Siemens 3WL1110-2CB76-4GS2Z

The 3WL1110-2CB76-4GS2Z is a fixed-mounted air circuit breaker from Siemens SENTRON 3WL series, frame size I, rated current 1000A, rated operational voltage up to 1000V AC. This 3WL1110-2CB76-4GS2Z is a 4-pole version fitted with ETU electronic trip unit, supporting LSI adjustable protection functions including overload, short-time delay and instantaneous short-circuit protection, suitable for 1000V low voltage main incoming, bus tie and heavy feeder circuits. The code 2CB76 defines breaking grade, connection form and trip unit configuration; 4GS2Z defines pole arrangement, auxiliary contacts, shunt trip, undervoltage release and other customized accessory options for this specific variant.

This 3WL1110-2CB76-4GS2Z adopts rear busbar connection, spring stored-energy operating mechanism, supporting local manual operation and optional remote electrical closing and tripping. It can be equipped with optional communication module for CubicleBUS and Modbus, uploading measured data, fault records and breaker status to SCADA and energy management systems. Built-in self-diagnosis records trip codes and fault information for rapid on-site troubleshooting. It complies with IEC 60947-2 standard and is designed for high-voltage low-voltage distribution applications.

The 3WL1110-2CB76-4GS2Z is widely used in industrial substations, power plants, solar and energy storage 1000V distribution switchboards. The SENTRON 3WL platform has been superseded by the newer 3WA series, original production of this 3WL model is discontinued. Most available units are tested surplus spare parts for overhaul and emergency replacement of existing SIVACON low voltage panels.