DCAP-5001/5001S Feeding Transformer Protecting Unit

DCAP-5001 Feeding Transformer Protecting Unit

Application:

DCAP-5001 protection unit, which is based on 32-bit DSP (Digital Signal Processor) and high-speed Ethernet communication technology, is mainly used in feeder transformer.

Main Functions:

(1)      Protective Functions

• Instantaneous over-current protection

• Two-stage definite time over-current protection (with three time delays in each stage)

• Inverse time over-current protection (normal inverse, unusual inverse, extreme inverse)

• Two-stage under-voltage protection(it is subject to TV fault blocking )

• Two-stage zero-sequence over-current protection (with three time delays in each stage )

• Zero-sequence over-current protection on the low-voltage side of the feeder transformer

• Zero-sequence over-voltage protection

• Overload alarm

• TV and TA fault alarms

• Control circuit fault alarm

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

(2)      Auxiliary power supply fault alarm for the unit

(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 even 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.