MRGQ-63 Series Self-Resetting Over and Under Voltage Protector

The MRQG-63 Series Self-Resetting Over and Under Voltage Protector is a new-generation household protection device developed based on market demands. It uses electronic circuits and modular standards for reliable performance. When the mains voltage exceeds the preset range, the protector quickly cuts off the circuit to ensure appliance safety. Once voltage normalizes, it automatically reconnects the power supply without manual operation. The bicolor LED indicates status: green for normal, red for protection active. With compact structure and elegant appearance, this series is compatible with C65 and DZ47 (C45) rail mounting systems.

product details

Type & Meaning

1	Manufacturer Code
2	Smart Auto-resetting Over/Under Voltage Protector
3	Frame Size Rated Current
4	Number of Poles: 1P+N
5	Rated Operational Current

Product Features

1.Undervoltage Protection: When the voltage falls below the set undervoltage protection value, the protector automatically disconnects the circuit. When the voltage rises above the set undervoltage recovery value, the protector automatically reconnects.
2.Overvoltage Protection: When the voltage exceeds the set overvoltage protection value, the protector automatically disconnects the circuit. When the voltage falls below the set overvoltage recovery value, the protector automatically reconnects.
3.Normal Operating Range: When the working voltage is between the undervoltage recovery value (Uvo) and overvoltage recovery value (Uoe), the protector remains in automatic connection state.
4.Modular Design: Features modular design with 35mm standard rail mounting for easy installation.
5.Anti-Misoperation: When transient or temporary overvoltage occurs on the line, the protector will not generate misoperation.
6.Self-Protection: When the line fault voltage reaches its maximum, the protector itself will not be damaged.
7.High Withstand Voltage: Withstand voltage of 4KV, complying with Class III electrical safety standards.

Technical Parameters

Parameter	Unit	Value
Rated Operating Voltage	V	Un = 230
Pole Number	-	2
Undervoltage Operating Value	V	Uoe = 170 ± 5%
Undervoltage Recovery Value	V	190 ± 5
Overvoltage Operating Value	V	Uvo = 280 ± 5%
Overvoltage Recovery Value	V	250 ± 5
Current Ratings	A	6, 10, 16, 20, 25, 32, 40, 50, 63, 80
Switch-on Delay Time (t1)	s	8–10 (after normal voltage restored)
Switch-off Delay Time (t2)	s	2–3 (after abnormal voltage detected)
Power Consumption	W	≤ 2
Electrical & Mechanical Life	cycles	≥ 100,000
Wiring Capacity	mm²	≤ 25 (conductors and busbars)