Discharge Coil Dry-Type
First. The purpose and scope:
When it comes to the pivotal role of our 10kV Discharge Coil Dry-Type by LUOKE, its installation in a substation's shunt capacitor group is indispensable. It provides the essential function of discharging internal charges, ensuring automatic control switching of capacitor banks within a specified time frame, releasing any charge to a safe voltage. Current domestic installations often face issues with internal discharge resistor performance, which fails to meet automatic switching demands. Thus, integrating our specialized discharge coil with parallel capacitor substations is a critical measure for technical security and enhanced performance.
For the utmost operational safety and reliability, a single star connection for capacitor banks is highly recommended and widely implemented. Each phase of the capacitor bank is directly paralleled with its discharge coil, and the secondary winding is connected in an open delta with protection relays. This configuration serves as a comprehensive unbalanced voltage protection circuit. In case of any internal damage or failure within the capacitor, our solution promptly detects and disconnects the capacitor from the grid, ensuring unparalleled protection accuracy and performance.
In systems with a large collection of capacitors, the failure of an original internal fuse or capacity imbalance can lead to electrical faults. Our discharge coils, equipped with intermediate taps, precisely measure line and tap voltages, ensuring sound pressure management. The product features two independent secondary windings in differential mode, forming a robust protection circuit. This high-sensitivity differential protection ensures that capacitors can safely exit the grid when necessary, providing accurate and sensitive fault detection. Our FDGRC discharge coil excels in pressure measurement accuracy, guaranteeing superior protective performance.
Our 10~35kV dry discharge coil is meticulously designed to meet all outlined requirements, offering an ideal solution for non-oil installation sites, providing versatility and reliability in high-voltage applications.
Forth. The structural features
1. The product utilizes an epoxy resin vacuum casting structure, achieving an oil-free design that completely eliminates flammable oil leakage and other associated drawbacks.
2. With a straightforward structure and excellent integrity, the product is remarkably easy to install and operate, ensuring seamless implementation and use.
3. Boasting robustness and reliability, the product exhibits high mechanical strength. The epoxy resin vacuum casting process significantly enhances both internal and external insulation strength, greatly improving safety and reliability.
5. Minimal maintenance is required; simply wiping surface contamination from the discharge coil suffices during any maintenance outage, streamlining upkeep.
6. The product benefits from advanced technology and superior performance, fully compliant with JBT8970-1999 and DL/T653-2009 standards, ensuring exceptional quality.
7. Designed to align with domestic power transmission site management's non-oil requirements, the product offers notable environmental benefits.
Fifth. Environmental Conditions
1. Optimize Your Installation Location: Ensure it is securely positioned indoors. 2. Embrace Versatile Temperatures: Operates efficiently between -40~+55°C. 3. Altitude Advantage: Perfect for settings that do not exceed an elevation of 2000 meters. 4. Seismic Stability: Ideal for sites free from severe mechanical shocks. 5. Safety First: Installation sites must be free from harmful gases, vapors, and non-conductive or explosive dust. 6. Humidity Harmony: Keep monthly average humidity below 90% and daily average less than 95% for optimal performance.
| Sixth.The main technical parameters |
| System nominal voltage |
10kV |
20kV |
35kV |
| Rated primary voltage |
11,11.5,12,12.5,
13,11/ √3,12 √3,
11/2 √3+11/2 √3,
12/2 √3+12/2 √3 |
21,23,22/ √3,
24/ √3,
11/ √3+11/ √3,
12 √3+12/ √3 |
38.5/ √3,40/ √3,
42/√3,43.3/ √3,
45/√3,11+11, 11.5+11.5, 12+12, 12.5+12.5, 13+13 |
| Rated secondary voltage |
100V,100V+100V,100V+100/ √3V,100/3V+100/ √3V |
| Single-phase matching capacitor capacity |
0.5~24Mvar |
| Phase /rated frequency |
Singular/50Hz |
| Rated output/accuracy class |
50VA/0.5 Class,100VA/1 Class |
| Wiring |
Less polar |
| Partia discharae |
≤20pC |
| Discharge performance |
When the capacitor bank power 5s,its terminal
voltage drops between 50V and below the √2U1N. |
| Insulation Level |
Rated frequency withstand
voltage(rms) |
35/42 |
55/65 |
80/95 |
Rated lightning impulse withstand
voltage(rms) |
75 |
125 |
185 |
| Withstand voltage between turns |
3 times the rated frequency,
2.5 times the rated voltage, which lasted 60s |
Seventh.
Installation and Transport Considerations
1. Reliable Connections: Ensure flexible cables are used with the high-voltage terminal of the capacitor bank. For aluminum row connections, sections should not exceed 30 x 4mm. Include protective measures for the terminal head at telescopic sites. 2. Grounding Essentials: The discharge coil core and all exposed feet must be grounded. 3. Secure Mounting: Ground the discharge coil mounting foot, especially in northern regions during cold seasons, for routine maintenance and to prevent snow-induced high-side short circuits. 4. Transport with Care: Ensure the machine is balanced during transport and never upside down. 5. Handle with Caution: Avoid contact with hard objects or potential scratches during handling. 6. Safety Restrictions: Secondary reverse polarity, the short circuit of the secondary circuit, and multi-point grounding are strictly prohibited. 7. Wiring Warning: When side-mounted, covering up secondary wiring is strictly prohibited. 8. Prevent Water Ingress: Ensure secondary wiring leads are positioned on the lower side when mounted to prevent water entry and consequent secondary wiring short circuits.
Dry type - Embrace the efficiency and reliability of our dry-type technology.
Oil type - Explore the robust and durable features of our oil-type solutions.
FAQ - Your questions answered with clarity and precision.
1. Question: Why choose us and place your trust in us?
Answer: We offer an unbeatable combination of quality products, competitive pricing, and exceptional service.
Company spirit: Embrace practical innovation and sincere relationships with all.
Core values: Our existence is validated by the praise and satisfaction of our customers.
Management concept: Our relentless pursuit of excellent quality and first-rate customer service sets us apart.
2. Question: Where is your factory located? How can I visit there?
Answer: Our ISO90001 certified factory is strategically located in Yueqing city, ZhejiangProvince, P.R.OF China. A convenient 4-hour journey from Shanghai by high-speed rail or a quick 45-minute flight.
We warmly welcome all visitors to experience our facilities firsthand.
It is a pleasure for all to visit us.
3. Question: Can you do OEM?
Answer: Absolutely, our capabilities include comprehensive OEM/ODM services to fulfill your specific requirements and specifications.
4. Question: What are the payment terms?
Answer: We generally accept T/T, L/C, Paypal, or other negotiable payment methods.
5. Question:How about the delivery time?
Answer: For stocked products, expect delivery within 3 working days. For custom orders, the lead time varies but is usually between 10-20
working days depending on order quantity.
6. Question: What are the shipping methods available?
Answer: Sample or small orders are shipped via trusted international couriers like DHL, FEDEX, TNT, UPS, EMS. For larger consignments, we offer sea or air shipping tailored to your instructions.
How to contact us
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