►Product Overview

The CKPM502 Boundary Switch Control Device is primarily developed for the application of distribution network automation terminals in ring main units and centralized cabinet systems. It is particularly suitable for ring main unit systems operating in harsh environments with limited installation space. It features phase current instantaneous cutoff, overcurrent, zero sequence overcurrent protection, reclosing, overvoltage, low voltage protection, non-electric quantity protection alarms, and tripping functions. Additionally, it includes multi-quantity measurement, remote control, and remote signal monitoring functions.

►Product Features

The CKPM502 boundary switch measurement and control device utilizes a highly integrated microprocessor that processes signals from current and voltage transformers without the need for external bus chips, controlling the device's output through digital logic operations. The device features a compact structure, a sealed chassis, and a maintenance-free design with excellent interference immunity, making it highly suitable for ring main unit systems operating in harsh environments with limited installation space. The entire unit employs ultra-low power design technology, ensuring that the protection function can reliably and quickly activate under any conditions.

The device has a simple and compact structure, allowing for convenient and flexible installation, making it ideal for the compact installation conditions of ring main units. The protection configuration is both flexible and comprehensive, allowing various protection functions to be freely enabled or disabled through control words. It features complete measurement and control functions, capable of measuring electrical parameters such as voltage and current. Additionally, it provides dedicated remote control relays to facilitate remote control functionality and includes 8 switch quantity input circuits. The device utilizes a fully Chinese liquid crystal display interface with a multi-layer menu display, making the human-machine interface exceptionally user-friendly. The device's large-capacity non-volatile memory ensures the recording of 200 historical event logs, with detailed content that is preserved even during power outages. The device is equipped with a comprehensive dynamic and static self-check function, which monitors the operational status of various components online, thereby ensuring the reliability of its operation. High precision components and processes ensure the device's accuracy, reliability, and long service life. The device features RS-232 and RS-485 communication bus interfaces, providing users with an open communication protocol to facilitate SCADA functionality.

►Product Specifications

Rated Specifications: AC Voltage (to be specified at the time of order): 100 V or 220 V 
AC Current (to be specified at the time of order): 5 A or 1 A 
Frequency: 50 Hz 
Power Supply (to be specified at the time of order): AC 85 to 264 V 
DC100~264V 
DC 24 V or DC 48 V, ±20%
Overload Capacity: Current Circuit for Long-term Operation------2In 
10s--------------10In 
1s----------------20In
Power Consumption: Power supply capacity not exceeding 10W 
AC input circuit not exceeding 0.5VA per channel 
Measurement Range: Voltage 0.01Un to 2Un 
Current: 0.1In ~ 20In  
Zero Sequence Voltage: 0.01Un ~ 2Un 
Zero Sequence Current: 0.01A to 10A
Measurement Accuracy: Voltage < 0.5% 
Current: < 0.5% 
Zero Sequence Voltage: < 0.5% 
Zero Sequence Current: < 0.01A  
Protection Setting Range: Current 0 to 20In, Differential 0.01A  
Voltage: 0 to 2Un, Differential 0.1V 
Time: 0 to 99.999S, Differential 0.001S 
Protection Action Time: At 1.5 times the rated value, all inherent protection action times do not exceed 35ms 
Input Circuit: Voltage type customizable, Current Consumption 2mA 
Output Contact: Contacts can continuously carry AC220V at 16A current 
Communication Interface: RS-232 and RS-485, rear terminal bus interface, optional configuration

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