The rated voltage is 10kV, and the CT and PT functions are integrated in the design. The iron core is made of high permeability silicon steel sheets, and the shell is made of high-strength epoxy casting material, which is vacuum cast and precisely calibrated. It can accurately collect line current and voltage data simultaneously, fully meeting the measurement and billing, fault protection, and operation monitoring needs of 10kV~35kV medium and high voltage power grids. It strictly complies with international and domestic standards such as IEC 60044-1, IEC 60044-5, GB 1207, GB 1208, and is suitable for most countries' medium and high voltage power grid specifications. It is the preferred integrated measurement equipment for outdoor substations, distribution stations, industrial high voltage distribution, new energy boosting stations, and other scenarios.
Product Parameter
|
Parameter Name |
Technical Specifications |
|
Rated Voltage (PT) |
10kV (Um=12kV) (6kV/20kV/35kV can be customized) |
|
Rated Secondary Voltage (PT) |
100V/√ 3 (for metering/measurement purposes), 100V (for protection purposes) |
|
Rated Primary Current (CT) |
100A/200A/300A/400A/630A (customizable) |
|
Rated Secondary Current (CT) |
5A/1A (standard configuration, customizable) |
|
Accuracy Class |
CT: Measurement level 0.2S/0.5S, protection level 5P10/5P20; PT: Measurement level 0.2/0.5, protection level 3P/6P (customizable in combination) |
|
Rated Burden |
CT side: 5VA/10VA/15VA; PT side: 10VA/15VA/20VA (cos φ=0.8 hysteresis) |
|
Core Material |
High permeability silicon steel sheet |
|
Housing Material |
High strength Epoxy Resin Casting |
|
Insulation Level |
12kV/42kV/105kV (lightning impulse/power frequency withstand voltage without breakdown) |
|
Dielectric Loss (PT) |
≤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 anti electromagnetic interference capability |
|
Installation method (Mounting Type) |
Pillar installation/base fixation (compatible with cement foundation/steel structure support) |
|
Creepage Distance |
≥ 315mm (10kV level, compliant with pollution level II) |
|
CT rated short-time thermal current |
31.5kA/1s (higher specifications can be customized) |
Product feature and application
Integrating CT (current transformer) and PT (voltage transformer) functions into one, without the need to install two separate devices, greatly saving installation space in substations and distribution stations, especially suitable for compact distribution scenarios with limited space.
-Synchronous measurement, precise data:
CT and PT units work together to synchronously collect line current and voltage data, avoiding measurement deviation caused by separate installation, providing accurate and synchronized data support for energy measurement, power calculation, and fault analysis.
With an integrated structural design, only one positioning, installation, and wiring are required. Compared to traditional separate installation methods, it can reduce construction workload by more than 50%, shorten the construction period, and lower installation costs.
The high-strength epoxy casting shell is made by vacuum casting technology, with excellent insulation performance, sufficient creepage distance, and can withstand medium and high voltage impacts. It can operate outdoors for a long time without insulation aging or leakage risks, and has a protection level of IP65.
Supports voltage levels of 6kV~35kV, multi specification CT/PT parameter customization, can combine "metering level+protection level" dual precision configuration, adapts to different medium and high voltage distribution capacities and scene requirements, and meets global multi regional power grid standards.
It can be used in various scenarios.
-Outdoor power distribution field: Measurement and protection of medium and high voltage lines in outdoor substations, distribution stations, and switching stations, suitable for outdoor installation scenarios with limited space.
-Industrial high-voltage field: high-voltage distribution networks for heavy industries such as metallurgy, chemical engineering, steel, and building materials, adapted to high load and high-precision measurement needs, and simplified workshop high-voltage distribution layout.
-In the field of new energy, box type boosting stations for photovoltaic power plants and wind power plants, distributed photovoltaic high-voltage side, synchronously collect current and voltage data, and adapt to the measurement needs of new energy grid connection.
-Power grid upgrade and renovation: Upgrading and renovating old substations and distribution stations, replacing traditional split CT/PT, improving measurement accuracy, and saving installation space.
-In the field of municipal power distribution, high-voltage power distribution systems for urban industrial parks, high-rise buildings, and large commercial complexes are designed to meet the requirements of compact power distribution.
