Gwaji na Furfura: Sababu da Tafin Aiki

Karamin Nema da Tafinta Fasahohi na Karamin Jirgin Kofin Dukkun

Zaɓuɓɓuka na karamin jirgin kofin dukkun sun fi yawa cewa ba suka da noma mutanen shinkafa. Suna da zaman lafiya mai tsawo da zaman makarfi mai tsawo, inganci mai tsawo, kyakkyawan da suke mafi karshen fasahohi, kwayoyin da suke mafi karshen, kudaden da suke mafi karshen, kudaden da suke mafi karshen, yadda ake amfani da su a lokacin da ya yi waɗannan, da suka haifar da saka, da suka haifar da gajimta, da kuma sauran abubuwa masu yawa da suka samun hankali a kan tattalin arziki, masu gajimta, da kuma masu ilimi. Karamin jirgin kofin dukkun na takammiyya da aka yi a China a baya suka da muhimmanci, suka da cutar da suka faruwa, suka da cutar da suka faruwa, da kuma suka da cutar da suka faruwa.

Amma, a shekarar 1992, a kan Misa da Karamin Jirgin Kofin Dukkun a Tianjin, teknologi na karamin jirgin kofin dukkun na China ta zama da muhimmanci a kan duniya, wanda ya rage matsayin wurin da ke rage a kan amfani da ita da kuma tattalin arziki. A lokacin da an yi amfani da karamin jirgin kofin dukkun na takammiyya, yawancin lokaci ana iya faru wasu abubuwan da suka haifar da saka. Wannan rubutu ya nuna wasu abubuwan da suka haifar da saka da kuma amsa da za su iya yi don tafinta.

Wasu Abubuwan Da Suka Haifar Da Saka a Tsarin Amfani

1. Karamin Jirgin Kofin Dukkun Ba Zai Iya Fada Ko Yanka (Ba Zai Iya Yi Waɗannan):Idan an yi amfani da kamar fada (ko yanka), karamin jirgin kofin dukkun yana yi waɗannan, kuma ya fi shiga, amma ba zai iya fada (ko yanka).

2. Yankan Da Ba A Baka (Yankan Da Ba A Baka):Karamin jirgin kofin dukkun yana yanka bayan da ba a baka ko kuma a yi waɗannan a lokacin da ake amfani da ita.

3. Masu Mai Gajimta Yana Yi Waɗannan Bayan Da An Samun Kwayoyin:Bayan an samun kwayoyin, masu mai gajimta suna yi waɗannan. Idan an samun kwayoyin da karshe, masu mai gajimta suna yi waɗannan bayan da an samun kwayoyin.

4. Yadda Ya Ƙara Kirkiyar DC:A lokacin da an yi waɗannan da kudace, kirkiyar contact na karamin jirgin kofin dukkun yana ƙara.

5. Yadda Ya Ƙara Lokacin Fada:Lokacin fada, lokacin da contact yana ƙwara yana ƙara.

6. Yadda Ya Faruwa Daga Faɗin CT zuwa Makarantar:A lokacin da an yi waɗannan, ana iya faruwa daga faɗin current transformer (CT) zuwa makarantar.

7. Karamin Jirgin Kofin Dukkun Ba Zai Iya Yanka:Idan an yi amfani da kamar yanka, karamin jirgin kofin dukkun ba zai iya yanka ko kuma zai iya yanka kawai (fase kawai ko fase biyu).

Tambayar Da Za Su Iya Haifar Da Saka

1. Ba Zai Iya Fada Ko Yanka

Idan mekanismi ba zai iya yi waɗannan, kaɗan ya kamata a tabbatar da cewa abin da ya haifar da saka ita ce a kan circuit na kontrol (misalai, protection relay) ko kuma abubuwan masu maye. Bayan an tabbatar da cewa circuit na kontrol ita ce, an samun cewa akwai yanayin da ya haifar da saka a kan universal joint da ke sama da lever arm na mekanismi. Idan mekanismi yana yi waɗannan, amma ba zai iya yi waɗannan, zai iya haifar da saka.

2. Yankan Da Ba A Baka

A lokacin da an yi amfani da karamin jirgin kofin dukkun, ba zai iya yanka idan ba a baka ko kuma a yi waɗannan. Bayan an doke abin da ya haifar da saka, an samun cewa akwai short circuit a kan auxiliary switch contacts na box na mekanismi. Trip coil ta zama da energy through this short, wanda ya haifar da saka. Sabbin da ya haifar da saka shine rainwater ta fito a box na mekanismi, ta fito a crank arm, da kuma ta fito a auxiliary switch, wanda ya haifar da saka.

