KB Electronics KBAC-48 - Manual (Page 14)

14
5 WIRING INSTRUCTIONS
WARNING! Read Safety Warning, on page 5, before using the drive. Disconnect main power
before making connections to the drive. To avoid electric shock, be sure to properly ground
the drive. It is highly recommended that the SIAC Signal Isolator (Part No. 9600) be installed when
using signal following.
WARNING! HIGH VOLTAGE – REMOTE CONNECTIONS OF POTENTIOMETER, SWITCHES, ETC.,
WILL HAVE WIRING THAT IS AT LINE POTENTIAL. IT IS REQUIRED THAT THE SIGNAL ISOLATOR
BE INSTALLED FOR REMOTE CONNECTIONS.
Application Note – To avoid erratic operation, do not bundle the AC line and motor wires with each
other or with wires from signal following, start/stop contacts, or any other signal wires. Also, do not
bundle motor wires from multiple drives in the same conduit. Use shielded cables on all signal wiring
over 12” (30 cm). The shield should be earth grounded on the drive side only. Wire the drive in accor-
dance with the National Electrical Code requirements and other local codes that may apply.
Be sure to properly fuse each AC line conductor that is not at ground potential. Do not fuse neutral or
grounded conductors. A separate AC line switch or contactor must be wired as a disconnect so that
each ungrounded conductor is opened. For fuse or circuit breaker selection, see Table 5. Also see
Section 11 on pages 22 - 23.
To maintain the watertight integrity of the drive, be sure to use suitable watertight connectors and
wiring which are appropriate for the application. Model KBAC-24D contains three holes for standard
1/2” liquidtight fittings (not supplied). One watertight plug is provided, if only one knockout is used.
Models KBAC-27D, 29, 29 (1P), 45, 48 contain three holes for standard 1/2” liquidtight fittings
(not supplied) and one mounting hole for standard 3/4” liquidtight fitting (not supplied).
Two watertight plugs are provided, if only one knockout is used.
The drive is designed with a hinged case so that when the front cover is open, all wiring stays intact.
To open the cover, the four screws must be loosened so they are no longer engaged in the case
bottom. After mounting and wiring, close the cover making sure that the wires do not get caught or
crimped as the cover is closed. Tighten the four screws so that the gasket is slightly compressed.
The recommended tightening torque is 12 in-lbs (14 kg-cm). See Figure 3 on page 11 and Figure 4
on page 12 for the tightening sequence. Do not overtighten.
Table 5 – Terminal Block Wiring Information
Terminal
Block Description Model
Maximum Wire Size (Cu) Recommended Tightening Torque
AWG mm 2 in-lbs kg-cm
TB1 AC Line Input and Motor Wiring
KBAC-24D 12 3.3 7 8
KBAC-27D, 29, 29 (1P), 45, 48 12 3.3 12 14
TB2 Run/Fault Relay Output Contacts All 16 1.3 3.5 3
5.1 AC Line Input Connection – Wire the AC
line input to Terminal Block TB1.
GFCI Operation – Do not connect this
drive to an AC power source controlled
by a Ground Fault Circuit Interrupter.
Special software is available for GFCI
operation – contact our Sales Depart-
ment.
Note: The rated AC line voltage of the
drive must match the actual AC line input
voltage. On Models KBAC-24D and 27D, the
setting of Jumper J1 must match the
AC line input voltage.
AC LINE MOTOR
Motor
V U W
AC Line Input
115, 208/230 Volt
Single-Phase Ground (Earth)
L1 L2
TB1
Figure 7 – Models KBAC- 24D, 27D*, 29 (1P)
AC Line Input, Motor, and Ground Connections
*Model KBAC-27D is rated 11⁄2 HP maximum with 115 Volt AC line input and
2 HP maximum with 208/230 Volt AC line input.