Delixi CDI-SPD Series, Руководство пользователя

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Chapter
Ⅲ
Installation and Wiring
Page 17
3.3 Earthing
1. Earthing resistance:
200 V level: 100 Ω or below
400 V level: 10 Ω or below
2. Don’t earth frequency Inverter, electric welder, motor or other large-current
electrical equipment commonly. Make sure all earth wires inside conduit are laid
separately from the leads of large-current electrical equipment.
3. Use earth wires up to the specified standard and shorten their length as much
as possible.
4. When several frequency Inverters are used in a row, please earth the device
as shown in Fig. (a) and Don’t make earth wires form a circuit as shown in Fig. (c).
5. Frequency Inverters and motors shall be earthed according to the connections
given in Fig. (d).
(a) Correct (b) Incorrect (c) Not recommended
(d) Correct (e) Not recommended
6. Wiring inspection:
Inspect the following items after installation and wiring are completed.
A. Check if the wiring is correct.
B Check if there is broken wire residues or screws left inside the device.
C Check if the screws are tightened firmly.
D Check if the naked leads on terminal contact with other terminals.