How to install and operate KBAC series adjustable frequency drive?

How to install and operate KBAC series adjustable frequency drive?

Product Overview

The KBAC series adjustable frequency drive is suitable for three-phase AC motors and has a NEMA 4X/IP65 protection level. It can achieve waterproof and dustproof performance and is suitable for indoor and outdoor flushing environments. Supports voltages of 208-230V and 400/460V, with a frequency of 50/60Hz, capable of driving motors ranging from sub fractional horsepower to 10 horsepower. It also has variable speed, soft start function, and electronic motor overload protection. It is compatible with AC inputs of 115V, 208/230V, and 400/460V, and is available in 2G and 3G models. Some 3G models have product labels labeled "(3G)", and both KBAC-217 and 416 series are 3G models.

Core functions and features

（1） Standard Features

Shell: Industrial grade die cast aluminum shell with hinged cover, available in two surface treatments: dark gray and FDA approved white.

Convenience of operation: No programming required, adjustable potentiometer and jumper settings can be made, and most application scenarios are pre-set at the factory.

Selection function: including motor horsepower selection jumper (J2), switch frequency and GFCI selection jumper (J12, only 3G model), diagnostic LED light (power and status indication), operation/fault relay output contact, start stop switch, barrier terminal block, etc. The driver output frequency can also be selected through jumper to achieve a maximum motor speed of twice the rated speed, with power-off recovery function and zero speed holding torque, as well as multiple adjustable fine adjustment potentiometers.

Jumper selection: covering AC input voltage (only J1 for KBAC-24D and 27D), motor horsepower (J2), automatic power-off recovery/manual start (J3), frequency multiplier (J4), motor frequency (J5), fixed/adjustable boost (J6), regeneration/injection braking (J7), operation/fault output relay operation (J8), normally open/normally closed stop contact (J9), constant torque/variable torque (J10), switching frequency and GFCI (only J12 for 3G models).

（2） Performance characteristics

Power Start ™： Can provide over 200% starting torque to ensure smooth start-up under high friction loads.

Slip compensation: With static automatic tuning and boost function, it achieves excellent load regulation over a wide speed range.

Speed range: The speed ratio can reach 60:1.

（3） Protection features

Motor Overload Protection (I2t): With RMS current limitation, it can prevent motor burnout, avoid false tripping, and is certified by UL as an electronic overload protector for motors.

Electronic Surge Current Limitation (EICL) ™）： Eliminate harmful AC input surge currents during startup.

Other protections: equipped with short-circuit protection (shutdown in case of motor phase to phase short circuit), regenerative protection (to avoid tripping caused by high bus voltage due to rapid deceleration of high inertia load), overvoltage and undervoltage protection (shutdown in case of input voltage exceeding the range), MOV input transient suppression (to protect driver components from damage caused by input voltage spikes), and microcontroller self-monitoring and automatic restart functions.

Installation points

（1） Installation method

It is recommended to install it vertically on a flat surface to ensure sufficient ventilation, and reserve enough space below for wiring. If installed inside the casing, it is necessary to ensure that the casing size is sufficient for heat dissipation, the ambient temperature does not exceed 40 ° C (104 ° F), and it cannot be used in explosion-proof environments. The installation must be firm.

（2） Communication input circuit breaker

The driver does not have a built-in circuit fuse, and a fuse (such as Littelfuse 312/314, Bus ABC, or equivalent) or circuit breaker must be connected in series with each non grounded wire according to electrical specifications. The neutral wire or grounding wire should not be blown. Please refer to Table 2 (page 7) for specific fuse specifications.

（3） Electrical connection

Wiring specifications: It must comply with the National Electrical Code and applicable local regulations. Wiring should be carried out after power failure to ensure correct grounding. When remotely connecting potentiometers, switches, etc., it is recommended to install signal isolators to avoid high voltage risks.

Communication input connection: The wiring terminals of different models of drivers are different, and they need to be connected according to the model. The rated AC input voltage of the driver needs to match the actual input voltage, and some models need to set corresponding jumper wires.

Motor connection: The motor is connected to the U, V, and W terminals of TB1. The length of the motor cable should not exceed 100 feet (30 meters). If it exceeds this, a special reactor is required (technical support should be contacted), and the J2 jumper should be set to the corresponding motor horsepower level.

Grounding connection: The grounding wire (earth) should be connected to the green grounding screw, and the motor should also be properly grounded.