Product Description

KEEYA's Indoor Vacuum Circuit Breakers are designed and manufactured to meet rigorous industry standards, ensuring optimal performance and safety. We collaborate with reputable suppliers to source top-notch components, further guaranteeing the quality of their products.

The VS1-12 side-type Indoor Vacuum Circuit Breaker is designed for indoor high-voltage applications, specifically tailored for systems with a rated voltage of 12kV and a frequency of 50Hz. It serves as crucial protection and control equipment. Leveraging the unique advantages of a vacuum circuit breaker, it proves especially well-suited for scenarios requiring frequent operations under rated power flow or in cases of high short-circuit currents.

Stipulated Environmental Parameters:

1. Operating temperature range: -25℃ to +40℃

2. Relative humidity: Daily average not exceeding 95%; Monthly average not surpassing 90%.

3. Saturated vapor pressure: Daily average not surpassing 2.2kPa; Monthly average not exceeding 1.8kPa.

4. Seismic activity: Must not surpass 8 degrees on the Richter scale.

5. Altitude above sea level: Up to 1000m (excluding special requirements).

6. Environmental specifications: Intended for use in areas free from fire hazards, explosive atmospheres, heavy contamination, chemical erosion, and severe vibration.

Indoor Vacuum Circuit Breaker Key Structural Characteristics:

1. The availability of two types of vacuum tubes, large and small, provides options. The outer insulation is designed to resist corrosion and wear, resulting in a high breaking capacity and a long contact lifespan.

2. Utilizing high-precision springs, along with silver-plated and bound copper contacts, ensures enhanced safety and effectiveness.

3. The adoption of a composite insulation structure not only minimizes pollution and explosion risks but also guarantees a high level of insulation. This design facilitates straightforward maintenance and prolongs the operational life.

4. The product features specific contact positions, allowing for easy visual confirmation through a window, which helps prevent incorrect operations at a glance.

Technical parameter

serial number	project		units	data
1	The rated voltage		kV	12
2	Rated frequency		Hz	50
3	Rated current		A	630~1250	1250	1250
4	Rated short circuit breaking current		kA	20	25	31.5
5	Rated short circuit closing current		kA	50	63	80
6	Rated peak tolerable current		kA	50	63	80
7	4S rated short circuit resistance current		kA	20	25	31.5
8	Rated insulation level	Power frequency withstand voltage (before and after rated break)	kA	42（fracture48）
		Impact withstand voltage (before and after rated break)	kA	75（fracture85）
9	Rated sequence of operation			points-0.3s-us points-180s-us points
10	Mechanical life		next	10000
11	Rated short circuit breaking current breaking times		next	50
12	Operating Mechanism Rated Closing Voltage (DC)		V	110,220
13	Rated tripping voltage of operating mechanism (DC)		V	110,200
14	From contact		mm	11±1
15	Overstroke (compression length of contact spring)		mm	3.5±0.5
16	Three - phase points, closing bounce time		ms	≤2
17	Contact closing bounce time		ms	≤2
18	Average brake speed		m/s	1.1±0.2
19	Average closing speed		m/s	0.6±0.2
20	Break-brake time	At the highest operating voltage	S	≤0.05
		At the lowest operating voltage	S	≤0.08
21	Closing time		S	0.1		50
22	Main loop resistance of each phase		μΩ	60
23	Allowable wear cumulative thickness of dynamic and static contacts		mm	3