Precision Toroidal Current Transformers TORO-BOX-60X60L-4M
Torotrans is an ISO 9001:2015 certified manufacturer, supplier, and global exporter of high-precision TORO-BOX-60X60L-4M Toroidal Current Transformers based in Pune, Maharashtra, India. Engineered specifically for low-tension (LT) electrical measuring instruments and automated protection devices, this model delivers exceptional current ratio accuracy, thermal stability, and low phase angle error required by switchgear manufacturers and panel builders worldwide.
Mechanical Dimensions (mm)
TORO-BOX-60X60L-4M Unit
Electrical Schematic
Technical Specifications
Full electrical, thermal, and mechanical parameters engineered to comply with international IEC / IS metering standards.
| Primary Current Range | 50 Amp – 100 Amp |
|---|---|
| Secondary Current Output | 0.1 Amp (100mA secondary output) |
| Rated Burden / VA Rating | 0.5 VA |
| Accuracy Class | Class 1.0 (Precision metering standard) |
| Rated Frequency | 50 Hz / 60 Hz |
| Secondary Voltage Output | 4.95 Volt – 5.05 Volt @ 50 Hz |
| Dielectric High Voltage Test | 2.0 kV AC between Primary and Secondary windings |
| Winding Thermal Class | Class F (+155°C) copper wire winding |
| Insulation Class | Class B (+130°C insulation system) |
| Operating Temperature Range | -15°C to +70°C ambient temperature |
| Termination Type | Fixed Nut-Bolt arrangement / U-Type Lugs (S1 - Start, S2 - End) |
| Mounting Type | Base panel mounting via four bottom nut-bolt points |
Key Engineering Features & Applications
The TORO-BOX-60X60L-4M series is designed for continuous operational accuracy in heavy-duty industrial environments. The closed-loop toroidal core minimizes stray magnetic flux emissions, resulting in zero hum and higher measurement accuracy.
- High Precision Current Measurement: Essential for digital panel meters, power quality analyzers, energy management systems, and micro-controller based measuring equipment.
- Protection & Control Devices: Ideal for integration into overload protection relays, phase failure monitors, and automated motor protection circuitry.
- High Current Circuit Compatibility: Provides isolated, proportional secondary signals for safe measurement in high-power industrial distribution circuits.
- Encapsulated Plastic Box Design: Flame-retardant outer housing protects internal core and copper windings from mechanical shock, vibration, humidity, and dust contamination.
- Low Power Consumption: Optimized magnetic core geometry delivers minimal internal core losses and reduced heat generation during continuous loading.
ISO Quality Assurance & Custom OEM Manufacturing
Every TORO-BOX-60X60L-4M transformer manufactured at our 3,500 sq.ft. Pune production unit undergoes rigorous quality testing including turns ratio verification, polarity verification, accuracy class testing, and high-voltage dielectric withstand verification.
International Compliance & Certifications
Manufactured under ISO 9001:2015 standards. Tested in ERDA-accredited facilities for ratio error and protection class compliance. CE & RoHS compliant materials.
Note: Torotrans regularly designs and manufactures non-standard custom current transformers according to client-specific primary/secondary voltage, secondary current, and mounting footprint specifications. Due to continuous product engineering improvements, published dimensions and electrical values are subject to technical confirmation upon order entry.