Model 3PT3-60 Indoor Current Transformer
Indoor current transformer for protective relaying, metering, and instrumentation; rated 5.6 kV, 700 VA.
Our 3PT3-60 provides reliable indoor current transformer performance for protective relaying, metering, and instrumentation.
Overview
The Model 3PT3-60 Indoor Current Transformer is engineered for indoor service in utility, industrial, and commercial electrical distribution installations, targeting protective relaying, metering, and instrumentation. It provides accurate current measurement across a wide operating range while maintaining stable long-term calibration.
Constructed with precision-wound cores and robust insulation, the 3PT3-60 maintains rated accuracy through repeated thermal cycling, mechanical vibration, and environmental exposure typical of indoor installations. Key ratings: 5.6 kV, 700 VA. Design conforms to IEEE C57.13 (where applicable) for instrument-transformer accuracy and dielectric testing.
Typical deployments include substation switchgear, generator and transformer protection, revenue metering, feeder and motor protection, and control-room instrumentation. Refer to the attached data sheet for complete ratio, burden, accuracy class, and dimensional details; contact our engineering team for custom ratings, extended range, or non-standard configurations.
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Product Specifications
- Frequency
- 60 Hz
- Insulation BIL
- 60 kV
- Weight
- 38 lbs
- Mounting
- Indoor
- Application
- Metering
- Accuracy Class
- 0.3 WX, 0.6 M, 1.2 Y at 100% rated voltage with 120 V based ANSI burden
- Thermal Rating (per phase)
- 350 VA per phase at 30 degC amb; 225 VA per phase at 55 degC amb
- Maximum System Voltage
- 5.6 kV
- Primary Terminals
- No. 10-32 brass screws with one flatwasher and lockwasher
Specification Table
| Primary V | Secondary V | Ratio (display) | Thermal Rating Factor @ 30°C | Thermal Rating Factor @ 55°C | Fuse Rating |
|---|---|---|---|---|---|
| 2400 | 120 | 20:1 | 700 | 450 | 1.0E |
| 2400 | 120 | 20:1 | 700 | 450 | 1.0E |
| 3300 | 120 | 30:1 | 500 | 350 | 1.0E |
| 3300 | 120 | 30:1 | 500 | 350 | 1.0E |
| 4200 | 120 | 35:1 | 700 | 450 | 0.5E |
| 4200 | 120 | 35:1 | 700 | 450 | 0.5E |
| 4800 | 120 | 40:1 | 700 | 450 | 0.5E |
| 4800 | 120 | 40:1 | 700 | 450 | 0.5E |
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