High-voltage hipot tester SBF

ACelectrical conformitymulti-point

Product introduction
The SBF Triple‑Frequency Induction HV Test (Withstand Voltage Tester / High‑Voltage Generator) is a specialized transformer‑type test unit designed for induction withstand voltage testing of voltage transformers, phase‑splitting tests on power transformers and induction testing of motor windings and small transformers. The device uses a three‑core five‑column magnetic structure enabling the core to operate above saturation to produce the required induction characteristics. Designed with reference to GB311‑61 and preventive test codes for electrical equipment. It can also be used as a short‑duration 150 Hz power source for test arrangements.

Applications

• Frequency‑doubling induction withstand voltage tests for voltage transformers (commonly for 35–220 kV cascade VT testing).
• Phase‑splitting frequency‑doubling induction withstand voltage tests for power transformers.
• Induction withstand voltage tests for other coil‑type electrical products and induction tests on motor windings and small transformers.

Technical parameters

• Input voltage: three‑phase 380 V, 50 Hz.
• Output voltage (single‑phase, 150 Hz): 300 V / 500 V / 800 V / 1000 V (higher voltages require external step‑up transformer).
• Output capacity: 20% of rated product capacity (short‑duration usage).
• Harmonic distortion: <5%–8%.
• No‑load allowed operation time: ≤5 minutes.
• Typical test duration at rated voltage: 40 seconds.

Key characteristics

• Three‑core five‑column design with core operating above saturation to achieve induction function for frequency‑doubling tests.
• Capable of evaluating main and secondary insulation strength and performing induction tests on motor windings and small transformers.
• Can serve as a short‑duration 150 Hz power supply for specific test setups.

Standards & technical specifications

• Reference standards: GB311‑61 and relevant preventive test codes for electrical equipment.
• Model/series: SBF.
• Manufacturer: Wuhan UHV.
• Primary uses: AC induction withstand voltage testing for 35–220 kV cascade voltage transformers; induction testing of motor windings and small transformers; short‑term 150 Hz power supply for tests.
• Input: 3×380 V, 50 Hz.
• Outputs: 300/500/800/1000 V single‑phase @150 Hz (external step‑up for higher voltage).
• Output capacity: 20% rated capacity.
• Harmonic distortion: <5%–8%.
• No‑load operation limit: ≤5 minutes; test duration at rated voltage: typically 40 seconds.