Carlo Gavazzi DWB01CM4810A Load Guard Relay 3 Phase

The DWB01CM4810A is a Carlo Gavazzi 3‑phase Load Guard monitoring relay that guards a balanced three‑phase load by tracking power factor (cos φ) and related electrical signals, and it activates a single SPDT control output when preset limits are reached. Designed for 380–480 V AC mains, it mounts on a DIN rail in a 45 mm housing for compact panel installations. The unit accepts measuring ranges up to 5 A or 10 A, or can be used with MI current transformers for higher currents, with upper and lower setpoints adjustable on an absolute scale and a Power On delay adjustable from 1 to 30 seconds. A single SPDT (change‑over) output supports normally open or normally closed configurations for alarm or interlock signaling. LED indicators provide at‑a‑glance status for power, alarm, and relay activity, aiding diagnostics in control panels. UL approval is listed for safety, and the device supports direct reading or operation with external CTs, enabling use in automatic protection, load management, and automatic/manual start/stop schemes in three‑phase systems. The DWB01CM4810A is part of Gavazzi’s family of 3‑phase load‑guard relays intended for compact DIN‑rail installations, with optional MI series CTs to extend measurement ranges as needed in higher‑current applications.