• RMA Associates

Electronic Circuit Breaker

Availability and safety of production equipment are paramount in modern manufacturing plants. However, DC 24 V switch-mode power supplies, which are widely used in industry today, may stop entire plants as their self-protecting characteristics will shut down the output in the event of overload or short circuit currents with the result that one faulty load in the system can lead to complete disconnection of all loads. To overcome this problem and ensure selective disconnection with genuine physical isolation in the event of a fault (overload or short circuit) while allowing individual loads to start up, RMA Associates offers the E-T-A electronic circuit breaker, Type ESS20. The circuit breaker therefore meets important requirements of the European Machinery Directive 98/37/EC, of European standard EN60204-1 and for CE marking. It prevents a DC 24 V power supply from being shut down inadvertently even with load lines with high attenuation. In the event of a sustained fault condition it physically disconnects the faulty load circuit from the 24V supply.