Resonant frequency tester HZYA-2Z-I

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Product overview
The Huazheng HZYA-2Z-I is a portable handheld on-load switch tester with English menu prompts. It is compact, lightweight and designed for high anti-interference performance, reducing field operator workload. It is intended for testing on-load switches in power supply units and transformer manufacturing environments.

Main functional characteristics

• Portable device capable of high output current with field-friendly weight and size.
• Supports testing of Y and D connected transformers; transition resistance displayed directly without conversion.
• Includes winding-related functions; does not perform a separate dedicated winding resistance measurement.
• Resistance amplitude and timing values auto-adjust based on sampling values.
• 7-inch high-brightness touch color LCD; interface supports Chinese and English.
• Automatic local storage up to 500 data groups.
• Built-in lithium battery for outdoor use.
• Optional external printer connection for printing measurement data.

Technical specifications

• Model: HZYA-2Z-I
• Brand: Huazheng
• Output currents: 1.0 A / 0.5 A / 0.2 A
• Transition resistance ranges: 0.3 Ω–20 Ω (1.0 A); 5 Ω–40 Ω (0.5 A); 20 Ω–100 Ω (0.2 A)
• Transition time range: 0–320 ms
• Open circuit voltage: 24 V
• Measurement accuracy: resistance ±(5% ± 0.1 Ω); time ±(0.1% ± 0.2 ms)
• Resonant frequency: 20 kHz
• Data storage: local, up to 500 groups
• Display: 7-inch high-brightness touch LCD (Chinese/English)
• Power: built-in lithium battery (portable)
• Dimensions: main unit 252 × 160 × 65 mm; outer case 425 × 335 × 210 mm
• Weight: main unit ≈ 2 kg; outer case ≈ 8 kg
• Test lead length: standard 13 m (customizable)
• Operating conditions: -10 °C to 50 °C; ≤85% RH; power frequency 50 ± 1 Hz