Electrical Engineering Instrument Transformer Tester

• Customization: Available
• After-sales Service: Onsite and Video Call Remote Guidance
• Warranty: 2 Years Free Warranty Long Life Service
• Model NO.: SXFA
• Max Diameter of Workpiece: <500mm
• Mass Scope of Workpiece: <900kg
• Maxcapacity: Transformer Excitation Characteristic Test Set
• Accuracy Grade: 0.5
• Load Way: Electronic Load
• Loading Method: Dynamic Load
• Display: Digital
• Control: Manual Control
• Weight: 0-100Kg
• Power Source: AC220V
• Working Power Supply: AC220V±10V
• Power Input and Output Frequency: 50-60Hz
• Equipment Power Output Waveform: Sine Wave
• Operating Temperature: Standard Range: -10°C to 50°C
• Specification: ISO9001 SGS
• Trademark: Sansion
• Origin: China
• HS Code: 9030849000
• Production Capacity: 100 Units/Month

Product Description

Product Description

Volt-Ampere Characteristic Tester for Instrument Transformers

General Information:

Product introduction

The Instrument Transformer Volt-Ampere Characteristic Tester, also known as the Variable Frequency Instrument Transformer Tester or Comprehensive Instrument Transformer Tester, is a fully automated power testing instrument that utilizes variable frequency technology to test the characteristics of both Potential Transformers (PTs) and Current Transformers (CTs).

This variable frequency instrument transformer tester is specifically designed to perform the following tests:

CT and PT volt-ampere (V-A) characteristic tests
CT and PT polarity tests
CT and PT ratio and polarity tests
The comprehensive tester automatically calculates key parameters such as:

The error curve at any specified point on the CT
CT/PT transformation ratios
Ratio errors (ratio difference), and other relevant results
Developed and manufactured by Wuhan Sanxin Electric Power in compliance with Chinese national standards, industry standards, metrological standards, and IEC international standards, this instrument supports the testing of steady-state and transient parameters for various types of CTs and PTs—including protection-class, metering-class, and TP-class transformers.

It is a professional power testing instrument suitable for use in laboratories as well as in the power industry for instrument transformer evaluation.

The tester is widely applicable to:

Power maintenance departments
Instrument transformer manufacturers
National power inspection and calibration agencies
Equipped with built-in data storage and printing capabilities, it can generate and export test reports in Microsoft Word format for further analysis and printing via PC-based software.

Features:

Comprehensive functionality: Meets all testing requirements for various types of Current Transformers (CTs)—including protection-class, metering-class, and TP-class—such as excitation (volt-ampere) characteristics, transformation ratio, polarity, secondary winding resistance, burden, ratio error, and phase angle error. It also supports testing of Potential Transformer (PT) electromagnetic units for excitation characteristics, ratio, polarity, secondary winding resistance, and ratio error.
Built-in rechargeable lithium battery: Eliminates the need for an AC power supply. With a single wiring setup, the instrument can complete multiple CT tests—including DC resistance, excitation characteristics, ratio/polarity, and ratio/phase angle errors—significantly reducing workload, improving efficiency, and facilitating on-site calibration of instrument transformers.
Long battery life: A full charge enables testing of hundreds of CT windings. Testing can also be performed while the unit is charging.
Advanced variable-frequency method: Accurately measures CT/PT volt-ampere characteristic curves and error curves, supporting CTs with knee-point voltages up to 60 kV.
Voltage-based ratio testing: Capable of on-site testing of 0.2S-class current transformers. CT/PT ratio measurement range: 1 to 40,000.
Automatic parameter calculation: Instantly provides key performance parameters including knee-point voltage/current, 10% (or 5%) error curves, Accuracy Limit Factor (ALF), Instrument Security Factor (FS), secondary time constant (Ts), remanence factor (Kr), and saturated/unsaturated inductance for both CTs and PTs.
Standards compliance: Fully complies with GB1208 (IEC 60044-1), GB16847 (IEC 60044-6), GB1207, and other relevant instrument transformer standards. The device automatically selects the appropriate standard based on the transformer type and accuracy class.

Specifications:
1	Parameter	Specification
2	Test Applications	CT: Excitation characteristics, ratio, polarity, secondary winding resistance, secondary burden, current carrying test, ratio error, and phase angle error. PT: Excitation characteristics, ratio, polarity, secondary winding resistance.
3	Power Supply	Built-in lithium battery Charger input: AC 220V ±10%, 50/60 Hz
4	CT Ratio Accuracy	Range: 1 – 40,000 Accuracy: ±0.2%
5	PT Ratio Accuracy	Range: 1 – 40,000 Accuracy: ±0.5%
6	Phase Angle Measurement	Resolution: 0.5 arcmin Accuracy: ±2 arcmin
7	Secondary Winding Resistance	Range: 0 Ω – 300 Ω Accuracy: ±0.5% ± 2 mΩ
8	AC Burden Measurement	Range: 0 VA – 1300 VA Accuracy: ±0.5% ± 0.02 VA
9	Output	Output Voltage: 0 V – 120 V, up to 5 A RMS Voltage Measurement Accuracy: ±0.2%
10	Environmental Conditions	Operating Temperature: –10°C to +50°C Storage Temperature: –25°C to +70°C Relative Humidity: 5% – 95% RH (non-condensing)
11	Physical Dimensions & Weight	Dimensions: 370 mm × 300 mm × 150 mm Weight: ≈5 kg (excluding accessories)

Company Profile

About Sansion

Sansion Power Electric Co., Ltd was established in 2005, a technocrat who have rich experience of more than 10 years in R&D, manufacturing and marketing of power electrical testing products, which are widely used in the fields of power electric, railroad, energy conservation and environment protection, water conservancy, petrochemical industry, aerospace and etc.

Main products:

HV Hipot Test Set System

Transformer Test Equipment

HV Switchgear Test Set

Relay Protection Tester

CT/PT Tester

SF6/Oil Tester

Transmission Line Test System

Insulation Resistance Tester

Earth Resistance Tester

Customer Visit

Certifications

Packing & Delivery

FAQ

Q1: Is your company a sales company or a manufacturer?

A: Sansion Power Electric Co., Ltd. is an industrial and trade enterprise, with its own factory, self-produced and self-sold. We were founded in 2005 and have twenty years of production experience. Our company has reliable production lines, test rooms and R&D centers.

Q2: Whether the goods are in stock, whether they can be customized, and how long the delivery time is?

A: After the goods have been ordered, we can be made to order according to the special requirements of customers by using the latest technology. The delivery time is usually within 10 working days if there are no accidents.

Q3: Is the quality guaranteed?

A: In order to ensure quality, we use imported components in large quantities. After three times of quality inspection, the goods can be sent out, and the export is uniformly packed in non-fumigation wooden boxes.

Q4: What are the after-sales terms?
A: What are the after-sales terms?
We offer free consulting service, one year warranty, and adopt various methods such as email communication, video calls, technology door-to-door, aiming to solve any after-sales problems in a timely manner.

Q5: What are the cooperative countries or regions?

A: Products have been successfully exported to the United States, French ,Brazil, Australia, Spain, Portugal , Oman ,Russia, the Netherlands, Indonesia, Bangladesh, Saudi Arabia, Chile, Colombia, Panama, Malaysia  and other countries and regions.

Q6:In which fields can your product be applied?
A: Our services span key industries including Power, Railway, Energy Conservation & Environmental Protection, Water Conservancy, Petrochemicals, and Aerospace. Many of our products incorporate advanced international technologies and rank among the best in China. They have consistently excelled in national high-voltage testing competitions and earned widespread acclaim from our partners.