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CHAPTER 5: OVERVIEW
30
EPM 5000 series Advanced Power Meters GE Multilin
5.5: Accessing Max/Min Values
Max/min values represent the highest and lowest average demand over a user programmable time period
known as the Integration Interval. The readings are calculated using a rolling average technique. Each
second, a new reading is used to calculate the max/min; the last reading of the interval is dropped off.
The highest max during an averaging period is stored until the user resets the max/min. This is similar to
amp demand meters. It is commonly referred to as Thermal Demand.
To access a max/min value while displaying a desired measurement, press MAX/MIN/LIMITS—once for
the max value; twice for the min. Examples given below are for voltage and current phases. Use the
same procedure for all other parameters.
MAX/MIN
LIMITS
KVAR
PF
KW
KVA
FREQ
KWHKVAH
AC VOLTS
AC AMPS
POWER
NC
B
A
MAX
MIN
A
N
B
N
C
N
A
B
B
C
C
A
LM2
LM1
NEXT
PHASE
VOLTS
AMPS
POWER
MAX/MIN
LIMITS
KVAR
PF
KW
KVA
FREQ
KWH
KVAH
AC VOLTS
AC AMPS
POWER
NC
B
A
MAX
MIN
A
N
B
N
C
N
A
B
B
C
C
A
LM2
LM1
NEXT
PHASE
VOLTS
AMPS
POWER
MAX/MIN
LIMITS
KVAR
PF
KW
KVA
FREQ
KWHKVAH
AC VOLTS
AC AMPS
POWER
NCBA
MAX
MIN
A
N
B
N
C
N
A
B
B
C
C
A
LM2
LM1
NEXT
PHASE
VOLTS
AMPS
POWER
Step 1:
a. To select the Volts category,
press VOLTS.
! The display blanks and all
annunciators glow, confirming
selection.
Step 2:
a. Press PHASE/NEXT for the
desired phase.
Step 3:
a. Press MAX/MIN/LIMITS once
to view the maximum reading for
Volts C-N.
! The display blanks and
momentarily indicates the max
value.
To access KW, KVAR and PF negative measurements indicating leading current, press MAX/MIN/LIMITS
five times for negative max and six times for negative min.
5.6: Resetting Values
Use the reset function if a new value is desired. It is available in two different modes.
1.UNPROTECTED MODE: Allows quick and easy resetting of max/min values.
2.PROTECTED MODE: Prevents unauthorized resetting the max/min and totaled power functions.
Note
: Even if the unprotected mode is selected during programming, the KWH and negative KWH
are always in protected mode. The following examples are for the max/min.