Electronic Circuit Breakers

Meeting the requirements of international standards is imperative in DC 24 V applications for centralised and decentralised control voltages.

All devices of E-T-A’s ESS portfolio have a fully-fledged integral bimetal sub-assembly or a relay. In the event of a failure this offers genuine physical isolation of the contacts. In the event of an overcurrent, the load circuit is first electronically disconnected. A few seconds later, the integral mechanical isolating element also disconnects, thus ensuring physical isolation.

All electronic circuit breakers for equipment protection of the ESS portfolio provide physical isolation and entirely meet the requirements of IEC/EN 60934 and UL 1077.

E-T-A’s ESS product range has an electronic trip characteristic to ensure optimum protection in the event of a failure. In addition, the trip curves of the ESS devices offer active current limitation. It ensures limitation of the fault current to a firmly defined value. A simple rule of thumb for electrical planning can be defined as follows: trip current = max. current = current limitation factor typically 1.2 times rated current

The effects a failure such as short circuit or overload in a load circuit can easily be calculated in advance and can already be taken into account in the planning stage.

Benefits of E-T-A ESS Electronic Circuit Breakers

• Enhanced protection for your system and connected loads thanks to physical isolation and selective disconnection
• Increases system availability through clear failure detection and signalling
• Flexible use of the devices through a number of international approvals