2.2 Wiring
2-13
The following terminals will have high voltage when power is ON.
Main circuit: L1/R, L2/S, L3/T, P1, P(+), N(-), DB, U, V, W, R0, T0, AUX-contact (30A, 30B, 30C, Y5A, Y5C)
Insulation level
Main circuit - casing : Basic insulation (overvoltage category III, pollution degree 2)
Main circuit - control circuit : Reinforced insulation (overvoltage category III, pollution degree 2)
Contact output - control circuit : Reinforced insulation (overvoltage category II, pollution degree 2)
Failure to observe this could result in electric shock.
[ 3 ] Recommended wire size (main circuit terminals)
The following wires are recommended unless special requirements exist.
If using in an ambient temperature of 50 to 55 °C (122 to 131 °F), select wires by referring to the 55 °C field
in Appendix F “Allowable Current of Insulated Wires” in “APPENDICES”.
■ 600 V polyvinyl chloride insulated wire (IV wire)
This wire is used in circuits except the inverter control circuit. The wire is difficult to twist and is not recommended
for the inverter control circuit. The maximum permissible temperature for the insulated wire is 60 °C (140 °F).
■ 600 V heat-resistant polyvinyl chloride wire (HIV wire)
In comparison to the IV wire, this wire is smaller, more flexible, and the maximum permissible temperature for the
insulated wire is 75 °C (167 °F) (higher), making it suitable for both the inverter main circuit and control circuit.
However, the wiring distance should be short and the wire must be twisted for use in the inverter control circuit.
■ 600 V cross-linked polyethylene insulated wire (FSLC wire)
This wire is used mainly in the main circuit and the grounding circuits. The size is even smaller than the IV wire or
the HIV wire and also more flexible. Due to these features, the wire is used to reduce the area occupied by wiring
and to improve work efficiency in high temperature areas. The maximum permissible temperature for the insulated
wire is 90 °C (194 °F). As a reference, Furukawa Electric Co., Ltd. produces Boardlex which satisfies these
requirements.
■ Shielded-twisted wire for internal wiring of electronic/electrical equipment
This product is used in inverter control circuits. Use this wire with high shielding effect when risk of exposure to or
effect of radiated noise and induced noise exists. Always use this wire when the wiring distance is long, even within
the cabinet. Furukawa Electric’s BEAMEX S shielded cables XEBV or XEWV satisfy these requirements.
Table 2.2-2 Recommended wire sizes (common terminals)
Recommended wire size (mm
2
) [AWG]
Control power auxiliary input terminals R0, T0
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