Phase Monitor Relays (3-Phase Monitors) provide cost-effective
protection against premature equipment failure caused by voltage faults
on 3-Phase systems (Wye or Delta).
The SLU Series multi-mode phase monitoring
relay was designed for the convenience of plant operators, electricians
and engineers. A single SLU Phase Monitoring Relay can be easily
adjusted for the voltage, imbalance percentage and time delay
requirements to protect against unbalanced voltages or single phasing
regardless of any regenerative voltages.
Both Delta and Wye systems may be
monitored. In Wye systems, connections to neutral and NOT
Note: Not recommended for generator or
variable frequency drive applications.