Hitachi SJ Series, User Manual

Page: 62 / 786

7-7
Chapter 7
Wire Connection and Optional Devices
7.5.3 What Can Be Done with Main Circuit
Terminal Block
Points to be noted on main circuit terminals
・
Make sure to check that the charge lamp is
off before performing wiring. Once the
power is turned on, regardless of whether
open phase is occurring or the device is
running or not, it is very dangerous
because the capacitor in the inverter is
charged at high voltage for a certain period
even after the power is shut off.
Input terminal for main power supply (R,S,T)
・
For connection between the power supply
and main power terminals (R, S, T), use the
earth-leakage breaker for protecting the
circuit (wiring).
・
If the protective function of the inverter is
activated, it means a failure or an accident
is occurring on your system. Connect the
magnetic contactor that shuts off power
supplied to the inverter.
・
Since the earth-leakage breaker may
malfunction due to effects of high frequency,
please use a model with large
high-frequency sensitive current value.
・
Do not turn on or off the magnetic contactor
installed on the input (primary) and output
(secondary) sides of the inverter to start or
stop operation. Otherwise, you run the risk
of damage to the inverter.
・
To start or stop operation using an external
signal, use the operation command (FW,
RV) of the control circuit terminal block.
・
When performing work such as changing
wiring after shutting off the power, wait for
10 minutes (*1) or 15 minutes (*2), and
check that there is no residual voltage
between P and N using a tester or other
instrument to confirm safety.
*1) For models P1-00044-L - P1-01240-L (P1-004L - P1-220L)
and P1-00041-H - 00620-H (P1-007H - P1-220H)
*2) For models P1-01530-L - P1-02950-L (P1-300L - P1-550L)
and P1-00770-H - P1-03160-H (P1-300H - P1-1320H)
・
This device is compatible with 3-phase
power supplies. It cannot be used with
single-phase power supplies. If
single-phase input is required, please
contact our sales office.
・
Do not operate the inverter when an input
phase is lost. Otherwise, you run the risk
of damage to the inverter.
・
The internal capacitor is charged even
when an input phase is lost. You run the
risk of electric shock and injury.
・
When shipped from the factory, the
protective function for input phase loss is
disabled, and the following conditions are
applied.
R-phase or T-phase is lacking:
The inverter does not run.
S-phase is lacking:
It triggers single phase operation,
which may cause insufficient
voltage, frequent occurrence of
overcurrent errors, and the inverter
may be burned.
Do
Do
Do
Electric
shock
Do
Prohibited
Electric
shock
Injury
Failure
Prohibited
Failure
Do
Prohibited