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 [email protected]
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
SG
8207
94B
EN
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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