The rated voltage is 110kV, and it adopts an integrated structure design of capacitor voltage division and electromagnetic induction. The capacitor unit is made of high-quality capacitor paper/metalized film, the iron core is made of high permeability silicon steel sheet, and the shell is made of high-strength epoxy casting/metal sealing material, which is vacuum cast and precisely calibrated. Fully meet the voltage measurement, fault protection, and power quality monitoring needs of 110kV~500kV high-voltage power grids, strictly comply with international and domestic standards such as IEC 60044-5, GB 1207, ANSI C57.13, and adapt to the high-voltage power grid specifications of most countries around the world. It is the preferred voltage measurement equipment for outdoor substations, high-voltage transmission lines, GIS equipment, converter stations, and other fields.
Product Parameter
|
Parameter Name |
Technical Specifications |
|
Rated Voltage |
110kV (Um=126kV) (35kV/220kV/330kV/500kV customizable) |
|
Rated Secondary Voltage |
100V/√ 3 (for metering/measurement purposes), 100V (for protection purposes) |
|
Accuracy Class |
Measurement level: 0.2/0.5; Measurement level: 0.5/1.0; Protection level: 3P/6P (customizable in combination) |
|
Rated Burden |
Measurement side: 10VA/15VA; Protection side: 20VA/30VA (cos φ=0.8 hysteresis) |
|
Capacitive Voltage Division Ratio |
110kV/100V/√ 3 (accurately matched according to voltage level, customizable) |
|
Rated Capacity |
High voltage capacitor: 1000pF~3000pF; Medium voltage capacitor: 10000pF~30000pF (customizable) |
|
Core Material |
High permeability silicon steel sheet |
|
Housing Material |
Epoxy Resin Casting/Metal Sealed Housing |
|
Insulation Level |
126kV/450kV/1050kV (lightning impulse/power frequency withstand voltage without breakdown) |
|
Dielectric Loss |
≤0.005(20℃,50Hz) |
|
Rated Operating Temperature |
-40℃ ~ 70℃ |
|
Protection Class |
IP65 (outdoor type)/IP54 (indoor type) |
|
Electromagnetic Compatibility (EMC) |
Compliant with IEC 61000-4 standard, strong resistance to electromagnetic interference and ferromagnetic resonance |
|
Installation method (Mounting Type) |
Pillar installation/base fixation (compatible with cement foundation/steel structure support) |
|
Creepage Distance |
≥ 1020mm (110kV level, compliant with pollution level II) |
Product feature and application
Designed based on the principle of capacitive voltage division, it can stably adapt to 110kV~500kV high voltage power grids without the need for direct voltage division of high voltage windings. The insulation structure is more reliable, effectively avoiding the risk of high voltage breakdown and adapting to the needs of ultra-high voltage scenarios.
-Excellent insulation, safe and durable:
The epoxy cast/metal sealed shell is made by vacuum casting technology, with excellent insulation performance, sufficient creepage distance, low dielectric loss, and can withstand lightning strikes and power frequency withstand voltage. There is no risk of insulation aging during long-term outdoor operation.
High permeability silicon steel sheet iron core combined with precision capacitor voltage divider unit, measurement accuracy reaches 0.2 level, with small error and long-term stability, not affected by grid voltage fluctuations and frequency deviations, meeting high-precision measurement and monitoring needs.
Optimized electromagnetic shielding structure, with outstanding anti electromagnetic interference and anti ferromagnetic resonance capabilities, it can operate stably in strong electromagnetic environments such as substations and converter stations without the risk of resonance misoperation.
Supports voltage levels of 35kV~500kV, customized voltage division ratios of multiple specifications of capacitors, and can combine "metering level+protection level" dual precision to adapt to different high-voltage power grid capacities and scene requirements, meeting global multi regional power grid standards.
It can be used in various scenarios.
-In the field of high-voltage transmission: voltage measurement and protection for 110kV~500kV high-voltage transmission lines and outdoor substations, providing accurate data support for power dispatching and energy statistics.
-GIS equipment matching: Gas insulated switchgear (GIS), high-voltage measurement of compact substations, suitable for space limited scenarios, and strong compatibility with GIS equipment.
-In the field of converter stations: voltage monitoring for high-voltage converter stations and flexible DC transmission projects, adapted to complex operating environments with high harmonics and strong interference.
-Industrial high-voltage field: high-voltage distribution networks for heavy industries such as metallurgy, chemical engineering, and nuclear power, suitable for high load and high reliability voltage measurement needs.
