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HF-IT-208 CT Burden Box
The CT Burden Box offers continuously adjustable simulated burden loads for current transformers. It creates standard secondary load conditions to verify CT accuracy performance and assist protective relay commissioning in laboratories and substations.
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The HF series Current & Voltage Transformer Burden Boxes provide standardized effective loads for the verification of current transformers and voltage transformers, acting as perfect matching accessories for all kinds of transformer calibration test systems.
Developed strictly complying with national standards JJG313-94 and JJG314-94 Verification Regulation for Current Transformers. It boasts prominent advantages including large output capacity, comprehensive load options, lightweight structure, neat appearance and superior long-term stability. It can simulate various actual secondary burden conditions to accurately assess transformer ratio error and phase displacement during laboratory testing and on-site calibration.
Developed strictly complying with national standards JJG313-94 and JJG314-94 Verification Regulation for Current Transformers. It boasts prominent advantages including large output capacity, comprehensive load options, lightweight structure, neat appearance and superior long-term stability. It can simulate various actual secondary burden conditions to accurately assess transformer ratio error and phase displacement during laboratory testing and on-site calibration.
Alternative Names for Current Transformer Burden Box
Burden Box, Transformer Burden Box, Current Transformer Burden Box, Voltage Transformer Burden Box, CT Burden Box
Product Features
Light weight, compact and elegant appearance, large rated capacity, excellent working stability.
Supports flexible burden adjustment to recreate real secondary circuit load scenarios, widely adopted in metrology institutes, power laboratories and transformer manufacturing workshops for routine accuracy tests.
Supports flexible burden adjustment to recreate real secondary circuit load scenarios, widely adopted in metrology institutes, power laboratories and transformer manufacturing workshops for routine accuracy tests.
Current Transformer Burden Box 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 |
FAQ for CT Burden Box
Q1: What is a CT Burden Box used for?
A: The CT Burden Box provides adjustable standardized simulated secondary burden for current transformers. It simulates actual circuit load conditions to test CT ratio error and phase displacement during verification and commissioning.
Q2: What power factors does this burden box support?
A: It supports two power factors: cosφ=0.8 and cosφ=1.0, meeting standard CT calibration requirements.
Q3: What is the adjustable capacity range?
A: At cosφ=0.8: 2.5VA ~ 60VA; At cosφ=1.0: 2.5VA ~ 20VA.
Q4: What secondary current is this unit designed for?
A: Designed for standard CT secondary current of 5A.
Q5: What is the measurement accuracy?
A: Accuracy: ±3% ±0.0025VA, satisfying national and international CT calibration standards.
Q6: What is the withstand test voltage of the burden box?
A: Dielectric test voltage is 2kV.
Q7: What ambient conditions are required during operation?
A: Operating temperature: 15~25°C; Humidity <80% (25°C); Altitude below 1500m; Power frequency 50Hz.
Q8: Can it be matched with any CT tester?
A: Yes. It is ideal supporting equipment for all types of current transformer calibration test systems, widely used in metrology laboratories and CT manufacturers.
Q9: What are alternative names for CT Burden Box?
A: Transformer burden box, Current transformer burden box, CT load box.
Q10: Is the unit portable?
A: Net weight is 8kg with compact dimensions (250×350×175mm). It is convenient for laboratory use and short-distance transport.
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