KB Electronics KBVF-48 - Manual (Page 17)

9 WIRING INSTRUCTIONS
WARNING! Read Safety Warning, on pages 8 and 9, before using the drive. Disconnect
main power when making connections to the drive. To avoid electric shock, be sure to
properly ground the drive.
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 Section 10, on page 22.
17
TABLE 3 – TERMINAL BLOCK WIRING INFORMATION*
9.1 AC LINE CONNECTION – Wire the
AC line input to Terminal Block TB1.
Model KBVF-27 is designed for
single-phase (Terminals “L1”, “L2”) or
3-phase (Terminals “L1”, “L2”, “L3”)
AC line input. Models KBVF-29, 45,
48 are designed for 3-phase
(Terminals “L1”, “L2”, “L3”) AC line
input only. See Figures 1 and 2, on
pages 4 and 5.
Application Note: GFCI Operation –
Do not connect this drive to an AC
power source controlled by a
Ground Fault Circuit Interrupter.
Special software is required for
GFCI operation – contact our Sales
Department.
Model KBVF-27 – Rated for 208/230
Volt single-phase or 3-phase AC line
Input.
Model KBVF-29 – Rated for 208/230
Volt 3-phase AC line input.
Models KBVF-45, 48 – Rated for
400/460 Volt 3-phase AC line input.
9.2 GROUND CONNECTION – Connect the ground wire (earth) to the green ground screw. The ground
screw is located on the heat sink. See Figure 14.
Terminal Block Maximum Wire Size (Cu) Recommended Tightening Torque
Designation Description Location AWG mm 2 in-lbs kg-cm
TB1 AC Line Input and Motor Wiring Upper PC Board 12 3.3 12 14
TB1**
Signal Input, Direction Switch,
and Main Speed Potentiometer
SIVFR*** 16 1.3 3.5 4
TB2** Run/Fault Relay Output Contacts SIVFR*** 16 1.3 3.5 4
* Models KBVF-27, 29 contain quick-connect terminals for signal input. Connectors are provided for wiring of Direction Switch and Manual Start Switch.
** Models KBVF-45, 48 only. *** SIVFR – Signal Isolator and Run/Fault Relay is standard on Models KBVF-45, 48 and optional on Models KBVF-27, 29.
Ground (Earth):
see Section 9.2.
(Model KBVF-27 Only):
Single-Phase Connection
(Use L1, L2)
see Section 9.1.
see Section 9.3, on Page 18.
Motor Connection:
(Use L1, L2, L3)
see Section 9.1.
(Models KBVF-27, 29, 45, 48):
3-Phase Connection
L3
Motor
M
OT
OR
AC
LIN
E
L2
L1
W
TB
1
V
U
FIGURE 14 – AC LINE INPUT, MOTOR, AND GROUND CONNECTIONS