Secondary PT setting
The setting method is same
as Primary voltage setting
PT1. Max PT2 value is 500V
Set PT Ratio Value
Press to enter the
PT Ratio. The range is from
0001~9999.
From the Set-up menu, use
and buttons
to select the PT option.
The screen will show the
voltage PT secondary
voltage value.
Press to exit the system selection routine and return
to the menu. SET will disappear and you will be returned to
the main Set-up Menu.
4.7 Pulse Output
This option allows you to configure the pulse output. The
output can be set to provide 2 pulses, Pulse 1 is lock to C1,
and Pulse 2 is lock to C2. The setting will be effective for both
pulse outputs. Use this section to set up the pulse output
(Units: kWh, kVarh)
From the Set-up menu, use
and buttons
to select the Pulse output
option.
Press to enter the
selection routine. The unit
symbol will flash.
Use and
buttons to choose kWh
or kVArh.
On completion of entry procedure, press to confirm
the setting and press to return to the main set
up menu.
4.7.1 Pulse Rate
Use this to set the energy represented by each pulse. Rate can
be set to 1 pulse per 0.01/0.1/1/10/100/1000kWh/KVArh.
(It shows 1 impulse =
10kWh/kVArh)
Press to enter the
selection routine. The cur-
rent setting will flash. Use
and and buttons
to choose pulse rate.
From the Set-up menu, use
and buttons
to select the Pulse Rate
option.
On completion of the entry procedure, press to
confirm the setting and press to return to the main
set up menu.
4.7.2 Pulse Duration
The energy monitored can be active or reactive and the pulse
width can be selected as 200, 100 or 60ms.
(It shows pulse width
of 200ms)
From the Set-up menu, use
and buttons
to select the Pulse width
option.
Press to enter the se-
lection routine. The current
setting will flash.
200/100/60ms
Use and
buttons to choose pulse
width.
On completion of the entry procedure, press to
confirm the setting and press to return to the main
set up menu.
4.8 Communication
There is a RS485 port can be used for communication using
Modbus RTU protocol. For Modbus RTU, parameters are
selected from Front panel.
From the Set-up menu, use
and buttons to
select the Address ID.
Press to enter
the selection routine. The
current setting will be
flashing.
Use and
buttons to choose Modbus
Address (001 to 247).
On completion of the entry procedure, press button
to confirm the setting and press button to return to
the main set-up menu.
4.8.2 Baud Rate
From the Set-up menu, use
and buttons to
select the Baud rate option.
Press to enter
the selection routine. The
current setting will flash.
Use and
buttons to choose Baud
rate 2.4k, 4.8k, 9.6k, 19.2k,
38.4k.
On completion of the entry procedure, press to
confirm the setting and press to return to the main
set-up menu.
4.8.3 Parity
From the Set-up menu, use
and buttons to
select the Parity option.
Press to enter
the selection routine. The
current setting will flash.
Use and
buttons to choose Parity
(EVEN / ODD / NONE).
Default is NONE.
On completion of the entry procedure, press to
confirm the setting and press to return to the main
set-up menu.
4.8.4 Stop Bits
From the Set-up menu, use
and buttons to
select the Stop Bit option.
Press to enter
the selection routine. The
current setting will flash.
Use and
buttons to choose Stop Bit
(2 or 1).
On completion of the entry procedure, press to
confirm the setting and press to return to the main
set-up menu.
5. Specifications
5.1 Measured Parameters
The unit can monitor and display the following parameters of
a single phase, 3-phase 4-wire supply.
5.1.1 Voltage and Current
•
Phase to neutral voltages 100 to 289V a.c.
•
Voltages between phases 173 to 500V a.c.
•
Percentage total voltage harmonic distortion (THD%) for
each phase to N
•
Percentage voltage THD% between phases
•
Current on each phase – 1 to 9999A range, set by external
current transformer(s) (CTs)
•
Current THD% for each phase
5.1.2 Power Factor and Frequency and
Max. Demand
•
Frequency in
•
Hz Instantaneous power
•
Power 0 to 3600 MW
•
Reactive Power 0 to 3600 MVAr
•
Volt-amps 0 to 3600 MVA
•
Maximum demanded power since last
•
Demand reset Power factor
•
Maximum neutral demand current, since the last Demand
reset
5.1.3 Energy Measurements
•
Imported active energy
0 to 9999999.9 kWh
•
Exported active energy
0 to 9999999.9 kWh
•
Imported reactive energy
0 to 9999999.9 kVArh
•
Exported reactive energy
0 to 9999999.9 kVArh
•
Total active energy
0 to 9999999.9 kWh
•
Total reactive energy
0 to 9999999.9 kVArh
5.2 Measured Inputs
Voltage inputs through 4-way fixed connector with 2·5mm2
stranded wire capacity. Line frequency measured from L1
voltage or L3 voltage.
