Everyone has heard stories about a neighbor's refrigerator or TV burning out due to a "power surge." Unfortunately, unstable voltage in the grid is not a myth but a real threat to any household appliance. Fortunately, there is a simple and effective solution — a voltage control relay.
WHAT IS A VOLTAGE RELAY?
In simple terms, it's a smart fuse. The device continuously measures the voltage in your network. As soon as it goes beyond safe limits (becomes too low or too high), the relay instantly cuts off the electricity supply to the entire apartment. When the voltage returns to normal, the relay waits for a short pause and then turns the power back on. This way, your appliances don't even have time to experience the dangerous surge.
WHAT TO LOOK FOR WHEN CHOOSING?
Choosing a relay is not difficult; the main thing is to know three key parameters:
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MAXIMUM CURRENT (AMPERES, A) The voltage relay is installed in the electrical panel right after the main circuit breaker. Its rated current should be equal to or, even better, one step higher than the rating of your main circuit breaker.
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If the main breaker is 32A, get a 40A relay.
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If the breaker is 40A, choose a 50A relay. This creates a necessary safety margin.
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VOLTAGE LIMITS (UPPER AND LOWER) On any relay, you can set the tripping thresholds. The recommended safe values for most household appliances are:
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Lower limit: 180-190 Volts.
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Upper limit: 245-250 Volts.
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POWER-ON DELAY TIME This is a very important function. After the voltage normalizes, the relay does not turn the power on immediately but waits for a set time (e.g., 3 minutes). This is critically important for appliances with compressors (refrigerators, air conditioners), which can be damaged by frequent on/off cycles. For such devices, set a delay of 180-300 seconds.
CONCLUSION
A voltage control relay is a mandatory device for every modern apartment or house. It is a small investment that protects your expensive appliances worth thousands and gives you peace of mind.
Our store, 175.com.ua, offers a wide selection of reliable voltage relays, including the popular and time-tested ZUBR models. Contact us, and we will help you choose the perfect option for your protection!
