Hughes VX4-12 series of kiosk vacuum circuit breaker is designed for use on underground distribution lines with the voltage range 6-12kV, in distribution substation applications and as an advanced Smart Grid building block.

The VX4-12 series of kiosk vacuum circuit breaker model range:

• VX4-12 model of vacuum circuit breaker is equipped with 12kV bushings;

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The VX4-12 vacuum circuit breaker components: 

• 12kV bushings (1) of epoxy, no SF6 gas or oil;
• High current vacuum breaker element (1), AMF type for 630 or 1250A continuous line load and 25kA fault current in 3 sec;
• Frame (2) made of 5 and 4mm stainless steel to eliminate electrochemical corrosion;
• Electrical circuit (3) made of high grade copper;
• Manual or remote maneuvering (4);
• Padlock facility (5) for mechanical blocking of operation;

Optional components:

• Integrated 3x phase current transformers (6);
• Clip-on current transformers and a core balance transformer for low earth faults detecting (cable mount);
   

VX4-12/24 kiosk VACUUM CIRCUIT BREAKER EXTERNAL ACCESSORIES:

• Hand crank operated truck mount (1) with interlock function;
• New! Grounding system cable theft alarm (2). See details here;
• Clip-on current transformer, winding: 150/1;
• Core balance transformer (3), winding: 20/1;
• Voltage transformer (4) 1-phase connection 12 or 24/.110 kV class1, 50 VA;

Complete list of external accessories is here.
 

VXR installation in a substation breaker bay. 

• Left: inner protection door closed. Circuit breaker operation buttons (1) extender is mounted on the door;
• Right: VXR (2) installed in a mounting frame (3). Upper side connected to a disconnector (4) with visual open points. Lower side connected to an outgoing cable (5);