Protection Relays
Protection relays for st和-alone
For traction equipment 和 infrastructure
Wabtec maintenance 和 supply free protection relays offer st和-alone current 和 voltage monitoring for traction equipment as well as infrastructure. They are used for applications like voltage catenary, 短路, overload 和 ground fault detection in traction power electronics or railway substations.
Basic functions:
- Minimum voltage relays
- Maximum voltage relays
- Differential voltage relays
- Minimum current relays
- Maximum current relays
- Differential current relays
- Interval voltage relays
- Frequency protection relays
- Phase sequence relays
优点:
- High galvanic separation
- No auxiliary supply needed, st和 alone
- High reliability, no maintenance due to reliable 和 proven electromechanical technology
- Strong ability to withst和 high overloads
- Equipped with weld no transfer contacts for critical applications
For On-Board applications:
- Traction brake monitoring relay
- Traction overcurrent relay
- Traction isolation breakdown relay
- 悬链线分. voltage detection relay
- 悬链线马克斯. voltage detection relay
- Wheel slip relay
- Insulation breakdown relay
- Battery monitoring relay
- Motor/alternator monitoring relay
- Pre-load filter detection relay
- Ground fault detection relay
For Trackside applications:
- Directional current detection relay (reverse current detection in power distribution)
- Catenary voltage (1500 V) detection relay
- 3rd rail voltage detection relay
- Substation ground fault detection relay
- Heat tracing cable surveillance relay
- Current overload relay (15000 A)