Intelligent Protection Terminal | RMU & Substation Control

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Smart Distribution Management
Intelligent Comprehensive Protection Terminal

Intelligent Power Distribution Room System

The intelligent comprehensive protection terminal is designed for short-circuit protection in ring main units (RMUs) or box-type substations, while also providing real-time measurement and display of voltage, current, and switch status for voltage levels up to 35kV. This device is primarily used for the protection, measurement, control, and monitoring of circuit breaker bays within RMUs and can also integrate with other devices or systems as part of a substation automation system.

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Technical Specifications

Rated parameters	Power supply	DC24V, ±20%/DC48V, ±20% (depending on actual needs)
	Power consumption	Power ≤5W (AC input circuit: ≤0.5VA per circuit)
	Analog input	Rated current 1/5A Zero sequence current rated value 1A Rated voltage 100V (line voltage)
	Wiring method	a. Two-phase "V" type, using HC-P20, suitable for conventional ring main unit b. Three-phase "star" type, using HC-P21, suitable for primary and secondary integrated ring main unit
Measurement range (secondary value)	Phase current	0-10/50A
	Zero sequence current	0-10A
	Line voltage	0-150V
Measurement accuracy	Measurement range of phase current	＜2A, no more than 0.05A 2A-50A, the measurement accuracy is better than 2.5%
	Measurement range of zero sequence current	< 0.4A, no more than 0.01A 0.4-10A, the measurement accuracy is better than 2.5%
	Measurement range of line voltage	< 8V, no more than 0.2V 8V-150V, the measurement accuracy is better than 2.5%
Protection operation time	Three-stage overcurrent protection time error ≤40ms (time< 4s) or ≤1.0%
	Ground fault protection time error ≤40ms (time< 4s) or ≤1.0%
	Voltage protection time error ≤40ms (time< 4s) or ≤1.0%
Input circuit	Voltage 24V
	Power consumption ≤ 3mA
Output circuit	Provide 4 open contact output circuits
	Capacity of open contact: AC 250V 5A
SOE time record	Record 100 SOE events
	SOE resolution ≤ 2ms
	Two-event processing capability ≤10ms
Communication interface	One RS485 communication interface, the communication rate can be set

Note: Contact HCRT if a different condition is required. We offer customized solutions as well.

Features

Enhanced Display:

Features a large, user-friendly color LCD screen for clear visualization.

Local Control and Configuration:

Four-directional, reset, return, and confirmation buttons allow for easy navigation and control of measured values, operation, protection settings, and parameter adjustments directly at the device.

Remote Testing Capabilities:

Supports remote point-to-point signaling testing, remote measurement testing, and automatic triggering of Sequence of Events (SOE) records.

Visual Status Indication:

Equipped with operation indicator lights and open/close position indicator lights.

Protection and Alarm Indicators:

Includes dedicated indicator lights for protection actions and alarm conditions.

Extensive Event Logging:

Capable of storing over 100 historical event records with non-volatile memory to prevent data loss during power outages.

Remote Operation:

Offers remote opening and closing functionality.

Standard Communication Interface:

Provides an RS-485 communication interface with open standard communication protocols.

Flexible Protection Configuration:

Protection functions can be easily enabled or disabled based on specific on-site application requirements.