1. Coil voltage The coil voltage should be selected according to the rated voltage in design. If not, please refer to the temperature rise curve for selection. Using any coil voltage lower than the rated working voltage will affect the operation of the relay. Relay manufacturers pay attention to the coil operating voltage refers to the voltage applied between the coil terminals, especially when using an amplifier circuit to excite the coil, be sure to ensure the voltage value between the two terminals of the coil. The little guy in the relay manufacturer believes that, on the contrary, the performance of the product will be affected when the high rated working voltage is exceeded. Excessive working voltage will cause the coil temperature to rise too high, especially at high temperatures, which will damage the insulating material. It will also affect the safety of the relay.

1. What is "Internet + electrical intelligent maintenance"? With the continuous expansion of the power supply area of the urban power grid, the power supply load of the line has increased rapidly. The number of connections and sections between the original 10kV power distribution lines in the city is increasing, and the line structure is becoming more and more complex. When the line with a heavy load reaches the peak of electricity consumption, the switches will automatically trip. All power supply departments often require users with large power consumption to be equipped with full-time operation staff. The staff on duty in the electrical room must be very clear about the actual operation of the unit’s distribution network and cooperate with the grid company to be familiar with the external grid. Structure, otherwise it will increase the line outage time after the switch trips.

1. Different in nature: AC panel: It is essentially a low-voltage power distribution cabinet, with AC input and AC output, generally matched with the DC panel to provide power to the DC panel and power distribution room for distribution;