (6 MODULES)

DIMENSIONS & SIZING DATA FIXED UNITS /

CUBICLES DIMENSIONING

GENERAL FEATURES - ------------------------------------- 04SYSTEM OVERVIEW ------------------------------------------ 06IPCS SYSTEM - -------------------------------------------------------- 16NFC TRACKING SYSTEM - -------------------------------- 22

CONTENTS

SIZE & RATING

GENERAL FEATURES

FEATURES AND BENEFITS

> Modular and compact, space-saving design, easy

assembly and safe onsite cubicle reconfiguration

without de-energising the busbar

> Suitable for all Power Distribution and Motor

Control applications

> Seamless integration with upstream control and mon-

itoring systems

> Quick and easy installation

> Focus on quality, safety and reliability

> Flexibility during the design phase and high lev-

el of versatility

> Compliant with the most stringent Oil & Gas stand-

ards (Shell DEP)

SKEMA HAS BEEN AT THE FORE-

FRONT OF INNOVATIVE LOW VOLTAGE

SWITCHGEAR SYSTEMS FOR OVER

40 YEARS. THROUGH OUR COMMIT-

MENT TO THE HIGHEST STANDARDS

OF PRODUCT DEVELOPMENT, MAN-

UFACTURING, TESTING AND AFTER-

SALES SUPPORT, OUR CUSTOMERS

HAVE FOUND THAT PARTNERING WITH

SKEMA PROVIDES THEM WITH UNRI-

VALLED SERVICE, RELIABILITY AND

PEACE OF MIND.

Skema’s IN-CHARGE switchgear is a

flexible modular system offering both

fixed and withdrawable configurations

for powering, controlling and protect-

ing low voltage feeders and motors. It is

particularly suited to applications that

demand high levels of performance

and reliability, and thanks to its ver-

satility, it can easily be adapted to suit

any plant configuration, electrical lay-

out or onsite installation requirement.

The wide range of sections and the

availability of different versions (af-

fording both front and rear access,

top or bottom cable entry) allow

Skema’s IN-CHARGE switchgear to

offer solutions with a view to sat-

isfying any set of requirements in

terms of installation and space.

Switching operations, as well as

access and routine maintenance,

can be carried out without com-

promising the safety of person-

nel and without any danger of ac-

cidental contact with live parts.

APPLICATIONS

Thanks to its versatility and integrity,

Skema’s IN-CHARGE switchgear can

be utilized in any Oil & Gas/petrochem-

ical application including onshore,

offshore platforms, FPSO, FLNG,

power generation plants or industri-

al plants, or wherever the following

characteristics are essential:

> Personnel safety

> Flexibility and continuity of service

> Reliability

> Low level of maintenance

> Easy installation and connection

> Possibility for extensions and

modifications

> Integration with upstream control

and monitoring systems

CERTIFICATES AND TESTS

> Main standards: IEC 61439, IEC

61641, IEC 60529, IEC 60255

> Designed for safety, fully verified

assemblies to IEC 61439

> Internal Arc Containment (IAC)

tested to IEC 61641

> Tested for seismic load to IEC

60068-3-3

> Vibration tested to IEC 60068-2-6

06 07

TECHNICAL FEATURES

Design Standard IEC 61439

Rated insulation voltage (Ui) 1000 V

Rated operating voltage (Ue) Up to 690 V

Rated Frequency (fn) 50/60 Hz

Rated current (In)

Main busbars up to 5000 A

Distribution busbars up to 3200 A

MCC distribution busbars 630 A / 1250 A

Rated short-time withstand current for 1 sec. (Icw) Up to 100 kA

Rated peak withstand current (Ipk) Up to 220 kA

Arc Fault containment to IEC 61641 Up to 690 V, up to 80 kA, up to 500 ms

Ambient operating temperature 35/40°C. Up to 55°C with derating

Degree of protection to IEC 60529

External enclosure IP31 / IP42 / IP43

Internal between compartments IP2X / IP4X

Segregation Formto IEC 61439-2 form 4a / 4b

to BS EN 61439-2 form 4b Type 6 / 7

Seismic Load Level AF5 elevation factor 2 (ax, ay = 1g - az = 0.5g)

Cable/Busduct Entry Bottom or top

Impulse withstand voltage (Uimp) 6 kV

Overvoltage category III / IV

Pollution degree Industrial - 3

Rated Diversity Factor (RDF) 1 Unity

Busbar insulation Fully insulated

Dimensions

Width 600, 800, 900, 1200,1400 mm

Height 2000 / 2365 mm

Depth 590, 840, 1035, 1385, 1510 mm

Configurations options Front access, back-to-back, rear access options

Painting Standard paint finish light grey (RAL 7035), any color on request

SYSTEM OVERVIEW

0908

BUSBAR SYSTEM

11

MAIN BUSBARS

> Standard design ensures low probability of inter-

nal arc faults through the use of high-performance

busbar supports and oversized creepage/clearance

distances. Optional arc propagation barriers can be

installed between cubicles to limit the spread of

arcs in the unlikely event of an internal arc fault.

