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3. Others
(1) Reactor installation
If it is necessary to improve the power factor, or if it is necessary to install the hoist just
below a high-voltage power supply unit (1,000 kVA or more, cable length = 10 m or less),
be sure to install a reactor. Without a reactor, the inverter may be damaged.
To install a reactor, please contact us.
(2) Measures for noises
There are several types of noises. The noise sent from
the external unit may cause abnormal operation of the
inverter. The noise generated by the inverter may be
sent back to the power supply line. The radiated noise
may cause abnormal operation of the peripheral units.
● Suppression of noise sent from external units
Install a surge killer on each peripheral unit that may
generate large noise.
● Suppression of noise generated by inverter
We recommend use of noise filter SF1259 or SF1260.
(Refer to the catalog of the Mitsubishi optional
general inverter of separate type.)
Characteristics of Noise Filter
Applicable
Model
hoist
SF1259
U2-1/2 - 2
200 V
SF1260
U2-2.8 - 5
<Measures against leakage current>
This hoist uses an inverter to drive the
motor. Since high harmonics is included
in the inverter output voltage, leakage
current to the ground is created due to the
capacitance to the ground of the line from
the inverter to the motor and the floating
capacitance between the motor winding
and the iron core.
The leakage current not only flows through its own line of the inverter but penetrates other lines
through the ground wiring. To avoid malfunction due to the leakage current, use an earth
leakage circuit breaker with rated sensitivity current of 100 mA or greater. In this case, the
earth leakage circuit breaker functions to prevent disasters such as a fire due to leakage current.
Outside dimensions (Unit: mm)
W
H
D
W1
H1
142
410
65
105
386
222
468
80
190
449
Power supply
－8－
Dimensional outline drawing
Approximate weight
(kg)
C
6
2.4
7
5
Earth leakage
circuit breaker
Leakage current
to the earth
2 mm
dia hole
Leakage current
Loss
(Ref. value)
(W)
(mA)
27
33
118
440
Hoist
Inverter
Motor
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