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Current Transformers

Hoyt carries a full line of solid core instrument transformers, relay class transformers, and split core transformers. Most products are UL Recognized and CSA Approved. Solid core instrument transformers under the MagnaCore brand are stocked in common ranges.

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  • 1SP Series Split Core Current Transformers

    1SP Series Split Core Current Transformers

    100 to 400 Amps; 2" x 0.084" Window; Conforms to UL 1244, ANSI C57.13 and applicable IEC standards; Can be split apart and reassembled onto the primary conductor without interrupting service
  • 3SP Series Split Core Transformers

    3SP Series Split Core Transformers

    100 to 1200 Amps; 2.19" x 3.25" Window; Conform to UL 1244, ANSI C57.13 and applicable IEC standards; Can be split apart and reassembled onto the primary conductor without interrupting service
  • 5SP Series Split Core Transformers

    5SP Series Split Core Transformers

    300 to 2000 Amps; 2.88" x 4.25" Window; Conforms to UL 1244, ANSI C57.13 and applicable IEC standards; Can be split apart and reassembled onto the primary conductor without interrupting service
  • 781MR Series Current Transformer

    781MR Series Current Transformer

    100 Amps to 4000 Amps; 6.5" Window; Available in C100 or C200 Relay Class; Secondary terminals are No. 10-32 brass screws with mounting hardware
  • BZCT Circular Series Toroids

    BZCT Circular Series Toroids

    35MM to 210MM; 1" to 8" Diameters; Precision toroids that provide a 1/1000 ratio and are used in conjunction with Type A Earth Leakage Relays (ELRM44V) to detect leakage current; Surface mount with four fixed slots; Maximum continuous current of 1kA and rated for 720VAC
  • Magna-Core 2RL Series Current Transformers

    Magna-Core 2RL Series Current Transformers

    50 to 400 amps; 1.05" Diameter Window; Instrument Class; Features #16 AWG; 24" long leads that are UL 1015 105°C, CSA approved; Compatible with both analog and digital ammeters
  • Magna-Core 2SFT Series Current Transformers

    Magna-Core 2SFT Series Current Transformers

    50 to 400 Amps; 1.13" Diameter Window; Instrument Class; Terminals are brass studs No. 8-32 UNC with one flat washer, lockwasher, and nut; Compatible with both analog and digital ammeters
  • Magna-Core 5RL Series Current Transformers

    Magna-Core 5RL Series Current Transformers

    50 to 1200 Amps; 1.56" Diameter Window; Instrument Class; Compatible with ammeters, wattmeters, and cross current compensation; Features #16 AWG , 24" long leads that are UL 1015 105°C, CSA approved
  • Magna-Core 5SFT Series Current Transformers

    Magna-Core 5SFT Series Current Transformers

    50 to 1200 Amps; 1.56" Diameter Window; Instrument Class; Compatible with ammeters, wattmeters, and cross current compensation; Features #16 AWG , 24" long leads that are UL 1015 105°C, CSA approved
  • Magna-Core 6RL Series Current Transformer

    Magna-Core 6RL Series Current Transformer

    100 Amps to 1500 Amps; 2.06" Window; Instrument Class; Compatible with ammeters, wattmeters, and cross current compensation; 24" flexible leads are UL 1015 105°C, CSA approved #16 AWG wire; Non-standard lengths to be specified
  • Magna-Core 6SFT Series Current Transformers

    Magna-Core 6SFT Series Current Transformers

    100 to 1500 Amps; 2.06" Diameter Window; Instrument Class; Terminals are brass studs No. 8-32 UNC with mounting hardware; Compatible with ammeters, wattmeters, and cross current compensation

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