A 250kV 100kVA AC test system gives a laboratory more voltage and current capacity for 11kV to 66kV insulator testing than a smaller 150kV/50kVA package.
This configuration should be considered when the buyer expects a wider product range, higher test voltages, or longer-term expansion of a high-voltage insulator test laboratory.
Source facts used
- Designed for electrical tests of 11-66kV glass, porcelain and polymer insulators.
- Applied standards include IEC 60060-1:2010 and IEC 60060-2:2010.
- Rated output is 100kVA, 250kV, 0.4A.
- Single-phase 50Hz system, voltage turns ratio 1000:1.
- Protective resistor is rated 250kV, 0.4A, 5kΩ; capacitive divider is rated 250kV AC, 300pF±2%.
Why buyers choose 250kV/100kVA
The higher rating can support a broader range of dry flashover, wet flashover, puncture and power frequency withstand tests.
It is especially relevant when a laboratory does not want to rebuild the test bay soon after adding higher-voltage products.
Scope items that must not be vague
The transformer, regulator, divider, protective resistor, control cabinet, software protection, grounding and physical safety barrier should be listed clearly.
The brochure also notes rapid hardware cut-off controlled by current and software protection, which should be reviewed during acceptance.
Compare capacity against real samples
Voltage rating alone is not enough. Product dimensions, test fixture, clearance, wet-test arrangement and report format all affect the final equipment scope.
If the lab mainly handles 33kV products, compare cost and space with the 150kV/50kVA option before ordering.
Buyer checklist
- Voltage class range
- Required IEC/customer tests
- Transformer output voltage and kVA
- Protection and cut-off logic
- Divider and resistor ratings
- Laboratory clearance
FAQ
When is 250kV/100kVA better than 150kV/50kVA?
When the lab covers higher test voltage, 66kV-class products, or future expansion beyond a narrow 33kV scope.
Should the test bay be planned before purchase?
Yes. Clearance, grounding and safety layout can determine whether the system can be used safely.
Need a practical recommendation? Send product drawings, voltage class, test standard, sample size and destination country through the Contune contact page.