S U B S T A T I O N S

D.C. Switchgear RangeType SECUB-2

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D.C. SWITCHGEAR RANGE / TYPE SECUB-2

With a complete range of equipment and a leading expertise in DC traction power substations, Sécheron SA is a world leader and major partner for electrification of DC traction networks. Covering all activities from calculation, network design and engineering, up to the production of the DC Systems, Sécheron SA can offer customers and partners tailor made solutions based on a modular concept and standard products.

Our equipment is developed on world leading technology and proven worldwide design and acceptance. In-house technology covers all key devices applied in the DC Systems (Rectifiers, DC HSCB, Disconnect Switches, Protection Relays, Measuring Amplifiers, etc.).

The SECUB-2 cubicle is a compact DC switchgear solution designed for DC traction substations powering light transportation systems such as tramways, LRT, trolleybuses, monorails and LIM.

SECUB-2 completes the range of Sécheron DC switchgear that covers heavy duty transportation systems.

SECUB-2 is the improved evolution of the SECUB which has widely been installed in various networks since more than 10 years.

• Rated current up to 2400 A (main circuit)

• Rated voltage up to 900 VDC

• Metal enclosed switchgear compartment equipped with high-speed circuit-breaker

• Bi-directional current interruption

• Rated short-circuit current up to 100 kA (150 kA peak)

• Equipped with a high-performance Protection and Control Relay type SEPCOS

• Strong, compact and durable cubicle

• Modular construction

• Limited and easy maintenance

• Designed according to EN50123 and IEC61992 standards

New features:

• Possibility to integrate a disconnecting switch in the rear compartment

• Access from the front of the cubicle after having fully removed the drawer

A domain of expertise

SECUB-2: D.C. Switchgear for light rail applications

Main features

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The metal enclosed compartmented DC switchgear type SECUB-2 integrates three separated compartments for high and low voltage equipment:

• Low voltage compartment including protection and control devices

• High-speed circuit-breaker compartment

• Rear high voltage busbar compartment including optional disconnecting switch

Protection and control compartment

Accessible from the front of the cubicle, the low voltage compartment includes the protection and control relay SEPCOS, the low voltage equipment (MCBs, relays, etc.).

High speed circuit breaker compartment

The HV compartment includes the high-speed circuit-breaker which is mounted on a withdrawable drawer.

The drawer can be easily withdrawn from the cubicle.

The HSCB is connected to the auxiliary circuits thanks to an unpluggable multiple connector and the breaker is connected to the high-voltage busbars by power finger connectors.

The unlocking mechanism of the door ensures a trip of the HSCB before opening.

Behind this door, a polycarbonate protecting screen ensures the security of personel and prevent contact with live parts.

With the door open, the drawer can be drawn in or out with a handle located on the drawer frame (linked to a locking system).

When the drawer has been drawn out, it can be easily placed on a trolley allowing easy maintenance operations and access inside the cubicle.

The withdrawable circuit breaker drawer has four different positions:

• Service

• Test

• Disconnected

• Removed

It is possible to see the physical state of the HSCB (opened or closed) as well as the drawer position (service, test or disconnected) through a window located on the front door. A counter showing the number of HSCB operations is also visible through this window.

The drawer also contains a measuring shunt. The isolated amplifiers for current (MIU10) and voltage (VM10) measurement as well as the line test components are mounted on a retractable plate located below the drawer.

With the plate removed, the power cable connection compartment is easily accessible inside the cubicle. This feature makes the installation against the wall possible.

This compartment is separated from the busbar compartment thanks to isolating shutters.

Rear high voltage busbar compartment

The busbar rear compartment is composed of two main parts:

• Main incoming busbar

• Connection for outgoing cables, copper bars are provided to connect the power cable to the third rail or the catenary

• As an option, an off load disconnecting switch can be mounted to insure the by-pass or line isolating function

Description

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D.C. SWITCHGEAR RANGE / TYPE SECUB-2

Symbol Unit

Cubicle type SECUB-2 UR15 SECUB-2 UR26

Rated service current INe [A] 1500 A 2600 A

Rated voltage UNe [VDC] 900 900

Rated insulation voltage Unm [VDC] 1800 1800

Nominal voltage Un [VDC] 600/750 600/750

Power frequency withstand voltage Ua [kV] 6.9 kV, 50 Hz, 1min

Rated service current main busbar [A] 2400 2400/4000*

Rated short-circuit current INss/ÎNss [kA] 12/18 100/150

Protection degree (doors and walls) IP30

Protection degree (roof) IP20 / IP32** / IP42**

Ambient temperature range T [°C] -5 ... +40

Typical weight (without disconnector) [kg] 330 350

Dimensions (WxDxH) [mm] 450x1400x2200

*4000 A: option.**IP32 / IP42: option.

Designed according to standard specifications EN50123 and IEC61992.

Unique feature:Key components of the switchgear are designed and manufactured by Sécheron and are fully compatible.