Three current inputs (six physical terminals) with 2.5mm2
stranded wire capacity for connection of external CTs.
Nominal rated input current 5A or 1A a.c. Rms.
5.3 Accuracy
Voltage
0.5% of range maximum
Current
0.5% of nominal
Frequency
0.2% of mid-frequency
Power factor
1% of unity (0.01)
Active power (W)
±1% of range maximum
Reactive power (VAr)
±1% of range maximum
Apparent power (VA)
±1% of range maximum
Active energy (Wh)
Class 1 IEC 62053-21
Reactive energy (VARh)
±1% of range maximum
Total harmonic distortion
1% up to 31st harmonic
5.4 Power Supply
Two-way fixed connector with 2.5mm2 stranded wire capacity.
The meter is powered from Phase L1. The user must make
sure the meter Phase 1 has power on.
5.5 Interfaces for External Monitoring
Three interfaces are provided:
•
an RS485 communication channel that can be programmed
for Modbus RTU protocol.
•
an output indicating real-time measured energy.
(configurable)
•
an pulse output 3200imp/kWh (not configurable).
The Modbus configuration (Baud rate etc.) and the pulse
output assignments (kW/kVArh, import/export etc.) are
configured through the Set-up screens.
5.5.1 Pulse Output
The pulse output can be set to generate pulses to represent
kWh or kVArh.
Rate can be set to generate 1 pulse per:
0.01 = 10 Wh/VArh
0.1 = 100 Wh/VArh
1 = 1 kWh/kVArh
10 = 10 kWh/kVArh
100 = 100 kWh/kVArh
1000 = 1000 kWh/kVArh
Pulse width 200/100/60 ms.
5.5.2 RS485 Output for Modbus RTU
For Modbus RTU, the following RS485 communication
parameters can be configured from the Set-up menu:
Baud rate 2400, 4800, 9600, 19200, 38400
Parity none/odd/even
Stop bits 1 or 2
RS485 network address nnn – 3-digit number, 001 to 247
MyMeters.com
Unit 4, 59 Beattie St, Kallangur QLD 4503 Australia
Tel: 1300 METERS (1300 638 377)
Email: [email protected]
web: www.mymeters.com
MID
7.3 Six Circuits Single Phase Two Wire
7.2 One Circuit Three Phase Four Wire +
Three Circuits Single Phase Two Wire
7.1 Two Circuits Three Phase Four Wire
7. Installation
6. Dimensions
105mm
35mm
92mm
65mm
4.8.1 RS485 Address
(The range is from 001 to 247)
4.9 CLR
The meter provides a function to reset the maximum demand
value of current and power.
From the Set-up menu, use
and buttons to
select the reset option.
Press to enter the
selection routine. The dlt
will flash.
Press button to confirm the setting and press
to return to the main set up menu.
Modbus™ Word order Hi/Lo byte order is set automatically
to normal or reverse. It cannot be configured from the
set-up menu.
5.6 Reference Conditions of Influence
Quantities
Influence Quantities are variables that affect measurement
errors to a minor degree. Accuracy is verified under nominal
value (within the specified tolerance) of these conditions.
•
Ambient temperature
23°C ±1°C
•
Input waveform
50 or 60Hz ±2%
•
Input waveform
Sinusoidal (distortion
factor < 0.005)
•
Magnetic field of external origin Terrestrial flux
5.7 Environment
•
Operating temperature
-25°C to +55°C*
•
Storage temperature
-40°C to +70°C*
•
Relative humidity
0 to 90%, non-condensing
•
Altitude
Up to 3000m
•
Warm up time
1 minute
•
Vibration
10Hz to 50Hz, IEC 60068-
2-6, 2g
•
Shock
30g in 3 planes
CT3
CT2
CT1
CT3
CT2
CT1
Cir
cuit 1
Cir
cuit 2
N L3 L2 L1
1a fast blow fuses
CT input for Circuit 1
CT input for Circuit 2
L32 L31 L22 L21 L12 L11
L32 L31 L22 L21 L12 L11
Voltage Input
Pulse 1 Pulse 2 RS485
N L3 L2 L1
- + - + B A
CT3
CT2
CT1
CT3
CT2
CT1
Cir
cuit 1
Cir
cuit 2
N L3 L2 L1
1a fast blow fuses
CT input for Circuit 1
CT input for Circuit 2
L32 L31 L22 L21 L12 L11
L32 L31 L22 L21 L12 L11
Voltage Input
Pulse 1 Pulse 2 RS485
N L3 L2 L1
- + - + B A
CT3
CT2
CT1
CT3
CT2
CT1
Cir
cuit 1
Cir
cuit 2
N L1
1a fast blow fuses
CT input for Circuit 1
CT input for Circuit 2
L32 L31 L22 L21 L12 L11
L32 L31 L22 L21 L12 L11
Voltage Input
Pulse 1 Pulse 2 RS485
N L3 L2 L1
- + - + B A