Gmr-32b Phase Controller Manual May 2026

GMR-32B Phase Controller (or Phase Sequence Relay) is an industrial protective device designed to monitor three-phase power supplies and safeguard equipment like motors and air compressors from electrical faults. Key Features & Functions Comprehensive Fault Detection : Monitors and protects against: Phase Loss : Detects if any of the three phases (R, S, T) are missing. Phase Reversal/Sequence

Regular maintenance includes:

Input Wiring: Connect the incoming three-phase lines to the L1, L2, and L3 (or R, S, T) terminals. The unit is passive and draws power directly from these lines. gmr-32b phase controller manual

  1. Initiates the start sequence.
  2. Monitors generator stability.
  3. Commands the changeover contactor (ATS) to switch load from Mains to Generator.
  4. Upon Mains return, it commands the ATS to switch back and allows the generator a cooling run before shutting down.