Hitachi SJ Series, User Manual

Page: 73 / 786

7-18
Chapter 7
Wire Connection and Optional Devices
7.5.8 Wiring Separately
to the Control Circuit Power Supply
・
We want to use a separate power supply for the
control circuit.
・
We want to retain the alarm signal even when the
protection circuit of the inverter operates and shuts
off the magnetic contactor on the input source of
inverter.
・
When the protection circuit of the inverter operates
and shuts off the magnetic contactor on the input
source of inverter, there will be no power supply
that controls the inverter, and the alarm signal of
the output terminal function [AL] cannot be retained.
To retain the alarm signal, use the control circuit
power supply R0 and T0.
・
By the following procedure, connect the terminals
for control circuit power supply R0 and T0 to the
primary side of the magnetic contactor.
(i) Loosen the screws and remove the wires
connected to R0 and T0.
(ii) Remove the whole J51 connector.
(iii) Connect the control circuit power supply to R0 and
T0.
・
For R0/T0 terminal wire (terminal screw
size: M4), use a wire whose diameter is
1.25mm
2
or larger.
The recommended tightening torque is
1.2Nm (maximum of 1.4Nm).
・
Connect a 3A fuse to the power line for
the control circuit.
・
To create a separate line for the control circuit
power supply, remove the J51 connector and
directly connect the power supply (two wires of the
main circuit voltage). If there is abnormality on the
main circuit area, you can change or read internal
data while the main circuit area is turned off.
・
By inputting 24V from an external source, you can
change or read data only with the input of 24V
power supply.
・
If you turn on the control circuit power supply R0
and T0 in advance with the main circuit power
supply R, S, and T, ground fault detection is
performed upon main circuit power-on.
・
When connecting a DC power supply to the control
circuit power supply R0 and T0, set the output
terminal NO/NC selection [CC-11] - [CC-17] to 00.
The signal output may chatter when DC power is
shut off. Please be careful.
Specification of power receipt on the control circuit
power supply
200V class: 200-240VAC (+10%, -15%)
(50,60Hz
±
5%)(282-339VDC)
400V class: 380-500VAC (+10%, -15%)
(50,60Hz
±
5%)(537-707VDC)
Q
!
▼
A
!
ELB
Earth-leakage
breaker
Magnetic
contactor
MC
3-phase
AC
power
supply
R/L1
S/L2
T/L3
R0
T0
Control circuit
power supply
3A fuse
Do