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FA203758
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Energy Meter shows "Phase Loss" Alarm

Issue
Energy meter shows “Phase Loss” alarm on front display.

Product Line
Energy meter (EMB and EME series).

Environment
Installing/wiring energy meter

Cause
If the voltage of any phase is measured as less than 75% of the voltage on any other phase, the display will show PHASE LOSS and indicate the specific phase(s).

Resolution
If the energy meter is installed with the proper number of phases (see selection below to determine this) then the phase voltages should be verified. If the number of phases installed is not correct, then the phase loss alarm will be indicated in all operating conditions.

It’s very important to know the model number of your Energy meter.
For example, users see “Phase Loss” error when they use EMB2043 (1 phase, 3 wire) with 1 phase, 2 wire application.

As a result, it’s very important for users to know their application and use appropriate meter that meets their system type.  Please review the tables below for selecting correct meter.

Basic 120/240 Volt 208 Wye

EMB1010 Basic 100A1 Phase, 2 wire installation1 CT
EMB1021 Basic 200A1 Phase, 2 wire installation1 CT
EMB1032 Basic 300A1 Phase, 2 wire installation1 CT
EMB2010 Basic 100A1 Phase, 3 wire installation2 CTs
EMB2021 Basic 200A1 Phase, 3 wire installation2 CTs
EMB2032 Basic 300A1 Phase, 3 wire installation2 CTs
EMB2043 Basic 400A1 Phase, 3 wire installation2 CTs
EMB2083 Basic 800A1 Phase, 3 wire installation2 CTs
EMB3010 Basic 100A3 Phase, 4 wire installation3 CTs
EMB3021 Basic 200A3 Phase, 4 wire installation3 CTs
EMB3032 Basic 300A3 Phase, 4 wire installation3 CTs
EMB3043 Basic 400A3 Phase, 4 wire installation3 CTs
EMB3083 Basic 800A3 Phase, 4 wire installation3 CTs
EMB3084 Basic 800A3 Phase, 4 wire installation3 CTs
EMB3164 Basic 1600A3 Phase, 4 wire installation3 CTs


Extended Range 120/480 Volt Wye

EME1010 Basic 100A1 Phase, 2 wire installation1 CT
EME1021 Basic 200A1 Phase, 2 wire installation1 CT
EME1032 Basic 300A1 Phase, 2 wire installation1 CT
EME2010 Basic 100A1 Phase, 3 wire installation2 CTs
EME2021 Basic 200A1 Phase, 3 wire installation2 CTs
EME2032 Basic 300A1 Phase, 3 wire installation2 CTs
EME2043 Basic 400A1 Phase, 3 wire installation2 CTs
EME2083 Basic 800A1 Phase, 3 wire installation2 CTs
EME3010 Basic 100A3 Phase, 4 wire installation3 CTs
EME3021 Basic 200A3 Phase, 4 wire installation3 CTs
EME3032 Basic 300A3 Phase, 4 wire installation3 CTs
EME3043 Basic 400A3 Phase, 4 wire installation3 CTs
EME3083 Basic 800A3 Phase, 4 wire installation3 CTs
EME3084 Basic 800A3 Phase, 4 wire installation3 CTs
EME3164 Basic 1600A3 Phase, 4 wire installation3 CTs


NOTE: the meter will operate, however the phase loss alarm will constantly be present if the improper meter is in use.

Released for:Schneider Electric Malaysia

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