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Industrial,
commercial and substations
WG.MT/MD8xx
Multifunction
meters with load profile
The WG.MT/MD8xx electronic meter is for industrial customers
and electric utilities.
It complies with IEC 61036 or IEC 60687 standards for
active energy and complise with the IEC 61268 standard
for reactive energy and VDEW requirements. The meter
can be connected directly via CT or via CT and VT in
3-wire networks (MT851,MD851) and 4-wire networks (MT851).
The housing is made of self-extinguishing polycarbonate
(IP51). Dimensions comply with the DIN 43857 standard.
Measured,
calculated quantities and features
- Active energy in two directions.
Reactive energy in four quadrants
- Maximum demand. Actual average
demand. Cumulative maximum demand
- Line voltages. Power factors.
THD of line voltages (MT851 only)
- Content of harmonics in line
voltages (up to 15th - MT851 only)
- Registration of energy and
demand in up to 8 tariffs
- 32 channel load profile recorder
- Log book for different events
registration
- Up to 16 OptoMOS outputs.
Up to 10 optically isolated inputs
- IR optical port, RS232, RS485,
CS (20mA) interfaces
- MeterView software for local
and remote reading and programming
- Load contoller. Callback
function on different events
Technical
Data
Accuracy
KWh-meter...............................class
1(IEC 61036) or class 0.5S(IEC 60687)
Kvarh-meter.............................class 2(IEC
61268) or class 2,calibrated to 1%
| |
direct
connected |
transformer
operated |
| |
class
2 or 1 |
class
1 or 0.5S(only MT851) |
| Basic
current Ib |
5A |
1A |
| Maximum
current Imax |
120A |
6A |
Starting current
whole current meter..........0.004Ib
transformer rated meter....0.002Ib
Reference voltage Ur.........................................3×220/380V,3×230/400V,3×240/415V
3×58/100V,3×63/110V,3×100V,3×110V
Voltage range...................................................0.8Ur
to 1.15Ur
Reference frequency ........................................50Hz
± 5%
Accuracy of quartz controlled RTC (at 25°C
)......≤±3 min/year
(≤±6 ppm)
Memory capacity of load profile..........................84
days at 4 channels and 15-minute demand period
Number of auxiliary terminals.............................up
to 34
Number of inputs...............................................up
to 10
Number of outputs.............................................up
to 16
Operating temperature range...............................-25°C
to +60°C
Storing temperature range.................................
-30°C to +70°C
Current circuit burden........................................<0.1VA
/line
Voltage circuit burden........................................<3W/4VA
Relay ratings.....................................................25VA(100mA,275V)
Dielectric strength..............................................4kV,50Hz
or 60Hz,1min
Impulse voltage..................................................6kV,1.2/50
μs
Short-circuit current............................................30Imax
Burst test..........................................................4kV(IEC
1000-4-4)
Dimensions........................................................327×177×90mm
OVERALL AND FIXING DIMENSIONS
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