
15
UM/SWHM/V3/0115
4.
PREPAID METER OPERATION
The meter is suitable for Three-phase four wire (PE5120)/ Single Phase 2 wire system (PE5121).
Meter measures electrical energy consumed and decrements the available credit register in accordance
with the energy consumption-KWh or kVAh. The available credit register is incremented as and when
payment is made. Meter continuously calculates the balance credit against the consumption.
As the balance credit decreases beyond the pre-defined level, a switch (latching relay) is used to
disconnect the supply to the load. Meter display starts blinking when the credit balance falls to a
programmed value.
Over voltage (OVER.VOL) Tripping
: This is the unique feature from the Elmeasure meter to protect the
equipment when the over voltage occurs. When the Line voltage is more than programmed value the
prepaid meter trips the load, thus protecting the house hold equipments. This replaces the need for
over voltage relays in individual houses.
Over.KVA (EB or DG)
: Elmeasure meters have the unique feature to program the set limit for
consumption when it is operating on EB and DG in terms of kVA. When the consumption is above the
set value then the LOAD gets disconnected for a span of 1 minute (programmable through
configuration) after which the LOAD gets connected for the SET DELAY time to see the load is reduced
and if the consumption is still higher it trips the load for the 2
nd
delay time (programmable) and this
process gets repeated with the different programmable delay time until the consumption is reduced.
DG SELECTION:
Elmeasure prepaid meter has great optional feature i.e. individual phases on for DG (R,
Y, B or RYB or No DG). This feature can avoid ACCL to individual houses.
COMMUNICATION SETTINGS:
4.1.
KEY FUNCTIONS
Smart Keys
Operating the energy meter is easy, using the two smart keys to navigate through the display
pages. The display shows where you are headed.
Protocol Modbus RTU
Data bits 8
Baud rate 9600 Baud, User set 1200 to 19200
Range:1200, 2400, 4800, 9600, 19200
Normal use: 9600 Baud
Noisy, EMI, RFI, long data cable: 4800/2400 Baud
Short cable (< 300 meters or 975 feet): 19200 Baud
Parity Even/odd/no
Device ID 1
Stop bit 1