Delta MS300 Series User Manual page 31

Chapter 4 WiringMS300
After removing the front cover, verify that the power and control terminals are clearly noted. Read the
following precautions before wiring.
 Turn off the AC motor drive power before doing any wiring. A charge with
hazardous voltages may remain in the DC bus capacitors even after the power has
been turned off for a short time. Measure the remaining voltage with a DC
voltmeter on +1/DC+ and DC- before doing any wiring. For your safety, do not start
wiring before the voltage drops to a safe level (less than 25 V
with a residual voltage may cause personal injury, sparks and a short circuit.
 Only qualified personnel familiar with AC motor drives are allowed to perform
installation, wiring and commissioning. Make sure the power is turned off before
wiring to prevent electric shock.
 Make sure that power is only applied to the R/L1, S/L2, and T/L3 terminals. Failure
to comply may result in damage to the equipment. The voltage and current must be
in the range indicated on the nameplate (refer to Section 1-1 Nameplate
Information for details).
 All units must be grounded directly to a common ground terminal to prevent
damage from a lightning strike or electric shock and reduce noise interference.
 Tighten the screws of the main circuit terminals to prevent sparks caused by
screws loosened due to vibration.
 For you safety, choose wires that comply with local regulations when wiring.
 Check the following items after finishing the wiring:
3.
4.
5.
Are all connections correct?
Are there any loose wires?
Are there any short circuits between the terminals or to ground?
22
). Installing wiring
DC