An overload relay is like a bodyguard for your motor. Its job is to protect the motor from overheating if it’s working too hard.
Here’s how it works, step by step:
⚡️ Motor draws current — When the motor runs, it pulls electricity from the panel.
📈 Too much current? — If the motor has to work harder than normal (maybe the machine is jammed or overloaded), it starts pulling more current than it’s supposed to.
🌡️ Overload relay feels the heat — The overload relay senses this extra current and starts getting warm.
⛔️ Relay trips and shuts down the motor — Once the relay gets too hot (because the motor is working too hard for too long), it trips — cutting power to the motor to protect it from damage.
due to the extension of loads they are using the relays for protection.........
only the single phase monitored at which it installed
The load current is made to flow through the thermal overload relay, which is actually a bimetalic strip. Beyond a prespecified current the bimetalic strip tend to deflect due to heat (thermal effect) thus cutting off the circuit and hence it acts as an over load relay protection.
The Allen-Bradley SMP-1 overload relay operates by monitoring the current flowing through the motor circuit. It uses a bimetallic element that heats up as current increases, bending and eventually tripping the relay when the set overload threshold is reached. This action disconnects the motor from the power supply to prevent damage due to overheating. The SMP-1 is designed for easy reset and can be adjusted for different trip settings to accommodate various motor specifications.
A local breaker backup relay is used to check the operation of distribution circuit breakers and to trip the feeder circuit breaker if the distribution circuit breaker fails to trip on an overload.
Moeller's overload relay works by monitoring the current flowing through a motor. If the current exceeds a set value for a period of time, the relay will trip and disconnect power to the motor, protecting it from damage due to overheating. This helps prevent the motor from drawing too much current for an extended period, which could be harmful.
due to the extension of loads they are using the relays for protection.........
A device with an overload protection used to control a motor is an Overload Relay.
overload model no Ke-FKR4(D)
only the single phase monitored at which it installed
Protects the flasher relay from an overload or short.
Dashpot Overload Relay
The load current is made to flow through the thermal overload relay, which is actually a bimetalic strip. Beyond a prespecified current the bimetalic strip tend to deflect due to heat (thermal effect) thus cutting off the circuit and hence it acts as an over load relay protection.
the overload relay. This allows the overload relay to accurately measure the current being drawn by the motor and provide protection in case of an overload condition. It ensures that the overload protection is effective and responsive to the motor's operation.
there is a bi metalic strip is thre in thermal overload relay so when the currtent is high then its settings so that strip bend due to thermal and it touches the other side of the contact so when u touch the tester on that side u will find that its overload if u dont under stand contact me......
according motor which we use suppose if it is 2.2kw then the range of OLR(over load relay) is 2-3.2
The flux capacitor will overload and you will fail to reach 88 mph.