Current Transformer JK-G / JKS-G
Cable current transformers of type JK-G / JKS-G are used in outdoor applications for medium or high voltage systems. They are mounted over the high or medium voltage cable and transform currents up to 3000 A into standardized values for meters, measuring and protection tasks.
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The cable provides the insulation against high voltage in this transformer type and also represents the primary winding of the current transformer. The current transformer itself is installed on a frame or crossmember over the cable. The active parts are cast in a polyurethane resin protected by an aluminum housing. The split core current transformers are opened and closed with M8 screws located on the sides. The secondary terminals are routed in a terminal box to M6 cast sockets. The connection to the secondary circuit can be realized with appropriately sized cable lugs. Type JK-G The type JK-G current transformer is a single unit. Up to 4 cores are possible, depending on the type. An IP 65 degree of protection is achieved here. With regards to installation, only vertical mounting with + / – 60° deviation for reasons of outdoor reliability. Type JKS-G The type JKS-G current transformer has a split core. Maximum of two cores possible, dependent on the translation and class. An IP 53 degree of protection is achieved here. With regards to installation, only vertical mounting with + / – 30° deviation for reasons of outdoor reliability.
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Features
- Degree of protection possible up to IP 65 (IP 53)
- Suitable for up to 4 (2) current transformer cores, dependent on ratio and class
- 4 different transformer hole diameters: 85 mm, 115 mm, 145 mm, 225 mm
Specifications and Downloads
Technical Specifications
Dimensions
![](/fileadmin/_processed_/7/5/csm_JKS-G_drawing_2548ec71ac.gif)
Technical data
Type JK-G / JKS-G | ||
Standard | DIN / IEC / IEEE | |
Highest voltage for equipment | kV | 0.72 |
Rated power-frequency withstand voltage | kV | 3 |
Frequency | Hz | 16.7 / 50 / 60 |
Primary rated current | A | 1 - 3000 |
Secondary rated current | A | 1 /5 |
Rated short-time thermal current [lth] | kA / 1s | 100 x ln |
Rated dynamic current [ldyn] | kA | 2.5 x lth |
Accuracy class | 0.1-3; 0.2S; 0.5S; P; PR; PX; PXR; TPX; TPY | |
Max. number of CT cores | 1 |
Type | JK-G | JKS-G | |
Diameter | mm | 80 / 110 / 140 | 85 / 115 / 145 |