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The connection point to be fastened and reliable
- Feb 02, 2018 -

Three-phase electronic energy meter installation requirements

1, the measurement point should be located at the demarcation point of property, the installation point can not have corrosive gas and strong shock and vibration, the environment should be ventilated and dry, electric energy meter operating temperature can not exceed 50 ℃.

2, Meter installed in a dedicated measuring cabinet or table box, the installation height to comply with the specifications, the meter installed in the measuring cabinet at the lower end of the ground can not be less than 1 m, hanging meter box mounted meter away from the bottom Ground can not be less than 1.8 m.

3, meter installed vertically and to be fixed and reliable, the current transformer secondary circuit should be 4 mm2 copper core insulated wire; voltage circuit should be 2.5 mm2 copper insulated wire; ammeter and current, The circuit between the voltage should be connected with a joint junction box, in order to facilitate the meter on-site calibration wiring and measurement troubleshooting.

4, each phase current, voltage transformers must be the same specifications of the product, the phase sequence and polarity of the circuit wiring to be correct, the connection point to be fastened and reliable, transformer and power meter should be installed together in the measurement cabinet or meter box , And do a good job in anti-tampering measures.

5, for the remote telemetry sampling of electronic energy meter, the signal line should be shielded twisted-pair wire, set the signal line will be shielded single-ended ground conductor to improve communication reliability.

6, Where the metal structure of the measuring cabinet, meter box and high-voltage transformer shell must be reliably grounded, the ground wire to use copper wire, the diameter of not less than 2.5 square millimeters.