Precision Toroidal Current Transformer (50A – 600A)
Torotrans is an established ISO 9001 certified manufacturer, supplier, and exporter of high-accuracy TORO-BOX-75X75-2M Toroidal Current Transformers. Designed for heavy-duty low-tension (LT) measuring instruments and protective equipment, this model features a compact box-type housing, high dielectric strength, and minimal ratio phase error. Manufactured in Pune, India, Torotrans products adhere to strict international quality benchmarks for global OEM electrical switchgear manufacturers.
Outline Dimensions (mm)
TORO-BOX-75X75-2M Unit
Wiring Schematic
Technical Specifications
| Primary Current Range | 50 Amp to 600 Amp |
|---|---|
| Secondary Current Output | 0.1 Amp or 0.2 Amp (Custom ratings available) |
| VA Rating | 1.0 VA |
| Accuracy Class | Class 1.0 (Precision metering standard) |
| Operating Frequency | 50 Hz / 60 Hz |
| Secondary Voltage Output | 9.90 V – 10.10 V @ 100% rated primary current |
| High Voltage Withstand Test | 2.0 kV AC between Primary and Secondary (1 min) |
| Winding Insulation Class | Class F (Up to 155°C thermal rating) |
| Body Insulation Class | Class B |
| Operating Temperature Range | -15°C to +70°C |
| Termination Type | Fixed Nut-Bolt / U-Type Lugs (S1 - Start, S2 - End) |
| Mounting Construction | Box Type / Base Plate Mount (75mm x 75mm Footprint) |
Key Features & Technical Advantages
- High Core Efficiency: Seamless grain-oriented silicon steel toroidal core ensures ultra-low stray flux leakage and high measuring linearity.
- Precision Metering Accuracy: Engineered to Class 1 precision, delivering predictable performance for electrical measuring instruments and protective relays.
- Robust Mechanical Insulation: Encapsulated in durable flame-retardant housing to withstand continuous mechanical and thermal stresses in heavy industrial environments.
- Low Temperature Rise: Optimized winding geometry guarantees minimum operational temperature elevation, maximizing operating lifespans inside enclosed switchboards.
- Compact Footprint: Standardized 75x75mm dimensions enable easy integration into tight electrical control panels, motor control centers (MCC), and switchgear units.
Industrial Applications
- Low Voltage (LV) and Low Tension (LT) power distribution panels.
- Industrial energy meters, digital panel meters, and current monitoring relays.
- Motor Control Centers (MCC) and Power Control Centers (PCC).
- Overload protection circuits and phase imbalance protection devices.
- OEM electrical switchboard assembly and substations.
E-E-A-T Quality Assurance & Export Compliance
With over 30 years of transformer engineering expertise since 1994, Torotrans enforces 100% routine quality testing on every batch. Testing includes excitation current evaluation, turns ratio verification, phase angle error testing, and high-voltage dielectric withstand checks.
Note: Non-standard primary/secondary current ratios, modified terminal leads, and specialized mounting brackets can be manufactured upon request to meet technical procurement requirements.
Certified Quality Standards
CE Compliant | RoHS Certified | ISO 9001 Manufacturing | ERDA Type Tested
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