Rockwell Automation 160 SSC Series C FRN 7.xx - Manual (Page 20)

2-8 Installation and Wiring
Capacitive Current Coupling
AC coupling exists from motor cables to ground terminal/protective earth. The
current produced by this coupling is referred to as capacitive current. The drive
current is the combination of capacitive current and motor current. Because motor
current is monitored for overload protection, the table below lists the maximum
cable length recommendations that will assure a capacitive current error of less
than 15 percent.
Cable Length Recommendations — Capacitive Current Table 2.F
➊ Not recommended for use above 4 kHz PWM Frequency.
➋ When using shielded cable at lightly loaded conditions, cable length recommendations for drives rated 0.75 kW (1 HP) and
below are 61 meters (200 feet).
➌ Not recommended for 230V applications.
380-460V
Ratings kHz Motor Cable Only RWR at Drive ➊ Reactor at Motor
Shielded
➋
Unshielded Shielded
➋
Unshielded Shielded
➋
Unshielded
feet meters feet meters feet meters feet meters feet meters feet meters
4.0 kW
(5 HP) 2 350 107 600 183 300 91.5 600 183 400 122 600 183
4 425 130 600 183 350 107 600 183 450 137 600 183
8 475 145 500 152 ➊ 450 137 500 152
2.2 kW
(3 HP) 2 360 110 600 183 280 85.4 600 183 400 122 600 183
4 375 114 600 183 275 83.8 600 183 400 122 600 183
8 400 122 500 152 ➊ 400 122 500 152
1.5 kW
(2 HP) 2 300 91.5 550 168 275 83.8 600 183 300 91.5 600 183
4 300 91.5 550 168 275 83.8 600 183 300 91.5 500 152
8 325 99.1 500 152 ➊ 350 107 500 152
0.75 kW
(1 HP) 2 200 61 375 114 200 61 425 130 225 68.6 400 122
4 225 68.6 375 114 200 61 425 130 225 68.6 375 114
8 250 76.2 375 114 ➊ 225 68.6 400 122
0.55 kW
(0.75 HP) 2 180 54.9 350 107 180 54.9 375 114 180 54.9 350 107
4 180 54.9 350 107 180 54.9 375 114 180 54.9 350 107
8 180 54.9 350 107
➊
180 54.9 350 107
0.37 kW
(0.5 HP) 2 100 30.5 325 99.1 100 30.5 350 107 100 30.5 300 91.5
4 100 30.5 325 99.1 100 30.5 350 107 100 30.5 350 107
8 100 30.5 325 99.1 ➊ 100 30.5 350 107
200-240V Ratings No Reactor RWR at Drive ➊ Reactor at Motor
0.37 to 4.0 kW
(0.5 to 5 HP)
2 through 8 kHz Shielded ➋ Unshielded Shielded ➋ Unshielded Shielded ➋ Unshielded
feet meters feet meters feet meters feet meters feet meters feet meters
525 160 600 183
➌
525 160 600 183