Substation is the power system, and then one to the substation, the electricity from the substation is often directly sent to the terminal. So, what should we do if the switch of MNS low-voltage drawer cabinet can not be powered on?
First of all, don't switch on power again directly, check the reason first. First of all, it is necessary to understand such an operation specification. Generally, high voltage power is transmitted to the transformer first, and the transformer is connected to the main switch cabinet of low-voltage incoming line. Then, after the main switch of low-voltage incoming line is closed, the main bus bar of low-voltage cabinet is powered on, and then each drawer can switch on and off the main switch / or contact Operation will send out electricity, pay attention to the power transmission is from high voltage to low voltage, from the main switch to the shunt switch, all load circuits must be in the off state before power transmission. Whether the power is delivered or not can not be determined by a single switch on. First of all, switch on and send power to the shunt to see if power is sent. If power is not sent, disconnect the shunt switch and check the reason.
In addition, we also need to check whether the line has virtual connection, if there is no problem with the line, we need to check whether the inlet and outlet are connected correctly, etc., to make sure there is no problem, and then switch on again.
Note: the operation of closing and power transmission must be standardized. Turning the handle counterclockwise is opening; turning the handle clockwise is closing.
When all problems do not exist, check whether the circuit breaker is in the off state for further maintenance.
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