KB Electronics KBAC-29 (1P) - Manual (Page 14)

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 avail-
able for GFCI operation – contact
our Sales Department.
Note: The rated AC line voltage of the
drive must match the actual AC line
input voltage. On Models KBAC-24D,
27D, the setting of Jumper J1 must
match the AC line input voltage.
Models KBAC-24D, 27D: Designed to
accept single-phase (Terminals “L1”, “L2”) AC line input only. Rated for 208/230 Volt AC line input with
Jumper J1 set to the “230V” position (factory setting). Rated for 115 Volt AC line input with Jumper J1
set to the “115V” position. See Figure 7.
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! 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
accordance 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 10, on page 21.
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 two mounting holes for
standard 1/2” liquidtight fittings (not supplied) (one watertight plug is provided, if only one knockout
is used). Models KBAC-27D, 29, 45, 48 contain two mounting 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 Figures 3 and 4, on page 11, for the
tightening sequence. Do not overtighten.
13
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, 45, 48 12 3.3 12 14
TB2 Run/Fault Relay Output Contacts All 16 1.3 3.5 3
TABLE 5 – TERMINAL BLOCK WIRING INFORMATION
FIGURE 7 – MODELS KBAC- 24D, 27D*
AC LINE INPUT, MOTOR, AND GROUND CONNECTIONS
AC LINE MOTOR
Motor
V U W
AC Line Input
115, 208/230 Volt
Single-Phase Ground (Earth)
L1 L2
TB1
*Model KBAC-27D is rated 1 1 ⁄
2
HP maximum with 115 Volt AC line input and 2
HP maximum with 208/230 Volt AC line input.