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Activation current limiter

Gentle start-up for one-phase and three-phase electrical consumers

High activation currents, e.g. for start-up of electric motors, can damage or interfere with the supply network and other connected consumers. Voltage-controlled activation current limiters prevent heavy choking of the mains voltage and overloading due to current peaks. The activation current limiter works with a pre-adjusted limiting resistor (NTC) which reduces the activation current so that the consumer starts up more slowly. After a defined time delay, the NTC of the activation current limiter is bypassed automatically and the full output is available. ISMET delivers activation current limiters in several designs for various application and installation variants.

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ESBN-S

Starting current limiters are voltage-controlled devices. Their functioning is based on a time-delayed bridging of the incorporated damping resistor (NTC) which is set ex works. Plastic casing, can be snapped onto mounting rail TS 35.

IR: 25 AUPRI: 110 - 400 V

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Time delay can be switched over in 2 steps. Damping can be changed in 2 steps according to connection. Application: Limitation of starting currents in electrical devices, e.g. transformers, electric motors, etc. The starting current limiter is connected directly in series to a device which is exposed to a high starting current. Design: The ESBN-S type is constructed for a nominal current of 25 A. Caution: Due to the incorporated overtemperature protection, the starting current limiter requires a certain cooling down phase between the switching cycles. The time between two switching cycles should be approx. one minute. For the ESBN-S model to continue limiting operation, it is required that the voltage value first drops to zero.

Variants overview

Rated current Article number Measurements Weight
Primary current PRI 110-230 / 230-400 V
SEC 110-230 / 230-400 V 		a x b x c / L x B x HCU kgGes. kg
A
25 70 x 63 x 8500
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