Model: PM-2160-A
Doc. Ref. no. : - m20Aom201
Issue no. 02
Page 33 of 36 User’s Manual
8. IMPORTANT NOTES
Before starting Installed Meter, Go through these notes:
General Setting & Condition for CT, PT ratio
Confirm the connection configuration
Confirm that all energy parameters, Hour parameters, MD parameters & Power
Interruption counter are going to start from zero, if not, make them zero by All Regs Rst.
Vrated and Irated should be set equal to PT secondary P-N Voltage and CT secondary
Current Respectively.
Apply proper CT – PT Ratio as per requirement, which must pass the below mathematical
conditions for 3P3W and 3P4W.
For 3P4W
3x1.2xVratedx1.2xIratedx CT Ratio x PT Ratio < 2,000,000,000
For 3P3W
2x1.2x√3xVratedx1.2xIratedx CT Ratio x PT Ratio < 2,000,000,000
Select Energy type for LED Blinking as per your requirement.
Confirm that Meter is calibrated.
For Serial communication, MODBUS-RTU, RS485, you will get real/long data from
measurement.
Factory set Password to access the Program mode is 0001.
Some parameters in configuration are only for factory purposes so please don‟t disturb
these parameters like V rated, I rated & System.
For 3p3w system, Display Menu will be changed and for modbus communication, follow
the address map for 3p3w.Program mode will be same.
ON Hour, LOAD Hour, IDLE Hour& Power Interruption Count
ON Hour: The period for which the meter (supply) is ON
LOAD Hour: Indicates the period the Load is ON and has run. This counter accumulates
as long as the load is greater than the starting current (0.1% of the Irate) set.
IDLE Hour: Indicates the period of difference between ON Hour and LOAD Hour.
(ON, LOAD, IDLE Display two quantity Hours and Minute.
Power Interruption Count: Number of Supply Outages, means the number of Auxiliary
Supply interruptions. If the meter Auxiliary Supply is from a UPS then the INTR (number
of interruptions) will be zero (as long as the UPS stays ON), even if the Voltage Signals
did die out from time to time.
It shows last Power OFF & Power ON time. [Available with RTC option only]
Energy Pulse O/P Constant Setting
For Front Blinking LED, select energy type (i.e.-import/KWh-export/KVARh-
Import/KVARh-Export/KVAh/MWh-Import/MWh-Export/MVARh-Import/MVARh -
Export/MVAh) as per your requirement using Program mode, from OUTPUT and set the
value of constant. But here you can get maximum output pulse frequency (& LED Blinking
rate) up to 50 msec. so whenever you are using this feature; you should set value of
Meter-Constant such a way so it will not cross the limit of 50 ms pulse frequency.
As pulse frequency is 50 msec, i.e. in one second maximum 20 pulses can be obtained,
hence in one hour maximum 72000 pulses can be obtained.
Total no of impulses/second can be calculated as below
(Vrate * Irate * CTR * PTR * Pulse Constant in Wh)/3600 <= 20.
Example: Meter specification
V rated = 240V, I rated = 5A, CT ratio = 40 and PT ratio = 100,
Above meter can consume maximum of 4.8MWatt.
I.e. For 3600 pulses/KWh [3.6 pulses/Wh], it will generate 4800 pulses/sec as per above
equation, [240*5*40*100*3.6/3600 = 4800] so it will not work for the meter as it is more
than 20 pulses/sec
I.e. For 2000 pulses/MWh [0.002 pulses/Wh], it will generate 2.666 pulses/sec as per
above equation, [240*5*40*100*0.002/3600 = 2.66] so it will work for the meter as it is
less than 20 pulses/sec
This is for single phase only, in case of three phases, energy will be multiplied by three in
3p4w and hence pulses should be calculated for three phase energy.
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