The quick-action mechanism allows your PACT current transformers to be installed quickly and securely on the power rail. To do this, simply position the holding latch of the quick-action mechanism in the guide slot on the transformer. Two fixing pins ensure a tight hold.
Tool-free mounting with the transformer quick-action mechanism offers the following advantages:
In addition to the vertical and horizontal mounting position, the optional accessories offer further installation options:
All PACT current transformers are just 30 mm wide. If you are short of space, simply mount the transformer horizontally on the power rail. This saves space – for example when measuring branch outlets of the main supplying rail.
PACT current transformers offer safe isolation according to standard EN 50178. This is relevant for electronic equipment for use in power installations.
EN 50178 differs considerably from EN 60044, the usual standard for transformers, with regard to safety:
With PACT current transformers you can be sure that there is no sparkover on the secondary side of the transformer. Human life is protected inside and outside the control cabinet.
Operating voltage comparison
EN 50178 prescribes significantly higher impulse withstand voltages for transformer testing. When testing according to EN 60044, these requirements are no longer met from a rated insulation voltage of 480 V (L-L) upwards. PACT current transformers have significantly greater air and creepage distances and are individually tested with 12 kV. This ensures increased safety.
In EN 50178, the specified voltage relates to the phase/neutral conductor, which means that in this case the rated insulation voltage of a typical 720 V transformer is only 416 V (L-N). In system applications, PACT current transformers even support use up to 1000 V (L-N).
(standard for transformers)
(for power installations)
Rated insulation voltages
|480 V (L-L)|
720 V (L-L)
1000 V (L-L)
|277 V (L-N)|
416 V (L-N)
577 V (L-N)
1000 (L-N) PACT
Impulse withstand voltage for transformer testing
12 kV PACT
PACT current transformers can be used to safely detect current peaks greater than the rated nominal current strength – without resulting in any damage.
This is due to the fact that PACT current transformers are designed for a continuous nominal current that is 120% of the primary rated current strength. This means that for a rated current that is 1.2 times greater, a PACT current transformer with a specified rated power of 10 VA does indeed deliver 14.4 VA – and on a continual basis.
The connection technology for PACT current transformers from Phoenix Contact is based on the "elevator principle": when the screw is turned, a metal plate moves upwards, safely clamping the conductor.
This provides many advantages:
Furthermore, the current transformer can also be connected laterally using a fork-type cable lug when mounted horizontally.