►Product Overview

The CSR010 (Self-Powered) protection device is specifically designed for applications in Ring Main Unit systems. It can be integrated into circuit breaker or fuse cabinets and features various operating characteristic curves for phase overcurrent protection, zero sequence overcurrent protection, and a direct tripping function via external contacts. It is applicable in protection scenarios for busbars, lines, and distribution transformers.

The CSRO10 (Self-Powered) protection device employs a highly integrated microprocessor that processes signals from current transformers without requiring external chips. It controls the device's output through digital logic operations. The device has a compact structure, a sealed chassis, a maintenance-free design, and excellent interference immunity, making it particularly suitable for Ring Main Unit systems operating in harsh environments with limited installation space.

►Product Features

The CSR010 intelligent protection device utilizes a highly integrated microprocessor, without bus output chips, to process signals from current transformers. 

The device features a sealed chassis, a maintenance-free design, and excellent interference immunity. 

It is especially suitable for ring main unit systems that operate in harsh environments with limited installation space.

►Product Parameters

Rated Specifications: Frequency: 50 Hz/60 Hz (Universal) 
AC Current: 5 A or 1 A (Universal) 
Power Supply: DC 48 V, ±20%    
DC24V，±20%
Self-Powered, drawing power from the phase current transformer
Overload Capacity: Current circuit long-term operation ------ 10 A
10s--------------50A
1s---------------100A
Power Consumption: Average power not exceeding 1 W when powered by an external power supply Not exceeding 0.5 VA when self-powered (device startup power not exceeding 0.2 VA)
Measurement Range: Phase current 0.05 A to 50 A
Zero Sequence Current: 0.005A—5A
Measurement Accuracy: Phase Current < 1% or not exceeding 0.01A 
Zero Sequence Current: < 1% or not exceeding 0.001A
Protection Action Time: Instantaneous Protection has an inherent action time not exceeding 20ms at 2 times the set value.
At 1.5 times the set value, all protection inherent action times do not exceed 35ms.
Input Circuit: External power supply provided; voltage type is customizable, with a current consumption of 2mA.
Output Contact: DC24V (coil); contacts can continuously handle DC220V at 10A current.
Communication Interface: Panel communication port—dedicated debugging port.
Terminal communication port—RS485 interface.

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