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VSG indoor high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is used for 12KV power system indoor switching equipment, as power grid equipment, industrial and mining enterprises power design protection and control unit, suitable for switching on and off loads of different nature and frequent operation, multiple times of short circuit current occasions. Product adopts the new type of circuit breaker operating mechanism, a VSG part can adopt international brand enclosed column, the vacuum arcing chamber and main electric circuit parts enclosed into a whole, to protect the arcing chamber from the effects of collision, dust and condensation, environment adaptable, greatly reduces the operation maintenance cost, realize the product a part of free maintenance, operation mechanism and less maintenance; Operation mechanism and circuit breaker body integrated design, through the type test verification,
the use of environmental conditions
A) Ambient temperature
Maximum temperature: +40C Minimum temperature: -150C
B) Environmental humidity
Daily average relative humidity : < 95%
Monthly average relative humidity : < 90%
Daily average vapor pressure: < 10-2.2 MPa
Monthly mean vapor pressure; < 1.8 x 10 mpa
C) Altitude: no more than 1000m;
Item | Unit | Data | ||||
1 | Rated voltage | kv | 12 | |||
2 | Maximum working voltage | kv | 12 | |||
3 | Rated current | A | 630 1250 | 630 1250 1600 2000 2500 3150 | 1250 1600 2000 2500 3150 4000 | |
4 | Rated short-circuit break current | kA | 20/25 | 31.5 | 40 | |
5 | Rated short-circuit close current (peak value) | kA | 50/63 | 80 | 100 | |
6 | Rated withstand current (peak value) | kA | 50/63 | 80 | 100 | |
7 | 4S Rated little withstand current | kA | 20/25 | 31.5 | 40 | |
8 | Rated insulation level | Industrial frequency withstand voltage | kA | 42/48 | ||
Thunder impulse withstand voltage | 75/85 | |||||
9 | Rated operation order | Off-0.3S on and off-180S-on and off | ||||
10 | Mechanical life | times | 10000 | |||
11 | Rated short-circuit current break and close time | times | 50 | |||
12 | Speak and move organization amount assign the current of the floodgate(DC) | V | AC.DC.110,220 | |||
13 | Speak and move organization amount equal to the current of the floodgate(DC) | V | AC.DC 110,220 | |||
14 | Switching distance of the contact | mm | >11 | |||
15 | Ultra journey(touches the head spring and compress length) | mm | 4+/-0.5 | |||
16 | Three-phase breaking into shut floodgate sex of the same period | ms | <2 | |||
17 | Touch the head and shut a floodgate of time of bouncing | ms | <2 | |||
18 | Average speed of breaking brake | m/s | 0.9~1.2 | |||
19 | Average speed of closing brake | m/s | 0.5~0.8 | |||
20 | Time of breaking brake | Operate it under the voltage highest | s | <0.05 | ||
Operate it under the voltage lowest | <0.08 | |||||
21 | Time of colsing brake | s | <0.1 | |||
22 | Each the resistance of main return circuit | u Ω | <45 | |||
23 | Allowance abrasion cumulated thickness of the moving and stationary contact | mm | 3 | |||
