Instrument Transformers
ARCT-B — Block Type (Support) Current Transformer
Cast-resin support-type current transformer for medium-voltage cells — measurement, metering and relay protection.
12 / 24 / 36 kVup to 3,000 A60 kA
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ARCT-B12/B24/B36 block-type current transformers are installed in switchgear cells and additionally serve as a support insulator. 1–3 secondary windings per phase; accuracy class and burden per specification.
Technical Specifications
| Parameter | ARCT-B12 | ARCT-B24 | ARCT-B36 |
|---|---|---|---|
| Maximum operating voltage (Um) | 12 kV | 24 kV | 36 kV |
| Test voltages | 28 / 75 kV | 50 / 125 kV | 70 / 170 kV |
| Maximum rated primary current | 2,500 A | 3,000 A | 3,000 A |
| Rated secondary current | 1 or 5 A | 1 or 5 A | 1 or 5 A |
| Short-time thermal current | Up to 60 kA (1,000 × In) | ||
| Rated dynamic current | Up to 120 kA (2.5 × Ith) | ||
| Weight | 20–35 kg | 33–50 kg | 45–60 kg |
