Introduction of several measurement methods for cable joints

Measurement method of cable joint:

1.Temperature sensing cable type temperature measurement. Place the temperature sensing cable in parallel with the cable. When the temperature of the cable exceeds a fixed temperature value, the sensing cable is short-circuited and an alarm signal is sent to the control system. The disadvantages of ordinary temperature sensing cables are: destructive alarms, fixed alarm temperature, incomplete fault signals, system installation and maintenance are not convenient enough, and equipment is easy to damage; analog linear temperature sensing cables can only use a certain partial line as the alarm unit , So it cannot accurately locate the alarm signal generated at a certain point.
2.Thermistor type temperature measurement. The thermistor can be used to measure the temperature value of the cable, but they are all analog outputs, which require signal amplification and A/D conversion to be received. Each thermistor requires independent wiring, the wiring is complicated and the thermistor is easy Damaged, large amount of maintenance, the sensor does not have the self-check function, and needs to be checked frequently.
3.Infrared sensor temperature measurement. Infrared sensing uses all objects whose temperature is higher than absolute zero to continuously emit infrared radiation energy to the surrounding space. The size of the infrared radiation energy of the object and its wavelength distribution have a very close relationship with its surface temperature. Therefore, by measuring the infrared energy radiated by the object itself, its surface temperature can be accurately determined. Infrared sensing is a non-contact measurement, so it has good safety. Its disadvantage is that it is greatly affected by object emissivity, environment and aerosol during temperature measurement, and its anti-interference ability is poor.

The 35kV touchable cable connector is suitable for power distribution devices and high-voltage electrical appliances in power plants and substations with a power frequency AC voltage of 35kV and below, such as: cable splitter boxes, combined transformers, and the inlet and outlet lines of GIS systems. It is a fully insulated, fully sealed and fully shielded product. The product adopts the international advanced post-injection insulating layer technology, and the electrical performance has reached the international leading level, making it safer and more reliable to use. The installation conditions are not affected by the harsh environment, anti-frost, anti-fouling, and maintenance-free. The product stress treatment introduces German technology, the product structure is small in size, and fully meets the requirements of installation space. It is the world’s leading prefabricated cable head. Use cable cross section 50-630mm2.

The 12(24)/250 European straight-through cable connector is used for the connection of the ring network cabinet and the high-voltage lead-out cable in accordance with DIN47636 250A standard casing. It can be installed vertically, and the test point can be installed with a short-circuit fault indicator or a live display to achieve rapid failure Positioning or indication of the line’s live status, and cannot be plugged or unplugged.

The voltage level is customized according to the design requirements of 12kV or 24kV. Rated current: 250A. Applicable cable section: 35~150mm2.