If you go to the catalog https://www.tgn. by/, you will find many useful devices for controlling and protecting electric motors. This is one of the company's priorities. Many associate it with frequency converters, RCDs, and protection relays.
Let's start with the main dangers. What is it important to protect the motor of a machine, device, or electrical installation from?
As it shows, there are three main dangers. This is a short circuit, overheating and overload.
Short circuit
Occurs most often in the starter. And paradoxically, the best that can happen is the destruction of the entire engine or part of it. Why is it the best?
Because other consequences include a threat to people’s lives, failure of all electrical appliances that are in a common “bundle.”
Overheating
If the engine is very overheated, then the following surprises may occur:
- vibration,
- partial deformations, engine damage,
- the appearance of steam,
- power drop.
Overload.
Overload is a very common problem. It appears against the backdrop of continuous and intense operation of the equipment, and its immediate cause is the passage of too powerful impulses through the chain.
Why is this dangerous?
- Equipment slows down
li>
- Equipment literally burns out.
Protection
The following means help combat short circuits:
- UZO. The equipment prevents human contact with conductive parts and reacts to the current that flows through the phase and neutral conductors.
- Diffautomatic devices. Directly disconnect the electrical circuit.
- Protective relays. There are different relays. But their main task is to control electrical parameters and turn off the circuit when voltage and current increase.
- Frequency converters.
As for overload, it is important to understand that there are thermal overloads and current overloads. Bimetallic relays best protect against thermal overloads, but to combat current overloads, you can fight both with relays and with automatic circuit breakers.
But to combat overheating, fusible elements are actively used. Without them, it is difficult to imagine, for example, the operation of soft starters.
Of course, each object requires an individual approach. Therefore, there is a huge variety of devices for controlling and protecting an electric motor. And it is important to find your optimal one.
Thoughtful protection of the electric motor of a machine, lift, or electrical appliance plays a key role in ensuring the efficiency and reliability of their operation.
