Emerson MEV2000 new original



Inverter installation environment

Installed in indoor, well-ventilated places, generally should be installed vertically.

When selecting an installation environment, note the following:

The ambient temperature must be in the range of -10 ° C to 40 ° C. If the temperature exceeds 40 ° C, external heat dissipation or derating is required.

Humidity requirements less than 90%, no condensation:

Install in places with vibration less than 5.9 m/s 2(0.6g);

Avoid installation in direct sunlight;

Avoid installation in places with dust and metal powder:

It is strictly prohibited to install in places with corrosive and explosive gases:

If there are special installation requirements, please consult and confirm in advance.

Overvoltage protection of control circuits - long cables and wiring on the outside of the building

The input/output port of the inverter control line is a universal design, suitable for use within the equipment and small system scope.

If the OV lines are not grounded, they meet the requirements of EN61000-6-2(1kV surge).

In applications where these lines may be exposed to high surges, special measures need to be taken to prevent failure and damage. Overvoltage can be caused by transient high voltages between different ground points caused by lightning or power failures.

The danger increases if the circuit extends beyond the building.

As a rule, if the circuit extends out of the building where the inverter is located, or the cable is longer than 30m in the building, some additional precautions need to be taken. Any of the following technologies can be used:

1, Galvanic insulation, that is, do not ground the 0V control terminal. Avoid loop formation of control cables. For example, the signal input and output lines are twisted together to avoid forming a loop.

2. The shielded cable comes with an additional power grounding connection. The cable shield layer may be grounded at both ends, but in addition the grounding lead of the cable terminal shall be connected with a power ground cable [equipotential connection cable], with a cross-sectional area of at least 10mm2, or equivalent to 10 times the shielding area of the signal cable, or set according to the factory electrical safety regulations. This ensures that the fault or overvoltage current is mainly shielded through the ground cable rather than the signal cable. This measure is not necessary if the building itself is properly designed to connect to the network.

3. Additional overvoltage suppression - For analog and digital input and output, the regulator diode network or commercially used overvoltage suppressor input circuits can be connected in parallel, and the digital port's fault protection will be activated in case of severe overvoltage. If the operation continues, the control word or terminal setting can be set to automatically reset the fault.

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