Auto Tan Delta Bridge
LQATD2840 Automatic Tan Delta Bridge: High-Voltage Insulation Diagnostics
All-in-one 12kV/200mA test system for on-site substation measurements and laboratory-precision dielectric analysis, combining frequency conversion power and digital filtering.
Certifications & Compliance
ISO/IEC 17025: Lab competency
IEC 61010-1: Electrical safety
EN 60247: Insulating liquid tan δ
EMC 2014/30/EU: Noise immunity
IEEE C37.90: Substation equipment standards
Key Features
200% Interference Suppression (2:1 noise-to-signal ratio)
Frequency Conversion (45-65Hz single/dual modes)
Auto-Ranging: 3pF–1.5μF (internal HV) / No limit (external)
Self-Calibrating with precision reference capacitor
Multi-Function: UST/GST/GSTg tests without auxiliary equipment
Technical Specifications
1. Measurement Accuracy
| Parameter | Range | Accuracy |
|---|---|---|
| Capacitance (CX) | 3pF–1.5μF @12kV | ±1% +1pF |
| tan δ / DF | 0–9.99 | ±1% +0.0004 |
| Power Factor (cos φ) | 0–1 | ±1% +0.0004 |
2. High-Voltage Output
Voltage: 0.5–12kV (smooth ramping)
Current: 200mA max (5A with external supply)
Frequency: 45/50/55/60/65Hz (single or dual)
3. System Configuration
Input Impedance: <2Ω (negligible cable capacitance)
Data Storage: 100 test groups
Interfaces: RS-232, thermal printer (128×64 dot matrix)
Power: 95–260V AC (generator-compatible)
Applications
Power transformer insulation aging assessment
Circuit breaker/cable tan δ field testing
Bushing & capacitor factory QC
Generator winding diagnostics (UST/GST modes)
Safety Protections
Output short-circuit protection
Ground fault detection
Overvoltage/overcurrent auto-cutoff
Physical Specs: 46×35×34cm (28kg) | Operating temp: -10°C–50°C | Humidity: <90% non-condensing
