Capacitance tester HZ-2400H

high-voltagedielectricelectrical insulation

Product overview
The HZ-2400H dielectric loss tester measures capacitance and dielectric loss (tgδ) for transformers, reactors, capacitors, bushings and surge arresters. It is designed for on-site acceptance, maintenance and preventive testing in electrical manufacturing and substations, providing reliable insulation condition assessment and local defect detection.

Features

• Fourier-transform digital filtering for high-precision measurement of capacitance and tgδ, supporting automatic measurement procedures.
• Frequency‑conversion anti‑interference technology to eliminate 50 Hz power‑frequency noise; maintains accuracy under strong electromagnetic interference.
• Variable‑frequency high‑power switching supply with pure sine outputs (45 Hz / 55 Hz) and up to 10 kV output capability; Buck‑Boost voltage selection supported.
• Full‑touch large LCD with graphical interface for intuitive operation and minimal training.
• Internal calendar chip and large-capacity memory for timestamped storage of results; historical records viewable and printable.
• Data export via U‑disk and PC management through dedicated software; computer interface (RS232) for remote control and data integration.
• Microprocessor‑controlled automated test sequences selectable by method.
• Integrated model option with standard capacitor and HV supply to simplify on‑site wiring.
• Oil dielectric loss measurement supported with standard oil cup and dedicated test leads.
• Reverse‑wiring low‑voltage shielding function enabling certain measurements without disconnecting grounded CVT bus wiring.
• AC withstand (hipot) test capability for PT/CT and low‑voltage systems (e.g., 400 V).
• Detection of external HV supply frequency between 40–70 Hz and support for industrial or series‑resonant supplies for large‑capacity HV tests.
• CVT test functions: self‑excitation testing, automatic C1/C2 capacitance and dielectric loss measurement, total CVT capacitance/tgδ measurement and four protection limits (HV/LV and current).
• CVT ratio, polarity and phase error measurement.
• Four‑channel simultaneous measurement for three‑phase and neutral‑point bushing testing.
• Built‑in thermal printer for on‑site reports; U‑disk output for file export.
• Centralized control: a PC can control up to 32 instruments for integration into high‑voltage test vehicles.
• Safety protections: grounding detection (no HV output if not properly grounded), over‑current protection and electric‑shock cutoff (immediate HV shutdown on detected operator shock).
• Optional GPS module for test location stamping.

Technical specifications

• Model: HZ-2400H
• Capacitance accuracy (Cx): ±(reading × 1% + 1 pF)
• tgδ accuracy: ±(reading × 1% + 0.00040)
• Anti‑interference: frequency‑conversion; specified accuracy achievable under up to 200% interference
• Resolution: up to 0.001 pF (4 significant digits)
• tgδ range: unlimited, resolution 0.001%
• Automatic identification of sample type: capacitance / inductance / resistance
• Test current range: 10 μA ~ 5 A
• Internal HV capacitance ranges: 3 pF ~ 60000 pF @ 10 kV; 60 pF ~ 1 μF @ 0.5 kV
• External HV capacitance ranges: 3 pF ~ 1.5 μF @ 10 kV; 60 pF ~ 30 μF @ 0.5 kV
• Internal HV set voltage range: 0.5 ~ 10 kV (12 kV optional)
• Maximum internal output current: 200 mA
• Reverse‑wiring maximum test current: 10 kV / 5 A (power‑frequency or frequency‑conversion 40–70 Hz)
• CVT self‑excited low‑voltage output: 3 ~ 50 V, 3 ~ 30 A
• Transformation ratio measurement accuracy: ±(reading × 1%), range 10 ~ 99999
• Phase measurement accuracy: ±0.1°, range 0 ~ 359.9°
• Test frequency: 40–70 Hz single frequency settable; automatic double frequency conversion around 50 Hz and 60 Hz configurable
• Frequency accuracy: ±0.01 Hz
• Measuring time: approx. 40 s (method dependent)
• Input power: 180 V ~ 270 VAC, 50 Hz ±1% (mains or generator)
• Computer interface: RS232 standard; U‑disk socket for automatic storage
• Printer: built‑in thermal micro printer
• Operating temperature: -10 °C ~ 50 °C
• Relative humidity: <90%
• Dimensions: 500 mm × 377 mm × 330 mm
• Weight: 28 kg