ABB Electrical OESA-CF30CC6 Disconnect Switch

Model Type: HRC I-CC Electrical OESA-CF30CC6 Disconnect Switch

The action time of this unit is an inverse time limit characteristic. Dirt phase protection is an independent unit which will operate with a fixed delay of 600s when the phase sequence is wrong.

The unbalance and inverted phase protection units can be independently selected or withdrawn, e.g. the inverted phase unit can be withdrawn from use when the motor is allowed to operate in reverse phase sequence, so that there is no risk of the motor being damaged by a reversal of phase sequence.

In this case there will be no tripping due to motor reversal. The low-current unit is used for out-of-load protection of motors.

The unit is particularly suitable for equipment cooled by a constant flow of liquid, e.g. submersible pumps, where the cooling capacity of the motor is reduced when the flow is interrupted.

In this case the motor circuit will be tripped by the low current unit detecting the well. The start time totaliser is another measure to control the number of starts in a given period of time.

It can be set according to the permissible number of starts provided by the motor manufacturer.

The fault parameters recorded in the registers are very convenient and useful for fault analysis.

In addition, the continuous tracking of the motor start-up process and other parameters are extremely useful for monitoring the motor's operating conditions.

The serial communication interface allows all measurements and register parameters to be transferred to the control room or elsewhere in the most convenient way.