-Power grid upgrade and renovation: Upgrading old substations, expanding high-voltage power grids, replacing traditional voltage transformers, and improving measurement accuracy and operational reliability.
-Overseas engineering field: Overseas high-voltage power grid construction, new energy power station (wind/photovoltaic) booster station projects, can customize voltage levels and voltage division ratios according to local power grid standards to meet the needs of overseas markets.
Production details
1. High precision capacitive voltage division unit
Using high-quality capacitor paper, metalized film, and high-purity insulating oil, the capacitor unit is made through vacuum impregnation process, with stable capacitance value and low dielectric loss; The voltage divider ratio has been precisely calibrated with minimal error, enabling precise high-voltage voltage division and providing a stable signal source for subsequent measurements.
2. High permeability core coil
High permeability and high-quality silicon steel core are selected, processed through precision lamination and vacuum annealing processes, resulting in minimal hysteresis and eddy current losses; The coil is made of highly conductive copper material, precision wound, with precise turns, which can effectively improve measurement accuracy and enhance the ability to resist ferromagnetic resonance.
3. High strength Insulation Housing
The epoxy casting type shell is made of imported high-quality epoxy resin, vacuum casting, and high-temperature curing. The shell is dense without bubbles and has excellent insulation performance; The metal sealed shell is made of corrosion-resistant alloy material, with good sealing performance, which can effectively protect internal components from outdoor harsh environment erosion, and the protection level reaches IP65.
4. Anti interference shielding structure
Built in multi-layer electromagnetic shielding cover, made of highly conductive metal material, can effectively isolate external electromagnetic interference; Optimize the layout of the iron core and coil, suppress the occurrence of ferromagnetic resonance, and ensure stable measurement data without distortion or misoperation in strong electromagnetic environments.
5. Stable Base&Sealing Structure
The base is made of high-quality steel plate, which has been treated with anti-corrosion and galvanizing. It is rust resistant, corrosion-resistant, and has strong load-bearing capacity. It can be firmly connected to cement foundations or steel structure supports; Equipped with dedicated sealing gaskets and sealants, the sealing performance is reliable, preventing rainwater, dust, and oil from entering the interior of the equipment, ensuring long-term outdoor operation stability.
Product Certification
Sunrise adheres to the bottom line of quality, and the SR-CVT series capacitive voltage transformers have passed multiple international authoritative certifications to ensure that their products meet global market access standards and provide customers with solid quality assurance.
FAQ
Q: Does the CVT comply with our country's power grid standards and high-voltage scenario requirements?
A: Yes. This product strictly complies with the IEC 60044-5 international standard (special requirements for capacitive voltage transformers), and can also adapt to regional standards such as ANSI C57.13 (USA), BS EN 60044-5 (UK), VDE 0414 (Germany), etc; Support customized voltage levels of 35kV~500kV, which can accurately match the global mainstream high-voltage power grid specifications and scene requirements. We have provided adaptive CVT products for high-voltage power grid projects in over 70 countries worldwide and have extensive experience in adapting to overseas markets.
Q: How to choose the appropriate CVT voltage level and capacitor voltage division ratio?
A: The selection criteria are as follows: ① Voltage level: Select according to the rated voltage of the high-voltage power grid (such as choosing 110kV CVT for 110kV power grid), and it is recommended to reserve 10% to 20% voltage margin; ② Capacitor voltage division ratio: Match the rated voltage of the power grid with the rated voltage of the secondary side instrument/protection device (e.g. 110kV power grid with 100V/√ 3 secondary instrument, select 110kV/100V/√ 3 voltage division ratio). We can provide free professional selection solutions based on the grid parameters and instrument specifications you provide.
Q: What precautions should be taken during installation? How to avoid ferromagnetic resonance?
A: Installation precautions: ① Connect the wires correctly according to the markings "primary side/secondary side" to ensure consistent voltage polarity and avoid measurement errors; ② The base must be firmly fixed and connected to the foundation with high-strength bolts to prevent loosening caused by outdoor wind vibration; ③ Outdoor installation requires checking the sealing structure to ensure reliable sealing and prevent rainwater from entering; ④ After wiring, it is necessary to tighten the secondary cable to avoid pulling and loosening the wiring. Avoid ferromagnetic resonance: This product has a built-in anti resonance structure, which ensures that the secondary side is not unloaded or open circuited during installation. By connecting the instrument/protection device according to specifications, ferromagnetic resonance can be effectively suppressed without the need for additional anti resonance devices.
Packing & Shipping
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