Busbar systems have been arc fault containment

tested in accordance with IEC 61641

> Available in ratings up to 5000 A, 100 kA RMS fault

withstand capability and 220 kA peak withstand ca-

pability

> All busbar are made from HDHC copper and can be

finished in plain copper, tin-plated, silver-plated,

nickel-plated or fully insulated

MCC RISER BUSBARS

> HDHC copper riser bars are round in cross section

for high through fault withstand capability and are

tin-plated for low contact resistance plus high me-

chanical endurance at the connection point of with-

drawable chassis

> An IP2X insulated barrier segregates the riser bar

from the MCC equipment bay and allows connec-

tion to the riser bar at 76 mm intervals

> Optional IP4X lockable automatic shutters can be

fitted for enhanced segregation and safety

> Standard riser bars have been arc fault containment

tested in accordance with IEC 61641 and are des-

ignated as an ‘arc proof zone’

1110

WITHDRAWABLE CHASSIS POSITIONS

POWER & CONTROL STABS

POWER CIRCUIT CONTROL CIRCUIT

Connected – Isolated position Connected Isolated Isolated

Connected – Energized posi-tion Connected Energized Energized

Connected – Test position Connected Isolated Energized

Disconnected – Isolated posi-tion Isolated Isolated Isolated

FUNCTIONAL UNITS

> Withdrawable chassis. Available up to 600 mm

high and rated up to 280 A/160 kW, withdrawa-

ble chassis can be configured as motor start-

ers, feeders or contactor feeders. Withdrawa-

ble chassis have three physical positions within

the MCC: connected, disconnected and withdrawn

> ACB Incomers/Feeders. Rated up to 5000 A. Avail-

able for incomers, feeders or bus ties, in ACB config-

urations, all major equipment brands may be installed

> Fixed starters and feeders. Available up to 1200

mm high and rated up to 630 A/300 kW, fixed cubi-

cles can be used (fixed MCC type) in substitution for

withdrawable chassis or together with them (stand-

ard MCC type). Fixed cubicles can be configured as

starters, feeders or contactor feeders

> VSDs, Soft Starter. Available for all MCCs configu-

rations type, cubicles equipped with VSDs, Soft Start-

ers or similar are available up to 55kW

1312

FORM 4B SEGREGATIONIMM STARTER

AUTOMATIC LOCKABLE SHUTTERS

ON THE RISER BUSBAR

TEST POSITION

FLAPS FOR ARC OVERPRESSURE EVACUATION

MODULAR STRUCTURE

IP4X BETWEEN COMPARTMENTS

FULLY INSULATED MAIN BUSBAR SYSTEM

HALOGEN FREE MATERIAL

OUTLET PLIERS BLOCK

RISER BUSBAR ARC BARRI-ERS BETWEEN CUBICLES

OUTLET PROTECTION BOX(FORM 4B SEGREGATION)

OUTPUT BUSBAR CABLE COMPARTMENT

LARGE STEEL, BRASS OR ALUMINUM

GLAND PLATES

CABLE ALLEY 300/400 MM

FORM 4B SEGREGATION

CIRCUIT BREAKER

CIRCUIT BREAKER CONTROL MECHANISM

CONTACTOR

POWER SUPPLY PLIERS

FIXED CUBICLE

HINGED DOOR

CIRCUIT BREAKER

UPPER PROTECTION

HOT DIP COATED WITH ALUZINK

POWER BUSBAR

CT

DROPPERS INSULATING SYSTEM

ERROR PROOF SYSTEM

AVAILABLE AS TOP AND/OR BOTTOM

CABLE ENTRY

WITHDRAWABLECUBICLE

IPCS SYSTEM

SKEMA’S INTEGRATED PROTECTION

AND CONTROL SYSTEM (IPCS) IS A

COMBINATION OF SOFTWARE AND

HARDWARE TO CONTROL AND SU-

PERVISE THE ELECTRICAL POWER

GENERATION AND THE DISTRIBUTION

PLANT. THE IPCS MONITORS AND

SUPERVISES THE STATUS OF EVERY

INCOMER AND FEEDER (FOR MV AND

LV SWITCHBOARDS) THROUGH THE

INTELLIGENT IPCD RELAYS. THE IPCD

SIGNALS ARE COLLECTED AND MAN-

AGED BY THE RTU.

