Knowledge

Read Meters and Calculate Electricity Bills Take the calculation of electricity and electricity bills from January 1 to February 1 as an example. 1. Meter reading Resident user It

Ten years ago, the electric energy meters were still mechanical meters, which could only display the value of active electric energy. The current electric energy meters are both lo

The current transformer ratio is the ratio of the primary side current to the secondary side current, such as 500/5, 250/5, 100/5, 75/5, 50/5, 25/5, etc. For example, 500/5 means t

The transformation ratio should be based on the primary load calculation current IC to select the transformation ratio of the current transformer. There are various specifications

1. Differences in use If the transformation ratio of the current transformer is inconsistent with the transformation ratio of the ammeter, the displayed value of the ammeter cannot

How to calculate the transformation ratio of the current transformer The current method to measure the transformation ratio of the current transformer is a traditional test method.

5. Pay attention to the following points when choosing an air switch a. Select the type and number of poles of the automatic air switch according to the application. b. Select the

3. Mechanical principle of air switch (1) The air switch is a circuit breaker, which is used for making, breaking, and carrying rated working currently in the circuit, and can perf

The air switch (automatic air circuit breaker) is believed to be a low-voltage electrical device that is familiar to many electrical workers. The application of air switches is ver

Transformer Rated Current Calculation 1. Transformer rated current calculation Rated current refers to the current of the electrical equipment when it is running at rated voltage a

1. The rated capacity of the transformer should be the maximum apparent power of the transformer that can ensure the normal operation of the transformer under the specified operati

Transformer Capacity Calculation First, select the rated voltage of the transformer. The voltage of the high-voltage side is equal to the voltage of the connected grid, and the vol