Pag-setup ug Pag-sync sa HV Vacuum Circuit Breaker

Ang mga high-voltage vacuum circuit breakers gitukod sa tanang bahin sa industriya sa kuryente sa China—sa pagbag-o sa grid sa kuryente sa lungsod ug bukid, sa mga planta sa kemikal, metalurhiya, elektrisasyon sa tren, pagminda, ug uban pa—tungod sa ilang excellent na karakteristikas sa pagpahimutang sa arc, suitability sa regular nga operasyon, ug long maintenance-free intervals. Nakuha nimo ang widespread acclaim gikan sa mga users.

Ang primary advantage sa vacuum circuit breakers nahimong ang vacuum interrupter; bisa, ang long maintenance-free interval dili naghulagway og “no maintenance” o “maintenance-free.” Gikan sa holistic perspective, ang vacuum interrupter mao ra usa ka komponente sa circuit breaker. Ang uban pang critical parts—same as ang operating mechanism, transmission linkage, ug insulating components—equally essential aron masiguro ang overall technical performance sa breaker. Proper routine maintenance sa tanang komponente kini mahimong mag-achieve og optimal operational results.

I. Installation Requirements for Vacuum Circuit Breakers

Kung dili explicit nga guaranteed gikan sa manufacturer, importante nga ipahimulos ang routine on-site inspections bago ang installation, avoid ang unwarranted overconfidence.

• Ipahimulos ang visual ug internal inspections bago ang installation aron sigurado nga ang vacuum interrupter, tanang parts, ug subassemblies complete, qualified, undamaged, ug free of foreign objects.

• Strictly follow installation procedures; ang fasteners gamiton sa component assembly must conform sa design specifications.

• Verify inter-pole distances ug positional spacing sa upper ug lower terminals aron sigurado nga compliant sa relevant technical standards.

• Tanang tools gamiton must clean ug suitable sa assembly tasks. Kung mag-tighten sa screws near sa vacuum interrupter, fixed wrenches—not adjustable (crescent) wrenches—must gamiton.

• Tanang rotating ug sliding parts dapat move freely; lubricating grease must apply sa friction surfaces.

• Bago successful overall installation ug commissioning, thoroughly clean ang unit. Mark all adjustable connection points pinaagi sa red paint, ug apply anti-corrosion grease sa terminal connection areas.

II. Adjustment of Mechanical Characteristics During Operation

Typically, ang manufacturers fully adjust key mechanical parameters—such as contact gap, stroke, contact travel (overtravel), three-phase synchronization, opening/closing times, ug speeds—during factory commissioning, ug provide corresponding test records. Sa field applications, only minor adjustments sa three-phase synchronization, opening/closing speeds, ug closing bounce usually required bago ready ang breaker para sa service.

(1) Adjustment of Three-Phase Synchronization:

Identify ang phase may largest discrepancy sa opening/closing timing. Kon ang pole closes too early or too late, slightly increase or decrease its contact gap pinaagi sa rotate sa adjustable coupling sa its insulating pull rod half a turn inward or outward. This typically achieves synchronization within 1 mm, yielding optimal timing parameters.

(2) Adjustment of Opening and Closing Speeds:

Ang opening ug closing speeds affected by multiple factors. On-site, adjustments generally limited sa opening spring tension ug contact travel (i.e., compression sa contact pressure spring). The tightness sa opening spring directly affects both closing ug opening speeds, while contact travel primarily influences opening speed.

• Kon closing speed is too high ug opening speed too low, slightly increase the contact travel or tighten the opening spring.

• Conversely, loosen the spring if needed.

• Kon closing speed is acceptable but opening speed is low, increase the total stroke by 0.1–0.2 mm, which similarly increases contact travel on all poles ug raises opening speed.

• Kon opening speed is excessive, reduce contact travel by 0.1–0.2 mm to lower it.

After adjusting synchronization ug speeds, always re-measure ug verify the contact gap ug contact travel for each pole to ensure compliance with product specifications.

(3) Elimination of Closing Bounce:

Closing bounce is a common issue in vacuum circuit breakers. Primary causes include:

• Excessive mechanical impact during closing, causing axial rebound of the moving contact;

• Poor guidance of the moving contact rod, leading to excessive wobble;

• Excessive clearances in the transmission linkage;

• Poor perpendicularity between the contact surface ug central axis, causing lateral sliding upon contact.

Para sa assembled product, overall structural rigidity is fixed ug cannot be altered on-site. In coaxial designs, the contact spring connects directly to the conductive rod without intermediate linkages, eliminating clearance. However, in offset-axis (heteroaxial) designs, a triangular bell crank connects the contact spring to the moving rod via three pins, introducing three potential clearances—making this the focal point for bounce mitigation.

Additionally, minimize transmission clearance between the initial end of the contact spring ug the conductive rod to ensure a compact, backlash-free drive train. If bounce stems from poor perpendicularity of the interrupter’s contact face, rotate the vacuum interrupter by 90°, 180°, or 270° during installation to find the optimal alignment. If no satisfactory position is found, replace the vacuum interrupter.

Durante ang pagkorek sa pagbouncing, siguraduhon nga tanang mga tueras mahimong butangan gamay sa dako aron mapugos ang pag-interfere gikan sa mekanikal nga pag-bisilyo.