8
Two modes of current limit are provided:
1.
Timed Current Limit
"TCL"
– Turns the drive off after a preset time. (The time period
is adjustable with the TCL trimpot from 1-15 seconds and is factory set for
approximately 5 seconds.) In order for the Timed CL feature to operate, the
Start/Stop circuit must be wired. To restart drive after it has "timed out," the Start
button must be pressed.
Application Note:
The “TCL” feature cannot be used in either torque mode, since
nuisance tripping will occur.
2.
Non-Timed Current Limit "NTCL" – In this mode, the drive will reach preset Current
Limit during overload and stay at that level until drive is turned "off" or fuse blows. If
Non-Timed CL is desired, move jumper J6 from the factory set "TCL" position to the
"NTCL" position.
IV.
MOUNTING.
Mount the KBRG in a vertical position (connection terminals in down or up position) on a flat
surface free of moisture, metal chips, or corrosive atmosphere. (Note: If drive is mounted in
other than a vertical position, decrease maximum allowable ambient temperature by 10 ºC.)
(See Outline Drawing fig. 1, p. 3.) A 5K ohm Remote Speed potentiometer is provided with
each control. Install potentiometer using hardware provided. Be sure to install insulating disk
between potentiometer and inside of front panel.
Enclosure
– When mounting the KBRG in an enclosure, it must be large enough to allow for
proper heat dissipation. A 12"x12"x24" enclosure is suitable for the KBRG-240D at full rating
and a 12"x24"x36" enclosure is suitable for the KBRG-225D at full rating. Smaller enclosures
may be used if full rating is not required.
V.
WIRING.
Warning! Read Safety Warning before attempting to use this control.
Warning! To avoid erratic operation do not bundle AC Line and motor wires with
potentiometer, voltage following, enable, inhibit or other signal wiring. Use shielded
cables on all signal wiring over 12" (30 cm) – Do not ground shield.
Wire control in accordance with National Electric Code requirements and other local codes
that apply. The KBRG contains a single AC line fuse wired in series with terminal L1. Be sure
to fuse each conductor which is not at ground potential (do not fuse neutral or grounded
conductors). (See section VI, p. 12, for fuse information.) Wire control in accordance with
connection diagram (see fig. 8 and 9, p. 11). A separate AC line switch or contactor must be
wired as a disconnect switch to control so that contacts open each ungrounded conductor.
See table 6.
TABLE 6 – TERMINAL BLOCK WIRING INFORMATION
Terminal Block
Designation
Connection
Designation
Supply Wire Gauge*
Maximum Tightening
Torque (lbs inch)
Minimum
Maximum
TB1 (Power Board)
F+, F-
22
14
3.5
TB1 (Logic Board)
Logic Connections
22
14
3.5
TB2
L1, L2, M1, M2
18
10
12
*AWG, Cu wire only.
A. AC Line
– Connect AC line to terminals L1 and L2. (Be sure jumpers J1A and J1B are
set to match the AC line voltage used. See table 4, p. 6.) See fig. 6, p. 10.
B. Motor Armature
– Connect motor armature to terminal M1 and M2. (Be sure jumper J3
is set to match motor voltage. See table 4, p. 6.) See fig. 6, p. 10.
