Model 21l Indoor Current Transformer
Indoor current transformer for protective relaying, metering, and instrumentation; rated 0.72 kV.
Our 21l provides reliable indoor current transformer performance for protective relaying, metering, and instrumentation.
Overview
The Model 21l Indoor Current Transformer is engineered for indoor service in utility, industrial, and commercial electrical distribution installations, targeting protective relaying, metering, and instrumentation. Relaying and metering. Frequency 50-400 Hz Insulation Level 0.72 kV Terminals are brass studs ASA 8-32 with one flatwasher, lockwasher, and regular nut
Constructed with precision-wound cores and robust insulation, the 21l maintains rated accuracy through repeated thermal cycling, mechanical vibration, and environmental exposure typical of indoor installations. Key ratings: 0.72 kV. 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.
Request a Quote for Model 21l Indoor Current Transformer
Product Specifications
- Frequency
- 50–400 Hz
- Insulation BIL
- 0.7 kV
- Weight
- 9.92 lbs
- Mounting
- Indoor
- Application
- Metering, Protection
- Standards
- IEC 44-1
- Window diameter
- 31.7 mm
- Approximate weight
- 4.5 kg
- Terminals
- Brass studs ASA 8-32
- Mounting bracket kit
- 0221B00541
- Multi-ratio option
- Available upon request
- Excitation data
- Available upon request
Specification Table
| Primary A | Secondary A | Ratio (display) |
|---|---|---|
| 50 | 5 | 50:5 |
| 75 | 5 | 75:5 |
| 100 | 5 | 100:5 |
| 150 | 5 | 150:5 |
| 200 | 5 | 200:5 |
| 250 | 5 | 250:5 |
| 300 | 5 | 300:5 |
| 400 | 5 | 400:5 |
| 500 | 5 | 500:5 |
| 600 | 5 | 600:5 |
| 750 | 5 | 750:5 |
| 800 | 5 | 800:5 |
| 1000 | 5 | 1000:5 |
Downloads
Browse Other Transformers
Large Transformer Inventory In Stock.
Need Transformers Fast? Download Our Current Inventory List!