Optical Cable Connector Box is a mass of parameters on data. Generally, it is composed of low-voltage forest. Switching equipment, measuring instruments, protective appliances and auxiliary equipment are required to be assembled in a closed or semi-closed metal cabinet or screen frame to form a low-voltage optical cable connector box. During the daily operation of the optical cable connector box, faults will inevitably occur with the passage of time, so some improvements can be made to the optical cable connector box for some common faults.
- Use protection circuit to prevent the occurrence of external circuit faults powered by optical cable connector box. Select a small-sized intelligent phase-loss protector. For example, a DA88CM-II type motor phase-loss protection module can be selected and installed in the optical cable connector box to prevent the motor from burning out due to low-voltage phase-loss operation.
- If the new column is equipped with a radio frame, when making the housing of the optical cable connector box, the stainless steel plate with a thickness of 2mm can be selected, and the size of the optical cable connector box can be appropriately enlarged in proportion, so as to increase the electrical safety distance between the outgoing lines of each branch, and between the outgoing lines and the housing of the box. This is beneficial to the operation and maintenance of rural electricians and the replacement of melting parts, and can also dissipate heat.
- Improve the connection mode of the low-voltage capacitor bank of the original optical cable connector box, and change its installation position from the pile head on the AC contactor to be connected between the low-voltage incoming line of the optical cable connector box and the meter. Prevent inaccurate metering of metering device due to phase failure of capacitor circuit or capacitor damage during operation.
- Selection of fuses. The rated current of the total overcurrent protection fuse on the low-voltage side of the distribution transformer shall be greater than the rated current on the low-voltage side of the distribution transformer, generally 1.5 times of the rated current. The rated current of the melt shall be determined according to the allowable overload multiple of the transformer and the fuse characteristics.
- Selection of residual current protector. Products that meet GB6829 standard and are certified by China Electrical Product Certification Committee must be selected. A delay protector similar to LJM(J) series power-saving protector with low sensitivity can be selected.
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