The PMD Series Phase Monitor Relays utilize a microprocessor-based
The relay is energized when the phase sequence and all voltages are correct. Any one of five fault conditions will de-energize the relay. As standard, re-energization is automatic upon correction of the fault condition. Manual reset is available if a momentary N.C. switch is wired to the appropriate terminals. A multi-color LED indicates normal condition and also provides specific fault indication to simplify troubleshooting.
The PMP Series offers a variety of user-adjustable settings. The percent phase unbalance is adjustable from 2-10%, and also has a "Disable" setting for those applications where poor voltage conditions could cause nuisance tripping. The undervoltage drop-out can be set at 80-95% of operating voltage (overvoltage setting is fixed at 110% of nominal). The adjustable time delay drop-out on undervoltage (0.1-20 seconds) eliminates nuisance tripping caused by momentary voltage fluctuations. There is also an adjustable time delay (1-300 seconds) on both power up and restart after a fault has been cleared.
Phase Monitor Relay, 208-480VAC,
THREE-PHASE MONITORING RELAY
| Macromatic Industrial Controls, Inc. | Galco Industrial Electronics | Quarktwin Technology Ltd. | |
|---|---|---|---|
| Product Category | Protective Relays and Monitoring Relays | Protective Relays and Monitoring Relays | Protective Relays and Monitoring Relays |
| Product Number | PMDU | PMDU | PMDU |
| Product Name | Phase Monitor Relays - PMD Series | MCRM Protection Relays | Protection Relays & Systems |
| Voltage Sensitive Relay | Overvoltage Protection; Undervoltage | ||
| Power (Phase) Sensing | Phase Failure (Loss); Reversal; Unbalance | ||
| Protective Functions | Time Delay | ||
| Features | Automatic Reset; Visual Indicator |