ABB Selective Main Circuit-Breakers S750 and S750 DR series acc. to DIN VDE 0641-21

Selective main circuit-breakers of the S 750 and S 750 DR series are SMCBs

according to DIN VDE 0641-21 with voltage-independent Operating principle.

This means that they do not rely on a control circuit to make or break contact

(SHU) and are therefore particularly suitable for use in energy distribution

systems with maximum availability requirements. Two mounting variants

are available: S 750 for bus bars and S 750 DR for DIN rail mounting.

– High short-circuit breaking capability of 25 kA over the complete rated current range

– High energy-limiting capacity by current-limiting selectivity

– Suitable for selective overcurrent protection at the meter

mounting board and in general-purpose electric main distribution boards

– Suitable to disconnect and isolate electric circuits

– Voltage-independent function (no connection to neutral)

– Applicable in installation acc. to:

Overvoltage category I … IV,pollution degree 1 … 3

– S 750 DR version for DIN rail mounting

– S 750 version for mounting on busbar systems without

using any tools, with screwless connection on load side

and additional cage terminals for the supply to the busbar system

– Isolation function according to IEC 60364-5-53

– Additional contact position indicator

RED = ON ; GREEN = OFF

– Lockable and sealable

– For operation by ordinary people

2CDC 021 205 F0007

Fields of application

– As isolating device in meter boards for downstream

customer´s installation

2CDC 021 007 S0011

– In main distribution boards or switchgear as a selective

group or back-up protection device, especially where a

high degree of continuity of supply is required, e.g. for

installations related to “Safety Services” (IEC 60346-5-56),

“Medical Locations” (IEC 60364-7-710) etc.

– For general applications with tripping characteristic E

– For the protection of areas where high current peaks

(e.g. start-up currents) occur during operation, using

circuit-breakers with tripping characteristic K (S 750 DR)