بەکارهێنانی ترانسفۆراتەرە چاودێڕەکان لە تەرەسەتە کاتژمێردراوەکاندا

Bingehên Elektrîk û Ebena Pad-Mounted Substations

Wêneyek bingehîn elektrîkî ya pad-mounted substation di Figûr 1 de were nîşan kirin.

Eben:

Pad-mounted substation amerîkanî ew êk taybetandîna pad-mounted transformer û wekhevîna li ser demeyên front û back:

• Demaya Front (Cabinet Wiring): Li roc dikare terminal blocks high/low-voltage, switch load high-voltage, fuses plug-in, handle operating tap changer high-voltage, gauge pressure, gauge oil level, thermometer oil, v.b. hene.

• Demaya Back (Oil Tank û Radiators): Transformer core, windings, switch load high-voltage, û fuses plug-in di tank oil yekêtî de ne. Body transformer jêrermîn ji lîstên silîkî daşînên xweyên bi kalînên sîlîkî daşînên kalînên berevan yên kalînên amorphous alloy yên efektiv bike. Windings low-voltage bi rêzikên foil ne, ku bingehîn derserînînîn ya transformer an hilveter, şînên çarçoveya, û overloads biguhez kirin. Connection group Dyn11 e.

• Eben Yekêtî: Design yekêtî ya tank parastina digihîne. Load switches oil-immersed çend tipan hene bi karî girîngkirina systeman radial û ring main distribution.

Parastina û Ebena Pad-Mounted Substations Amerîkanî

Pad-mounted substations amerîkanî bi parastina series connection of a backup fuse protector û plug-in fuse werparastin. Backup fuse protector tuhafî dibêje heke çewtî di pad-mounted substation de pêk be, parastina line high-voltage. Plug-in fuse, bi dual-sensitive fuses, bi hêsanî çewtîyan short-circuit, overloads, û temperature oil zêde di secondary side de pêk be. Ev metoda parastina ekonomîk, îmanparast, û ez dibe bikar bînin.

High-voltage terminals pad-mounted substation bi bushing sockets, single-pass bushing connectors, û elbow (bent)-type cable connectors capable of handling a 200 A load hene. Live parts li ser insulators ve hatine, bi destpêkî structure fully insulated yekun, ku surface terminal ne electrified, parastina personal. Di navbera, plug-in composite-insulated metal-oxide arrester bi qabiliyê ya bashkirina li ser bushing insulator bent-type were saz kirin. Arrester ev fully shielded, fully insulated, û plug-and-play e, parastina û ez dibe bikar bînin. Accessories such as live indicators û fault indicators din hewce bike.

Taybetmendiyên Pad-Mounted Transformers

Pad-mounted transformers, nav transformeryên nû yên bi serdane bi karî kirin, bi parastina îmanparast, struktur raşt, instalasyon çep û çavkani, operasyon ez, size kêm, û maliyê kêm. Wan ji bo karûbaran derveyî û endamî, centers commercial, û buildings high-rise hene. Bi serdane pad-mounted substations domestic, pad-mounted substations amerîkanî taybetmendiyên û taybetmendiyên mêr û taybetmendiyên bin:

• Size Kêm: Volume wan yek sêda her dem capacity domestic pad-mounted substations.

• Fully Sealed û Insulated: Bi struktur fully sealed û insulated, clearance insulation tune, parastina personal û bi navbera ji bo environments power distribution underground.

• Versatile Application: Wan bi karî kirin li ser ring-main û applications terminal, conversion ez, reliability power supply berdest bike.

• Strong Overload Capacity: Wan overload of 2 times the rated value for 2 hours û 1.6 times for 7 hours bi serdane service life tune.

• Low Loss: Losses wan lower than those of domestic S₉-type transformers.

• Flexible Cable Connectors: Cable connectors 200 A load current hene. Emergency situations, wan bi karî bike switches load û characteristics disconnect switches, operation ez û flexible.

• Dual-Fuse Protection: Dual-fuse protection costs operating reduce. Fuses in plug-in fuses dual-sensitive (to temperature û current).

• High-Flash-Point Oil: High-flash-point oil (R-TEMP oil flash point 312°C), inside buildings without risk fire hazards.

• Corrosion Resistance: Transformer body anti-corrosion û treated special paint, harsh environments, storms frequent û pollution high.

• Superior Electrical Performance: Δ/Υ connection û three-phase five-limb structure, voltage quality high, neutral point stable, no heating body, noise low, lightning protection performance good.

• Land-Saving: Green belts, space building power distribution rooms, land utilization improve.

Applications of Pad-mounted Transformers
Selection of Pad-mounted Transformers

• Capacity Selection: Determining capacity factors load, investment, losses, û service life. Generally, based on meeting maximum load with margin, economic technical comparison among transformers similar capacities, distribution transformer total cost ownership lowest. Rated capacities American-style pad-mounted substations include 150, 225, 300, 500, 750, 1000, 1500, û 2000 kVA.

• Type Selection: Pad-mounted substations classified terminal type û ring-main type, mainly determined type load switch.

• Installation Location: Two types insulating oil pad-mounted substations. One common mineral oil, such domestic No. 25 transformer oil; other R-TEMP oil (high-flash-point oil flash point 312°C). Pad-mounted substations filled R-TEMP oil (mark clear low-voltage side) inside buildings, those filled common oil cannot.

• Customization Low-Voltage Side: American-style pad-mounted substations generally not come low-voltage branch protection û metering. Branch protection switches, metering instruments, û compensation devices added low-voltage side according user requirements.

Engineering Application Example

Unit Kunming urban area, newly built residential buildings û office buildings, selected pad-mounted transformer American COOPER Company. Transformer model PMT-LO-500, rated capacity 500 kVA, rated voltage 10 kV/0.4 kV. Low-voltage side, three current transformers, one voltmeter, three ammeters, û four-way load-outlet air switches added according users û power supply department. COOPER's fully insulated, maintenance-free cable branching boxes withstand any harsh environment, allow load-break plugging unplugging installed both sides pad-mounted substation power each building. Pad-mounted substation û branching boxes placed green belt, harmonizing well environment. After year operation, power supply department û users reported good results.

Precautions for Use

Selecting using pad-mounted substations, attention paid type pad-mounted substation, type load switch, û user requirements low-voltage meters.

• Types Pad-mounted Substations: Ring-main type û terminal type. Ring-main type pad-mounted substations, load switch switched supply high-voltage power other end.

• Types Load Switches: Load switches divided 2-position type, 3-position type, û 4-position type. Each position type several forms. 4-position type includes T-type û Y-type, both used dual-power supply. T-type used ring-main pad-mounted substations, Y-type only used terminal pad-mounted substations.

• Inspection Plug-in Fuses Newly Installed Pad-mounted Substations: Checking plug-in fuses newly installed pad-mounted substations, necessary note whether pressure gauge pad-mounted substation indicates zero. Pressure gauge not indicate zero, exhaust valve toggled exhaust air first plugging unplugging fuses. Otherwise, transformer oil may spray out.

Conclusion

Pad-mounted transformers essential electrical equipment urban power grid renovation, real-estate development, û residential power supply construction. American-style pad-mounted substations become first choice urban power distribution transformers unique features prices comparable domestic counterparts. Convenient use numerous advantages, received high praise society û users, become development direction small-scale urban substations.