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The TXB7LVR self-resetting over- and under-voltage circuit breaker uses a small circuit breaker with short-circuit overload protection as the main switch, and is equipped with an ultra-small intelligent electrical operating device with a relay to detect the power supply voltage and realize over-voltage or under-voltage trip protection and after voltage recovery. The function of the automatic recovery circuit ensures the safe operation of the load equipment within the normal voltage range. Compared with ordinary overvoltage and undervoltage protectors, the self-resetting overvoltage circuit breaker eliminates the trouble of wiring, and the installation is more convenient and quicker without considering the upper and lower wiring problems. The integrated self-reset overvoltage protector has a more concise and comfortable appearance, and is the best choice for high-end residential places. It is mainly suitable for occasions where the grid voltage is unstable or equipment protection that is sensitive to voltage changes.
The self-resetting over- and under-voltage circuit breakers comply with JGJ242-2011 "Code for Design of Residential Buildings" and "Self-resetting Over- and Under-Voltage Protectors (OUPA) Standards". This series of products has a good human-computer interaction interface with small and compact size, high breaking capacity, more reliable action and stable performance.
Self-resetting overvoltage and undervoltage circuit breakers are suitable for places with unstable voltages and are very popular in Africa and Southeast Asia. The main function: 1. Overload protection; 2. Short-circuit protection; 3. Isolated circuit; 4. Leakage protection; 5. Over-voltage protection; 6. Under-voltage protection; 7. Self-recovery function


When the ambient temperature is not a benchmark of 30 degrees , the reference correction factor is as folows .

Ambient Temperature -20℃ -10℃ 0℃ 10℃ 20℃ 30℃ 40℃ 50℃ 60℃
Current Correction Coefficient 1.25 1.2 1.15 1.10 1.05 1.00 0.95 0.90 0.85


Rated Current 10A,16A,32A,63A
Poles 1P+N
Rated Voltage (Un) AC 230V 50/60Hz
Undervoltage Trip Delay ≤0.1s
Undervoltage Protection Value 170V±5V (recovery value: 190V±5V)
Overvoltage Trip Delay ≤1s
OverVoltage Protection Value 270V±5V (recovery value: 250V±5V)
Automatic Reset Delay ≤60s
Tripping Curve 5ln< <10ln
Rated Impulse Withstand Voltage(1.2/50)Uimp 4kA
Rated Breaking Capacity (Icn) 6kA
Dielectric Strength 500V AC for 1 minute
Protection Class IP20
Mechanical Life 4000 times, 3 times/min
Action Process When it is detected that the voltage exceeds the undervoltage protection value or the overvoltage protection value, it will be opened after a fixed opening delay, and when the voltage is restored, it will be closed through a fixed self-recovery. Automatic closing after delay.
Action Time Opening ≤ 0.2s, closing ≤ 0.5s (excluding delay)
Operating Temperature -25~+60°C
Relative Humidity ≤95%
Fault Alarm Contact Characteristics 1 Normally open 50VDC(200mA)
Indicator Light Green steady light: normal operation, closed state; red steady light: overvoltage/undervoltage fault
Installation 35MM DIN Rail Mount or M3 Screw Side Mount
Reference Temperature For Setting Of Thermal Element 30°C
Terminal Connection Type Phillips Screws
Adapter Cable 6-63A 1-25mm² 16-3AWG
Thermo - Magnetic Release Characteristic C-Curve (5-7In)
Tightening Torque 3.0N.MC


Rated current (A) Minimum Adapter Copper Wire
6 1 MM2/17AWG
10 1.5 MM2/16AWG
16 1.5 MM2/16AWG
25 2.5 MM2/13AWG
32 4 MM2/11AWG
40 6 MM2/10A
63 10 MM2/7AWG
80 10 MM2/7AWG



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