Landis+Gyr E650 Electricity Meters

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

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)

❓ Frequently Asked Questions (FAQ)

1. What is an AMI smart metering system?

AMI is an advanced system that enables two-way communication between smart electricity meters and utility management platforms for real-time data collection and remote control.

2. What is the difference between AMR and AMI?

AMR (Automatic Meter Reading) only collects data one-way, while AMI allows two-way communication, enabling remote configuration, diagnostics, and real-time monitoring.

3. Can Landis+Gyr E650 be used in AMI systems?

Yes. The E650 smart meter is fully compatible with AMI infrastructure and supports DLMS/COSEM and multiple communication modules for integration.

4. How is data transmitted in the AMI system?

Data is transmitted through RF, PLC, cellular networks (4G/NB-IoT), or hybrid communication systems depending on project requirements.

5. Is the system suitable for large-scale utility deployment?

Yes. AMI systems are designed for mass deployment, supporting thousands to millions of smart meters in a centralized platform.

6. Can the system detect energy theft or tampering?

Yes. The system includes anti-tamper detection features such as magnetic interference, reverse energy flow, and meter cover opening alarms.

7. Can the platform integrate with existing utility software?

Yes. The system supports API, MQTT, and standard communication protocols for integration with SCADA, ERP, and utility billing systems.

8. Is remote firmware upgrade supported?

Yes. Many AMI systems support OTA (Over-the-Air) firmware upgrades, enabling remote maintenance and system optimization.

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