NPMPD
Over Voltage Protection DeviceIn DC traction system impermissible touchvoltage may occur between the return circuit and the struct...
In DC traction system impermissible touchvoltage may occur between the return circuit and the struct...
In DC traction system impermissible touchvoltage may occur between the return circuit and the structure earth due tooperational and short-circuit currents. In this case, a short-circuit devicemust be used as a voltage protection device between the return circuit and thestructure earth, preventing the existence of impermissible touch voltage.
Features
1. Adopt high-performance DC contactor (ora hybrid switch consisting of thyristor and DC contactor parallel connected).It can meet the European standard and safety requirement.
2. Low maintenance due to application ofthyristors.
3. Maximum personnel and equipmentprotection due to fast reaction time.
4. Simple installation, compact design.
5. No commissioning needed before using.
Rated operatioral current | 800A/1250A | ||
Mechanical endurance (time of operation cycle) | 1.5x106 | ||
OPeration frequeney (time of operation cycle per hour) | 120 | ||
Short circuit breaking capacity | 65kA/150ms 50kA/200ms | ||
Voltage monoitoring and reaction time | |||
U> Adjustable scope 25~250V DC | Time | 0.15s-99h | |
U>> Adjustable scope 25~250V DC | Time | 0.1s | |
U>>> Adjustable scope 600V DC±50V DC | Time | <0.0002s | |
Control voltage | 220V AC/DC | ||
Cubicle | Steel plate | ||
Overall dimension (WxDxH) | 600(800)x600x2200mm | ||
Color | RAL 7032/RAL7035 | ||
Protection degree | IP40/IP54 | ||
Weight | 250kg~300kg |