VT-DGA400 4-Gas Economical DGA Monitor
VT-DGA400 economical 4-gas DGA monitor for distribution transformers — H2, CO, C2H2, C2H4 with PAS technology. Compact DIN-rail mounting.
VT-DGA400 4-Gas Economical DGA Monitor
Cost-effective 4-gas DGA monitoring for distribution transformers and less critical assets.
Overview
The VT-DGA400 brings online DGA monitoring to transformers where the cost of a full 6- or 8-gas monitor is not justified. Measuring the four most diagnostically significant gases (H2, CO, C2H2, C2H4) using PAS technology, it provides early warning of the most common and dangerous fault types: partial discharge, arcing, paper overheating, and high-temperature thermal faults. Compact design enables DIN-rail or wall mounting in existing control cabinets.
Key Features
- 4 key fault gases: H2 (partial discharge), C2H2 (arcing), C2H4 (thermal fault), CO (paper aging)
- Compact form factor: DIN-rail or wall mount, fits in existing cabinets
- PAS technology: No gas cylinders, no consumables, no routine calibration
- 4-20 mA and RS-485 output: Simple integration with existing monitoring systems
- Low total cost of ownership: Minimal installation cost, virtually zero maintenance
Technical Specifications
| Parameter | Specification |
|---|---|
| Measured Gases | |
| Gases | H2, CO, C2H2, C2H4 |
| Measurement technology | Photoacoustic spectroscopy (PAS) |
| Measurement interval | Configurable, 4-24 hours (default 6 hours) |
| Accuracy | |
| Hydrocarbons (C2H2, C2H4) | +/- 15% or 2 ppm |
| H2, CO | +/- 15% or 10 ppm |
| Repeatability | < 5% of reading |
| Communication | |
| Outputs | 4-20 mA (x4, one per gas), RS-485 Modbus RTU |
| Physical | |
| Dimensions | 200 x 150 x 120 mm (H x W x D) |
| Weight | 3.5 kg |
| Mounting | DIN rail or wall bracket (included) |
| Enclosure | IP54 |
| Operating temperature | -25 C to +60 C |
| Power Supply | |
| Input voltage | 100-240 V AC, 50/60 Hz; or 24 V DC |
| Power consumption | < 20 W |
| Certifications | |
| CE, IEC 61010-1, IEC 61326-1, RoHS |