Protection relays RFI approved

TF-RP21

Multifunction protection relay for electric traction systems: railways and metro-tramways. Approved by RFI.

Technical features

2 overvoltage levels VM1 and VM2
2 undervoltage levels Vm1 and Vm2
2 current step levels with di/dt dependence IG1 and IG2
2 impedance monitoring levels with di/dt dependence R1 and R2
2 maximum overhead line temperature levels TM>
2 overvoltage with 100 Hz component levels V1001 and V1002
2 forward/reverse/bidirectional programmable overcurrent levels IM1>, IM2>, IM3>, IM4>
High-speed circuit breaker diagnostic relay: no. of mechanical operations, no. of electrical openings, no. of electrical interruptions
1 cable/line thermal image protection level ITM1
2 switchboard or cable earth fault protection levels (64)
1 maximum I²t level
2 maximum current gradient levels G
2 maximum current variation levels