Main technical data

Composition

UR26.81SHigh-speed circuit breaker

MIU10Isolated amplifier for

Current Measurement

VM10Isolated amplifier for

Voltage Measurement

SWS18.20Disconnecting Switch

SEPCOSProtection relay

SEPCOSTouch-screen display

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1. Circuit-breaker

2. Withdrawable breaker drawer

3. Low-voltage compartment (protection and control circuits)

4. Main plugs (power circuit)

5. Shunt (current)

6. Current measuring amplifier

7. Voltage measuring amplifier

8. Busbar compartment

9. Output cable

10.Bypass busbar (option)

11.Disconnecting Switch (option)

12.Main busbar

Main dimensions

1430

1400

100

1

2

11

10

8

3

7

4

5

69

450

2200

325

12

1075

Main configurations:

1. Line feeder

2. Line feeder with isolating switch

3. Line feeder with earthing switch

4. Rectifier breaker

5. Line feeder with bypass

SECUB-2 HSCB Cubicle: Main applications

1 2 3

4 5

Line

Tes

t

SEPCOS

MAIN BUSBAR

E

I >

I

MIU10

U

VM10

Line

Tes

t

SEPCOS

MAIN BUSBAR

E

M

I >

I

MIU10

U

VM10

Line

Tes

t

SEPCOS

MAIN BUSBAR

E

I >

I

MIU10

U

VM10

SEPCOS

MAIN BUSBAR

E

I >

I

MIU10

Line

Tes

t

SEPCOS

MAIN BUSBAR

BY-PASS BUSBAR

E

I >

I

MIU10

U

VM10

M

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D.C. SWITCHGEAR RANGE / TYPE SECUB-2

SEPCOS is a protection and control unit that is applied to the outgoing feeder or the incoming HSCB cubicles in the DC traction substation.

Main features:• Modular PLC concept, PLC programming, IEC61131 normalized

programming.• Fully approved in railway substation environment IEC60255-22.• High noise immunity thanks to sampling rate at 40 microseconds and 16

bits A-D converter.

Protection functions:• All typical protection functions (e.g. Function DDL +/-, Imax +/-, etc.).

Control functions:• HSCB ON / OFF control.• Intertripping, automatic reclosing, anti-pumping, line test function.• External synchronization of the PLC, measurement supervisor control.

Open to all customer network and protocols:• TCP/IP: MODBUS-TCP• Specific TCP/IP based power distribution protocols:

- IEC60870-5-104 - DNP3- IEC61850

• Fieldbus: MODBUS-RTU, Profibus DP

Sécheron provides complete DC substations systems including:• Transformer-rectifier group• Inverter group for energy recovery• Energy storage systems• DC switchgear including:

- DC HSCB cubicles- Disconnector cubicles- Contactor cubicles

• Voltage limiting devices• Protection and control systems• Human Machine Interfaces

Sécheron also provides services in order to support customers in network design and installation of our systems:• DC System Engineering• Dynamic simulation of complete networks• Short-circuit, earthing circuit and harmonic calculation• Supervision of installation and commissioning• In line and field testing

SEPCOS Control and Protection Relay

Products and Services

SEPCOS in the low-voltage compartment

All functions are available through a web server (S-Web), including visualization of trends.

The SEPCOS may be controlled and parametrized through a user friendly 7” color touch screen display which

is located on the front door of the cubicle.

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With years of experience in the field of traction rectifiers, today proposes a cubicle which integrates both functions of rectifier and isolating switch. This cubicle is normally used combined with the SECUB-2.

It is a compact solution for LRT’s substation building and reserves ample space for convenient maintenance operation.

Example of Rectifier+AIS cubicle delivered for a tramway substation:

Side view of Rectifier+AIS cubicle (right side)

Full compact lightrail solution

Special application for Depots with double UR15

Reverse current detection

RC FilterCombined with

base-load resistor

Power Diode BlocksDiodes fitted in heatsinks combinedwith snubbers and optional fuses

SWS / SWGBipolar off-load motorized disconnecting switch with

optional earthing connection

IPTOptional interphase coil

for connection withcoupled rectifier transformers

MIU 10 / VM 10/12Isolated amplifiers for current

and voltage measurement

Voltage Limiting DeviceOptional negative-earth voltage

threshold relay

Frame leakage detectionFrame-earth current

threshold relay

Technical data:

Symbol UnitRated service current INe [A] Up to 1600 ARated power P [W] Up to 1200 kWRated voltage UNe [VDC] 900Rated insulation voltage Unm [VDC] 1800Nominal voltage Un [VDC] 600/750Power frequency withstand voltage Ua [kV] 6.9 kV, 50 Hz, 1minOutput signal 6 or 12 pulsesConnection scheme 1 or 2 Graetz bridges in parallelProtection degree (basic) IP20Ambient temperature range T [°C] -5 ... +40Typical weight (without disconnector) [kg] 950Dimensions (WxDxH) [mm] 1600x1400x2200Cooling Natural Air

Sécheron SA Rue du Pré-Bouvier 251217 Meyrin - GenevaCH-Switzerland

Tel: +41 (0)22 739 41 11Fax: +41 (0)22 739 48 11substations@secheron.comwww.secheron.com

This document is not contractual and contains information corresponding to the level of technology at the date of printing. Sécheron reserves the right to modify and/or improve the product, whose characteristics are described in these documents, as required by new technology at any time. It is the purchaser’s responsibility to inform himself, no matter what the circumstances, of the product’s

maintenance conditions and requirements. Sécheron reserves all rights, especially those arising from our “General Delivery Conditions”.

Copyright© 2007 Sécheron SA

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The SECUB-2 has been successfully type tested at IPH laboratory in Berlin.

According to standards: • IEC61992-2:2006• EN50123-2:2003

Approved type test reports available.

Rated voltage (UNe) 900 VDC

Rated insulation voltage 1800 VDC

Rated service current (INe) 2600 ARated making & breaking capacity (ÎNss/INss) 100/150 kARated track time constant (TNc) 31.5 msDuty classes f, e, d

Standards

Main features related to SECUB-2 breaker cubicle