-Overseas engineering field: Overseas medium and high voltage distribution projects, power grid construction projects. CT/PT parameters can be customized according to local power grid standards to meet the needs of overseas markets.
Production details
1. Integrated Core Coil Unit
Using high-quality silicon steel sheets with high magnetic permeability, CT and PT independent core coil units are designed separately to ensure that their functions do not interfere with each other and achieve structural integration; The coil is made of highly conductive copper material, precision wound, with precise turns and minimal hysteresis and eddy current losses, ensuring long-term stability of CT and PT synchronous measurement accuracy.
2. Compact Integrated Structure
Optimize the layout of CT and PT units, adopt a compact integrated design, reduce the volume by more than 40% compared to traditional split type equipment, and be lighter in weight; The main body is rigidly connected to the base, with a low center of gravity and strong stability, and can be directly installed on outdoor brackets or cement foundations, suitable for limited space scenarios.
3. High strength Insulation Housing
Made from imported high-quality epoxy resin through vacuum casting and high-temperature curing processes, the shell is dense and bubble free, with excellent insulation performance; It has outstanding UV resistance, aging resistance and corrosion resistance, can withstand outdoor rain, dust, temperature difference and other harsh environments for a long time, and can effectively protect internal CT/PT units.
4. Synchronous Metering Wiring Unit
Equipped with independent CT and PT terminal blocks, clearly labeled (CT: "P1/P2" and "S1/S2"; PT: "primary side" and "secondary side"), for easy wiring operation, and can quickly achieve synchronous wiring of current and voltage; The terminals are made of copper material, which has good conductivity and low contact resistance, avoiding measurement errors caused by loose wiring.
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 and dust from entering the interior of the equipment and ensuring long-term stable operation of the CT/PT unit.
Product Certification
Sunrise adheres to the bottom line of quality, and the SR-CTPT series combination CT PT transformers have passed multiple international authoritative certifications, ensuring that the products meet global market access standards and providing customers with solid quality assurance.
FAQ
Q: Does the combined CT PT comply with our country's power grid standards and adaptation scenario requirements?
A: Yes. This product strictly complies with international standards IEC 60044-1 (CT standard) and IEC 60044-5 (PT standard), and is also compatible with national standards GB 1207 (PT) and GB 1208 (CT), as well as regional standards such as ANSI C57.13 (USA) and BS EN 60044 (UK); Supporting voltage levels of 6kV~35kV and customized CT/PT parameters in multiple specifications, it can accurately match the requirements of mainstream global medium and high voltage power grid specifications and space limited distribution scenarios. We have provided adaptable combined CT PT products for distribution projects in over 70 countries worldwide, with rich experience in adapting to overseas markets.
Q: How to choose the appropriate combination CT PT voltage level, CT current, and PT voltage parameters?
A: The selection criteria are as follows: ① Voltage level (PT): Select according to the rated voltage of the medium and high voltage power grid where it is located (such as selecting the 10kV level for a 10kV power grid), with a reserved voltage margin of 10% to 20%; ② CT rated current: Select based on the maximum operating current of the line, with a 20%~30% margin reserved (if the maximum operating current is 300A, a 400A rated current CT can be selected); ③ PT secondary voltage: Match the rated voltage of the secondary side instrument/protection device (if paired with a 100V/√ 3 instrument, select a 100V/√ 3 secondary voltage). We can provide accurate selection solutions for free based on the grid parameters and instrument specifications you provide.
Q: Will the combination design affect the measurement accuracy and mutual interference of CT and PT?
A: No. This product adopts the design of CT and PT independent iron core coil units, with separate physical structures and no electromagnetic interference between the two; Simultaneously optimizing the electromagnetic shielding structure, with built-in multi-layer shielding covers, can effectively isolate external electromagnetic interference and weak interference between internal units, ensuring that the measurement accuracy of CT and PT does not affect each other. The product has undergone precise calibration, with CT measurement accuracy error ≤ 0.2% and PT measurement accuracy error ≤ 0.2%, which is consistent with the accuracy of split CT/PT and can achieve synchronous and accurate measurement. It has been verified in multiple distribution scenarios.
Packing & Shipping
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