The metering system principle of cost control and electricity theft prevention metering cabinet

The whole metering system of the metering cabinet is controlled by the password control device. Its principles and USES are as follows:

1. Password control part: this part takes the advanced special digital processing chips in the world as the core to form the password editing, storage and solution system;

2. Preset switch (SZ) is set. After the digital setting is completed, the system will enter the control state of the digital.

3. Use: when the input digital group is correct, the 1.5s unlock signal will be sent to open the lock; If the input is error code and the operation times are up to three times, the 60s (20s) electro-acoustic alarm signal will be sent, and the loudness reaches 120dB);

4. The cryptographic control system USES DC+12V as the power supply, large capacity rechargeable non-maintenance battery as the power reserve, and is equipped with automatic charging device. The charging power is taken from the secondary voltage of PT.

The battery of the meter cabinet is operated twice a day for 45 days under the condition that there is no charging power supply after full power, and the battery voltage drops by about 0.5v (the battery voltage is allowed to drop to 90% of the standard value) after 1080h.