NSCD Negative Short Circuiting Device
Product Number:
8800488-V02
The Negative Short Circuit Device 2kA (NSCD) provides a short-circuit path between the DC Traction Supply and the Negative Return to protect against the inadvertent re-energisation of the circuit. The NSCD can be operated remotely via a SCADA Interface, locally via a Local Control Panel and at the NSCD itself for maintenance. The NSCD consists of a motorised 3.2kA Disconnector to provide the short-circuit path, a manual 2.5kA Disconnector to isolate the motorised Disconnector for maintenance, panel lighting and anti-condensation heating, and the associated control equipment. Both Disconnectors are off-load devices so voltage monitoring is included to give indication that the DC Traction Supply is live and to inhibit inadvertent operation of the motorised Disconnector.
Applications:
Combined Assemblies & Frames (CA),
Approvals:
NR approved,
Key Features
- 100mm Electrical Clearance
- Fully Isolated 110VAC / 50VDC Control Supply
- Padlock Facilities
Product Specifications:
| On / Off load | Off Load |
|---|---|
| System Voltage | 750V |
| Rated Voltage | 1000V |
| Normal Current | 2500A |
| Peak Current | 10000A |
| Withstand Current | 4800A |
| Short Circuit Capacity | 63000A |
| Length | 1000mm |
| Depth | 420mm |
| Height | 1940mm |
| Weight | 175kg |
Component Product
Switch 1
3.2kA, single pole, motorised off load/ fault make switch.
Switch 2
2.5kA, 2 pole manual off load switch (for maintenance isolation)
Construction
Core specs
Enclosure Type: GRP
IP Rating: IP56
Construction:
- Heavy duty GRP cabinets
- Hot Press Moulded, Reinforced Polyester RAL 7032
- Protected for external use
- Complies with general requirements for empty enclosures conforming to EN 62208: 2003 (EN 50298: 1999).
- Resistance to external mechanical impact: IK 10 (5 joules) conforming to EN 50 102.
- External & Internal Colour - RAL 7032 Grey
- IP 56 sealing conforming to IEC 529 (EN 60529)
- Self-extinguishing conforming to IEC 695-2-1 (960 °C)
- Temperature resistance: – 50...+ 150 °C
- Resistant to principal chemical agents and corrosive atmospheres & UV light stabilised.
- Comply with constraints relating to installation of double insulated panels conforming to standard IEC 439-1 (EN 60439-1)
- Front panel has Network Rail approved 3 point locking with a barrel to suit Network Rail.
- Insulating Gland Plates
Installation:
Frame mounted, the entry of cables is in through the base of the cabinet, via cable glands in the gland plates.
Cabling:
Two 240mm2 or two 500mm2 Positive cables can be connected to the Conductor Rail Lug Up to four 240mm2 Negative cables can be connected to the Running Rails Lug.