DCAP-5000 Feeder Line Protecting Unit

Application:

DCAP-5000 feeder line protection unit, which is based on 32-bit DSP (Digital Signal Processing) and high-speed Ethernet communication technology, is mainly used to protect and control the feeder line whose voltage degree is between 6.3kV and 66kV.

Main Function:

(1)      Protective Functions

• Instantaneous over-current protection (it is subject to the criterions of direction and complex voltage)

• Two-stage definite time over-current protection (it is subject to the criterions of direction and complex voltage)

• Instantaneous under-voltage protection

• Under-voltage protection (it is subject to TV fault blocking )

• Over-voltage protection

• Two-stage zero-sequence over-current protection

• Zero-sequence over-voltage protection

• Auto re-closing (with post-accelerated protection)

• Low frequency unloading

• Charging protection

• Overload alarm

• Checking synchronization and checking no-voltage

• TV and TA fault alarms

• Control circuit fault alarm

• Four programmable logic control outputs (PLC1,PLC2,PLC3,PLC4)

(2)      12 digital inputs, 10 AC analog inputs, 1 DC analog input, 8 digital outputs.

(3)      Faults wave recording (the largest recording duration is 20s)

(4)      Time-adjust: software setting or GPS impulse setting

(5)      The unit can save the latest 40 alarm records after an auxiliary power supply fault.

(6)      The unit has one RS-485 communication interface and one Ethernet communication interface that are convenient to accomplish dual-network communication system.