CHAPTER 5: MONITORING A1 METERING
PQM POWER QUALITY METER – INSTRUCTION MANUAL 5–15
watthour value. The setpoint S1 PQM SETUP \ CLEAR DATA \ CLEAR ENERGY VALUES is
used to clear this value. The displayed value will roll over to 0 once the value 4294967295
(FFFFFFFFh) has been reached.
3Φ POS REACT ENERGY: This message displays the positive varhours (in kvarh) since the
TIME OF LAST RESET date. Reactive power in the positive direction will add to this
accumulated value, and reactive power in the negative direction will add to the negative
varhour value. The setpoint
S1 PQM SETUP \ CLEAR DATA \ CLEAR ENERGY VALUES is
used to clear this value. The displayed value will roll over to 0 once the value 4294967295
(FFFFFFFFh) has been reached.
3Φ NEG REACT ENERGY: This message displays the negative varhours (in kvarh) since the
TIME OF LAST RESET date. Reactive power in the negative direction will add to this
accumulated value, and reactive power in the positive direction will add to the positive
varhour value. The
S1 PQM SETUP \ CLEAR DATA \ CLEAR ENERGY VALUES setpoint
clears this value. The displayed value will roll over to 0 once the value 4294967295
(FFFFFFFFh) has been reached.
3Φ APPARENT ENERGY: This message displays the accumulated VAhours (in kVAh) since
the TIME OF LAST RESET date. The setpoint
S1 PQM SETUP \ CLEAR DATA \ CLEAR
ENERGY VALUES
clears this value. The displayed value will roll over to 0 once the value
4294967295 (FFFFFFFFh) has been reached.
REAL ENERGY LAST 24h: This message displays the accumulated real energy (in kWh) over
the last 24-hour period. The 24-hour period used by the PQM is started when control power
is applied. The PQM updates this value every hour based on the previous 24-hour period.
This information will be lost if control power to the PQM is removed.
REAL ENERGY COST: This message displays the total cost for the real energy accumulated
since the
TIME OF LAST RESET date. The setpoint S1 PQM SETUP \ CLEAR DATA \ CLEAR
ENERGY VALUES
clears this value.
REAL ENERGY COST PER DAY: This message displays the average cost of real energy per
day from time of last reset to the present day. The cost per kWh is entered in the
S1 PQM
SETUP \ CALCULATION PARAMETERS \ ENERGY COST PER KWH
setpoint.
TARIFF PERIOD 1/2/3 COST: These messages display the cost accrued for the three user-
definable tariff periods. The start time and cost per KWh for these tariff periods are entered
with the
S1 PQM SETUP \ CALCULATION PARAMETERS \ TARIFF PERIOD 1/2/3 START
TIME
and the S1 PQM SETUP \ CALCULATION PARAMETERS \ TARIFF PERIOD 1/2/3
COST PER KWH
setpoints, respectively.
TARIFF PERIOD 1/2/3 NET ENERGY: These messages display the net energy for the three
user-definable tariff periods. The start time and cost per KWh for these tariff periods are
entered with the
S1 PQM SETUP \ CALCULATION PARAMETERS \ TARIFF PERIOD 1/2/3
START TIME
and the S1 PQM SETUP \ CALCULATION PARAMETERS \ TARIFF PERIOD 1/
2/3 COST PER KWH
setpoints, respectively.
TIME OF LAST RESET: This message displays the time and date when the energy
parameters were last cleared. The setpoint
S1 PQM SETUP \ CLEAR DATA \ CLEAR
ENERGY VALUES
clears the energy values.
Courtesy of NationalSwitchgear.com
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