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Crouzet MWH Phase Monitoring Relays IP20IP30 Crouzet 84873221, This phase monitoring relay from Crouzet has been designed to monitor its own power supply. Equipped with a host of excellent features, including true RMS measurement, LED status indication and IP30 casingIP20 terminals protection, along with the control of 3 phase networks overvoltage between phases, undervoltage between phases and neutral. Crouzet 84873221 H3USN Phase Monitoring Relay
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