CT Self-spplying
CT Self-supplying direct drive trip coil
Product Overview
The RP-400 TLF unit is a compact, highly reliable CT self-supplying protection device. The unit is particularly ideal for backup protection of circuits where the load is a transformer or motor and the switch is a circuit breaker, or it can be used separately as a primary protection.
RP-400 TLF protection device connects CT secondary current directly to fuses, when short circuit, overcurrent, earthing and other faults occur in the protection zone. The fuses will be reliably burnt according to the inverse time limit action characteristics, and within the device, the CT excitation circuit, which is connected to the CT secondary circuit and consists of capacitor and clamping voltage discharge device, is activated without any delay. Besides, it will provide enough energy to drive the circuit breaker tripping coil to realize the tripping to cut off the faulty circuit.
Main Function Features
Compact structure
Compact structure and fully sealed
Full function
Failure protection on phases and earthing
Convenient operation
Front-loaded fuses for easy installation
Reliable protection
Simplified circuits with reliable protection
Quick setting of rated value
Quickly set the rated protection value
Item Parameter
Item Parameter
Ambient temperature
-40℃～ +70℃；
Relative humility
5%～95%；
Altitude
≤ 2500m；
Insulation resistance
≥500MΩ；
Power frequency withstand voltage
AC2000V/1min；
Installation
Fixed panel installation
Recommendations
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