TR AC Electrical Fire Monitoring Closed Loop Residual Zero-Phase Current Transformer
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Product Highlights
- High Precision Accuracy: Available in accuracy classes 0.2, 0.5, and 1.0 for different measurement requirements.
- Flexible Output Modes: Supports both socket and lead output methods for versatile application integration.
- Superior Balance Characteristics: Unbalanced current output is better than 30mA, 10mA, and 5mA with strong anti-interference.
- High Sensitivity Core: Adopts high magnetic permeability nickel steel or nanocrystalline magnetic core.
- Robust Construction: Casted with epoxy resin for good stability and flame retardant PBT/PC shell.
- Compliant Standards: Meets GB 14287.2-2014 and GB 13955-2005 requirements for electrical fire monitoring.
- Wide Operating Range: Rated input current 10mA~5A and linear range 5%~120% for diverse protection needs.
Product Attributes
- Customization
- Available
- Application
- Electronic, Instrument
- Type
- Current Transformer
- Model NO.
- TR21315B-001
- Phase
- Single
- Operation Condition
- Outdoor
- Usage
- Protection, Measurement
- Winding Form
- Small Fixed Type
- Insulating Medium
- Common Insulating Materials
- Installation
- Active Type
- Magnetic Circuit Structure
- Combined Type
- Voltage Transformation Principle
- Electromagnetic Type
- Rated Input Current (AC)
- 10mA~5A
- Rated Output (AC)
- 0~1V or 0~5mA
- Linear Range
- 5%~120%
- Voltage Level
- 0.4/0.66/0.72kV
- Transport Package
- Carton
- Trademark
- TR
- Origin
- China
- HS Code
- 850450
- Production Capacity
- 1000000
- Package Size
- 15.00cm * 15.00cm * 15.00cm
- Package Gross Weight
- 0.500kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
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Product Description
Flexible output mode, socket or lead output;
A variety of core hole diameter options, the hole diameter is from φ12mm to φ260mm;
Casting with epoxy resin, good stability;
Adopt high magnetic permeability nickel steel or nanocrystalline magnetic core, with good linearity and high sensitivity;
Excellent balance characteristics, with strong anti-electromagnetic interference ability.
| Product Parameters | ||||
Electric Performance Parameters |
Operating Temperature | -40ºC~+70ºC | Relative Humidity | ≤90% |
| Voltage Level | 0.4/0.66/0.72kV | Linear Range | 5%~120% | |
| Rated Input Current (AC) | 10mA~5A | Working Frequency | 45~1250Hz | |
| Rated Output (AC) | 0~1V or 0~5mA | Medium Strength: | 3000V AC/min | |
| Accuracy Class | 0.5, 1.0, 2.0 | Insulation Resistance | >500MΩ/500V DC | |
| Mechanical Structure Parameters |
Shell Material | PBT/PC Flame Retardant Grade 94-V0 | Output Method | Socket or Shielded Sheathed Wire |
| Iron Core Material | Nickel Steel or Ultra Microcrystalline | Construction Plan | Base installation bolts are fixed | |
| Sealing and Filling | Epoxy Resin | Environmental Requirements | Meet RoHS | |
| Typical Value of Main Products | |||||||
| Model NO. | Input current rated Value AC | Rated Continuous Thermal Current AC | Common Transformation Ratio | Accuracy Class | Secondary Load(Ω) | Dimensions(mm) | |
| ApertureD | Other size | ||||||
| TR21125B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2, 0.5 | ≤200 | 25 | L-W-H-J-A1-A2 80-22-69.5-68-5.2-8 |
| TR21126B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2, 0.5 | ≤500 | 45 | L-W-H-J-A1-A2 120-33-101.5-98-5.2-8.5 |
| TR21127B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2, 0.5 | ≤500 | 55 | L-W-H-J-A1-A2 150-35-126-126-5.2-12 |
| TR2174B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2, 0.5 | ≤500 | 35 | L-W-H-J-A1-A2 100-30-90-83.5-5.2-9.5 |
| TR21313B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2, 0.5 | ≤500 | 32 | L-W-H-J-A1-A2 91-28-70-80-5.5-7.5 |
| TR21314B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2, 0.5 | ≤500 | 45 | L-W-H-J-A1-A2 104-28-83-93-5.5-7.5 |
| TR21315B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2, 0.5 | ≤500 | 65 | L-W-H-J-A1-A2 126-28-105-115-5.5-7.5 |
| TR21316B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2, 0.5 | ≤500 | 80 | L-W-H-J-A1-A2 143-28-122-132-5.5-7.5 |
| TR21317B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2,0.5,1.0 | ≤500 | 105 | L-W-H-J-A1-A2 172-28-151-161-5.5-7.5 |
| TR21117B | 10mA~5A | 10A | 1000:1 2000:1 |
0.2,0.5,1.0 | ≤500 | 72 | L-W-H-J-A1-A2 175-42-150-150-6.2-13 |



About the Supplier
Company Profile
Hubei Tianrui Electronic Co., Ltd. Was founded in 1998, is a collection of scientific research, production, sales and service in one of the high-tech power electronics components. Focusing on the development of "Relay Protection and Power Automation", the company continues to provide complete sets of precision transformer solutions for domestic power equipment manufacturers, and is a well-known manufacturer of relay protection relays and a leader in the industry.
