Microprocessor Synchronization With Automatic Generator Control

F25, F27, F59, F81, F90

The SPM21 quantitative synchronization relay realizes the measurement of voltage and frequency of inputs of generator and busbar.

It compares the frequency, voltage and phase angle coming from generator with busbar values accepted as reference.

• Automatic synchronization and synchro control
• Fast, proportional voltage and frequency regulation
• Control of phase coherence with circuit breaker closing time control
• Protection against working as motor
• Impulse control when phase-mismatch
• Failure registration
• Mod-bus communication protocol
• UL/CSA listing