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Chapter 4 WiringEB3000
After removing the front cover, verify if the power and control terminals are clearly noted. Read following
precautions to avoid wiring mistakes.
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 before doing any wiring. For your safety, do not start wiring before the
voltage drops to a safe level (less than 25 V
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 your safety, choose wires that comply with local regulation when wiring
Check following items after finishing the wiring:
1.
2.
3.
Main input power terminals
Do NOT connect three-phase model to single-phase power. R/L1, S/L2 and T/L3
have no phase-sequence requirement, they can be connected in any sequence.
You must install a NFB between the three-phase power input terminals and the
main circuit terminals (R/L1, S/L2, T/L3). Add a magnetic contactor (MC) to the
power input wiring to cut off power quickly and reduce malfunctions when the AC
motor drive protection function activates. Both ends of the MC should have an
R-C surge absorber.
Use voltage and current within the specification in Chapter 12. Refer to Chapter
12 Specifications for details.
When using a general ELB (Earth Leakage Breaker), select a current sensor
with sensitivity of 200 mA or above and not less than 0.1-second operation time
to avoid nuisance tripping. When choosing an ELB designed for the AC motor
drive, choose a current sensor with sensitivity of 30 mA or above.
Use shielded wire or conduit for the power wiring and ground the two ends of the
shielded wire or conduit.
Do NOT run and stop AC motor drives by turning the power ON and OFF. Run
Are all connections correct?
Are there any loose wires?
Are there any short-circuits between the terminals or to ground?
). Installing wiring with a residual
DC
4-2
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