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
Request a custom quote or a personal phone consultation:
External content from Pardot
To protect your personal data, the connection to Pardot has been blocked. Click on the button to unblock the Pardot form. By unblocking the form, you accept Pardot's privacy policy. You can find more information about Pardot's data protection in our privacy policy.
Show external content
