Liyond Vbi-12 12kv Circuit Breaker 630A Vcb Indoor Vacuum Circuit Breaker for Power Switchgear

• Customization: Available
• Breaking Capacity: High Voltage Circuit Breakers
• Operation: as Specification
• Model NO.: VBI-12
• Arc-extinguishing Medium: Vacuum
• Installation: as Specification
• Structure: as Specification
• Poles Number: as Specification
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection
• Rated Voltage: 12kv
• Rated Current: 630A
• Model Number: Vbi-12
• Current: 630A/1250A/2000A/3150A
• Frequency: 50/60Hz
• Pole: 3
• Pole Spacing: 150/210/275mm
• Type of Spring Operating Mechanism: Vbi Operating Mechanism
• Transport Package: Package
• Specification: normal
• Trademark: LIYOND
• Origin: China
• Package Size: 150.00cm * 80.00cm * 80.00cm
• Package Gross Weight: 70.000kg

Product Description

Product Description

Rated frequency: The standard value of the rated frequency is 16Hz, 25Hz, 50Hz. (Note: In China, the standard value of the rated frequency of the high voltage circuit breaker is 50Hz.)
1. Rated current: The current value that the main circuit of the high-voltage switchgear can continuously carry under the specified normal use and performance conditions. Such as 125A, 250A, 400A, 630A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A, 5000A, etc. Rated short-time withstand current: The rms value of the current that the switching device and control device can carry at the closing position within a specified short period of time under specified conditions of use and performance. Such as: 20kA, 25kA, 31.5kA, 40kA, 50KA, 63KA, 80KA.
2. Rated short-circuit breaking current: Under the specified conditions, the circuit breaker can guarantee the maximum short-circuit current of normal breaking.
3. Rated peak withstand current: The peak current of the first large half-wave of the rated short-time withstand current that the switchgear and control equipment can carry at the closing position under specified conditions of use and performance. Such as: 50kA, 63kA, 80kA, 100kA. The rated peak withstand current should be equal to 2.5 times the rated short-time withstand current.
4. Rated short-circuit duration: The time interval during which the switching device and the control device can carry the rated short-time withstand current at the closing position. The standard value of the rated short circuit duration is 2 s.
If necessary, you can choose a value less than or greater than 2s. The recommended values are 0.5s, 1s, 3s and 4s.     

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