Table of Contents

Product Introduction

HF series Current & Voltage Transformer Burden Boxes supply various effective loads for CT and VT verification, and are ideal supporting equipment for all transformer calibration systems.
Designed strictly in accordance with national standards JJG313-94 and JJG314-94 Verification Regulation for Current Transformers. It features large output capacity, complete load types, light weight, attractive appearance and excellent stability.

Alternative Names for HF-IT-209 Voltage Transformer Burden Box

Burden Box, Transformer Burden Box, Voltage Transformer Burden Box, Current Transformer Burden Box, VT Burden Box, CT Burden Box

Product Features

Light weight, elegant appearance, large capacity and outstanding stability.

Technical Parameters

Category	Parameter Item	Specification
Environmental Conditions	Operating Temperature	15 ~ 25°C
	Relative Humidity	<80% (at 25°C)
	Altitude	<1500 m
	Power Frequency	50 Hz
Technical Specifications	Rated Capacity (cosφ=0.8)	2.5 VA ~ 60 VA
	Rated Capacity (cosφ=1.0)	2.5 VA ~ 20 VA
	Current Range	1% ~ 120%
	Secondary Rated Current	5 A
	Power Factor	0.8, 1.0
	Measurement Accuracy	±3% ±0.0025 VA
	Withstand Test Voltage	2 kV
	Overall Dimensions (L×W×H)	250 × 350 × 175 mm
	Net Weight	8 kg

Packing List

No.	Description	Qty	Unit	Remarks
1	Voltage Transformer Test Power Supply	1	Set	Main unit
2	Power Input Cable	1	Pc
3	Test Output Connecting Wires	1	Set
4	User Operation Manual (English & Chinese)	1	Copy
5	Factory Test Report	1	Copy
6	Certificate of Calibration	1	Copy	Optional
7	Spare Fuse	2	Pcs
8	Export Wooden Case / Carton	1	Set	Packaging

FAQ for Voltage Transformer Test Power Supply

Q1: What is a Voltage Transformer Test Power Supply used for?

A: It provides stable, adjustable AC excitation voltage, mainly applied for voltage transformer error testing, calibration and characteristic inspection in labs and on-site substation commissioning.

Q2: What output characteristics does this power supply have?

A: It delivers continuously adjustable sinusoidal AC voltage with low distortion, offering steady output under varying load conditions to meet VT testing requirements.

Q3: Can it work with VT burden box?

A: Yes. It can be matched with Voltage Transformer Burden Box to simulate actual secondary load and complete full error verification of voltage transformers.

Q4: What frequency does the equipment support?

A: Standard model is designed for 50Hz power frequency; customized 60Hz version is available upon request.

Q5: Is it suitable for laboratory and field testing?

A: The unit features compact structure and reliable performance. It fits regular laboratory calibration work and mobile on-site commissioning tasks.

Q6: What safety protection functions are equipped?

A: Built-in over-current protection. It will cut off output automatically in case of short circuit or overload to protect the power supply and test samples.

Q7: Can it test both electromagnetic and capacitive voltage transformers?

A: It is applicable for conventional electromagnetic voltage transformers. Please confirm parameters in advance for capacitive VT testing.

Q8: What are the alternative names for this device?

A: VT Test Power Supply, Voltage Transformer Excitation Power Source, PT Test Power Supply.

Q9: Does the package include connecting cables and operation manual?

A: Standard package contains main unit, test wires, power cable and user manual. Factory test report can be provided as an option.

Q10: What ambient environment is recommended for operation?

A: Use in dry, ventilated environment, avoid strong electromagnetic interference, high humidity and corrosive gas to guarantee test accuracy.

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