INSTALLATION AND OPERATING INSTRUCTIONS REGENERATIVE DRIVE MODEL KBRG-212D KB Part No. 8819 VARIABLE SPEED SCR CONTROL DESIGNED FOR SHUNT WOUND and PM DC MOTORS FULL WAVE • 4 QUADRANT ! See Safety Warning on Page 2 The information contained in this manual is intended to be accurate. However, the manufacturer retains the right to make changes in design which may not be included herein. See Page 2 ™ A COMPLETE LINE OF MOTOR DRIVES © 1997 KB Electronics, Inc.
TABLE OF CONTENTS Section Page i. KBRG-212D Simplified Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 ii. Safety Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 I. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 II. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
i. KBRG-212D SIMPLIFIED OPERATING INSTRUCTIONS IMPORTANT – You must read these simplified operating instructions before you proceed. These instructions are to be used as a reference only and are not intended to replace the detailed instructions provided herein. You must read the Safety Warning on page 2 before proceeding. 1. CONNECTIONS. A. AC Line – Wire AC line voltage to terminals L1 and L2. Be sure jumpers J1 and J2 are both set to the correct input line voltage 115 or 230 VAC.
ii. SAFETY WARNING! — PLEASE READ CAREFULLY This product should be installed and serviced by a qualified technician, electrician or electrical maintenance person familiar with its operation and the hazards involved.
To understand the concept of a regenerative drive, the operation of an elevator can be used. If one were to enter the elevator on the first floor and press 10, the motor and control would have to lift the elevator against gravity. In this mode, the drive would operate like a conventional speed control which is called “motoring” (the applied load is opposite to the direction of motor rotation).
B. J3 – Armature Current – Select the J3 position (1.7, 2.5, 3.3, 5, 7.5) closest to the rated motor current. (Note the maximum output current is set to 150% of the J3 position, which may be readjusted using the FWD CL and REV CL trimpots.) TABLE 4 – JUMPER J3 POSITION vs MOTOR HORSEPOWER Jumper J3 Position Motor Current (DC Amps) 90VDC 7.5A 3/4 5.0A 1/2 1 3.3A 1/3 3/4 2.5A 2.5A 1/4 1/2 1.7A 1.7A 1/6 1/3 J3 7.5A Motor Horsepower 180VDC 1 5.0A 3.3A C.
D. J5 – Analog Input Voltage – Jumper J5 is set to the “15V” position for potentiometer operation. If the control is to be operated from an isolated 0 – ±10VDC signal, set J5 to the “10V” position. (See sec. V, F, p. 10.) (See fig. 3.) FIG. 3 – JUMPER J5 SETTING Potentiometer Operation Signal Following E. J6 – Control Mode – Speed (SPD) or Torque (TRQ). (Note: Factory setting of J6 is Speed mode.) In the speed control mode (J6 set to SPD), the KBRG-212D will provide variable speed control.
FIG. 5 – TORQUE CONTROL MODE IV. MOUNTING. Mount the KBRG-212D on a flat surface free of moisture, metal chips, or corrosive atmosphere. See Mechanical Specifications fig. 9, p. 9. 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-212D in an enclosure, it must be large enough to allow the proper heat dissipation.
A. AC Line – Connect AC Line to terminals L1 and L2. (Be sure jumpers J1 and J2 are set to match the AC Line voltage used.) (See table 5, p. 4.) FIG. 6 – AC LINE AND ARMATURE CONNECTION ARM FUSE B. Motor Armature – Connect motor armature to terminal M1 and M2. (Be sure jumper J4 is set to match motor voltage.) (See table 5, p. 4.) F1 C. Ground – Be sure to ground (earth) control via green screw located on chassis. Do not ground any other terminals. D. Field – For Shunt Wound motors only.
8 FIG.
9 FIG.
E. Main Speed Potentiometer – The main speed potentiometer can be connected in several ways using terminals “COM,” “+15,” “SIG” and “-15.” A 5K ohm potentiometer is supplied with control. (A 10K potentiometer can also be used.) (Warning! Terminals “COM,” “+15,” “SIG” and “-15" are not isolated from AC line.) Note: Jumper J5 must be in the “15V” position. i. Unidirectional operation only – Connect potentiometer to terminals “COM,” “+15,” “SIG" for forward direction.
G. Enable Start/Stop Circuits – The KBRG-212D contains a 2-wire stop circuit (Enable) which is used to electronically bring the motor to a “stop.” An isolated single contact closure is required. If an isolated contact is not available, it may be necessary to use an isolation relay. WARNING! Do not use Start/Stop or Enable functions as a safety disconnect. Use only an AC line disconnect for that purpose. i.
TABLE 8 – ARMATURE FUSE CHART Motor Horsepower 90VDC 180VDC Approx. DC Motor Current Amps 1/8 1/4 1.3 1/6 1/3 1.7 1/4 1/2 2.5 4 1/3 3/4 3.3 5 1/2 1 5.0 8 7.5 12 3/4 1 Fuse Rating (AC Amps) 2 2 VII. TRIMPOT ADJUSTMENTS. The KBRG-212D contains trimpots which have been factory adjusted for most applications. See specifications for factory settings. (Note: Fig. 8 p. 8 presents the various trimpots with their location. They are shown in the approximate adjustment position.
B. Deadband Trimpot (DB) – The DB trimpot sets the amount of main speed potentiometer rotation required to initiate control voltage output. It is factory adjusted to approximately 25% of rotation. The DB trimpot also determines the amount of delay that will occur before regeneration starts. Regeneration occurs when the applied load torque is in the same direction as the motor rotation. To readjust the DB to factory setting: i. Set Main Speed pot to zero speed position. ii.
F. Response Trimpot (RESP) – This trimpot determines the dynamic response of the control. The factory setting is approximately 50% of full rotation. The setting may be increased if a faster response is required. Note: If response is made too fast, unstable operation may result. VIII. FUNCTION INDICATOR LAMPS. A. Power On (PWR ON) – Indicates that the drive is energized with the AC line. B.
IX – LIMITED WARRANTY For a period of 18 months from date of original purchase, KB will repair or replace without charge devices which our examination proves to be defective in material or workmanship. This warranty is valid if the unit has not been tampered with by unauthorized persons, misused, abused, or improperly installed and has been used in accordance with the instructions and/or ratings supplied.
