WRM2L-250E External Circuit Breaker of the Energy Meter

WRM2L-W electric energy meter external circuit breaker has short-circuit overload protection, through the detection of the electric energy meter control signal for automatic control to turn on or off the load, to achieve arrears of open and pay for automatic control. The product meets the requirements of the State Grid QGDW11421-2015 "Technical Specification for External Circuit Breakers for Electric Energy Meters", "Technical Specifications for Low-voltage External Circuit Breakers for Fee-controlled Electric Energy Meters" of China Southern Power Grid, GB10963.1 "Overcurrent Protection Circuit Breakers for Household and Similar Places" and GB/T14048.1 and GB/T14048.2.

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Functional structure features

Protection features It has the functions of over-voltage, under-voltage, phase loss, electronic overload, short-circuit, short-delay and instantaneous protection.

Monitoring and recording function Record the three-phase voltage, three-phase current parameters and time mark of nearly 10 trips; Cumulative parameters such as the total number of trips of the protector and the number of trips of the latching nature.

Control functions The synchronous opening and closing functions of the protector can be realized through the external disconnection and reset interfaces.

Display features In the closed state, the current time, the current three-phase voltage parameters, the current three-phase current parameters, etc. are automatically displayed in cycles.

Settings and query functions The functions of automatic reclosing, overvoltage, undervoltage, phase loss, and overload protection can be enabled and disabled by pressing the button; It can be used by the main parameters such as key rated current, short-circuit short-delay multiple, short-circuit short-delay time, short-circuit instantaneous multiple, timed trial time, real-time clock and user password. You can query through the button, trip record, test time, total trip times, locking trips and many other parameters.

Performance parameters

Description of electrical characteristics and status

Model		Parameter description
Shell Grade Rated Current Inm(A)		250、400
Rated current In(A)		0.4~1.0Inm(A) continuously adjustable
Applicable progressions		3P+N
Delay Coincident Time(s)		20~60
Overvoltage action value (V)		Default 275±5% (User Adjustable)
Undervoltage action value (V)		Default 165±5% (User Adjustable)
Phase-loss action value (V)		Default 120±5% (user adjustable)
Classification of action characteristics		AC type
Product usage category		Category A

Overload protection feature (anti-time limit operation)

Rated operating current of the tripper (A)	Trip device (ambient temperature 40°C)
Rated operating current of the tripper (A)	1.05In (Cold)	1.30In (Hot)
In≤63A	≥1h does not move	<1h action
In>63A	≥ 2h does not move	< 2h action

Instantaneous overcurrent tripper current setting value (multiples can be set, default 10 times)

Shell Grade Rated Current Inm(A)	Trip device (ambient temperature 40°C)
250	10In±20%	<0.2s
400	10In±20%	<0.2s

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Product datasheet

WRM2L-250E External Circuit Breaker for Energy Meter

2024-09-24

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WRM2L-250E External Circuit Breaker for Energy Meter

2024-09-24
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