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High-Precision Tdt Transformer Insulation Tester for Power Factor. Wide Output Voltage Range: Adjustable output from 0.5KV to 10KV with 0.1KV steps. Anti-Interference Capability: Features frequency conversion technology to avoid power frequency interference. Fast Response Support: Customer questions are replied to within 12 hours. Comprehensive Warranty: 365 days warranty coverage for all mechanical defects. Quick Delivery: 7 days lead time after order confirmation. Multiple Frequency Options: Supports 50Hz, 47.5Hz/52.5Hz, 45Hz/55Hz, 60Hz, 57.5Hz/62.5Hz, and 55Hz/65Hz. Integrated Structure: Combines dielectric loss test bridge, variable frequency power supply, and step-up transformer.