MSVLF-II VLF Hipot Tester with Tan Delta & PD Testing 30kV-90kV Cable Diagnostic System |
MSVLF-II VLF Hipot Tester with Tan Delta & PD Testing 30kV-90kV Cable Diagnostic System |
Product Description
Integrated Tan Delta & Partial Discharge Testing System
The Ultimate All-in-One Cable Diagnostic Solution
The MSVLF-II Series is a revolutionary Very Low Frequency (VLF) testing system that combines AC/DC withstand voltage testing, Tan Delta (Dielectric Loss) measurement, and Partial Discharge (PD) detection** into a single, portable instrument. Designed for 30kV to 90kV applications, this system is ideal for preventive maintenance, handover testing, and insulation condition assessment of power cables up to 35kV.
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Why Choose the MSVLF-II?
Traditional VLF testers only offer withstand voltage capability. The MSVLF-II goes far beyond — it provides comprehensive **cable insulation diagnostics** in one portable unit:
Feature
Integrated Tan Delta Measures dielectric loss, capacitance, and insulation resistance simultaneously — detects cable aging and water tree degradation
Built-in Partial Discharge: Identifies partial discharge activity during voltage withstand testing — catches defects before they cause failure |
DC Withstand Option Performs DC leakage current testing for additional insulation assessment
Single-Unit Design (≤60kV): No separate booster — truly portable and field-friendly |
Series Connection (>60kV)： Lightweight modular design for 70kV-90kV ratings — easy to transport and set up |
Touch Screen Interface：7-inch color display with intuitive operation and real-time waveform display
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Key Applications
– Power Cable Testing: XLPE and rubber-insulated cables up to 35kV
– Handover Testing: New cable installation verification
– Preventive Maintenance: Regular insulation condition monitoring
– Fault Diagnosis: Locate partial discharge and insulation degradation
– Generator & Motor Testing: Stator winding insulation assessment
Comprehensive Testing Capabilities
1. VLF AC Withstand Voltage Test
– Output: 1kV to rated voltage (30kV – 90kV)
– Frequency: 0.1Hz – 0.01Hz (auto/manual)
– Meets IEC 60060-1, IEC 60060-2, and DL/T 849.4-2004 standards
– Fully automated step-up, step-down, measurement, and protection
2. Tan Delta (Dielectric Loss) Test
– Measures: **tgδ (dielectric loss)**, **capacitance (C)**, **insulation resistance (R)**
– Test points: 0.5U₀, 1.0U₀, 1.5U₀ (per IEC/China Southern Power Grid standards)
– Automatic data processing with cable insulation evaluation (Normal / Attention / Abnormal)
– Complies with: T/CEC-243-2019, Q/CSG1205027-2020, IEEE 400.2
3. Partial Discharge (PD) Test
– Detection range: 1pc – 5000pc
– Resolution: 1pc | Accuracy: ±3%
– Sampling speed: 200MHz | 12-bit sampling
– Displays: Instantaneous PD, peak value, discharge starting voltage, extinguishing voltage
– Automated PD evaluation: <10pc (Pass) / 10-100pc (Slight) / >100pc (Fail)
4. DC Withstand Voltage Test (Optional)
– Output: 30kV – 90kV
– Leakage current range: 0 – 2000μA
– Resolution: 1μA | Accuracy: ±3%
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Technical Specifications
| Parameter | Specification |
| AC Rated Output Voltage | 30kV – 90kV (model dependent) |
| AC Output Frequency | 0.1Hz – 0.01Hz (auto variable) |
| AC Voltage Accuracy | ≤3% |
| AC Voltage Resolution | 0.1kV |
| AC Current Accuracy | ±3% |
| AC Current Resolution | 0.1mA |
| Waveform Distortion | ≤3% |
| Operating Temperature | -10°C to +40°C |
| Humidity | ≤85% RH |
| Power Supply | 220V ±5%, 50/60Hz (110V optional) |
Tan Delta (Dielectric Loss) Specifications
| Parameter | Specification |
| Test Voltage Range | 1kV – Rated Value |
| Test Frequency | 0.1Hz – 0.01Hz |
| TD Measurement Range | 0.01×10⁻³ – 655.35×10⁻³ |
| TD Resolution | ≤1×10⁻⁵ |
| TD Accuracy | 1% |
| Capacitance Range | 0.001μF – 10μF |
| Capacitance Resolution | 0.001μF |
| Insulation Resistance Range | 1MΩ – 65535MΩ |
Partial Discharge (PD) Specifications
| Parameter | Specification |
| Test Voltage Range | 1kV – Rated Value |
| Test Frequency | 0.1Hz – 0.01Hz |
| TD Measurement Range | 0.01×10⁻³ – 655.35×10⁻³ |
| TD Resolution | ≤1×10⁻⁵ |
| TD Accuracy | 1% |
| Capacitance Range | 0.001μF – 10μF |
| Capacitance Resolution | 0.001μF |
| Insulation Resistance Range | 1MΩ – 65535MΩ |
| PD Detection Range | 1pc – 5000pc |
| PD Resolution | 1pc |
| PD Accuracy | ±3% |
| Capacitance Range | 0.001μF – 10μF |
| Sampling Speed | 200MHz |
| Sampling Bits | 12 bits |
Model Selection Table
| Model | Output Voltage | Current | Fuse | Structure | Weight |
| MSVLF‑II‑30 | 1～30 kV AC/DC | 20mA | 10A | Integrated | 25kg |
| MSVLF‑II‑40 | 1～40 kV AC/DC | 20mA | 15A | Integrated | 30kg |
| MSVLF‑II‑50 | 1～50 kV AC/DC | 20mA | 20A | Integrated | 40kg |
| MSVLF‑II‑60 | 1～60 kV AC/DC | 20mA | 20A | Integrated | 45kg |
| MSVLF‑II‑70/80/90 | 1～90 kV AC/DC | 20mA | 20A | Series (2 units) | Controller + Booster |
Load capacity: ≤6μF (30/40kV models) | ≤5μF (50kV model)
Multi-frequency support: 0.1Hz / 0.05Hz / 0.02Hz / 0.01Hz
Intelligent Protection Features
-Automatic overvoltage & overcurrent protection** — no manual setting required
– Fast response — protection action <20ms
– Voltage/current sudden change detection** — captures discharge events
– Automatic discharge— safely discharges test object after shutdown
– High-voltage cable — 150kV rated output cable for safety
Standards Compliance
– IEC 60060-1:2010 (High-voltage test techniques)
– IEC 60060-2:2010 (Measurement systems)
– IEC 61326-1:2013 (EMC requirements)
– IEC 62061:2012 (Safety of machinery)
– IEC 61010-1:2010 (Safety requirements for electrical equipment)
– DL/T 849.4-2004 (China VLF standard)
– T/CEC-243-2019 (Tan Delta test standard)
– Q/CSG1205027-2020 (China Southern Power Grid)
– IEEE 400.2 (VLF cable testing guide)
