E, 40 A, 230 / 400 V AC, 50/60 Hz, 25 kA, IV, 6 kV, IP20, IP40
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
Fields of application
– As isolating device in meter boards for downstream customer´s installation
– 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)
Purpose
– Ensure power supply capability over a large temperature range
– Protect wires and cables in case of operational overload or short-circuit
– Additional limitation of let-through current and let-through energy in case of short-circuit tripping in final circuit
– Disconnection and isolation of the system, also by ordinary people
– Special selectivity with respect to downstream circuit breakers and upstream fuses
– Ensure a high availability of the electrical power supply
