KB Electronics KBAC-48 - Manual (Page 5)

5
Note: Rated for 2 HP maximum with single-phase AC line input and 3 HP maximum with 3-phase AC line
input. For 3 HP rating with single-phase input, use Model KBAC-29 (1P).
Models KBAC-45, 48: Designed to accept 3-phase (Terminals “L1”, “L2”, “L3”) AC line input only.
Rated for 400/460 Volt AC line input only. See Figure 8 on page 15.
1.2 AC Line Fusing – It is recommended that a fuse(s) or circuit breaker be installed in the AC line.
Fuse each conductor that is not at ground potential. For the recommended fuse size, see Table 4
on page 10. Also see Section 11 on page 22.
1.3 Ground Connection – Connect the ground wire (earth) to the ground screw, as shown in Figure 7
on page 14 and Figure 8 on page 15. See Section 5.2 on page 15.
1.4 Motor Connection – Wire the motor to Terminal Block TB1 Terminals “U”, “V”, “W”, as shown in
Figure 7 on page 14 and Figure 8 on page 15. (Special reactors may be required for cable lengths
over 100 ft. (30 m) – consult our Sales Department.) See Section 5.3 on page 15.
1.5 60 Hz And 50 Hz Motor Operation – The drive is factory set for 60 Hz 3-phase motor operation
(Jumper J5 set to the “60Hz” position). For 50 Hz motor operation, set Jumper J5 to the “50Hz”
position. See Section 6.4 on page 18.
1.6 Start/Stop Switch – The drive is supplied with a prewired Start/Stop Switch to electronically
“start” and “stop” the drive, as described in Section 5.5 on page 16. This switch must be used to
“start” the drive each time the AC line is applied to the drive or to “restart” the drive. Also see
Section 6.8 on page 19.
1.7 Jumper Settings – All jumpers have been factory set for most applications, as shown in Figure 2
on page 9. However, some jumpers may need to be set in order to tailor the drive for a specific
application. See Section 6 on pages 18 – 20.
IMPORTANT: In order to ensure that the motor is properly protected with the I 2 t Overload
Protection feature, it is required that Jumper J2 is set to the corresponding position for the motor
horsepower being used, as shown in Figure 18 on page 18.
1.8 Trimpot Settings – All trimpots have been factory set for most applications, as shown in Figure 2
on page 9. Some applications require adjustment of the trimpots in order to tailor the drive for a
specific requirement. See Section 13 on pages 23 – 26.
1.9 Diagnostic LEDs – After power has been applied, observe the LEDs to verify proper drive
operation, as described in Section 12 on page 23.
2 SAFETY WARNING
Definition of Safety Warning Symbols
Electrical Hazard Warning Symbol – Failure to observe this warning could result in electrical
shock or electrocution.
Operational Hazard Warning Symbol – Failure to observe this warning could result in serious
injury or death.
This product must be installed and serviced by a qualified technician, electrician, or
electrical maintenance person familiar with its operation and the hazards involved.
Proper installation, which includes electrical connections, fusing or other current protection,
and grounding, can reduce the chance of electrical shocks, and/or fires, in this product or
products used with this product, such as electric motors, switches, coils, solenoids, and/or
relays. Do not use this drive in an explosion-proof application. Eye protection must be worn and
insulated adjustment tools must be used when working with drive under power. This product is
constructed of materials (plastics, metals, carbon, silicon, etc.) which may be a potential hazard.
Proper shielding, grounding, and filtering of this product can reduce the emission of radio
frequency interference (RFI) which may adversely affect sensitive electronic equipment. It is the
responsibility of the equipment manufacturer and individual installer to supply this Safety
Warning to the ultimate end user of this product. (SW 8/2012)