The mechatronic circuit breaker type EBU10 T provides selective overcurrent protection in AC 230 V UPS systems The unit consists of an MCB approved for short circuit interruptions up to 10 kA The second element is an add on electronic circuitry for measuring and evaluation tasks The product is available with the typical MCB ratings 4 A 6 A 10 A and 16 A with B and C characteristics and is directly operated at the output of the corresponding UPS Uninterruptible power supplies only provide a limited current in the event EBU10 T Electronic Breaker Unit for AC 230 V Power safety for UPS operation of a short circuit The current provided by the UPS is not sufficient to trip a thermal magnetic overcurrent circuit breaker Thus in the event of a failure the entire UPS system will be disconnected The EBU10 T type can be adjusted to the actual load conditions and the capability of the UPS unit in question by means of two selector switches The device will reliably trip in the event of a failure And only the load path concerned will be disconnected All other paths remain unaffected The EBU10 T unit tolerates switch on operations and the corresponding high inrush currents Benefits Enhanced system availability through effective protection Reduction of overall costs by a 1 3 more efficient rating Easy planning with a variable overcurrent protection tim e in s current in A 10 000 1 000 100 10 1 0 1 0 01 0 001 1 0 10 0 100 0 1 000 0 tim e in s current in A 10 000 1 000 100 10 1 0 1 0 01 0 001 1 0 10 0 100 0 1 000 0 UPS systems only provide a limited current in the event of a short circuit red curve The current provided by the UPS is not sufficient to trip a thermal magnetic overcurrent circuit breaker blue curve When adjusted correctly the trip curve of the EBU10 T lies within the working area of the UPS Power safety through the UPS is reliably ensured The trip curve of the MCB is outside the working area of the UPS No trip in the event of a failure Enhanced system availability through effective protection trip range MCBworking area UPS Output curve UPS battery powered 14 A Output curve UPS battery powered 14 A Curve of load Example power supply 3 A Curve of load Example power supply 3 A Characteristic curve MCB C 10 A Trip curve EBU10 T

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