The PLMU11 is a microcontroller-based voltage monitor that continuously measures the voltage of each of the three phases to provide protection for 3-phase motors and sensitive loads. It senses undervoltage, overvoltage, voltage unbalance, phase loss, and phase reversal. It features universal voltage operation from 200 to 480VAC and includes a 0.6s random start delay and an isolated 10A SPDT output contact.
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Littelfuse PLMU11 technical specifications.
| Line Voltage | 200 - 480VAC |
| Output Contact Rating | 10A |
| Trip Delay | 0.25 - 30s |
| Operating Temperature | -40 to 60°C |
| Phase Unbalance Trip Point | 2 - 10% |
| Mounting | 8-pin plug-in |
| Safety Code | ASME A17.1 Rule 210.6 |
| Standards | CE, UR, CSA |
| Motor Protection Standard | NEMA MG1 14:30, 14:35 |
| Surge Protection | IEEE C62.41-1991 Level B |
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