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Chapter 5 Main Circuit TerminalsCFP2000
Fasten the screws in the main circuit terminal to prevent sparks condition made by the
loose screws due to vibration.
When it needs to install the filter at the output side of terminals U/T1, V/T2, W/T3 on
the AC motor drive, please use inductance filter. Do not use phase-compensation
capacitors or L-C (Inductance-Capacitance) or R-C (Resistance-Capacitance), unless
approved by Delta.
DO NOT connect phase-compensation capacitors or surge absorbers at the output
terminals of AC motor drives.
DO NOT connect [+1, -], [+2, -], [+1/DC+, -/DC-] or brake resistor directly to prevent
drive damage.
Ensure the insulation of the main circuit wiring in accordance with the relevant safety
regulations.
Main power terminals
Do not connect three-phase model to one-phase power. R/L1, S/L2 and T/L3 has no
phase-sequence requirement, it can be used upon random selection.
It is recommended to add a magnetic contactor (MC) to the power input wiring to cut
off power quickly and reduce malfunction when activating the protection function of
the AC motor drive. Both ends of the MC should have an R-C surge absorber.
Please use voltage and current within the specification.
When using a general GFCI (Ground Fault Circuit Interrupter), select a current sensor
with sensitivity of 200 mA or above and not less than 0.1-second operation time to
avoid nuisance tripping.
Please use the shield wire or tube for the power wiring and ground the two ends of the
shield wire or tube.
Do NOT run/stop AC motor drives by turning the power ON/OFF. Run/stop AC motor
drives by RUN/STOP command via control terminals or keypad. If you still need to
run/stop AC motor drives by turning power ON/OFF, it is recommended to do so only
ONCE per hour.
Connect the drive to a three-phase three-wire or three-phase four-wire Wye system to
comply with UL standards.
Output terminals for main circuit
Use well-insulated motor, suitable for inverter operation.
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 on the shaft end of the motor, refer to the pointed direction in the figure
below) when a forward operation command is received. To permanently reverse the
direction of motor rotation, switch over any of the two motor leads.
Figure 5-1
5-2
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