Toshiba WX9 ASD, Installation & Operation Manual

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WX9 ASD Installation and Operation Manual 5
Conductor Routing and Grounding
Precautions
• Use separate metal conduits for routing the input power, output power, and control circuits.
• A separate ground cable should be run inside the conduit with the input power, output power, and
control circuits.
• DO NOT connect CC to earth ground.
• Use the CC terminal as the return for analog input terminals VI , RX , and RR .
• Use the CC terminal as the return for output terminals FP , PP , and P24 .
• Use the negative terminal of the AM , FM , and II terminals as the return for these analog inputs.
• Always ground the unit to prevent electrical shock and to help reduce electrical noise.
• If the ASD is being used in an ungrounded system (floating system) or in an unsymmetrically
grounded system, the EMI filter must be disconnected or removed. The ASD may be damaged if
the EMI filter is used under either of these conditions.
• It is the responsibility of the ASD installer/maintenance personnel to provide proper grounding and
branch circuit protection in accordance with the
NEC and any applicable local codes.
— T H E M E T A L C O N D U I T I S N O T A N A C C E P T A B L E G R O U N D —
Power Connections Precautions
C O N T A C T W I T H E N E R G I Z E D W I R I N G W I L L C A U S E
S E V E R E I N J U R Y O R L O S S O F L I F E .
• Turn off and lock-out/tag-out all power sources before proceeding to connect the power wiring to
the equipment.
• Ensure that all power sources are turned off and isolated in accordance with established lock-out/
tag-out procedures before connecting the three-phase power source wiring to the ASD input
terminals and connect the ASD output terminals to a motor of the correct voltage and type for the
application (refer to the NEC Article 300, “Wiring Methods,” and Article 310, “Conductors For
General Wiring”). Size the branch circuit conductors in accordance with the NEC Table 310.16.
• Ensure that the three-phase input power is NOT connected to the output of the ASD. This will
damage the ASD and may cause injury to personnel.
• If multiple conductors are used in parallel for the input or output power and it is necessary to use
separate conduits, each parallel set shall have its own conduit and not share its conduit with other
parallel sets (i.e., place U1, V1, W1, and a ground wire in one conduit and U2, V2, W2, and a
ground wire in another; refer to the NEC Article 300.20 and Article 310.4). National and local
electrical codes should be referenced if three or more power conductors are run in the same conduit
(refer to the NEC Article 310 for adjustment factors).
Note: National and local codes should be referenced when running more than three conductors in
the same conduit.
• Ensure the correct phase sequence and the desired direction of motor rotation in the Bypass mode
(if applicable).
WARNING
DANGER