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As an established manufacturer with a strong global presence across North America, Southeast Asia, Europe, and other key markets, Jinhua Dika Electrical Equipment Co., Ltd. is dedicated to engineering reliable and efficient power distribution solutions. Our centrally installed 33KV metering unit, integrated within an 11KV/110V gas insulated substation, represents our commitment to delivering advanced, space-saving, and maintenance-friendly equipment for modern electrical grids. This product is designed to streamline power distribution management by consolidating critical metering and protection functions into a single, robust, and safe enclosure, offering significant advantages in terms of operational safety, accuracy, and long-term reliability.
This Gas Insulated Substation (GIS) unit is engineered for centralized control and monitoring in medium-voltage power distribution networks. The core design philosophy revolves around maximizing safety and minimizing footprint without compromising on performance or accessibility for maintenance.
- Compact & Safe SF6 Gas Insulation: Utilizing SF6 gas as the primary insulating medium, the unit's live components are fully enclosed. This design eliminates exposure to environmental contaminants like dust and moisture, drastically reduces the risk of electrical faults, and allows for a much more compact installation compared to traditional air-insulated switchgear (AIS). The sealed system enhances operational safety for personnel.
- Integrated Central Metering Unit: The heart of the system is the centrally installed metering unit, which is pre-configured for accurate measurement of electrical parameters at 33KV, stepped down to 11KV and 110V for metering and protection circuits. This integration simplifies the overall substation layout, reduces cabling complexity, and centralizes data acquisition.
- High Reliability & Low Maintenance: The sealed gas compartment protects internal components from corrosion and degradation. With fewer moving parts exposed to the atmosphere and the stable dielectric properties of SF6 gas, the system requires minimal maintenance over its extended service life, leading to lower total cost of ownership.
- Advanced Monitoring & Communication: The unit can be equipped with intelligent electronic devices (IEDs) and sensors for real-time monitoring of gas pressure, temperature, and electrical parameters. Optional communication protocols like IEC 61850 or Modbus enable seamless integration into SCADA and smart grid systems for remote supervision and control.
- Robust Construction & Customization: Built with high-quality materials, the enclosure typically offers a protection level of IP54 or higher. The configuration is flexible and can be customized upon request to include specific breaker types, relay protection schemes, and metering class accuracy to meet diverse project specifications.
The technical specifications below outline the standard configuration of our centrally installed metering unit within the GIS:
| Parameter | Specification |
|---|---|
| Rated System Voltage | 33KV |
| Metering Voltage | 11KV / 110V (via VT) |
| Rated Frequency | 50Hz or 60Hz |
| Insulation Medium | SF6 Gas |
| Rated Short-Time Withstand Current | 25kA / 3s (or as required) |
| Metering Accuracy Class | Class 0.5 or Class 0.2S (available) |
| Enclosure Protection (Standard) | IP54 |
| Communication | Optional (IEC 61850, Modbus RTU) |
For our clients, this translates into tangible benefits: Reduced land and building requirements for substation sites, enhanced safety for operational staff, improved reliability of the distribution network with fewer outages, and future-proof infrastructure ready for smart grid integration. The centralized metering also facilitates easier billing, load analysis, and fault detection.
Backed by our company's adherence to recognized management standards and a proven export track record with shipments facilitated through major ports like Shanghai, Tianjin, Guangzhou, and Ningbo, you can be confident in the quality and reliability of our products. Our team of 11-50 dedicated professionals focuses on delivering solutions that meet the specific needs of power utilities, industrial plants, and commercial complexes worldwide. We invite you to leverage our expertise in gas insulated technology to enhance your power distribution network's efficiency and safety. Contact us today to discuss your project requirements and request a detailed technical proposal.
Frequently Asked Questions (FAQ)
Q1: What are the primary advantages of a Gas Insulated Substation (GIS) over an Air-Insulated one (AIS)?
A: The main advantages include a significantly smaller footprint (up to 70% space saving), higher reliability due to protection from environmental factors, enhanced safety for personnel, and lower maintenance requirements over its lifecycle.
Q2: Is the SF6 gas handling environmentally safe?
A: The system is hermetically sealed for life, minimizing any gas leakage. We adhere to proper handling and recovery procedures during manufacturing and servicing. SF6 is used for its excellent insulating properties, which contribute to the compact design.
Q3: Can the metering unit be customized for different accuracy classes?
A: Yes. The unit can be configured with metering current transformers (CTs) and voltage transformers (VTs) to achieve different accuracy classes such as Class 0.5 for commercial metering or Class 0.2S for high-precision requirements, based on your specification.
Q4: What kind of communication protocols are supported for remote monitoring?
A: The substation can be equipped with compatible IEDs supporting industry-standard protocols. Common options include IEC 61850 for modern substation automation or Modbus RTU for simpler SCADA integration. The specific protocol is determined during the ordering process.
Q5: How is maintenance performed on a sealed GIS unit?
A: Maintenance is simplified and less frequent. It primarily involves monitoring the SF6 gas density/pressure via gauges or sensors, checking the operation of mechanical interlocks and indicators, and performing electrical tests on the secondary circuits. Major internal components are designed for long service life within the sealed environment.
Q6: What is the typical delivery lead time for such a unit?
A: Lead time depends on the specific configuration, customization level, and order quantity. Standard configurations may have a shorter lead time, while fully customized solutions require detailed engineering. We provide estimated timelines upon receipt of your detailed inquiry.
Q7: Do you provide installation supervision and commissioning support?
A: Technical documentation, including detailed installation and commissioning manuals, is provided. On-site supervision and commissioning support services are available upon request and can be discussed as part of the project scope.
Q8: What are the main application areas for this 33KV GIS with central metering?
A: It is suitable for urban power distribution networks, industrial parks, large commercial complexes, data centers, renewable energy integration substations, and any application where space is limited, reliability is critical, and centralized energy measurement is required.
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