Model CTM-0-1 Indoor Metering Current Transformer
Indoor metering current transformer for revenue metering and precision current sensing; rated 0.6 kV, 10 kV BIL, 50-400 A.
Our CTM-0-1 provides reliable indoor metering current transformer performance for revenue metering and precision current sensing.
Overview
The Model CTM-0-1 Indoor Metering Current Transformer is engineered for indoor service in utility, industrial, and commercial electrical distribution installations, targeting revenue metering and precision current sensing. Designed for indoor service. Suitable for operating meters, relays and control devices. Weight (approximate)
Constructed with precision-wound cores and robust insulation, the CTM-0-1 maintains rated accuracy through repeated thermal cycling, mechanical vibration, and environmental exposure typical of indoor installations. Key ratings: 0.6 kV, 10 kV BIL, 50-400 A. 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
- 10 kV
- Weight
- 7 lbs
- Mounting
- Indoor
- Application
- Metering
- IEEE Accuracy Class
- B0.1 to B0.9
- Insulation Voltage Class
- 0.6 kV; BIL 10 kV full wave
- Construction
- Core and coil encapsulated in polyurethane resin within a molded case; grain-oriented silicon steel core; heavy enameled copper secondary winding evenly distributed for accuracy
- Secondary Terminals
- Tin plated brass, compression type, with interlocked shorting device and clear plastic sealable terminal cover
- Primary Configuration
- Wound primary, single bar, 2 wire, tin plated copper primary bars
- Reference Outline Drawings
- 50-400 A: 0121C42881; 500-1,200 A: 0121C42882
- Burden — Value
- 0.3
Specification Table
| Primary A | Secondary A | Ratio (display) | Thermal Rating Factor @ 30°C |
|---|---|---|---|
| 5 | 5 | 5:5 | 1.5 |
| 10 | 5 | 10:5 | 1.5 |
| 15 | 5 | 15:5 | 1.5 |
| 20 | 5 | 20:5 | 1.5 |
| 25 | 5 | 25:5 | 1.5 |
| 30 | 5 | 30:5 | 1.5 |
| 40 | 5 | 40:5 | 1.5 |
| 50 | 5 | 50:5 | 1.5 |
| 60 | 5 | 60:5 | 1.5 |
| 75 | 5 | 75:5 | 1.5 |
| 100 | 5 | 100:5 | 1.5 |
| 150 | 5 | 150:5 | 1.5 |
| 200 | 5 | 200:5 | 1.5 |
| 250 | 5 | 250:5 | 1.5 |
| 300 | 5 | 300:5 | 1.5 |
| 400 | 5 | 400:5 | 1.5 |
| 500 | 5 | 500:5 | 1.5 |
| 600 | 5 | 600:5 | 1.5 |
| 800 | 5 | 800:5 | 1.5 |
| 1000 | 5 | 1000:5 | 1.2 |
| 1200 | 5 | 1200:5 | 1 |
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