Overload Relay Suppliers In South Africa

Overload Relay Suppliers In South Africa

An overload relay is a safety device that protects your circuit against damage caused by high-power loads. The relay opens if the load exceeds a certain amount, protecting the circuit from destruction. The simplest version of an overload relay is a single-pole, single-throw (SPST) switch.

Overload Relay Suppliers In South Africa

What are 2 types of overload relays?

Overload relays are typically one of two types: thermal relays or electrical relays. The overload mechanism inside thermal relays consists of a bimetallic strip in conjunction with a heating element.

What is the difference between MCB and overload relay?

The overload relay operates automatically when the set current exceeds. Here current can be set. MCB is a miniature circuit breaker that is mechanically switched on. It can trip automatically if the current exceeds a preset current.

How do I choose an overload relay for my motor?

The following steps are used in the selection and sizing of the thermal overload relay.

  1. Step 1: Take the motor size from the motor nameplate.
  2. Step 2: Compute the Full Load Current of the motor.
  3. Step 3: Calculate the lower limit of the thermal overload relay by subtracting 20% from the calculated FLC.

Why do we use overload relay?

US Tsubaki's Overload Protection Relays Guide - TSUBAKI POWER ...

Overload protection relays prevent motor damage by monitoring the current in the motor circuit and breaking the circuit when an electrical overload or a phase failure is detected. Since relays are much cheaper than motors, they provide an affordable way of protecting motors.