Discharge Coil Dry-Type
First. The purpose and scope:
In the realm of high-voltage substations, the High-Performance 10kV Discharge Coil Dry-Type by LUOKE excels. When shunt capacitor groups cease operation, our exceptional discharge device plays a pivotal role in ensuring safety. It efficiently releases internal charges within a specified timeframe, guaranteeing a safe voltage for automatic control switching of capacitor banks. The domestic market's internally equipped discharge resistor shunt capacitors often fall short due to quality issues. However, our dedicated discharge coil is a vital technical safety measure, meeting automatic switching requirements and providing unparalleled performance.
For robust operation safety and reliability of shunt capacitors and related equipment, the recommended single star connection of capacitor banks is widely utilized. Each phase of the capacitor bank is directly paralleled with its discharge coil, while the secondary winding connects in open delta with protection relays for unbalanced voltage protection. This precise configuration ensures internal capacitor protection. When a malfunction occurs in any phase, the unbalance voltage protection detects and swiftly disconnects the capacitor from the grid. Our discharge coil's high precision guarantees optimal protection performance, safeguarding the integrity of the system.
With numerous capacitors in parallel, particularly when dealing with high-capacity setups, our discharge coil provides impeccable protection. The design allows for intermediate tap connections to each phase capacitor, facilitating precise voltage measurement. Two independent secondary windings in differential mode with protection relays form a reliable safeguard. In cases where larger capacitors are connected in series, high-sensitivity differential protection becomes essential. The FDGRC discharge coil ensures high-accuracy differential pressure measurement, safeguarding sensitive operational requirements. The high-voltage coil's center tap A2, utilized with shunt capacitors, is a testament to its superior design.
The 10~35kV dry discharge coil is meticulously designed to meet stringent requirements, rendering it ideal for non-oil installation sites. It stands as the epitome of reliability and efficiency.
Forth. The structural features
1. The product features an advanced epoxy resin vacuum casting structure, ensuring an oil-free assembly that eliminates flammable oil leakage and other drawbacks.
2. Simple yet robust, the product's design promotes easy installation and usage, offering seamless integration into any system.
3. Crafted with exceptional durability, the product boasts high mechanical strength and reliability. The epoxy resin vacuum casting process enhances both internal and external insulation strength, significantly boosting safety and reliability.
5. Minimal maintenance is required; simply surface clean the discharge coil during maintenance periods to ensure ongoing performance.
6. With superior technology, the product exemplifies outstanding performance and fully adheres to JBT8970-1999 and DL/T653-2009 standards.
7. Complying with domestic power transmission site management requirements, the product offers excellent environmental value, perfect for non-oil sites.
Fifth. Environmental Conditions
1. Installation Location: Indoor 2. Ambient Temperature: A robust range from -40°C to +55°C ensures adaptability to diverse climates. 3. Altitude: Reliable performance at elevations not exceeding 2000 meters. 4. Seismic Levels: Ideal for areas with no severe mechanical shocks, ensuring stability. 5. Installation Site: Free from harmful gases, vapors, and non-conductive or explosive dust, ensuring safety and longevity. 6. Relative Humidity: Maintains efficiency with a monthly average relative humidity of up to 90%, and a daily average of less than 95%, perfect for humid conditions.
| 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. Connection Requirements: For connecting to the high-voltage terminal of the capacitor bank, use flexible cables. If using aluminum row connections, ensure the section does not exceed 30 x 4mm, and take measures to secure the terminal head telescopic site. 2. Grounding: Ensure that the discharge coil core and its exposed feet are properly grounded. 3. Stability in Cold Seasons: Discharge coil mounting feet should be grounded. In northern colder regions, regular maintenance is crucial to prevent snow buildup and ensure the prevention of high-side short circuits. 4. Transport Balance: The machine must be transported in a balanced manner, avoiding upside-down positions. 5. Handling Precautions: Handle with care to avoid impacts or scratches from hard objects. 6. Circuit Safety: Avoid secondary reverse polarity, and prevent short circuits in the secondary circuit and multi-point grounding. 7. Side-Mounting Caution: When side-mounted, it is strictly prohibited to cover the secondary wiring. 8. Water Protection: Ensure the product is lower side-mounted to direct secondary wiring leads, preventing water ingress and subsequent shorting of secondary wiring.
Dry type
Oil type
FAQ
1. Question : Why choose us and trust us?
Answer : Because we offer exceptional products, competitive prices, and unparalleled service.
Company spirit: Practical innovation, sincerity to all
Core values: Customers' praise is the only value we exist.
Management concept: Pursuing excellent quality, creating first-rate services
2. Question : Where is your factory located? How can I visit there?
Answer: Our ISO90001 certified factory is strategically located in Yueqing city, Zhejiang Province, P.R.OF China.
You can reach us in about 4 hours from SHANGHAI via high-speed rail or just 45 minutes by air.
We warmly welcome all to visit us.
3. Question : Can you do OEM?
Answer: Absolutely, we possess the capability to execute OEM/ODM customized to your specific requirements.
4. Question : What are the payment terms?
Answer: Typically, we accept T/T, L/C, Paypal, or other negotiable payment options.
5. Question :How about the delivery time?
Answer: If in stock, dispatch occurs within 3 working days.
For production orders, lead times are approximately 10-20 working days, dependent on order volume.
6. Question : How about the shipping method?
Answer: For samples or small orders, we ship via International express like DHL, FEDEX, TNT, UPS, EMS, etc.
For larger shipments, we follow buyer's preference with delivery by sea or air.
How to contact us
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