JLD
(12-170) kV

CURRENT TRANSFORMERS | INDOOR AND OUTDOOR OPERATION

  • Porcelaine or silicone bushing available
  • Can be equipped with several CT's
  • Various versions for indoor and outdoor application
  • Primary current up to 5000 A

Bar current transformers of type JLD are used in indoor and outdoor applications for medium or high voltage systems. They transform currents up to 5000 A into standardised values for meters, measuring and protection devices.

General description

Bar current transformers of type JLD are used in indoor and outdoor applications for medium or high voltage systems. They transform currents up to 5000 A into standardised values for meters, measuring and protection devices.

Bar current transformers are typically used in wall, floor or ceiling openings. They consist mainly of a wall bushing and the coupled current transformer part. The wall bushing provides the insulation against high voltage and also represents the primary winding of the current transformer. Up to 5 cores can be included in the current transformer part. Degrees of protection can optionally be provided between IP 20 and IP 65.

Bar current transformers of type JLD can be designed for outdoor / outdoor, outdoor / indoor and indoor / indoor applications. The corresponding wall bushing and insulation type of the current transformer part must be appropriately selected. A silicone-shielded wall bushing with a current transformer part cast in outdoor-resistant casting resin is used for outdoor applications.

The current transformer parts are cast in polyurethane (PUR) for indoor applications. A special core padding ensures that the magnetic properties are not affected by thermal compression stresses. This allows the class accuracy to remain constant over decades.

Advantages
JLD (12-170) kV
  • Suitable for installation in wall, floor and ceiling openings

  • Suitable for indoor or outdoor applications with degree of protection up to IP 65

  • Primary currents possible up to 5000 A

  • Low space requirements as installation possible in wall openings

  • Up to 5 cores possible

  • High short circuit current values possible
Technical data
Type JLD
12
24
36
72
123
145
170
StandardIEC / IEEE
Highest voltage for equipmentkV12243672.5123145170
Rated power-frequency withstand voltagekV5070140230275325
Rated lightning impulse withstand voltagekV125170325550650750
FrequencyHz16.7 / 50 / 60
Primary rated currentA1 - 5000
Secondary rated currentA1 / 5
Rated short-time thermal current [Ith]kA / 1s100 x In
Rated dynamic current [Idyn]kA2.5 x Ith
Accuracy class0.1-3; 0.2S; 0.5S; P; PR; PX; PXR; TPX; TPY; TPZ
Max. number of CT cores5