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Help CenterE650 E850 Landis Gyr Industrial Meter Multi Function Settlement Meter ZMQ202 ZMD402 Gateway
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The Landis E850 series of high-end gateway settlement watt-hour meters are specially used for gateway settlement of regional power grids and power plants with high voltage levels, as well as large industrial and commercial users such as electrified railways with frequent load changes. With excellent measurement accuracy, significantly high refresh rate, and long-term stable and reliable operation, they have successfully won the unanimous praise and trust of users around the world.
Widely used in:
Gateway power grids and substations in provinces across the country.
● State Grid UHV and China Southern Grid EHV.
● Guangdong-Hong Kong cross-border power grid, Zhuhai-Macao cross-border power grid, Guangdong-Hainan cross-sea power grid.
● Nuclear power, thermal power, wind power, hydropower, photovoltaic and other power plants, the Three Gorges Hydropower Station on the Yangtze River, pumped storage and other projects.
● Traction station projects on numerous high-speed rail lines.
Basic Functions
● Accuracy 0.2S level
● Application CT/PT connection
● Massive data records
42 test data
42 test data
40 frozen power curves
Power Factor Register
Flow direction register
Power loss
41 diagnostic data
U, l, F, harmonic voltage, current
24 rate registers
4 demand registers P, Q or S
Maximum demand register
64-register power quality voltage sag meter
Can record 256 events and alarms of 128 different types
● Standard features
Three-phase PT circuit and auxiliary power supply are powered in parallel to achieve uninterrupted switching (optional auxiliary power supply is independent)
Internal real-time clock with power backup
Installation support display
One meter with multiple ranges (configurable)
Two sets of load curves (different integration periods)
Contactless meter reading
Supercapacitor can support internal clock operation for more than 20 days
Programmable main pulse output terminal
LCD display with backlight
● Advanced features
Instantaneous value measurements, including voltage, current, phase angle, power factor and grid frequency
Harmonic measurement, including 30th harmonic voltage, current and active energy
Loss measurement
Monitor alarm light indication, can also be set as relay output node
Phase loss and phase sequence error warning
Each phase pressure loss monitoring alarm, etc.
● Configurable communication unit CU
model |
Interface Type |
Regulations |
Z6 |
RS485, RS485 |
DL/T645(97/07), DLMS, IEC1107 |
Z8 |
RS485, RS485, RS485 |
DL/T645(97/07), DL/T698.45, DLMS, IEC1107 |
XE |
10/100BASE-TX, RS485/RS422, RS232 |
DLMS, Modbus, IEC608 70-5-104, DLT860 (61850) |
● Typical technical data
Measurement accuracy: active 0.2S level, reactive 0.5/1.0 level
Reference voltage |
Un 3 x 100V, 3 x 110V, 3 x 115V, 3 x 220V, 3 x190V~3 x 230V (user-defined) |
Measuring voltage range |
70%-115%Un |
Nominal current |
0.31.2)A, 0.3(6)A, 1(2)A, 1.5(6)A, 5(6)A |
Starting current |
0.05%In (standard value) |
Typical power consumption |
Current loop 1A: 0.004VA: 5A: 0.09VA; Voltage loop 0.9VA (0.5W) (standard auxiliary power mode) 1.4VA (0.8W) (auxiliary power supply + output contact + communication module) |
Nominal frequency |
fin 50/60Hz, working range 90%~110% |
Auxiliary power supply |
110-220V AC/DC, 24-125V AC/DC (optional) Maximum power consumption 6VA |
Calendar clock |
Accuracy [5ppm (25°C): Battery powered operation time 10 years: Supercapacitor (no battery) operation] 20 days |
interface |
Support 3 independent RS485 interfaces |
Protection level |
IP51 |
Installation Dimensions |
173mm(W) x 281.6mm(H) x 75mm(D) |
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