3. Masu Mai Gajimta Yana Yi Waɗannan Bayan Da An Samun Kwayoyin

Bayan an samun kwayoyin, masu mai gajimta suna yi waɗannan. Idan kwayoyin ta samu, signal ta nuna cewa an samun kwayoyin. Circuit na storage ta da auxiliary contact na breaker da kuma limit switch contact. Bayan an samun kwayoyin, auxiliary contact ta zama da close, wanda ya bude masu mai gajimta. Idan kwayoyin ta samu, lever na mekanismi ta zama da open limit switch contact, wanda ya kasa power to the motor. Idan lever ba zai iya open contact, circuit ta zama da energy, da kuma masu mai gajimta suna yi waɗannan.

4. Yadda Ya Ƙara Kirkiyar DC

Contacts na karamin jirgin kofin dukkun suna da butt-type. Idan kirkiyar contact yana ƙara, zai iya haifar da saka a lokacin da an yi waɗannan. Kirkiyar contact yana da zarura a zama da kiman da ya haifar da saka. Contact spring pressure yana da alaka da kirkiyar, kuma ya kamata a ci gaba da proper overtravel conditions. Gradually increasing resistance reflects contact erosion. Contact wear and changes in contact gap are the primary causes of rising DC resistance.

5. Yadda Ya Ƙara Lokacin Fada

Some contact bounce is normal during closing, but excessive bounce can cause contact burning or welding. The technical standard limits closing bounce to ≤2ms. Over time, the main causes of increased bounce are reduced contact spring force and wear-induced clearance in levers and pins.

6. Yadda Ya Faruwa Daga Faɗin CT zuwa Makarantar

Middle chamber houses a current transformer (CT). During operation, uneven electric fields can form on the CT surface. To prevent this, manufacturers coat the surface with semiconductor paint to equalize the field. During assembly, space constraints may cause the semiconductor coating around mounting bolts to be scraped off, leading to field distortion and surface-to-bracket discharge during operation.

7. Karamin Jirgin Kofin Dukkun Ba Zai Iya Yanka

Under normal conditions, the breaker should reliably interrupt current whether tripped manually or by protection relay.

Vacuum circuit breakers differ from other types by using vacuum as both insulation and arc-quenching medium. If the vacuum level drops, ionization occurs inside the chamber, generating charged particles that reduce insulation strength, preventing proper current interruption.

Tafinta da Amsa

1. Ba Zai Iya Fada Ko Yanka：Inspect all connecting parts in the operating mechanism for excessive clearance. Replace worn components with new, high-hardness, qualified parts.

2. Unintended Tripping：Seal all potential rain entry points; install protective silicone sleeves on the output crank linkage; activate the heating and moisture-removal device inside the mechanism box.

3. Storage Motor Continues Running After Spring Charging：Adjust the position of the limit switch so that the lever fully opens its normally closed contact when the spring is fully charged.

4. Increased DC Resistance：Adjust the contact gap and overtravel of the interrupter. Measure contact resistance using the DC voltage drop method (with test current ≥100A) as specified in standards. If adjustment fails to reduce resistance, replace the vacuum interrupter.

5. Increased Closing Bounce Time：Slightly increase the initial pressure of the contact spring or replace it. If lever or pin clearance exceeds 0.3mm, replace these parts. Adjust the drive mechanism by shifting it slightly toward the dead center point in the closed position—where transmission ratio is minimal—to reduce bounce.

6. Discharge from CT Surface to Support Bracket：Evenly reapply a layer of semiconductor paint on the CT surface to restore uniform electric field distribution.

7. Vacuum Interrupter Fails to Open

If vacuum integrity is confirmed below required levels, replace the vacuum interrupter. Follow these steps:

• Ensure the new vacuum interrupter passes vacuum integrity testing before installation.

• Remove the old interrupter and install the new one vertically. Ensure alignment between the moving contact rod and the interrupter. Avoid torsional stress during installation.

• After installation, measure contact gap and overtravel. Adjust as needed:① Adjust overtravel via the insulating pull rod’s threaded connection.② Adjust contact gap by modifying the length of the moving conductive rod.

• Use a circuit breaker analyzer to measure opening/closing speed, three-phase synchronization, and closing bounce. Make further adjustments if results are out of specification.