The RTU, connected to the LMS/DMS

LAN and/or through the DCS LAN, ex-

changes information with the control

room. An operator can monitor and

supervise the system connecting with

a PC to the RTU or directly to LMS/

DMS Ethernet LAN.

Developed to comply with the most

stringent Oil & Gas Industry stand-

ards, Skema’s IPCS:

> Integrates the functionalities of

Shell DEP 33.67.01.31 (IMCS)

and DEP 33.64.10.32 (ENMCS)

> Controls all network components

at all voltage levels

> Interfaces with the process con-

trol system (DCS) in order to

match the electrical supply to the

processing requirements

> Compiles and analyzes data on

the performance and mainte-

nance of the electrical network

> Supplies data to higher-level sys-

tems to allow for the evaluation of

the overall plant key performance

indexes

> The integration of process and

electrical data permits to calcu-

late plant indexes and present a

plant dashboard related to avail-

ability, performance, profitability

SERVER CLUSTER - PCTCP/IP

SERVER - PCTCP/IP

PC - PANEL PCIEC 61850 IEC 104MODBUS/TCP

ICU - CCU - RTU PLC FROM/TO DCSIEC 61850 IEC 60870-5-101/3/4MODBUS/TCP/RTU DNP3 PROFIBUS

CONTROL UNITSIPCD - IED

DATA

FLO

W

SUBSTATION

MOTOR STARTER

MOTOR STARTER

MOTOR STARTER

MOTOR STARTER

MOTOR STARTER

MOTOR STARTER

FEEDER

FEEDER

FEEDER

MOTOR CONTROL CENTER

MOTOR CONTROL CENTER

POWER CENTERMOTOR CONTROL

CENTER

SUBSTATION SUBSTATION

MV SWITCHBOARD/ POWER CENTER

MV SWITCHBOARD/ POWER CENTER

ENTERPRISE

PLANT PLANT PLANT

THE OPERATOR INTERFACES

THE OPERATOR INTERFACES ARE IN-

STALLED IN DIFFERENT LOCATIONS

AROUND THE PLANT AND THEY

SERVE TO:

> Display live synopsis of switch-

boards and systems that are part

of the electrical network

> Display alarms and trends of real-

time and historic measurements

> Display IED details, allowing the

operator (where permitted) to

change the IED parameters

> Display sequence of events (SOE)

and disturbance recordings made

in case of trips

> Allow the operator (where per-

mitted) to change functional

parameters

> Allow the operation managers to

analyze performance, cost, relia-

bility and power quality

The Human-Machine Interfaces are

implemented across various levels:

> Operator control panel for intelli-

gent Power Motor Control Center

> Operator monitoring and control

interface for electrical cabins and

substations

> Operator workstations installed

in the Control Rooms to manage

all the functions of the electrical

network

SYSTEM INTERFACES

2120

THE INTERFACE CONTROL UNITS

The Interface Control Units (ICUs) are installed in each (and every) substations of the plant. They serve to:

> Communicate with IEDs and other systems (TG/EDG UCPs, UPS, HVAC) via IEC 61850, Modbus, IEC 101/104, DNP3,PROFIBUS, OPC, etc.

> Store and forward data in case of temporary network faults

> Allow for local connection of an operator workstation

> Perform substation automation (black-start, normal to emergency switchover, etc.) via communication and H/W’d IOs

> Operate as gateways for information and commands between the DCS and upper levels of IENMCS and IEDs

> Allow for intercommunication between devices and systems using different protocols

23

LEGEND CPU - Central Processing Unit

ETH - Ethernet port @100 Mb/s full duplex

COP - Coprocessor 3 serial ports

CNET - Redundant Network interface

LSS - Load Shedding System

I/O - Digital and analogue I/O boards

IED - Intelligent electronic device

DCS - Optional local connection to DCS

via Modbus

ICU CABINET

LAPTOP

GPS

To servers in Control Room and to other substations via different media and protocols

