Why is a starting current limiter needed?
When a transformer is energized, an inrush current occurs, which can cause a very high current spike for a short period of time. The magnetizing current can then be 10-20 times greater than the rated current of the transformer. This can cause several problems:
– Fuses or earth leakage breakers tripping
– Heavy load on switches and contactors
– Mechanical hum or stress in the transformer core
– Unnecessary wear on electrical installations
High starting currents may force you to choose a larger main fuse, which means a more expensive electricity subscription. In addition, power spikes can affect costs if you are on a power tariff. With a starting current limiter, the risk of fuses tripping is reduced and you can keep a smaller main fuse, saving money.
The solution
With a starting current limiter, the current spike is attenuated, and full current is only allowed through once the magnetic field in the transformer has stabilized. This allows the transformer to start with less risk of blowing fuses, so you can keep a smaller main fuse and save money.
We offer transformers with starting current limiters
Contact us for more information and advice on the right solution for your application.