The LEM052 series electronic meter is advanced front panel mounted single phase electronic active energy meters. The designs of LEM052 series electronic meter is based on the well-known model LEM051 series, fully absorbing the new technologies of electronic meters from home and abroad. LEM052 series electronic meter technical performances completely conform to International Standards IEC 62053-21 for Class 1 single phase active energy meter. LEM052 series electronic meter can directly and accurately measure the load active energy consumption in the single phase AC networks of rated frequency 50Hz or 60Hz and used indoors or in the meter box outdoors. The LEM052 series electronic meter has multiple configurations for option, to be suitable with the various market demands. LEM052 series electronic meter has features with excellent long-term reliability, small volume, light weight, perfect appearance, easy installation, etc.

Functions and features

√ LEM052 series electronic meter; Front panel mounted in 3 points for fixing. The centre-to-centre distance between the top mounting holes and the bottom one is 130 – 147 mm, which the user can select any needed distance, in accordance with Standards BS 7856 and DIN 43857.
√ LEM052 series electronic meter; Can select the step motor impulse register of 5+1 digits (99999.1kWh) or 6+1 digits (999999.1kWh) LCD display.
√ LEM052 series electronic meter; Can select the maintenance free lithium battery inside for LCD display to read the meter while the power is cut.
√ LEM052 series electronic meter; Equipped with a polarity passive energy impulse output terminal, conforming to Standards IEC 62053-31 and DIN 43864.
√ LEM052 series electronic meter; LEDs indicate the power state (green) and the energy impulse signal (red).
√ LEM052 series electronic meter; Automatic detection for the load current flow direction and will be indicated by LED.
√ LEM052 series electronic meter; Measure the active energy consumption in one direction on single phase two wire or single phase three wire, which is not related with the load current flow direction at all, complying with Standards IEC 62053-21.
√ LEM052 series electronic meter; Direct connection. For single phase two wire, two types of connections: type 1A and type 1B for option. For single phase three wire, the connection is type 2A.
√ LEM052 series electronic meter; Can select the extended terminal cover or short terminal cover.

Technical parameters

    Technical parameters
Model Accuracy Reference voltage (V) Current specifications (A) Starting current (A) Insulation performance
LEM052XX Class 1 127 or 230 CT/5
AC voltage 4kV for 1 minute, 
1.2/50us waveform impulse voltage 6kV.

Outer and mounting dimension

Outer and mounting dimension

Wiring diagram

  Wiring diagram -1 (type 1B)

Terminal Note
1 Inlet phase wire
3 Outlet phase wire
4 Inlet neutral wire
6 Outlet neutral wire
2 and 5 Passive energy impulse output port

  Wiring diagram -2 (type 1A)
Terminal Note
1 Inlet phase wire
3 Inlet neutral wire
4 Outlet neutral wire
6 Outlet phase wire
2 and 5 Passive energy impulse output port

  Wiring diagram -3 (type 2A)
Terminal  Note 
1 Inlet on Phase wire L1
3 Inlet on Phase wire L2
4 Outlet on Phase wire L2
6 Outlet on Phase wire L1
2 and 5 Passive energy impulse output port

Product configuration table

  Product configuration table
Configuration Options Configuration Code

5+1 digits step motor impulse register

6+1 digits LCD

LCD display to read the meter when power is cut

Measuring the active energy on single phase two wire

Measuring the active energy on single phase three wire

Outer and mounting dimension - Picture 1

Outer and mounting dimension - Picture 2

Wiring diagram -1 (type 1B)

Wiring diagram -2 (type 1A)

Wiring diagram -3 (type 2A)