Using fiber optic sensors for temperature measurement of isolation switches-INNO

Maaaring gamitin ang isolation switch fiber optic sensor para sa mataas na boltahe isolation switch pagsukat ng temperatura, Pagsukat ng temperatura ng paghihiwalay ng load isolation switch, pagsukat ng temperatura ng isolation type ng fuse, mababang boltahe isolation switch pagsukat ng temperatura, Pagsukat ng temperatura ng Schneider isolation switch, pagsukat ng temperatura ng circuit breaker at isolation switch, pagsukat ng temperatura ng outdoor isolation switch, panlabas na AC mataas na boltahe isolation switch pagsukat ng temperatura, ay pagsukat ng temperatura ng isolation switch, paghihiwalay ng fuse sa pagsukat ng temperatura, 10kV isolation switch pagsukat ng temperatura, pagsukat ng temperatura ng power isolation switch, 35kV isolation switch pagsukat ng temperatura.

Ang high voltage switchgear ay isang mahalagang kagamitan sa sistema ng kuryente at gumaganap ng mahalagang papel sa paghahatid at pagbabago ng kuryente. Dahil sa pagiging kumplikado ng kapaligiran sa pagtatrabaho, when abnormal situations occur in high-voltage switchgear, according to relevant departments, the first manifestation is thermal failure. The root cause is that the bolts of the busbar or cable connection head are not tightened properly, and the clamping spring of the isolation switch is loose, which leads to an increase in contact resistance and ultimately causes equipment melting or even short circuits. Although the contact resistance value is not easy to obtain, the equipment will generate heat during operation, and the temperature rise of the equipment has a development process. FJINNO has independently developed a fluorescence Sistema ng pagsukat ng temperatura ng hibla based on the temperature changes at the contacts of isolation switches, mga transformer, mga kable ng kuryente, mga busbar, atbp. It can accurately monitor the temperature status of isolation switches to determine the working status of the equipment and control the instrument.

There are several main reasons for the heating of 110kV isolation switches.

1、 Outdoor isolation switch equipment that operates exposed to air for a long time is susceptible to erosion by rainwater, alikabok, and chemicals, which can easily form an oxide film at the handshake and contact points, increasing the resistance of the contact surface and causing heating.

2、 The GW4 type isolation switch with heating is a product produced in an earlier period. Based on years of operating experience, the author has summarized that the heating at the handshake of the isolation switch is a high-frequency defect, which may be related to the metal material and manufacturing process at the handshake of the isolation switch. Kasabay nito, most of the GW4 type isolation switches installed on the 110kV busbar side of Zidong Substation are manually operated mechanisms, and their heating may be due to improper personnel operation, inadequate or over position closing of the isolation switches, resulting in poor contact.
3、 The three sets of isolation switches that generate heat above are all in the open state for a long time under normal annual operation. The contact finger at the handshake is severely oxidized, and the stubbornness coefficient of the spring changes, resulting in uneven looseness and looseness, which is also the cause of heat generation.

Batay sa pagsusuri sa itaas, it is determined that the heating cause of these three sets of isolation switches is contact resistance heating, and the heating type is current induced heating.