
Partial discharge is invisible – no sparks, no sounds, no smells – it’s only picocoulombs ofelectrical
Trustworthy and precise current transformer burden boxes are now available at DEMIKS. As one of the most prominent manufacturers and suppliers in China, we pride ourselves in maintaining the highest standards of quality across all our products. With painstaking attention to detail, our burden boxes guarantee precise measurement of the performance of current transformers. For all your current transformer burden box requirements, trust DEMIKS. You can reach out to us today for further details.
Objective: The burden box is meant for testing current transformers CTs and voltage transformers VTs to check their ratio and phase errors calibration during different load level conditions.
Highlights: Low weight, aesthetic appearance, and high range of current values.
Use: Used as a fundamental auxiliary instrument for calibrating the transformer systems.
| Power Factor | 0.8, 1.0 selectable |
|---|---|
| Rated Current | 1A, 5A |
| Rated Voltage | 100V or 100√3 V |
| Current Range | 5% to 120% of rated |
| Voltage Range | 20% to 120% of rated |
| Rated Capacity - Current: | 2.5-60VA |
| Voltage: | 1.25-158.75VA |
| Accuracy - Current: | ±3% ±0.025VA |
| Voltage: | ±3% ±0.1VA |
| Rated Frequency | 50Hz |
Revolutionized Testing for Transformers: The DDY-409D Burden Box is best known in the industry for providing accurate performance throughout varying operational conditions during the execution of current transformers (CTs) and voltage transformers (VTs) testing.
A Necessity for Precision of Calibration: Its valuable services are most notable in calibration systems of a transformer in checking with definitive loads to validate ratio and phase errors at various conditions of the selected level of load.
Sophisticated Yet Portable Design: The burden box is beautifully crafted which makes it effortlessly globetrotting without compromising on space or weight making it aesthetically sleek for operational environments.
Wider Scope of Testing: The varying ranges of current flowing through the transformer will allow the user to carry out numerous testing applications without worrying about the versatility.
| Parameter | Value |
|---|---|
| Temperature | 15~25℃ |
| Humidity | <80% (at 25℃) |
| Altitude | <1500m |
| Power Frequency | 50Hz |
| Current (COS 0.8) | 2.5VA~60VA |
| Current (COS 1.0) | 2.5~5VA |
| Current Range | 1%~120% |
| Voltage Range | 20%~120% |
| Secondary Voltage | 1.25VA~158.75VA |
| Secondary Current | 5A |
| Current Accuracy | ±3% ± 0.0025VA |
| Voltage Accuracy | ±3% ± 0.05VA |
| Power Factor | 0.8, 1.0 |
| Size | 340×350×175mm³ |
| Experimental Voltage | 2kV |
| Weight | 15kg |
Recognize the role of CT burden in electrical engineering systems. Understand its importance in safety concerns, efficacy, precision, and the reasons it warrants the attention of engineers.

Partial discharge is invisible – no sparks, no sounds, no smells – it’s only picocoulombs ofelectrical

In the course of setting up a plan for diagnostics of an electrical asset (a cable,

Partial discharge testing gets criticized as being too complicated- circuits have way too many components, there
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