KR-3450 High Voltage Transformer Protection and Measurement Device

Introduction to KR-3000 series decentralized protection and measurement device ● It is mainly suitable for decentralized installation of various power supply systems with voltage levels of 35kV and below. The main CPU adopts a 32-bit DSP chip, fully localized LCD display, detailed and intuitive information, easy operation and debugging, and a unified software and hardware platform

KR-3000Introduction to Series Distributed Protection and Measurement Devices

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

●The protection device records protection action events with time information and maintains power-off status. The device integrates functions such as protection, measurement, remote signaling, and remote control. Standard RS-485 and CAN buses are used for communication, making networking economical and convenient. It can directly communicate with monitoring or protection management machines.

●A fully functional circuit breaker circuit, compatible with both AC and DC operations, suitable for controlling various types of circuit breakers.

●This series mainly includes KR-3110 motor protection, KR-3120 motor differential protection, KR-3210 line protection, KR3230 bus tie protection, KR3310 air conditioner protection, and KR-3450 transformer protection.

Main functions

●Three stage overcurrent protection; Two stage zero sequence overcurrent protection

●Overload protection; overvoltage protection

●low voltage protection

●Zero sequence voltage protection

●Non electricity protection; Low cycle protection

●Control circuit disconnection; PT disconnection

●Telemetry, remote signaling, remote control

●One external switch tripping input

●One external switch alarm input

●13 remote signaling inputs; Six central signals

●AC/DC anti bounce circuit; No loss of action records and signal memory in case of power failure

●Remote modification of parameters and fixed values; Back end timing

KR-3450Wiring schematic diagram of high-voltage transformer protection measurement and control device

Note:

1. The device is equipped with an anti bounce circuit and is designed as a voltage division type circuit breaker

2. If a permanent magnet circuit breaker is used for triggering operations, a dedicated operating circuit is required or the protective passive contacts should be directly connected to the circuit breaker circuit