What Is A Time Delay Circuit Breaker

By | February 2, 2023



A time delay circuit breaker, also known as a delay-on-make timer, is a device that helps protect electrical circuits from being overloaded with power. This type of breaker is designed to cut off the power when it senses an overload, but with a slight delay before it does so.

Time delay circuit breakers are helpful for protecting against dangerous electrical surges and preventing fires from starting. By delaying the moment when the breaker breaks the circuit, the risk of damage to the circuit or appliances connected to it is reduced. This makes them commonly used in a range of applications such as protecting motors, switches and transformers, or other components that can become overloaded.

The time delay feature of the breaker is based on the current flowing through the circuit. When the current is too high, the circuit breaker will not immediately shut off the power, instead, it will wait a few seconds, allowing the current to naturally drop before disconnecting power. This allows the current to reduce to a safer level before cutting off power, rather than the sudden shutoff of an ordinary circuit breaker.

Another advantage of a time delay circuit breaker is that it won't be triggered by a short-term overload caused by a spike in current, such as when large appliances turn on and off. This makes them ideal for use in areas where there may be short-term overloads due to normal operating conditions.

Installing a time delay circuit breaker is relatively simple, although always remember to check your wiring and connections before switching on the power. They do, however, require more testing than regular circuit breakers, as the delay function needs to be tested more regularly.

In summary, time delay circuit breakers are essential for protecting against dangerous electrical surges and preventing fires. They can help ensure the safety of your electrical components and appliances, without tripping out unexpectedly during normal operation. They should be tested regularly, however, and to guarantee correct installation, you should consult a professional electrician.


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