ABB Stotz S&J Main Circuit Breaker S751/3DR-E50

Manufacturer: ABB Stotz S&J
Designation: Main Circuit Breaker 50A E 25kA 3x1P
Type: S751/3DR-E50
Tripping Characteristic: E
Number of Poles: 3
Rated Current: 50 A
Rated Voltage: 400 V
Rated Insulation Voltage Ui: 690 V
Rated Short-Circuit Breaking Capacity: 25 kA
Switchable Neutral Conductor: No
Frequency: 50 Hz
Overvoltage Category: 4
Degree of Pollution: 3
Rated Impulse Voltage Withstand: 6 kV
Mounting Type: DIN Rail
Protection Class (IP): IP40
Size (according to DIN 43880): 6

The selective main circuit breakers of the S750DR series are certified as voltage-independent selective main circuit protection devices (SHU) according to DIN VDE 0641-21, designed for layman operation and for the highest overvoltage category. Their application area is diverse: as a disconnection device at the meter location according to the TAB of the network operators or VDE-AR-N 4101, as well as in all low-voltage main distributions for the protection of distribution circuits and as a disconnection device with isolation function. Noteworthy are the special selectivity features that ensure high system availability. They are designed for mounting on a 35 mm DIN rail according to DIN EN 60715. Devices of the S750DR family include an integrated locking feature that allows simultaneous blocking of the 3 poles of a three-phase supply. The integrated locking slider locks in the ON or OFF position and can additionally be secured with a padlock, wire seal, or cable tie. The switching state can be monitored via an attachable auxiliary switch.