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Class 1 and 0.5 to / 5 A

Moulded case current transformers

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  • Versatility & increased safety

  • Moulded case current transformers are used if high currents are to be recorded and further processed. The line to be measured (conductor rail or wire) is fed through the window opening and forms the primary circuit for the plug-on current transformer. Moulded case current transformers are predominantly used for mounting on conductor rails. Through additional potting it is possible to achieve droplet-tightness, as well as greater shock and vibration resistance with mechanical loading (IEC 68). This is the most common and cost-effective form of current transformer. However, the primary conductor must be disconnected during installation. This form of transformer is therefore most commonly used in new system installations.

  • Main features

  • Increased safety

    • Both halves of the housing overlap rather than butting up against one another
    • Burst-resistant plastic housing made from polyamide
    • Non-combustible per UL 94 VO and self-extinguishing

    Protective caps for primary rail fastening screws

    • Screw-in pins for the primary rail terminals can be insulated by means of protective caps, available as an option
    • Safeguard to prevent accidental contact

    Secondary connection feed

    • Feeding of the secondary connection to the connection terminals through the rectangular opening in the front and rear sides
    • During installation, e.g. behind the safety strip, the secondary connection is implemented by means of cable lugs through the side slots

    Expanded secondary terminal covering

    • In addition to the normal terminal covering, extra protective hoods are available
    • Locking of the front and rear feed to the secondary terminals

    General mechanical properties

    • Nominal frequency 50 – 60 Hz
    • Insulation class E (other classes on request)
    • Thermal rated short-term current Ith = 60 x IN/1s
    • Rated surge current Idyn = 2.5 x Ith, min., however 100 kA with all plug-on current transformers
    • Highest voltage for operating equipment Um = 0.72 kV
    • Rated insulation level (test voltage) 4 kV / 1 min (per EN 61869-2)
    • Over-current limit factor FS5 or FS10
    • Harmonics current up to 50th harmonic

Further information about Moulded case current transformers

  • article numbers

  • Moulded case current transformers 75/5 - ASK 21.3

    1503206

    Moulded case current transformers 80/5 - ASK 21.3

    1503207

    Moulded case current transformers 100/5 - ASK 21.3

    1503208

    Moulded case current transformers 75/5 - ASK 31.5

    1503270

    Moulded case current transformers 100/5 - CTB 31.35

    1503272

    Moulded case current transformers 150/5 - CTB 31.35

    1503273

    Moulded case current transformers 200/5 - CTB 31.35

    1503274

    Moulded case current transformers 250/5 - CTB 31.35

    1503275

    Moulded case current transformers 300/5 - CTB 31.35

    1503276

    Moulded case current transformers 400/5 - CTB 31.35

    1503277

    Moulded case current transformers 500/5 - CTB 31.35

    1503278

    Moulded case current transformers 600/5 - ASK 31.3

    1503279

    Moulded case current transformers 800/5 - CTB 41.35

    1503280

    Moulded case current transformers 1000/5 - CTB 41.35

    1503281

    Moulded case current transformers 1250/5 - CTB 51.35

    1503282

    Moulded case current transformers 1500/5 - CTB 61.35

    1503283

    Moulded case current transformers 1500/5 - CTB 81.35

    1503284

    Moulded case current transformers 1600/5 - CTB 81.35

    1503285

    Moulded case current transformers 2000/5 - CTB 81.35

    1503286

    Moulded case current transformers 2500/5 - CTB 101.35

    1503287

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