Specifications

T4.40
GE Power Controls
Comfort Functions
T4
Net analysers (Multi Meters)
The series MT DN 1 and MT DN 3 are electronic
instruments especially developed for measuring and
controlling several electrical parameters such as
voltage, current, power, energy, harmonic distortion
in a single or three phase network.
All the measured values can be viewed in real time
on the analyser display or transmitted to a remote
display (PC/PLC) through a serial interface RS 485
(except the harmonic waves).
Technical features
Operation
Display and programming of the various parameters
is done by 3 keys:
- UP (next)
- DOWN (previous)
- ENTER (confirmation on parameter alteration).
Press ENTER to light up the display.
With the display illuminated, the first page shows
voltage, current, active power and power factor for
all phases.
L1 L2 L3
3xV 0000 0000 0000
3xA 0000 0000 0000
3xW 0000 0000 0000
3xPf 0000 0000 0000
By pressing UP, the second page displays the
apparent, reactive and active power and cos ϕ for
all phases.
L1 L2 L3
3xVA 0000 0000 0000
3xVAR 0000 0000 0000
3xW 0000 0000 0000
3xPf 0000 0000 0000
By pressing UP again, the third page shows the total
values of the power, frequency and the cos ϕ.
‘t1’ is the time integration (0-15 min.) of the values
of IPM and IPL shown on the fifth subpage (see below).
totals: (t1 15 min.)
VA 0000
VAR 0000 Fr 0000 Hz
W 0000 Pft 0000 ind (cap)
By pressing UP once more, the fourth page shows
the total values (import or export) of the active and
reactive energy. The arrows inform about the actual
function of the analyser.
+kWh (T)> 00000000.00
+kVARh (T)> 00000000.00
-kWh (T)> 00000000.00
-kVARh (T)> 00000000.00
By pressing ENTER, the first subpage shows the
values of the active/reactive energy of the 1st tariff
meter.
+kWh (1) 00000000.00
+kVARh (1) 00000000.00
-kWh (1) 00000000.00
-kVARh (1) 00000000.00
By pressing ENTER, the second subpage shows the
values of the active/reactive energy of the 2nd tariff
meter.
+kWh (2) 00000000.00
+kVARh (2) 00000000.00
-kWh (2) 00000000.00
-kVARh (2) 00000000.00
Electrical parameters
Current
Active power
Reactive power
Frequency
Apparent power
Power factor
Total active power
Total reactive power
Total apparent power
Total power factor
Harmonic distorsion
(numerical and graphic)
Total harmonic distorsion
Voltage crest factor
Current crest factor
Totals integrated on time
of S-Q-P-Pf-F
Computed values
S1-S2-S3 (VA)
Pf1-Pf2-Pf3 (cos ϕ)
Pt (W)
Qt (VAR)
St (VA)
Pft (cos ϕ)
3xV and 3xI
(h1…h15%)
3xVthd and 3xIthd (%)
3xVcrs
3xIcrs
The above measured values change automatically when the voltage and current ratios change
Measured values
I1-I2-I3 (A)
P1-P2-P3 (W)
Q1-Q2-Q3 (VAR)
Fr (Hz)
Analyser version
Display
Voltage input
Secondary current
Measure method
Elaboration time
Class
Serial communication
Protocol
Memory
Address no.
Power supply
Consumption
Dimensions
V:427
LCD back illuminated high performance
4 lines x 20 columns
alphanumerical characters
FFT semigraphic
150V - 300V - 600V
5A RMS (1A rms on request)
128 scannings/period
(for the 3 currents and 3 voltages)
200 ms
0.5% for voltage and current
0.3% for frequency
1% other parameters
RS 485 (2 wires op to insulated), 9600 baud
MODBUS (other on request)
EEPROM 2kB
0... 255
230V + 10%/-20%
(other on request)
< 5VA
8 modules