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1. SAFETY
1.1 WARNINGS
1.2 SAFETY INSTRUCTIONS
!
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hitachiacdrive.com
ONLY A COMPETENT ELECTRICIAN SHOULD CARRY OUT THE
ELECTRICAL INSTALLATION.
Internal Components and circuit boards (excepting the isolated I/O
terminals) apply an electric current when
1
main voltage. This voltage is extremely dangerous and may cause
death or severe injury if you come in contact with it.
When the RCU is connected to the main power, current is flowing in
2
the DC-Link (P, N) and output terminals (R, S, T) even if the RCU is
not operating.
3
RCU has a large capacitive leakage current.
The control I/O terminals are isolated from the I/O voltage but the
4
relay outputs and other I/Os may have dangerous voltage even if the
power is disconnected from the RCU
User should install Fuse which can be blown fast between output
5
terminals (R, S, T) and main power source of the RCU
6
Spare parts can be delivered only by Hitachi America, Ltd.
Do NOT make any connections when the RCU is connected to main
1
voltage.
Do NOT make any measurements when the RCU is connected to
2
main voltage.
After disconnecting main power, wait until the cooling fan stops and
the indicator on display goes out. Wait a further 5 minutes before
3
doing any work on the RCU connections. Do NOT open even the
cover within this time.
4
Do NOT make any voltage withstand tests on any parts of the RCU.
Make sure that the cover of the RCU is closed before connecting
5
main voltage.
hitachiacdrive.com
sales@hitachiacdrive.com
Hitachi America, Ltd. RCU SERIES
the RCU is connected to the
sales@hitachiacdrive.com
3
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