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Protection class CTs that hold their ratio through fault current so relays see a faithful signal.
Made to your specification
Specify the relay, its burden and the required accuracy limit factor and the core will be sized accordingly.
The SA protection series is wound for accuracy limit performance rather than metering precision. The core is sized so the transformer keeps transforming during a fault instead of saturating, which is what allows a relay to discriminate correctly.
Accuracy limit factor and burden are matched to the relay being fed, so specify the relay model along with the ratio when enquiring.
| Product Code | SA-PRO |
|---|---|
| Primary Current | 100A – 10000A |
| Secondary Current | 5A or 1A |
| Accuracy Class | 5P10 / 5P20 |
| Burden | 5.0 – 15 VA |
| Inner Diameter | Window or bar primary |
| Frequency | 50 / 60 Hz |
| Insulation | 720 V, Class B |
| Mounting Type | Busbar or base mounted |
| Application | Overcurrent and earth fault protection |
Values shown are for the standard build. Ratio, burden, accuracy class and aperture can be changed to order.
Request a quote
The product is preselected below. Add the ratio, burden and quantity you need and you will get a quotation with a firm lead time.
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