As one of the specialized research institutes for precision transformers in China, Tianrui successfully listed on the new three board in May 2016. In 2013, it passed the "Hubei Provincial Recognized Enterprise Technology Center" approved by the six ministries and commissions. Up to now, it has obtained 4 invention patents, 30 utility model patents and 5 appearance patents. At the same time, Tianrui Electronics has also made considerable progress in foreign technology exchanges, including Tianmen Institute of Electrical Instrumentation jointly established with the Provincial Bureau of Quality and Technical Supervision, an undergraduate internship base jointly established with Huazhong University of Science and Technology, Association to build academician expert workstations, and the provincial post-doctoral CMC's innovative practice base and other scientific research cooperation to further consolidate the Tianrui technology innovation soil, effectively protect the company's leading product technology.
Tianrui after nearly 20 years of focus on development, has now become the largest in the world for the protection of special transformer manufacturers in the industry has a wide range of visibility. The company is the CLP relay protection and automation equipment branch director unit, the CLP Power Grid Equipment Working Committee, the National Electrical Instrument Standardization Technical Committee, is also a precision micro-current, voltage transformer industry standard drafting unit. The company won the "Shou contract re-credit enterprises in Hubei Province" for 10 consecutive years, was rated as brand-name products and well-known trademarks in Hubei Province.
Tianrui product quality as the cornerstone of the company's development, the company in 2003 passed the ISO9001: 2000 quality management system certification, and in 2009 passed ISO9001: 2008 for version certification. ISO9001: 2015 in 2018. In the past 13 years, the company strictly follows the requirements of ISO9001 Quality System to ensure stable and reliable operation of customer equipment and has won unanimous endorsement from the industry.
Tianrui production efficiency as the engine for the development of the company, the company formed in 2007 on the industry's leading automated precision production technology transformation team, through nine years of unremitting efforts, has built five precision transformer automation production lines, And the current on-line operation of the "Tianrui ERP system" to achieve the information connection in the precision transformer industry took the lead in achieving the two production automation and information technology integration, effectively improve the production efficiency, precision transformers for automated production, Set an industry benchmark.
Tianrui serves customers as the company's development mission. In order to provide customers with more suitable supporting products and convenient technical services, Tianrui has set up two branch offices in Nanjing and Baoding and has branches in Shenzhen, Beijing, Zhuhai, Xuchang, Chengdu and Xi'an With a number of sales organizations, covering the geographical area of Europe, South America, South America, Asia, etc. The domestic electric power equipment manufacturing cluster,
About Our Factory & Business Background
- Address
- No. 8, Chuangye Avenue, Tianmen Economic Development Zone, Tianmen City, Hubei Province, Tianmen, Hubei, China
- Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays
Our Production Capability & Technical Expertise
Our Industry Experience & Global Business Record
- Export Year
- 2015-12-12
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
FAQ
- What accuracy classes are supported?
- The transformer supports accuracy classes of 0.2, 0.5, and 1.0, allowing users to select the precision level that best fits their technical requirements.
- What are the output method options?
- The product features flexible output modes, supporting both socket output and lead output (shielded sheathed wire) for easy installation.
- What standards does this product meet?
- This series of products meets the requirements of GB 14287.2-2014 and GB 13955-2005, ensuring compliance with electrical fire monitoring and protection standards.
- What is the rated input current range?
- The rated input current (AC) ranges from 10mA to 5A, providing versatility for various low-current measurement and protection applications.
- What materials are used for the magnetic core?
- The product adopts high-quality high-conductivity magnetic cores, specifically high magnetic permeability nickel steel or nanocrystalline magnetic core, ensuring high linearity and sensitivity.
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