Delta C200 Series User Manual page 51

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Chapter 7 Optional Accessories |C200 Series
1. Use the cable with shielding (double shielding is the best).
2. The shielding on both ends of the motor cable should be grounded with the minimum length and maximum
contact area.
3. Remove any paint on metal saddle for good ground contact with the plate and shielding.
The length of motor cable
When motor is driven by an AC motor drive of PWM type, the motor terminals will experience surge voltages easily
due to components conversion of AC motor drive and cable capacitance. When the motor cable is very long
(especially for the 460V series), surge voltages may reduce insulation quality. To prevent this situation, please
follow the rules below:
Use a motor with enhanced insulation.
Connect an output reactor (optional) to the output terminals of the AC motor drive
The length of the cable between AC motor drive and motor should be as short as possible (10 to 20 m or less)
For models 7.5hp and above:
Insulation level of motor
460VAC input voltage
230VAC input voltage
For models 5hp and less:
Insulation level of motor
460VAC input voltage
230VAC input voltage
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Remove any paint on metal saddle for good ground contact with
the plate and shielding.
saddle
Saddle on both ends
Saddle on one end
1000V
66 ft (20m)
1312 ft (400m)
328 ft (100m)
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the plate with grounding
Figure 1
Figure 2
1300V
328 ft (100m)
1312 ft (400m)
1000V 1300V
66 ft (20m) 165 ft (50m)
328 ft (100m)
7-10
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1600V
1312 ft (400m)
1312 ft (400m)
1600V
165 ft (50m)
328 ft (100m)
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