1 / 5Medium-Voltage Components
Instrument Transformers (Current & Voltage)
Cast-resin current and voltage instrument transformers — cable-type (toroidal) and block/support-type — for metering and protection up to 36 kV.
At a glance
- Types
- Cable-type (toroidal) CT, Block-type CT, Block-type VT
- Test Voltages
- 12/28 kV; 50/125 kV
- Rated Frequency
- 50 / 60 Hz
- Max. Rated Primary Current
- 2500 A (B12) / 3000 A (B24)
Products
Overview
Armtek instrument transformers are cast-resin current and voltage transformers for metering and protection up to 36 kV. The range comprises three families:
- Toroidal / Cable-Type Current Transformers — wound around the cable for compact metering and protection
- Block-Type (support) Current Transformers — robust primary current measurement
- Block-Type Voltage Transformers — accurate voltage measurement and protection
Models ARCT-B12 (12 kV) and ARCT-B24 (24 kV) cover primary currents up to 2500–3000 A with 1 A or 5 A secondaries, in accordance with IEC 61869-2 and IEC 61869-3.
Products
Technical Specifications
Technical data8
- Types
- Cable-type (toroidal) CT, Block-type CT, Block-type VT
- Test Voltages
- 12/28 kV; 50/125 kV
- Rated Frequency
- 50 / 60 Hz
- Max. Rated Primary Current
- 2500 A (B12) / 3000 A (B24)
- Max. Operating Voltage (Um)
- 12 kV (ARCT-B12) / 24 kV (ARCT-B24)
- Rated Dynamic Current
- max 120 kA (2.5 × Ith)
- Rated Secondary Current
- 1 or 5 A
- Rated Short-Time Thermal Current
- max 60 kA (1000 × In)
Standards & Compliance
- IEC 61869-2
- IEC 61869-3
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