MASTER CPU BACKUP CPU

REDUNDANT NETWORK

MASTER COPROCESSOR(S)

SWITCHGEAR #N

SWITCHGEAR #1

SWITCHGEAR #1

LINE 3

LINE 2

LINE 1

Up to 12 IED using Modbus

BACKUP COPROCESSOR(S)

IEC 61850

HUMAN-MACHINE INTERFACES

IED

H/W LSS SIGNALS

IED

IED

IED

IED

IED

CPU RED ETH C NET CPU RED ETH C NET

DATA SWITCH Et1

DATA SWITCH Et2

IED

232/485

232/485

232/485

232/485

232/485

232/485

1 2 3 3 2 11 2 3 3 2 1

HIGH SPEED SYNC

DCS

DCS

I/0 I/0 COPC NET COP I/0 I/0 COPC NET COP

23

NFC TRACKING SYSTEM

THE NEAR FIELD COMMUNICATION

(NFC) IS A SET OF STANDARDS FOR

SMARTPHONES, TABLETS AND SIMI-

LAR DEVICES TO ESTABLISH RADIO

COMMUNICATION WITH EACH OTHER

BY BRINGING THEM INTO PROXIMITY.

THIS TECHNOLOGY, IF ASSOCIATED

TO THE INTERNET, REPRESENTS A

VERY POWERFUL TOOL TO IMPROVE

THE QUALITY AND THE EASY ACCESS

OF INFORMATION.

THE APPLICATION

TO SKEMA’S PRODUCTS

The objectives of the NFC technology

applied to Skema’s switchgear are:

> To have all the documentation

available on the tablet (SLDs,

layouts, as built documentation,

technical manuals, etc.) through

the reading of the NFC tags po-

sitioned on the switchgear, and

the possibility to refresh the doc-

umentation when updates are

made

> To track and monitor the main-

tenance activities performed on

the switchgear

> To manage a l l the infor-

ma t ion above th rough a

JWSW-Oracle platform via web

ADVANTAGES FOR THE CLIENT

> Technical documentation avail-

able on site with a “click” on a

portable tablet

> Easy download and upload of last

drawings revisions on the tablet

> Tracking of all maintenance ac-

tivities

> Access via web to the history and

the localization of the switchgear

> Real time visibility and enhance-

ment of the quality of the infor-

mation

> Reducing the possibility of human

mistakes

> Possibility to manage ticketing re-

quests

> Requests of services online

> Reduced time leads for mainte-

nance activities

> More efficient and less expensive

maintenance activities

> Enhancing safety, security and

performance

> Total service, Customer is King!

JSWS & ORACLE

CLIENT HAS ACCESS VIA WEB TO THE INFORMATION

TAG = information and

updates

DEDICATED APP on the tablet reads the TAG and the

info on JWSW platform

SAP ALFRESCO

2524

© Skema Milan - Italy

SIZE & RATING

BOTTOM CABLE ENTRY

A

SECTIONBUS

TRANSITION

WIDTH (mm)

DEPTH (mm)

WIDTH (mm)

1600 800 630 /

2000 800 630 /

2500 900 880 /

3200 900 880 /

1600 800 630 300

2000 800 630 400

2500 900 880 400

3200 900 880 400

TOP CABLE ENTRY

A

SECTIONBUS

TRANSITION

WIDTH (mm)

DEPTH (mm)

WIDTH (mm)

INCO

MER

1600 800 630 300

2000 800 630 400

2500 900 880 400

3200 900 880 400

BUS

TIE

1600 800 630 /

2000 800 630 /

2500 900 880 /

3200 900 880 /

FRONT ACCESS

DIMENSIONS & SIZING DATA ACB UNITS / INC/BUS TIE DIMENSIONING

INCO

MER

BUS

TIE

REAR ACCESS

AIR CIRCUIT BREAKERS

A

SECTION

WIDTH (mm) 3P

WIDTH (mm) 4P

DEPTH (mm)

1600 800 900 1385

2000 800 900 1385

2500 800 900 1385

3200 1200 1400 1385

4000 1200 1400 1510

5000 1200 1400 1510

DIMENSIONS & SIZING DATA FIXED UNITS /

INC/BUS TIE DIMENSIONING

DOWNLOAD OUR “SKEMAQ DIMENSIONG”

SOFTWARE HERE!

http://www.skemaq.it/en/products- and-services/skemaq-dimensioning

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