RS7 Series Instruction Manual - Benshaw

8. On the BIPCRS6AK firing card, turn potentiometers, “RAMP,” fully (clockwise) CW; “STARTING
TORQUE,” fully (counterclockwise) CCW; and “ACCEL KICK,” fully CW. (Reference Figure 1.)
NOTE: Potentiometers are located at the lower left-hand corner on the BIPCRS6AK firing card.
9. On the DC Injection Braking modification card, turn potentiometers, “BRK TORQUE,” fully CCW, and
“BRK TIME,” fully CCW. (Reference Figure 2.)
NOTE: Potentiometers are located at the lower left-hand side on the DC Injection Braking modification
card.
MI MAX 07 1007 LOW
SEC DS
()SEcDt’4ns
HIGH 0, 50/ SEiDS
RAMP STARTING TORQUE ACCEL kICk BRAkE BRAKE
TORQUE TIME
Flgur. 1 FIgure 2
1 0. Apply the AC three-phase power feeding the RS7 Starter.
()SE)S
11. Observe that the “POWER +15” and the “PHASE CORRECT” LEDs on the BIPCRSSAK firing card are on.
(Reference the Troubleshooting Section of this instruction book if steps 1 0 thru 19 do not conform as
outlined.>
12. Press the start pushbutton and confirm that the “RUN” LED on the DC Injection Braking modification
card and the “RELAY ON” LED on the BIPCRS6AK firing card are on. immediately begin to turn the
potentiometer, “STARTING TORQUE,” on the BIPCRS6AK firing card, CW, until the motor just begins to
rotate. Press the stop pushbutton. Repeat this procedure to ensure that the motor turns slowly when
the start pushbutton is pressed.
13, Press the start pushbutton and observe the acceleration of the motor to full speed. All six gate LEDs on
the BIPCRS6AK firing card should be on. To reduce the acceleration time, turn the potentiometer,
“RAMP,” on the BIPCRS6AK firing card, CCW. Repeat this process until the motor accelerates in the
desired amount of time, turning potentiometer, “RAMP,” CCW for a shorter ramp time and CW for a
longer ramp time.
14, If the motor surges near the end of the accel ramp, press the stop pushbutton. Restart the motor and
as soon as the motor begins to surge, turn the “ACCEL KICK” potentiometer, CCW, until the surging
subsides. Repeat this process until the motor surge is minimized.
15. Press the stop pushbutton. On the BIPCRS6AK firing card, the “RELAY ON” LED should turn off. On
the DC Injection Braking modification card, the “RUN” LED should turn off and the “BRK ON” LED should
come on. The “BRK ON” LED should turn off about 1.5 seconds after the stop pushbutton was
depressed.
1$ Calm late the maximum recommended braking current by the following formula:
Maximum Braking Current (DC) = 3 x Motor FLA (AC)
7. On the DC Injection Braking modification card, turn the “BRK TIME” potentiometer fully CW, start the
motor and allow it to come up-to-speed. Depress the stop pushbutton. The “BRK ON LED should turn
on. Gradually :urn the BRK TORQUE polenliometer. UW. until the DC ammeter indicates the des red -
maximum- recommended braking current.