Pagtungha sa Paggamit sa 10kV Load Switchgear sa Mga Distribusyon Network

Isipagtrabaho sa unahan sa operasyon ug maintenance sa power distribution, kada adlaw nako gisulay ang load switches—silang mao ang “gatekeepers” sa medium - voltage distribution systems, siguraduhon nga stable ang power supply para sa mga user. Tungod sa rapidong ekonomikong pagkamalig-on, ang demand sa safety ug reliability sa power system wala mahimong mapauswag. Ang medium - voltage distribution systems dako kaayo ang papel sa grid stability, ug ang load switches (bilang key line - mounted equipment) nagpupuyo sa isang importante nga role. Ang ilang pangunahon nga mga function kinahanglan: ① Closing load currents sa distribution main ug branch lines samtang gi-maintenance o load transfer; ② Pag-create og visible break points alang sa safety sa personnel samtang gi-repair ang line; ③ Pag-assist sa grounding sa panahon sa maintenance. Labi pa sa functionality, kinahanglan usab sila nga easy to install, reliable sa operation, low - maintenance, ug cost - effective.

Ang load switches mao ang switchgear nga may simple arc - extinguishing devices. Sa struktura, kinahanglan sila nga magpatuman: visible gaps sa open position (eliminating the need for series - connected disconnectors); high endurance sa switching operations walay frequent contact/arc - chamber maintenance; ug ang ability sa closing short - circuit currents (meeting dynamic/thermal stability requirements, bisan dili sila mag-open sa short - circuit currents).

1. Classification and Comparison of Load Switches
1.1 Classification by Arc - Extinguishing Medium

Ang load switches gikategorya sa lima ka tipo batas sa arc - extinguishing media: mineral oil, compressed air, organic - material gas - producing, SF₆ gas, ug vacuum load switches. Functionally, kasinatian sila sa general - purpose, special - purpose, ug specific - application types (e.g., motor - operated, disconnector - backed capacitor - bank, frequent - operation, ug back - to - back switches).

1.2 Technological Evolution and Advantages of Vacuum Load Switches

Tungod sa teknolohikal nga pagkamalig-on, ang traditional load switches (mineral oil, compressed air, gas - producing) gisubli sa SF₆ ug vacuum load switches—espesyalmente ang latter, nga kasagaran na gamiton. Ang mga test mosulti nga ang vacuum switches mas maayo sa daghan ka mga aspecto:

• Fast Arc Extinguishing: Ang vacuum arcs musugot sa current zero (tungod sa metal vapor diffusion), ug ang insulation recovery mas rapido kay sa air o SF₆. Ideal sa switching no - load transformers, cables, ug overhead lines.

• Safe and Clean: Walay splashing sa arcs, preventing contamination/damage sa cabinet components.

• Long Lifespan: Mas gamay ang arcing distance, mas lawas ang arc voltage, ug mas gamay ang contact wear, resulta mas daghan ka switching cycles ug minimal maintenance.

• Efficient Operation: Low closing energy sa operating mechanism, simple structure, ug easy miniaturization.

• Stable Contact Resistance: Walay oxidation sa vacuum, ensuring long - term low contact resistance.

2. A New Type of Combined Isolation Load Switch
2.1 Limitations of Traditional Configurations

Ang conventional load switches adunay arc - extinguishing devices sa series sa main circuit. Ang ilang dynamic/thermal stability limitado sa arc - chamber design/materials, making them unsuitable for large - capacity systems. Ang pag-ila nila sa disconnectors madugay: cumbersome maintenance, slow recovery, frequent upkeep, ug high initial costs.

2.2 Introduction to the Fla15/97 Combined Isolation Load Switch

Ang Fla15/97 outdoor combined isolation load switch address niini nga mga problema ug kasagaran na gamiton sa European grids.

2.2.1 Main Functions

Nag-integrate siya sa functions sa vacuum load switch, disconnector, ug grounding switch—usa ka optimized, multi - functional device nga balancing technical performance ug economic efficiency.

2.2.2 Product Features

• Comprehensive and Advanced: Ang vacuum arc chamber lang ang handle sa circuit switching (no load/short - circuit current in the closed position). Fast insulation recovery, minimal contact wear, long lifespan, low contact resistance, ug no arc damage sa main contacts. Short operating stroke, compatible sa small actuators.

• Easy Installation and Maintenance: Interlocked operation sa vacuum switch ug disconnector enables one - step opening/closing, preventing misoperations.

• Low Maintenance: Simple structure sa vacuum arc chamber lifespan 5,000 operations ug uban pang components lasting 30,000 operations. Ang built - in actuator gigamit ang patented technology sa Germany’s Drees.

2.2.3 Technical Highlights

• Innovative Switching Design: Series - parallel switching sa vacuum arc chambers (auxiliary arc - extinguishing system) ensures no arc impact sa main contacts.

• Built - in Insulated Actuator: Clear separation sa main ug auxiliary contacts, ug faster insulation recovery after opening.

• Reliable Insulation: Copper tension bands maintain insulation distances.

• Compact Operation: Short stroke, compatible sa small actuators.

• Long Electrical Lifespan: Minimal main contact wear.

3. Conclusion

Tungod sa expansion sa power industry aron mapasabot sa rapidong ekonomikong pagkamalig-on, ang distribution networks nanginahanglan og simple, reliable, safe, ug cost - effective solutions. Ang traditional “circuit breaker + disconnector” o “drop - out fuse” configurations only partially meet these needs. Ang outdoor isolation load switches (like the Fla15/97) offer a better balance of functionality and economy.

Ang data mosulti nga ang load switches gamiton 10 times more than circuit breakers sa distribution line branches sa Europe ug America. Tungod sa integration sa uban pang teknolohiya, kasagaran na gamiton sila sa urban distribution networks (e.g., ring main units, cable branches, ug customer service lines).

Para sa frontline operators sama nako, promoting such advanced equipment isn’t just about technical upgrades—it’s about ensuring grid stability, reducing maintenance burdens, ug delivering reliable power sa users. Tungod sa evolution sa distribution networks, ang smart, efficient load switches mao ang mas makapakyas nga indispensable.