Wiring Notes - Watt Drive V2500 Series Manual

3.5 Wiring Notes:

1. CAUTION: Do not connect the AC power to the U/T1, V/T2, W/T3 terminals, as
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it will damage the AC drive.
2. WARNING: Ensure all screws are tightened to the proper torque rating.
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3. During installation, follow all local electrical, construction, and safety codes for the
country the drive is to be installed in.
4. Ensure that the appropriate protective devices (circuit breaker or fuses) are
connected between the power supply and AC drive.
5. Make sure that the leads are connected correctly and the AC drive is properly
grounded. (Ground resistance should not exceed 0.1 Ω.)
6. Use ground leads that comply with AWG/MCM standards and keep them as short as
possible.
7. Multiple V2500 units can be installed in one location. All the units should be grounded
directly to a common ground terminal. The V2500 ground terminals may also be
connected in parallel, as shown in the figure below. Ensure there are no ground
loops.
8. When the AC drive output terminals U/T1, V/T2, and W/T3 are connected to the
motor terminals U/T1, V/T2, and W/T3, respectively, the motor will rotate
counterclockwise (as viewed from the shaft ends of the motor) when a forward
operation command is received. To reverse the direction of motor rotation, switch
over any of the two motor leads.
9. Make sure that the power source is capable of supplying the correct voltage and
required current to the AC drive.
10. Do not attach or remove wiring when power is applied to the AC drive.
11. Do not monitor the signals on the circuit board while the AC drive is in operation.
12. For the single-phase rated AC drives, the AC power can be connected to any two of
the three input terminals R/L1, S/L2, T/L3. Note: This drive is not intended for the
use with single-phase motors.
13. Route the power and control wires separately, or at 90°angle to each other.
14. If a filter is required for reducing EMI (Electro Magnetic Interference), install it as
close as possible to AC drive. EMI can also be reduced by lowering the Carrier
Frequency.
15. If the AC drive is installed in the place where a load reactor is needed, install the filter
close to U/T1, V/T2, W/T3, side of AC drive. Do not use a Capacitor or L-C Filter
(Inductance-Capacitance) or R-C Filter (Resistance-Capacitance), unless approved
by Watt Drive.
16. When using a GFCI (Ground Fault Circuit Interrupt), select current sensor with
sensitivity of 200mA, and not less than 0.1-second detection to avoid nuisance
tripping.
PLEASE READ PRIOR TO INSTALLATION.
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