Single Phase Energy Meter
Installation & Operating Instructions
EM
3490 SS
1. Introduction
Ultra high brightness LED display.
Down
Up
2. Measurement Reading Screen
In normal operation the user is presented with active energy measurement screen.
Screen 1 : Active Energy (kWh)
When x1000 LED glows the energy is displayed in mega watt.
Section
Contents
1.
Introduction
2.
Measurement Reading Screen
4.
Programming
4.1 Password Protection
4.2 Menu selection
4.2.1 System Parameter selection screen
4.2.2 Communication Parameter selection screen
4.2.3 Reset Parameter selection screen
4.2.4 Relay Output parameter selection screen
4.2.5 Quit screen
4.2.1.1 Potential transformer Primary value
4.2.1.2 Potential transformer secondary value
4.2.1.3 Current transformer Primary value
4.2.1.4 Energy Display on modbus
4.2.1.5 Energy Digit Rollover(reset) count
4.2.2.1 Address Setting
4.2.2.2 RS 485 Baud rate
4.2.2.3 RS 485 Parity selection
10.
Specification
Installation
8.1 EMC Installation Requirements
8.2 Case Dimensions and Panel Cut-out
8.3 Wiring
8.4 Auxiliary Supply
8.5 Fusing
8.6 Earth / Ground Connections
9.
11.
Connection for Optional Pulse output / RS 485
8.
Phaser Diagram
4.2.3.1 Resetting Parameter
4.2.4.1 Pulse Duration (width) selection
15000251_Rev.C - 12/ 08
7.
6.
RS 485 (Modbus) Output
5.
Relay Output (Optional).
4.2.4.2 Pulse rate divisor
The instrument is a panel mounted 96 x 96mm DIN Quadratic energy
meter. It accumulates Active energy, in single phase network.
The instrument also measures AC Voltage, AC Current, Frequency,
Power, Power factor, Phase Angle, Apparent Energy which can be accessed via
Modbus. All voltage & Current measurements are True RMS upto 15th harmonic.
Meter can be configured & Programmed at site
for the following :
PT Primary, PT Secondary, CT Primary, Modbus
Settings & Pulse output settings.
The front panel has two push buttons through
which the user can reset the energy & configure
the product.
The front panel has Impulse red led, flashing at
rate proportional to measured power.
Its impulse rate is 3600impulses/kWh.
6.1 User assignable Modbus Register
Network Wiring
5.1 Pulse Output
1
x1000
3600 Imp/KWh
kWh
x1000
kWh
VON IREV
3. Phase Indications
“LED Von glowing”
Voltage Phase present
x1000
kWh
VON IREV
“LED Von off”
Voltage phase absent
x1000
kWh
VON IREV
Measured Parameters
System Voltage
System Current
Frequency
Active Energy
Units of measurement
Volts
Amps
Hz
Wh
TABLE 1:
Apparent Energy
Active Power
Reactive Power
Apparent Power
Power Factor
Phase Angle
Kwatts
KVAr
KVA
Degree
VAh
Display Parameter
Active Energy (8 digit counter)
kWh
Modbus Parameter
Active energy is displayed in 8 digit counter with auto ranging feature. Below given table
describes auto ranging with minimum resolution of energy measured in perticular range.
Display Format
X1000 LED
Minimum resolution
99.999999
999.99999
9999.9999
99999.999
999999.99
9999999.9
99999999
999999.99
9999999.9
99999999
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
1 miliWatt
10 miliWatt
100 miliWatt
1 Watt
10 Watt
100 Watt
1 kiloWatt
10 kiloWatt
100 kiloWatt
1 MegaWatt
Maximum Active energy count reached is 99999999 MegaWatt after this counter
rollovers to zero and measurement starts from first range.
3.
Phase Indications
Impulse led on front panel can be used to cross check the energy calibration on site.
Its nominal impulse rate is 3600 impulses / kWh.
2
VON IREV
3600 Imp/KWh
3600 Imp/KWh
3600 Imp/KWh
“LED IREV glowing”
Current out of phase w.r.t voltage .
x1000
kWh
VON IREV
“LED IREV off”
Current in phase w.r.t voltage
x1000
kWh
VON IREV
3600 Imp/KWh
3600 Imp/KWh
SEL
(Select)
A
: UP KEY
: DOWN KEY
(Select Relay Parameter)
quit
(Exit Menu)
Exit
from setup Parameter to Main
Display
rESEt
(
Reset
Parameter)
non
(
No
Parameter),
E
(Energy),
“Down” key
SEriAL
(
Serial Communication
)
Add
(Modbus Address)
br
(Baud Rate)
Pr
(Parity Bits)
cd
(PassWord)
SEL
(
Select System
Parameter)
(Sec 4.2.2)
UP
(
PT Primary
)
US
(
PT Secondary
)
A
A
(Sec 4.2.1.1)
Setup Parameter Screen
(Sec 4.2.5)
Parameter
(Sec 4.2.2.1)
(Sec 4.2.2.2)
(Sec 4.2.2.3)
(Sec 4.2.3)
SYS
(Sec 4.2.1)
SEL
SEL
(Sec 4.2.4)
rELAY
SEL
dur
( Relay Pulse Duration)
rAt
(Pulse Rate Divisor)
(Sec 4.2.4.1)
(Sec 4.2.4.2)
AP
(CT Primary)
(Sec 4.2.1.3)
(Sec 4.2.1.2)
(Sec 4.2.3.1)
