High-Precision TORO-BOX-75X75L-4M Current Transformer
Torotrans is an ISO 9001 certified OEM manufacturer, bulk supplier, and global exporter of high-accuracy Toroidal Current Transformers (Model: TORO-BOX-75X75L-4M) headquartered in Pune, Maharashtra, India. Engineered specifically for demanding global B2B procurement standards, the TORO-BOX-75X75L-4M series provides accurate low-tension current measurement and reliable protection across high-power industrial control panels, switchgear, and energy management systems.
Product Views & Technical Drawings
Front Perspective View
Top Terminal Configuration
Encapsulated Housing
Electrical Wiring Schematic
Dimensional Drawing (mm)
Technical Specifications
| Electrical & Mechanical Parameter | : | Manufacturer Specification Standard |
|---|---|---|
| Product Model Code | : | TORO-BOX-75X75L-4M |
| Primary Current Rating | : | 50 Amp to 600 Amp (Full range available) |
| Secondary Output Current | : | 0.1 Amp or 0.2 Amp (Custom ratings on request) |
| Burden Rating (VA) | : | 1 VA |
| Accuracy Class | : | Class 1.0 (IEC / IS Standards Compliant) |
| Operating Frequency | : | 50 Hz / 60 Hz |
| Secondary Output Voltage | : | 9.90 V – 10.10 V @ 100 Ω |
| High Voltage (H.V.) Test Isolation | : | 2.0 KV AC between Primary and Secondary for 1 min |
| Winding Thermal Class | : | Class F (Up to 155°C high thermal performance) |
| System Insulation Rating | : | Class B Insulation Standard |
| Operating Temperature Range | : | -15°C to +70°C |
| Terminal Connection Type | : | Fixed Nut-Bolt / U-Type Lug Terminals (S1: Start, S2: End) |
| Mounting Type | : | Base Mounting Plate / Enclosure Mounting (As per drawing) |
Key Features & Engineering Advantages
- Superior Toroidal Core Efficiency: Premium grain-oriented silicon steel core reduces magnetic flux leakage and core loss.
- High Measurement Accuracy: Class 1 precision output ensures reliable current sensing for digital metering and protection relays.
- Robust Encapsulated Casing: Durable outer box protective housing provides excellent protection against moisture, dust, and environmental impact.
- Zero Acoustic Hum: Continuous tape-wound toroidal construction completely eliminates audible vibration and mechanical chatter.
- Flexible Secondary Output: Standardized terminals (Fixed Nut-Bolt or U-Lug) enable fast, secure field installation.
Primary Target Applications
- Electrical Measuring Instruments: Ideal for ammeters, digital power meters, and energy monitoring panels.
- Protective Relay Systems: Essential sensing component for overload protection and earth fault sensing circuits.
- High-Power Industrial Switchgear: Designed for low voltage (LV) control gear and distribution cabinets.
- OEM Equipment Integration: Compact physical footprint suitable for space-critical electrical machinery enclosures.
- Custom OEM Configurations: Tailored ratios, burdens, and secondary voltage specs manufactured to order.
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