ABB – CBS-4C – 3-Module DIN-Rail, 4-Channel Type A Earth-Leakage Relay Station

The CBS‑C is a compact, DIN‑rail mountable earth-leakage relay station that combines four independent Type A leakage protection channels, each with adjustable sensitivity and delay, plus a pre-alarm output. Featuring RS‑ Modbus RTU, it allows centralized monitoring, configuration, and remote reset. Ideal for industrial or commercial switchpanels requiring multi-point protection.

• Model: CBS‑C – programmable earth‑leakage relays + pre‑alarm; RS‑ Modbus RTU enabled  

• Channels:  independent leakage trip relays + pre-alarm relay; each channel triggers breakers via external CTs (Circutor WGC/WGS)  

• Sensitivity: Adjustable from  mA up to  A, with high-frequency filtering and inverse-time curve compliance  

• Timing: User-configurable delays between . s and  s (plus instantaneous option)  

• Display & Buttons: Backlit LCD (green normal, red on trip), status LEDs, programming keys  

• Communication: RS‑ Modbus RTU; remote trip/reset supported via comms  

• External Trip/Reset Input: Voltage-triggered input for external devices (e.g.  V trip/reset)  

• Mounting & Size: -DIN modular width, DIN‑rail EN ; optional panel adapter available