7 Electrical Installation
YASKAWA TOEPC7106171FD FP605 DRIVE INSTALLATION & PRIMARY OPERATION 31
Note:
Drive models 2211 to 2396 and 4180 to 4720 have an unmarked terminal next to terminal +1. You cannot use this terminal for main circuit
wiring.
A - Models: 2211, 2273, 4180 to 4302
B - Models: 2343, 2396, 4361, 4414
C - Models: 4477 to 4720
D - Unmarked terminal
◆ Main Circuit Terminal Block Wiring
■ Wire Selection
Select the correct wires for main circuit wiring.
Refer to Main Circuit Wire Gauges and Tightening Torques on page 91 for wire gauges and tightening torques as
specified by European standards.
Refer to Wire Gauge and Torque Specifications for UL Listing on page 32 for wire gauges and tightening torques as
specified by UL standards.
Wire Selection Precautions
WARNING
Electrical Shock Hazard. Make sure that the protective ground wire complies with technical standards and local
safety regulations. The IEC/EN 61800-5-1:2007 standard specifies that you must wire the power supply to automatically de-
energize when the protective ground wire disconnects. You can also connect a protective ground wire that has a minimum cross-
sectional area of 10mm
2
(copper wire) or 16 mm
2
(aluminum wire). For drive models on which you cannot use a protective ground
wire of 10 mm
2
or more, install two protective ground wires that have the same cross-sectional area. If you do not obey the
standards and regulations, it can cause serious injury or death. The leakage current of the drive will be more than 3.5 mA.
Think about line voltage drop before you select wire gauges. Select wire gauges that drop the voltage by 2% or less of
the rated voltage. Increase the wire gauge and the cable length when the risk of voltage drop increases. Calculate line
voltage drop with this formula:
Line voltage drop (V) = × wire resistance (Ω/km) × wiring distance (m) × motor rated current (A) × 10
-3
.
Precautions during Wiring
Use terminals +1 and - to connect a regenerative converter or regenerative unit.
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