Product Introduction
The GTB 5kVA Pointer Dry Type AC/DC Hipot Tester is a robust, analog test set designed for dielectric withstand testing on high-voltage equipment such as transformers, cables, and switchgear. Its key features include a 5kVA power rating, which provides sufficient output to effectively test capacitive loads, and a dry-type design that uses air instead of oil for insulation, making it more environmentally friendly and easier to maintain. The pointer-style analog meters offer clear, real-time voltage and leakage current readings, while the simple, manual operation ensures reliability and durability in demanding industrial environments. This tester is ideal for applications where digital automation is not required, but proven performance and straightforward functionality are essential.
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פרמטרים טכניים
| impedance voltage | ≤12% |
| output voltage wave form | sinusoid |
| surface temperature rise | ＜55℃ |
| no-load current | ＜4% |
Main product specifications
| specifications and models | capacity(kVA) | input voltage(V) | output voltage(kV) | output current(mA) | פלט מתח גבוה DC | weight(kg) |
| 1.5/50 | 1.5 | 200 or 400 | 50 | 30 | 70 | 15 |
| 5/15 | 5 | 333 | 15 | |||
| 3/50 | 3 | 60 | 20 | |||
| 5/50 | 5 | 100 | 27 | |||
| 6/50 | 6 | 120 | 30 | |||
| 10/30 | 10 | 333 | 30 | |||
| 10/50 | 10 | 200 | 40 | |||
| 15/50 | 15 | 300 | 50 | |||
| 20/50 | 20 | 400 | 55 | |||
| 25/50 | 25 | 500 | 60 | |||
| 30/50 | 30 | 600 | 65 | |||
| 15/25 | 15 | 220 | 25 | 600 | 200 | 72 |
| 5/100 | 5 | 200 or 400 | 100 | 50 | 140 | 60 |
| 10/100 | 10 | 100 | 65 | |||
| 10/120 | 10 | 120 | 70 | |||
| 15/100 | 15 | 150 | 75 | |||
| 20/100 | 20 | 200 | 75 | |||
| 25/100 | 25 | 250 | 80 | |||
| 15/120 | 15 | 120 | 125 | / | 120 | |
| 20/120 | 20 | 160 | 130 | |||
| 25/120 | 25 | 200 | 140 | |||
| 30/120 | 30 | 250 | 150 |
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Advantages and disadvantages of dry-type transformers
Advantages | Shortcoming |
Safe and environmentally friendly: No need to use oil or other flammable liquids, eliminating the risk of fire or environmental pollution caused by leaks or spills. Very suitable for hospitals, schools, and high-rise buildings. | Higher initial cost: Manufacturing involves advanced insulation materials and packaging processes, which makes the initial cost of dry-type transformers higher than that of oil filled transformers. |
Easy installation: No need for enclosed pits or oil treatment equipment, simplifying the installation of basements, plant rooms, and indoor spaces. | Air flow or fans are required for cooling: relying on air circulation to dissipate heat, additional ventilation systems or enclosed space fans may be needed. |
Low maintenance: No need for testing, filtering, or changing oil, regular inspections and dust removal are usually sufficient. | Slightly higher losses: Due to the lower heat dissipation capacity of air compared to oil, the core and copper losses may be slightly higher. |
Excellent fire resistance: The sturdy insulation and non combustible materials reduce the risk of ignition and enhance the safety of fire sensitive areas. | Possible noise in enclosed spaces: Air flow and magnetic vibrations may produce audible buzzing sounds, particularly noticeable in quiet indoor environments. |
Strong short-circuit durability: The rigid winding and sturdy mechanical design can withstand high fault currents without significant deformation. | Shutdown cleaning is required: Accumulated dust or debris must be regularly removed to maintain insulation performance and cooling efficiency. |
Suitable for damp or polluted places: The encapsulated winding can resist moisture, chemicals, and corrosive gases, ensuring reliability in coastal, mining, or industrial places. | Dust accumulation may pose risks: In open ventilation systems, dust in the air can deposit on the coils, affecting heat transfer or insulation strength over time. |
Application Scenarios
Electrical equipment testing for urban indoor and underground substations
On site inspection of flammable and explosive high-risk industrial and mining enterprises
On site handover test for power infrastructure projects
Emergency repair and daily operation and maintenance test of power system
Application of Special Environment and Teaching and Research Scenarios
Frequently Asked Questions
Q: What is the normal service life of dry-type transformers?
A: Under normal operation and maintenance conditions, the average service life of dry-type transformers can reach about 30 years, which is much higher than that of oil immersed transformers.
Q: Do dry-type transformers require regular replacement of insulation oil?
A: Dry type transformers themselves do not use insulating oil, and there is no need to change the oil during operation. They only need to regularly clean the surface dust, making operation and maintenance very easy.
Q: Is it necessary to use dry-type transformers in low-power scenarios?
A: If the scene has high requirements for fire protection, even if the load power is small, dry-type transformers can be used to further improve the safety level of the entire distribution system.
