Series 163,
20/30mm busbars


A range of compact moulded case current transformers suitable for primary currents from 50A to 600A with built in terminal covers.


For transforming various primary currents into 1A or 5A secondary using 20x10mm, 30x10mm or 30x15mm busbars or 24mm diameter cables.



  • Built in sealable terminal covers.
  • Mounting feet and busbar screws supplied.
  • Narrow width – 60mm.
  • Din rail clip supplied with CT163 only.


Technical Specifications

  • Conforms to IEC185, BS 7626, BSEN 60044-1, IEC 60044-1, BSEN 61869-2 and IEC 61892-2.
  • Rated system voltage 0.72/3kV.
  • Ambient temperature range -5°C to +50°C.
  • Continuous current, 1.2 x rated current..


 Range (Type 163) 5a Secondry

  Class 3 class 1 Class 0.5
VA 2.5 5 2.5 5 2.5 5
100A A1 A4
125A B1 B4
150A C1 C4
200A D1 D2 D4 D5 D7
250A E1 E2 E4 E5 E7 E8
300A F1 F2 F4 F5 F7 F8


Range (Type 163D) 5a Secondry

  Class 1 Class 0.5 Class 0.55 Class 0.2 Class 0.25
VA 2.5 5 10 2.5 5 10 1.5 2.5 5 1.5 2.5 5 1.5 2.5 5
50A A1
60A B1
80A C1
100A D1 D2 D4 D7 D10 D13
150A E1 E2 E3 E4 E5 E6 E7 E8 E9 E10 E11 E12 E13 E14 E15
200A F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15
250A G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 G13 G14 G15
300A H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15
400A J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 J15
500A K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 KK12 K13 K14 K15
600A L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15

1A secondary available by request.
Order Example:A moulded case current transformer type 163D, with 5A secondary and 100A primary 5VA class 1 is part number 163D-5-D2


Dimensions (mm)