The pump control cabinet is composed of a controller, circuit breaker, contactor, relay, transformer, indicator lights, and push-button switches. The controller is the core component of the pump control cabinet, primarily used for automatically controlling the start/stop, operating time, and frequency of the pump. The circuit breaker is used for circuit safety protection, while the contactor and relay control the motor's start/stop. The transformer is used to adjust the circuit voltage, and the indicator lights and push-button switches are for indicating and operating the control cabinet.