Dry Type
HFRS 135kV/135kVA Dry Type Resonant Test System: Three-Stage Modular Solution
Modular system consisting of three 45kV/45kVA units that can be series-connected for 135kV testing or used independently for lower voltage applications.
System Configuration
| Configuration | Voltage | Power | Inductance | Current | Weight |
|---|---|---|---|---|---|
| Single Module | 45kV | 45kVA | 132H | 1A | 50kg |
| Three Modules (Series) | 135kV | 135kVA | 396H | 1A | 165kg |
Key Technical Parameters
Frequency Range: 30-300Hz operational bandwidth
Continuous Operation: 60 minutes at rated power
Thermal Performance:
Maximum temperature rise: ≤65K after 60 minutes operation
Epoxy tube surface temperature: ≤40K
Connection Flexibility: Series or parallel configurations
Cooling Method: Natural air cooling (dry type)
Design Features
Modular Construction
Three identical 45kV modules
Precision-matched components (±2% tolerance)
Individual weight: 50kg per module
Dry Type Advantages
Epoxy tube insulation system
No oil maintenance requirements
Environmentally friendly operation
Reduced fire hazard
Field Deployment
Integrated lifting points on each module
Stackable design for transport
Configuration-specific nameplates
Performance Comparison
| Feature | HFRS Dry Type | Conventional Oil Type |
|---|---|---|
| Maintenance | Minimal (dry type) | Regular oil testing |
| Weight | 165kg (3 modules) | 300kg+ typical |
| Environmental Impact | No oil disposal | Oil handling required |
Typical Applications
Medium Voltage Cable Testing
135kV cable withstand testing
Partial discharge measurement
Transformer Diagnostics
Winding deformation detection
Frequency response analysis
Research Laboratory Use
Dielectric material evaluation
Component testing
Operation & Safety
Installation Requirements
Minimum 2m clearance around equipment
Adequate ventilation for cooling
Level mounting surface
Maintenance Schedule
Annual visual inspection of epoxy surfaces
Connection check before each use
Five-year comprehensive electrical test
