Industrial Grade Low Tension Toroidal Current Transformer
Torotrans manufactures high-precision TORO-BOX-OMEGA-70 Toroidal Current Transformers designed specifically for electrical energy metering, panel boards, switchgear units, and protective relaying circuits. Built with high-permeability grain-oriented silicon steel cores, the OMEGA-70 series provides exceptional accuracy, minimal phase angle displacement, and reliable long-term thermal performance under heavy continuous loading.
TORO-BOX-OMEGA-70 Main Unit
Encapsulated Construction
Dimensional Diagram (mm)
Schematic Diagram
Technical Specifications
| Parameter | : | Specification Range / Rating |
|---|---|---|
| Primary Current Range | : | 50 Amp to 150 Amp (AC Continuous) |
| Secondary Current Rating | : | 1 Amp or 5 Amp (Custom secondary available) |
| Burden / VA Rating | : | 1.0 VA to 5.0 VA |
| Accuracy Class | : | Class 0.2, Class 0.5, or Class 1.0 (As per client request / IEC standards) |
| Operating Frequency | : | 50 Hz / 60 Hz |
| High Voltage (H.V.) Test | : | 2.0 kV AC for 1 minute (Primary to Secondary) |
| Winding Insulation Class | : | Class F (155°C Copper Winding Wire) |
| Overall Insulation Class | : | Class B (130°C Thermal Rating) |
| Operating Temperature | : | -15°C to +70°C ambient range |
| Termination Type | : | Color-coded Flying Leads (Red: Start, Black: End) |
| Mounting Style | : | Heavy-duty Base Plate mounting with flying lead connections |
Key Engineering Features
- Zero Flux Leakage Core: Circular toroidal geometry virtually eliminates magnetic flux leakage and ratio error.
- High Overload Capacity: Designed to handle peak surge currents during electrical fault conditions without core saturation.
- Flame-Retardant Encapsulation: Tough protective housing engineered for ambient insulation and mechanical shock resistance.
- Secondary Turn Compensation: Precision winding technology compensates turn ratios to guarantee exact metering accuracy.
Industrial Applications
- Power Distribution Switchgear: Installed in Low Tension (LT) panels for continuous current monitoring.
- Energy & Power Meters: Serves as an input transducer for digital power meters, multi-function meters, and ammeters.
- Motor Control Centers (MCC): Used for overcurrent protection relays and motor overload detection.
- Renewable Energy Systems: Suitable for solar inverter monitoring units and industrial UPS systems.
Custom OEM Engineering Options
Torotrans specializes in custom ratio toroidal current transformers tailored to exact technical drawings and burden specifications. Additional lead lengths, custom mounting brackets, and specialized resin-cast or tape-wound insulation finishes can be engineered upon request for international OEM buyers.