Phase sequence monitoring relay MXP-20 series
DIN rail

phase sequence monitoring relay
phase sequence monitoring relay
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Measured/monitored value
phase sequence
DIN rail


A relay for monitoring a 3-phase AC power supply with or without Neutral. The relay monitors that all phases are available and in the correct phase sequence L1, L2, L3 (U,V,W), that none of the phases are shifted more than 20° in relation to each other and that one or more of the phase voltages are not too low. When all three monitoring criteria are fulfilled the relay is activated. If one or more of the criteria are not fulfilled the relay de-energises and a red LED indicates failure. Fixed limits for energizing and de-energizing the single output relay. With connection of Neutral the measuring abilities are optimal, as Neutral works as a measuring reference. Without Neutral, the phase monitoring relay generates a Neutral reference from the connected phases.


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