GE EPM 3000P instruction manual Voltage Phase Reversal, Voltage Phase Imbalance Limit

Chapter 4 EPM3000P Overview

AC VOLTS

						A B C A B C
						I I I	I I I
						N N N B C A
005						AC AMPS
							A B C N
	MAX MIN					LM1		LM2
		MAX/MIN	PRINT	VOLTS	AMPS	PHASE
		LIMITS	PROG			NEXT

				_		AC VOLTS
				_		A B C A B C
						I I I		I I I
						N N N B C A
	_ _					AC AMPS
	_						A B C N
MAX							LM1	LM2
		MIN
	MAX/MIN		PRINT	VOLTS	AMPS	PHASE
	LIMITS		PROG			NEXT

Step 3:

a. Press PHASE/NEXT each time the appropriate password number appears.

Step 4:

ÖUpon entering the correct password, the display blanks and a checkmark appears, confirming successful reset.

4.3ACCESSING THE LM1/LM2 SET LIMITS FROM OPERATING MODE

The DMVA100 is designed with two manual set limits. The set limits monitor the instantaneous readings, warning the user of abnormal conditions. Each limit can detect readings above or below the set level. SET LIMITS: the point when the relay changes position, if the DMVA100 is equipped with the Relay Option (Suffix -NL).

If a limit is exceeded, the annunciator LM1 and/or LM2 indicator glow and the display flashes, alternating between the instantaneous reading.

ÖTo VIEW THE SETUP OF THE LM1/LM2 SET LIMITS OF THE FUNCTIONS, follow these steps:

AC VOLTS

I25.0 AI BI CI AI BI CI N N N B C A

AC AMPS

A B C N

MAX MIN LM1 LM2

AC VOLTS

		A B C A B C
		I I I I I I
		N N N B C A
	l i	AC AMPS
		A B C N
MAX MIN		LM1 LM2

AC VOLTS

		A B C A B C
		I I I I I I
		N N N B C A
	l i	AC AMPS
		A B C N
MAX MIN		LM1 LM2

MAX/MIN PRINT LIMITS PROG

VOLTS AMPS

PHASE NEXT

MAX/MIN	PRINT	VOLTS	AMPS	PHASE
LIMITS	PROG			NEXT

MAX/MIN	PRINT	VOLTS	AMPS	PHASE
LIMITS	PROG			NEXT

Step 1:	Step 2:	Step 3:
a. To access the set limit, press	a. Press PHASE/NEXT when the	a. Press PHASE/NEXT when the
MAX/MIN/ LIMITS:	LM1 annunciator glows.	LM2 annunciator glows.
ÖTHREE times for LM1	ÖThe annunciators that glow are	ÖThe annunciators that glow are
ÖFOUR times for LM2	out-of-limits in LM1.	out-of-limits in LM2.

4.4VOLTAGE PHASE REVERSAL AND IMBALANCE FROM OPERATING MODE

In a three phase power distribution system, the normal phase shift between each line is 120°. The EPM3000P detects an abnormality and displays a PH message every six seconds.

VOLTAGE PHASE REVERSAL:

If there is an incorrect connection, such as mistaking line A for line B, a PH message appears. The correct sequence is a-b-c.

VOLTAGE PHASE IMBALANCE LIMIT:

Can be detected using the phase imbalance limit in the Programming Mode. The phase imbalance is expressed in a percentage with 0% indicating a 120° phase shift between each line. A PH message appears if the limit is exceeded.

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