KR-2000Introduction to Series Distributed Protection Devices

●It is mainly suitable for various power supply systems with voltage levels of 35kV and below. The distributed installation protection device CPU adopts a 32-bit DSP main body, fully localized LCD display, detailed and intuitive information, and easy operation and debugging.

●The protection device records protection action events with time information and maintains power-off status. The device integrates protection, measurement, remote signaling, remote control and other functions. The communication adopts standard RS-485, which is economical and convenient for networking and can directly communicate with monitoring or protection management machines.

●This series mainly includes KR-2110 high-voltage motor protection, KR-2210 high-voltage line protection, KR-2230 high-voltage busbar protection, KR-2310 high-voltage capacitor protection, and KR-2410 high-voltage transformer protection.

Main functions

●Motor starting protection, locked rotor protection, three-stage overcurrent protection

●Two stage zero sequence overcurrent protection

●Two stage negative sequence overcurrent protection

●Overvoltage protection; low voltage protection

●Zero sequence voltage protection; Low cycle protection

●Pt wire breakage automatic detection

●Remote signaling and control

●11 channels of remote signaling input acquisition, remote signaling displacement, and accident remote signaling

●2-channel central signal contact

●AC/DC operation anti bounce circuit

●No loss of action records and signal memory in case of power failure

●Non electric protection (used for motor temperature, oil pressure protection, etc.)

KR-2110Wiring schematic diagram of microcomputer motor protection and measurement device

Note:

1. Motors above 2000KV need to be used in conjunction with KR-3120

2. The anti bounce circuit is designed according to the voltage division type circuit breaker

3. If the trigger operated circuit breaker adopts our company's dedicated operation circuit or is directly introduced into the trip circuit

When the 2000 series requires remote control operation, the input terminal 3C needs to be connected to the remote control status variable