3.6 Main Circuit Wiring n Three-Phase 400 V Class Table 3.4 Wire Gauge and Torque Specifications u Main Circuit Terminal Power Supply and Motor Wiring This section outlines the various steps, precautions, and checkpoints for wiring the main circuit terminals and motor terminals. NOTICE: When connecting the motor to the drive output terminals U/T1, V/T2, and W/T3, the phase order for the drive and motor should match. Failure to comply with proper wiring practices may cause the motor to run in reverse if the phase order is backward. NOTICE: Do not connect phase-advancing capacitors or LC/RC noise filters to the output circuits.
Improper application of noise filters could result in damage to the drive. NOTICE: Do not connect the AC power line to the output motor terminals of the drive. Failure to comply could result in death or serious injury by fire as a result of drive damage from line voltage application to output terminals. n Cable Length Between Drive and Motor When the cable length between the drive and the motor is too long (especially at low frequency output), note that the cable voltage drop may cause reduced motor torque. Drive output current will increase as the leakage current from the cable increases.
An increase in leakage current may trigger an overcurrent situation and weaken the accuracy of the current detection. Adjust the drive carrier frequency according to the following table. If the motor wiring distance exceeds 100 m because of the system configuration, reduce the ground currents. Refer to Table 3.5 to set the carrier frequency to an appropriate level. Table 3.5 Cable Length Between Drive and Motor Note: When setting carrier frequency, calculate the cable length as the total distance of wiring to all connected motors when running multiple motors from a single drive. n Ground Wiring Follow the precautions to wire the ground for one drive or a series of drives. WARNING!
Electrical Shock Hazard. Always use a ground wire that complies with technical standards on electrical equipment and minimize the length of the ground wire. Improper equipment grounding may cause dangerous electrical potentials on equipment chassis, which could result in death or serious injury. WARNING! Electrical Shock Hazard. Be sure to ground the drive ground terminal. (200 V Class: Ground to 100 Ω or less, 400 V Class: Ground to 10 Ω or less). Improper equipment grounding could result in death or serious injury by contacting ungrounded electrical equipment. NOTICE: Do not share the ground wire with other devices such as welding machines or large-current electrical equipment.
Improper equipment grounding could result in drive or equipment malfunction due to electrical interference.
38 SIEP C710606 33A OYMC AC Drive – J1000 User Manual Model JZA Terminal Screw Size Tightening Torque N•m (lb.in.) Applicable Gauge mm2 (AWG) Recommended Gauge mm2 (AWG) 21P5 R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, –, +1, +2, B1, B2 M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6 (14 to 10) 2.5 (14) M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6 (14 to 10) 4 (12) 22P2 R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, –, +1, +2, B1, B2, M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6 (14 to 10) 4 (12) 24P0 R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, –, +1, +2, B1, B2, M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6 (14 to 10) 6 (10) Model JZA Terminal Screw Size Tightening Torque N•m (lb.in.) Applicable Gauge mm2 (AWG) Recommended Gauge mm2 (AWG) 40P2 40P4 40P7 41P5 42P2 R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, –, +1, +2, B1, B2, M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6.0 (14 to 10) 2.5 (14) 43P0 R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, –, +1, +2, B1, B2 M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6 (14 to 10) 2.5 (14) M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6 (14 to 10) 4 (12) 44P0 R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, –, +1, +2, B1, B2 M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6 (14 to 10) 2.5 (14) M4 1.2 to 1.5 (10.6 to 13.3) 2.5 to 6 (14 to 10) 4 (12) Cable Length 50 m or less 100 m or less Greater than 100 m Carrier Frequency 15 kHz or less 5 kHz or less 2 kHz or less