SAFEBOND 900VDC and 1800VDC, Integrated Track Feeder and Negative Shorting Panel
| Company | BRUSH Power Distribution |
|---|
Images
Description
Specifications
- HV Dc switchgear for DC Traction power supply
- The SafeBond incorporates the NDC high speed, unidirectional circuit breaker, featuring the award-winning magnetic actuator, to carry out the making and breaking of all load and fault currents, whilst an “off-load” motorised two position disconnector selects the circuit.
- With the disconnector in the positive position and the NDC CB closed, the positive busbar is connected to the track feeder cable thereby functioning as a standard feeder circuit breaker.
- With the disconnector in the negative position and the NDC CB closed the track feeder cable is bonded to the negative busbar, thereby functioning as a negative bonding device.
- All operations are fully electrically interlocked and the control system can be operated remotely via SCADA or locally via the local control panel.
- Standards : BSEN 50123 Series
- Environmental Conditions As EN 50123-1 clause 4.1, normal
- Expected service life; 30 years
- Feeder circuit breaker and bonding functions integral to one panel
- Fully rated, type tested and proven NDC circuit breaker does the making and breaking
- Proven ‘off-load’ 2 position disconnector selects the circuit
- Disconnector in positive position – Feeder circuit breaker function D
- Disconnector in negative position – negative bonding function
- Electrical control/interlocking schemes to suit customer requirements
- SCADA Remote control of complete unit as standard
- No additional civil engineering/cabling costs
- No additional outdoor housing costs
| SafeBond Switchgear | |||
| Rated Voltage | V dc | 900 | 1800 |
| Rated Service Current | A | 4000/6000/8000 | 4000/6000 |
| Nominal Voltage | V dc | 750 | 1500 |
| Power-Frequency Withstand Level | kV | 9 | 9 |
| Rated Short-Time Withstand Current | kAp/kA | 100/71 250ms | 100/71 250ms |
| Rated Short-Circuit Current | kAp/kA | 180/125 | 142/100 |
| Insulation Category | OV4 | OV4 | |
| Rated Impulse Withstand | kVp | 20 | 20 |
| Auxiliary Operating Supply | V dc | 48 / 110 / 220 | 48 / 110 / 220 |
| Max and Min Operating Temperature | Deg C | 40 / -5 | 40 / -5 |
| Degree of Pollution | EN50124-1 PD4 | EN50124-1 PD4 | |
| Disconnector | |||
| Rated Service Current – Positive | A | 4000 | 4000 |
| Rated Service Current – Negative | A | 500 | 500 |
| Mechanical Endurance | Number of Operations | 10,000 | 10,000 |
| Nominal Motor Operating Time | s | 10 | 10 |
| Circuit Breaker | |||
| Rated Track Time-Constant | ms | 100 | 63 |
| Bi-directional Critical Current * | A | 25 | 25 |
| Mechanical Endurance | Number of Operations | 50,000 | 50,000 |
| Breaking Characteristic | High Speed | High Speed | |
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