Model 81 Current Transformer
Introducing the Model 81 Current Transformer, a high-quality measurement device, distributed by Spectrum Industries. Designed to deliver precise current measurement capabilities, this transformer is an essential tool for electrical professionals seeking reliable performance in various industrial and commercial applications.
Overview
Introducing the Model 81 Current Transformer, a high-quality measurement device, distributed by Spectrum Industries. Designed to deliver precise current measurement capabilities, this transformer is an essential tool for electrical professionals seeking reliable performance in various industrial and commercial applications.
The Model 81 Current Transformer is engineered with durability and accuracy in mind, ensuring consistent results even in demanding environments. Its robust construction and advanced design make it suitable for monitoring electrical systems, performing load analysis, and facilitating maintenance tasks. Whether used in power distribution, automation, or testing setups, this transformer provides the dependable performance that professionals rely on for critical measurements.
a global leader in electrical and electronic manufacturing, the Model 81 benefits from decades of innovation and expertise in the field. Spectrum Industries, a trusted distributor, ensures that this product reaches customers with the highest standards of quality and support. The transformer’s compact form factor and straightforward installation make it an excellent choice for both new installations and upgrades to existing systems.
Overall, the Model 81 Current Transformer by, available through Spectrum Industries, offers a combination of precision, durability, and ease of use. It is an ideal solution for those seeking dependable current measurement in a variety of electrical applications.
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Product Specifications
- Frequency
- 50–400 Hz
- Insulation BIL
- 10 kV
- Weight
- 18 lbs
- Application
- Metering
- Standards
- UL, ANSI/IEEE C57.13, IEC 44-1
- System voltage
- 0.6 kV
- Continuous thermal rating factor
- 1.33 @ 30 C / 1.0 @ 55 C
- Primary current range
- Up to 50 A
- Terminal hardware (up to 25:5)
- No. 8-32 brass studs
- Terminal hardware (higher ratios)
- 1/4-20 brass studs
- Mounting bracket kit
- 0221B00259
- Model 81X application
- Auxiliary secondary transformer
- Model 81X hipot test
- 2500 V, 60 Hz
- Burden — Value
- 200
- Burden — Condition
- typical
- Overall Accuracy — Accuracy
- 0.3
- Overall Accuracy — Condition
- ANSI metering class 0.3 through B1.8 at 60 Hz (Model 81)
- Dielectric Test — Voltage
- 2.5
- Dielectric Test — Duration
- 60
Specification Table
| Primary A | Secondary A | Ratio (display) | Relay Class | ANSI Metering Class | Thermal Rating Factor @ 30°C | Thermal Rating Factor @ 55°C |
|---|---|---|---|---|---|---|
| 1 | 5 | 1:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 2.5 | 5 | 2.5:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 5 | 5 | 5:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 7.5 | 5 | 7.5:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 10 | 5 | 10:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 15 | 5 | 15:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 20 | 5 | 20:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 25 | 5 | 25:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 30 | 5 | 30:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 40 | 5 | 40:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 50 | 5 | 50:5 | C50 | 0.3B1.8 | 1.33 | 1 |
| 5 | 0.1 | 5:0.1 | — | — | — | — |
| 5 | 0.2 | 5:0.2 | — | — | — | — |
| 5 | 0.25 | 5:0.25 | — | — | — | — |
| 5 | 0.5 | 5:0.5 | — | — | — | — |
| 5 | 0.63 | 5:0.625 | — | — | — | — |
| 5 | 1 | 5:1 | — | — | — | — |
| 5 | 1.25 | 5:1.25 | — | — | — | — |
| 5 | 1.67 | 5:1.667 | — | — | — | — |
| 5 | 2 | 5:2 | — | — | — | — |
| 5 | 2.4 | 5:2.395 | — | — | — | — |
| 5 | 2.5 | 5:2.5 | — | — | — | — |
| 5 | 2.89 | 5:2.89 | — | — | — | — |
| 5 | 3 | 5:3 | — | — | — | — |
| 5 | 3.33 | 5:3.33 | — | — | — | — |
| 5 | 3.75 | 5:3.75 | — | — | — | — |
| 5 | 4 | 5:4 | — | — | — | — |
| 5 | 5 | 5:5 | — | — | — | — |
| 5 | 5.33 | 5:5.33 | — | — | — | — |
| 5 | 6.25 | 5:6.25 | — | — | — | — |
| 5 | 7.5 | 5:7.5 | — | — | — | — |
| 5 | 8 | 5:8 | — | — | — | — |
| 5 | 10 | 5:10 | — | — | — | — |
| 5 | 12.5 | 5:12.5 | — | — | — | — |
| 5 | 15 | 5:15 | — | — | — | — |
| 1.5 | 5 | 1.5:5 | — | — | — | — |
| 1.67 | 5 | 1.667:5 | — | — | — | — |
| 2.5 | 5 | 2.5:5 | — | — | — | — |
| 2.88 | 5 | 2.875:5 | — | — | — | — |
| 7.5 | 5 | 7.5:5 | — | — | — | — |
| — | 5 | 10:5:5 | — | — | — | — |
| 0.5 | 1 | 0.5:1 | — | — | — | — |
| 0.92 | 1 | 0.923:1 | — | — | — | — |
| 0.4 | 10 | 0.4:10 | — | — | — | — |
Specification Table
| Ratio | Number of secondaries totalized | Output terminals | Hipot | Circuit max |
|---|---|---|---|---|
| 5+5:5 | 2 | X1-X2 | 2500 V, 60 Hz | 600 V |
| 5+5+5+5:5 | 4 | X1-X2 | 2500 V, 60 Hz | 600 V |
Auxiliary summing transformer that totalizes two 5 A secondaries. Up to five secondaries may be totalized; equal or unequal line CTs can be summed (specify line CT ratios when unequal).
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