Anhui Mingge Electric Co., Ltd.

Product introduction

PK series microcomputer protection measurement and control panels are used in transformer (distribution) stations with voltage levels of 35kV and below. They provide intelligent, networked measurement, protection and control functions for high-voltage equipment in the station. At the same time, they communicate in real time with the superior master station to achieve comprehensive automation of the transformer (distribution) station.

Model meaning

It uses an ultra-high-speed dual CPU system to work in parallel and has powerful functions. All measurement, control and protection units of this product use the 80C196 chip launched by Intel, which is twice as fast as 8096. The chip itself contains all peripheral circuits, and the hardware design is extremely simplified, integrating protection, control, measurement, communication and other functions.

Full COMS industrial-grade preferred chip, the entire screen has low power consumption. All integrated circuits of this product use industrial-grade COMS chips, which greatly reduces power consumption. At the same time, the system noise tolerance is greatly improved, and the anti-interference ability is enhanced.

Highly reliable design, resistant to harsh environments, and in line with IEC international standards. This product is specially designed to withstand strong magnetic interference, with reliable contact between components and connectors. It is resistant to impact and vibration, has a wide working environment temperature range, and its insulation, voltage resistance, impact, and resistance to high-frequency interference are in line with IEC international standards.

The communication network is high-speed and reliable, and all devices on the network do not affect each other. This product uses a dedicated RS-485 network communication chip, which has strong fault tolerance and high reliability. It also adopts photoelectric isolation measures to fully ensure the safety of all devices on the network. Each interface itself also has a self-test system to facilitate rapid repair of faults on the public network.

Technical parameters

Sampling rating: voltage 100V/50Hz; current 5~50A.

Working power supply voltage: 110V/220VDC

Power consumption: DC power consumption is 10W normally; AC power consumption is 15W during operation, current loop \"0.75VA/phase; voltage loop 0.5VA/phase\".

Phase load characteristics: long-term connection of the current loop is 20A; timely connection is 100M1s; instantaneous connection is 500T20ms; 1.5 times the long-term operating rating of the voltage loop.

Contact capacity: long-term connection 5A/220A/DC.

Switching input: 20V/5mA, isolation withstand voltage 2000V.

Measurement accuracy: Current measurement accuracy: 0.1A~64A is 0.5%, 6A~100A is 2%;

Voltage measurement accuracy: range 0V, 60V-120V is 0.5%;

Power measurement accuracy: 10%; Electricity measurement accuracy: (internal calculation) 10%, external pulse depends on the accuracy of the pulse meter. Protection delay accuracy: 0.1s~20.00s delay error is not greater than 25% or 25%, whichever is greater;

Communication interface: RS-485, rate 9600Mbps.

Insulation resistance complies with: IEC255-5 standard, greater than 100MΩ/500V.

The withstand voltage test is based on IEC255 standard, 2.0KV/50Hz.

Anti-interference: common mode 25kV/1MHz/2S, differential mode 10kV/1MHz/2S.

System configuration diagram