►Product Overview

The CKPM301 microcomputer protection device uses a highly integrated, bus-free microprocessor to process signals from current and voltage transformers, and controls the output of the device through digital logic operations. The device has a compact structure, a sealed chassis, a maintenance-free design, and good anti-interference performance. It is very suitable for ring network cabinet systems with relatively harsh operating environments and limited installation locations.

The CKPM301-S microcomputer protection device is a waterproof distribution network automation terminal with a protection level of IP67. It is mainly developed for relatively humid and condensation-prone installation environments. On the basis of the functions equipped by ordinary microcomputer protection devices, it also has multi-electric measurement, remote control, remote signaling and other monitoring functions. The waterproof microcomputer protection device uses a highly integrated, bus-free microprocessor to process signals from current and voltage transformers, and controls the output of the device through digital logic operations. The device has a compact structure, a sealed chassis, a maintenance-free design, good anti-interference performance, cable wiring, and can operate normally underwater.

►Product Features

Stable performance: The whole machine adopts extremely low power consumption design technology to ensure that the protection function can be started reliably and quickly under any conditions. High-precision components and processes ensure the accuracy, reliability and long service life of the device.

Simple structure: The device has a simple and compact structure, convenient and flexible installation, and is suitable for the compact installation conditions of the ring network cabinet.

Flexible configuration: The protection configuration is flexible and complete, and various protection functions can be activated and deactivated through software; RS-232 and RS-485 communication bus interfaces are provided, and open communication protocols are provided to users to facilitate the implementation of SCADA.

Stable performance: Phase-to-phase inverse time overcurrent protection and zero-sequence inverse time overcurrent protection are selected with five IEC standard inverse time curves.

Comprehensive measurement and control: It has complete measurement and control functions, and can measure electrical parameters such as voltage and current; it provides a special remote control relay to realize remote control functions; it has 6-way switch input circuits.

LCD interface: It adopts a full Chinese LCD display interface, multi-layer menu display, and the human-machine interface is extremely friendly.

Historical data: The device's large-capacity non-volatile memory ensures that 600 historical events are recorded, with detailed content and no data loss during power failure.

Dynamic and static self-test: The device has a complete dynamic and static self-test function, which monitors the working conditions of each part of the device online to ensure the working reliability of the device.

►Technical Parameters:

1. Three working power supplies are available, including 85-265VAC, 100-264VDC, 24VDC, and 48VDC.
2. It has 6 switch input circuits.
3. Sampling accuracy: voltage <0.5%, current <0.5%, zero-sequence voltage <0.5%, zero-sequence current <0.01A
4. Remote signal resolution: ≤1ms, anti-shake 1~99999ms.
5. Communication interface: 1 RS232, 1 RS485.
6. Communication protocol: Modbus, IEC103, 101-PH, IEC101, Auto, Prt-TX, Prt-RX, CK301.
7. Overload capacity: Current loop long-term operation------2In
10s--------------10In
1s----------------20In
8. AC voltage: 100V or 220V
AC current: 5A or 1A
Frequency: 50Hz
9. Operating temperature: -40°C—70°C
Storage temperature: -50°C—85°C
Relative humidity: 5% ~95%
Atmospheric pressure: 70 KPa~ 110KPa
Altitude: not more than 4000m