Simulated electromagnetic disturbance source for isolating switch

The invention discloses a simulated electromagnetic disturbance source for an isolating switch. The simulated electromagnetic disturbance source comprises a testing transformer, a capacitive divider, an adjustable grounding capacitor, a power supply side analog capacitor, a vacuum circuit breaker switch, a discharging sphere gap and a load side analog capacitor. The original side of the testing transformer is connected with a power supply, and the auxiliary side is serially connected with the capacitive divider. The power supply side analog capacitor is parallelly connected with the capacitive divider. The anode of the power supply side analog capacitor is successively connected with the vacuum circuit breaker switch, the discharging sphere gap, the load side analog capacitor and a grounding capacitor in series. The cathode of the power supply side analog capacitor is grounded. The simulated electromagnetic disturbance source can truly simulate an electromagnetic disturbance process and a ground potential increase process in a switching-on process and a switching-off process of the isolating switch and can output a 1.1MHz high-strength electromagnetic field. Furthermore the simulated electromagnetic disturbance source for the isolating switch has advantages of convenient assembling, simple operation, high testing safety and high precision.