Series 20,

60/80mm Busbars
Series 20 Current Transformers


A range of compact low cost moulded case current transformers suitable for primary currents from 400A to 2000A with built in sealable terminal covers.


For transforming various primary currents into 5A or 1A standard secondary using 60x30mm or 80x10mm busbars or cables up to 60mm diameter



  • Built in sealable terminal covers
  • Mounting feet supplied
  • Narrow width – 100mm
  • Wide range of primary current

Technical Specification

  • Conforms to IEC185, BS 7626, BSEN 60044-1, IEC 60044-1 and IEC 61869-2.
  • Rated system voltage 0.72/3kV.
  • Ambient temperature range -5°C to +50°C.
  • Continuous current 1.2 x rated current.

Range 5A Secondary

Class 3 Class 1 Class 0.5
VA 2.5 5 10 15 2.5 5 10 15 2.5 5 10 15
400A A1 A2 A3 A5 A6 A7 A9 A10
500A B1 B2 B3 B5 B6 B7 B9 B10
600A C1 C2 C3 C4 C5 C6 C7 C9 C10
800A D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11
1000A E1 E2 E3 E5 E6 E7 E8 E9 E10 E11
1200A F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11
1250A G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11
1500A H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11
1600A J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11
2000A K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11
1A secondary available by request.
Class 0.2S also available by request.Order Example: A 20 series moulded case current transformer, with 5A
secondary and 2000A primary 5VA class 1 is part number 20-5-K6