Yaskawa VCD 723 - Manual (Page 28)

2 Installation and Start-up
22 Electrical Connection
9/15/93
Ensure that wire size and disconnect devices conform to the installation
contractor’s drawings and to all applicable codes. Refer to Tables 5 and 6 for
proper wire sizes and interconnecting information.
Wire Sizes and
Connections
CAUTION
●
Use only factory supplied installation instructions to install
dynamic braking resistors. Failure to do so may cause
equipment damage or personnel injury.
●
Use 600 volt vinyl-sheathed wire or equivalent. Wire size
should be determined considering ampacity and codes.
● Never connect AC main power to output terminals T1(U),
T2(V), and T3(W).
●
NEVER allow wire leads to contact the VCD 723
enclosure. Short-circuit may result.
●
NEVER connect power factor correction capacitors or
noise filter to VCD 723 output.
●
Size of control wire must be suitable for Class I circuits.
●
Use only closed loop (ring lug) connectors sized for the
selected wire gauge. The connectors are to be installed
using the correct crimp tool recommended by the connector
manufacturer.
Observe the following precautions when making wiring connections:
●
Separate the leads used for control I/O (i.e., the signals on terminals 1
through 32, terminals 51 through 76, connector CA1, etc.) from those used
for the power signals (i.e., L1(R), L2(S), L3(T), T1(U), T2(V), T3(W)). Do
not run these two groups in the same conduit or wire trough.
●
Provide shielded and twisted leads as indicated on the schematic and
interconnection diagrams. Connect shield sheath AT THE VCD 723 END
ONLY. The far end should be dressed neatly and left unconnected. Twisted
shielded pair wire should be used for long runs.
●
Lead length should NOT EXCEED 164 feet (50 meters).
●
The contact output control leads from terminals 9, 10, 18, 19, and 20 must be
separated from the other control leads.
●
If the drive is being used in a LAN, use a BNC “T” connector to connect the
LAN coaxial cable to the drive.