Discharge Coil Dry-Type
First. The Purpose and Scope:
When installed in a substation, the LUOKE 10kV Discharge Coil Dry-Type is an essential component for ensuring safe operations. It expertly manages the release of internal charges from shunt capacitor groups during run cessation, facilitating seamless automatic control and switching of capacitor banks. This release must occur within a stipulated timeframe to guarantee a reduction to safe voltage levels. The current market has been plagued with issues stemming from inferior quality internal discharge resistors. These often fail to meet the rigorous demands of automatic switching, making the installation of this dedicated discharge coil an indispensable measure for enhancing the technical security of parallel capacitor substations.
With a focus on the operational safety and reliability of shunt capacitors and their auxiliary equipment, single star connection configurations are highly recommended and have become a prevalent choice. Each phase of the capacitor bank is directly connected in parallel with a discharge coil, while the secondary winding forms an open delta interconnected with protection relays for unbalanced voltage protection. In the event of component failure within any phase of the capacitor, the system's unbalance voltage detection swiftly activates, disconnecting the faulty capacitor from the grid and ensuring the discharge coil's protective accuracy is upheld.
In large capacitor banks, the seamless integration of capacitors in parallel with individual capacity units is primarily secured by internal fuses that isolate faults. This allows for continuous operation of unaffected capacitors. However, imbalances in capacity can cause electrical faults, potentially affecting phase stability. The discharge coils, equipped with intermediate taps, measure voltage across each phase, employing differential protection to mitigate risks. The FDGRC discharge coil excels in these applications, offering superior accuracy in differential pressure measurements and catering to high-sensitivity requirements. Its high-voltage coil, with a center tap A2, is integral to the differential protection of shunt capacitors, facilitating voltage control and ensuring safety during grid disconnection.
The 10~35kV dry discharge coil is meticulously designed to meet rigorous operational demands. It is ideal for non-oil installation sites, providing an efficient solution for modern substations.
Forth. The Structural Features
1. Engineered with epoxy resin vacuum casting, this product eliminates the risks associated with flammable oil leaks, offering a sustainable and secure solution.
2. Its streamlined design ensures outstanding integrity and ease of installation, simplifying usage.
3. Not only is the product robust and reliable, but it also boasts high mechanical strength. The enhanced internal and external insulation, through the epoxy resin vacuum casting process, significantly elevates its safety and reliability.
5. Minimal maintenance is required. During maintenance outages, a simple surface cleaning suffices to maintain the discharge coil's functionality.
6. The product is crafted using advanced technology, ensuring superior performance and full compliance with JBT8970-1999 and DL/T653-2009 standards.
7. Designed to align with non-oil domestic power transmission management requirements, this product offers excellent environmental value.
Fifth. Environmental Conditions
1. Installation Location: Perfect for indoor setups to ensure optimal safety and performance. 2. Ambient Temperature: Withstands extreme conditions, ranging from a chilly -40°C to a warm +55°C. 3. Altitude: Designed for elevations not exceeding 2000 meters. 4. Seismic Levels: The installation site should be free from severe mechanical shocks for reliable operation. 5. Installation Site: Ensure an environment free from harmful gases, vapors, and non-conductive or explosive dust for uncompromised efficiency. 6. Relative Humidity: Monthly average should not exceed 90%, and daily should remain below 95% to ensure stability and longevity.
| 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 to the high-voltage terminal of the capacitor bank should be done using flexible cables. If using aluminum rows, ensure the section does not exceed 30 x 4mm. Take protective measures to secure the terminal head's telescopic site. 2. Ground both the discharge coil core and feet for safety. 3. Ensure the discharge coil mounting foot is grounded. During northern cold seasons, routine maintenance is crucial, including the use of a snow sweeper to prevent high-side short circuits. 4. The machine must be transported in a balanced position; do not place it upside down. 5. Handle with care to avoid contact with hard objects or scratches. 6. Avoid secondary reverse polarity and prevent secondary circuit short circuits and multi-point grounding. 7. When side-mounted, covering the secondary wiring is strictly prohibited to ensure safety. 8. The product should be side-mounted with the secondary wiring protected against water ingress to prevent short circuits.
Dry Type - A Modern Marvel in Energy Solutions
Oil Type - Traditional yet Reliable Powering Options
FAQ
1. Question: Why choose us and trust us to be your preferred partner?
Answer: We offer unparalleled products, competitive prices, and exceptional service, ensuring your satisfaction at every level.
Company Spirit: Practical Innovation, Commitment to Sincerity
Core Values: Your Satisfaction is Our Sole Purpose.
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Answer: Our ISO90001 certified factory stands proudly in the vibrant city of Yueqing, Zhejiang Province, P.R.OF China.
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We warmly welcome all to grace us with your presence.
3. Question: Can you do OEM?
Answer: Absolutely! Our expertise in OEM/ODM services is tailored to meet your unique requirements.
4. Question: What are the payment terms?
Answer: We accept T/T, L/C, Paypal, and are open to discussing other options to suit your needs.
5. Question:How about the delivery time?
Answer: For items in stock, expect delivery within 3 working days. For production items, expect a lead time of 10 to 20 working
days based on the order quantity.
6. Question: What about the shipping methods?
Answer: Small orders or samples are shipped via renowned international couriers like DHL, FEDEX, TNT, UPS, EMS, and more.
For bulk orders, we ensure safe delivery by sea or air, adhering to the buyer's instructions.
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