Maintenance - CHINT JKF8 Series User Instructions

JKF8 SeriesSmart Low-Voltage Reactive Power Compensation Controller
3.3.3 Preparation and inspection before use
1) Before using the capacitor, user should check if the model on the nameplate is consistent with
that of the product. User should also check if the included accessories are complete.
2) Identify the sampling phase sequence of the controller correctly: Turn the multimeter to AC
voltage position. Press one probe on the busbar of the series sampling transformer in the cabinet,
use the other probe to test if the voltage between the transformer and the US1 or US2 terminal
of JKF8 controller is UN (rated operating voltage). If yes, the sampling phase sequence is correct.
3) Check if all the parameters of the controller are set correctly according to "Parameter setup". If
"F-0" is set to "1", user just need to check if "F-5" and "F-6" are set correctly.
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Maintenance

4.1 Daily maintenance
4.1.1 User should check the operating status of the controller on a regular basis. Normally, the displayed
power factor of the controller should not be larger than 0.92 and should be relatively stable.
When the sampling current is smaller than 200mA or the controller displays undercurrent alarm, it
will be difficult to determine whether the controller is under normal operation, because the power factor
can either be positive or negative and the display status can either be leading or lagging, therefore user
should conduct motor load commissioning.
4.1.2 The power factor value will decrease as user increases the motor load, and the controller will display
lagging. As the capacitors are being added automatically, the power factor will increase gradually and the
total current of the cabinet will decrease. User should record the power factor and total cabinet current in
real time.
4.1.3 Use the universal change-over switch on the controller or the cabinet to remove the capacitor banks
in operation manually before disconnecting the power supply of the cabinet.
4.1.4 Short circuit the secondary side of the sampling current transformer before removing or replacing
the JKF8 controller to prevent open circuit of the current transformer. Remove the short circuit line after
reinstalling the controller.
4.2 Analysis and troubleshooting of faults
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