The PCS-9690 series, which consists of PCS-9691 relays and PCS-9692 relays, is a numerical protection and control for PCC and MCC system from 380V to 600V (phase to phase), including protection, control, monitoring and communication. This series can be used as the protection and control for motors, feeders, bus sections and circuit breakers. The PCS-9691 is used in the power control centre of a low voltage auxiliary power system, while PCS-9692 is applied to the motor control centre. The PCS-9690 series is more reliable and easier to maintain. It is flexible to choose the software and the hardware of the device based on our customers’ requirements.