Справочник Пользователя для Hitachi J300U Series
1-7
6.
Others
WARNING
*
Never modify the unit.
Otherwise, there is a danger of electric shock and/or injury.
Otherwise, there is a danger of electric shock and/or injury.
CAUTION
*
Withstand voltage tests and insulation resistance tests (megger tests) are executed
before the units are shipped, so that there is no need to conduct these tests before
operation.
before the units are shipped, so that there is no need to conduct these tests before
operation.
When conducting megger tests as a part of daily inspection, be sure that these tests are
only executed between the main circuit and the ground. Do not execute megger tests
on the control circuit.
only executed between the main circuit and the ground. Do not execute megger tests
on the control circuit.
Megohm-meter
Megohm-meter
R
S
T
RB
P
N
U
V
FW
• • •
PLC
P24
FM
(L1) (L2) (L3) (RB)
(+)
(–)
(T1) (T2)
W
(T3)
*
Do not attach or remove wiring or connectors (including Digital operator and
Remote operator) when power is applied. Also, do not check signals during
operation. Otherwise, a trip may occur or a failure may be caused. To stop the
operation, be sure to use an operation instruction (FW,REV.) Do not turn
power off within three minutes after it is turned on, or vice versa.
Remote operator) when power is applied. Also, do not check signals during
operation. Otherwise, a trip may occur or a failure may be caused. To stop the
operation, be sure to use an operation instruction (FW,REV.) Do not turn
power off within three minutes after it is turned on, or vice versa.
*
Do not stop operation by switching off the electromagnetic(Mgo) contactors on
the primary or secondary sides of the inverter.To stop the operation, be sure to
use an operation instruction (FW,REV.) Do not turn power off within three
minutes after it is turned on, or vice versa.
the primary or secondary sides of the inverter.To stop the operation, be sure to
use an operation instruction (FW,REV.) Do not turn power off within three
minutes after it is turned on, or vice versa.
(Bad example)
➤
➤
➤
➤
➤
Earth
leakage
breaker
leakage
breaker
Power
supply
supply
Motor
Turn ON and OFF
(Good example)
(Good example)
Mgo
R , S , T
INV
U , V , W
FW
PV24
(L1) (L2)
ON,OFF
ON,OFF
(L3)
(T1) (T2) (T3)
When there has been an instantaneous power failure, and if an operation instruction
has been given, then the unit may restart operation after the power failure has ended. If
there is a possibility that such an occurrence may harm humans, then install an
electromagnetic contactor (Mgo) on the power supply side, so that the circuit does not
allow automatic restarting after the power supply recovers. If the optional remote
operator is used and the retry function has been selected, this will also cause automatic
restarting when an operation instruction has been input, so please be careful.
has been given, then the unit may restart operation after the power failure has ended. If
there is a possibility that such an occurrence may harm humans, then install an
electromagnetic contactor (Mgo) on the power supply side, so that the circuit does not
allow automatic restarting after the power supply recovers. If the optional remote
operator is used and the retry function has been selected, this will also cause automatic
restarting when an operation instruction has been input, so please be careful.