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Call 1(800)985-6929 for Sales
Hitachi America Ltd. RCU SERIES
4. Wiring
4.1 Cautions in wiring
12
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Connect the ground cable surely.
If multiple units are to be installed, Do not make the loop with the
ground cables like figure (b) below.
RCU
RCU
#1
1
( O )
(a) GOOD
2
Only a competent electrician should carry out the wiring.
3
Make sure that the input main voltage is switched off.
Fasten the terminal screws to the relevant torque value and make
4
sure that there are not loose terminals.
The signal cables must be isolated from the power cables. For an
unavoidable case, install perpendicular to each other as shown below.
5
Link the RCU output-side terminals (R, S, T) between main input
power and input AC reactor or filter of the inverter. Otherwise,
malfunction of the RCU or inverter could result.
Main
Power
6
( O )
(a) GOOD
hitachiacdrive.com
RCU
#2
#3
INV
Power
RCU
sales@hitachiacdrive.com
RCU
RCU
RCU
#3
#1
#2
( X )
(b) NOT GOOD
Main
( X )
(b) NOT GOOD
sales@hitachiacdrive.com
INV
RCU
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