Hitachi SH1-900H

2-25
Chapter 2
Installation and Wiring
 Installation, wiring, and setting work need to be performed by
specialized technicians.
 When using the input terminal 024[SET] function, also check
the second settings.
No.
Operation
stage
Work
Target
section
Residual risk
Details of harm
Protective measure

12
(a)
Installation
Electrical
connections
(D)
DANGER
Due to long wiring length, the
insulation of the motor
degraded by surge, which
eventually burns the motor.
If the wiring length exceeds 20m,
shorten the motor wiring length. Or
install the optional LCR filter and
output side AC reactor.

12
(b)
Installation
Electrical
connections
(D)
DANGER
By a motor is connected to
the different voltage class
inverter, insulation of the
motor degraded, which
eventually burns the motor.
Match the voltage class of inverter
and that of motor.

12
(c)
Installation
Electrical
connections
(D)
DANGER
Due to unstable output
caused by imbalance of power
supply voltage, under voltage,
extreme voltage drop, aging
of motor, the motor burns,
and eventually the inverter
fails.
Check the receiving voltage of
inverter, power receiving method, and
power supply capacity are
appropriate.

12
(d)
Maintenance
for use
Wiring
Inspection
(D)
DANGER
The short circuit failure
caused by degradation of
motor insulation, cracking of
aged wires, etc., causes phase
loss on inverter output, motor
cable, and motor. Driving the
inverter in such a condition
burns the motor, and
eventually the inverter fails.
Check there is no phase loss by
inspection.

12
(e)
Installation
Use
Setting
(D)
DANGER
By performing inappropriate
parameter settings, high
current flows in the motor,
causing it to burn.
Set appropriate values for parameters
related to motor electronic thermal
function [bC110] to [bC225].

Set appropriate values for the settings
of base frequency, rated motor
voltage, motor constant, load type, DC
braking and control mode.
(representative parameters)
Motor-related parameters:
IM: [Hb102] to [Hb118]
SM (PMM): [Hd102] to [Hd118]
Control mode: [AA121]
Load type selection: [Ub-03]
DC braking: [AF101] to [AF109]
13
Use
Operation
(D)
DANGER
The stopped motor
automatically starts running.
To restart the motor after stopping it
by a function, define it in the system.

14
General
General
-
DANGER
Damage and injury caused by
hidden risks.
Perform risk assessment on the
system, and check that the fail safe
function is incorporated into the
system.

15
General
General
-
DANGER
Damage and injury caused by
failure to obtain additional
information concerning risks.
Obtain the latest version of Basic
Guide so that necessary information
can be checked. Communicate
information to the end users as
necessary.
