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KYN28-12 steel-clad movable AC metal-enclosed switchgear (hereinafter referred to as “switchgear”) applies to three-phase AC 50Hz, .3.6 ~ 12Kv power system for receiving and distributing electric energy and control, protection and testing of the circuit.
■ Standards
GB3906 (3 ~ 35kV AC metal-enclosed switchgear). GB/T11022 (common technical requirements on high-voltage switchgear and control equipment standards), IEC60298 (rated voltages above 1kV and below 50kV AC metal-enclosed switchgear and control equipment), DL / T404 (technical conditions on indoor AC high voltage switchgear ordering).
■ Model meaning
■ Normal service conditions
● The ambient air temperature: maximum temperature at +40 ℃, the lowest temperature -15 ℃;
● humidity: daily average relative humidity: ≤ 95%, the daily average vapor pressure not exceeding 2.2kPa, monthly mean relative humidity: ≤ 90%, the monthly average vapor pressure not exceeding 1.8 kPa;
● Altitude: 3000m and below;
● Earthquake intensity: not more than Degree 8;
● ambient air is not polluted by corrosive or flammable gases, or water vapor;
● At places with no recurrent severe vibration;
● When used in conditions beyond the normal environmental conditions prescribed in GB3906, solutions shall be found through negotiation between users and the manufacturer.
■The main technical parameters
| Item |
|
|
unit |
data |
|
Rated voltage |
|
|
KV |
3.6、7.2、12 |
|
Rated power |
|
|
Hz |
50 |
|
Rated current of circuit breaker |
|
|
A |
630、1250、1600、2000、2500、3150 |
|
Switchgear rated current |
|
|
A |
630、1250、1600、2000、2500、3150 |
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Rated short-time withstand current（4s） |
|
|
kA |
16、20、25、31.5、40 |
|
Rated short-time withstand current (peak) |
|
|
kA |
40、50、63、80、100 |
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Rated short-circuit breaking current |
|
|
kA |
16、20、25、31.5、40 |
|
Rated short-circuit making current (peak) |
1min power frequency withstand voltage |
|
kA |
40、50、63、80、100 |
|
Rated insulation level |
lightning impulse withstand voltage (peak) |
interelectrode, phase to earth |
kV |
24、32、42 |
|
Between open contacts |
kV |
24、32、48 |
|
|
interelectrode, phase to earth |
kV |
40、60、75 |
|
between open contacts |
kV |
46、70、85 |
|
Protection class |
|
|
Outside the lightIP4X、Isolation, the circuit breaker compartment door open for theIP2X |
Structural features
● switching device structure shown in Figure 1;
● Full metal enclosed, assembly structure, a wide range of combination scheme;
● cabinet made of imported aluminized galvanized steel sheet after CNC machining using advanced multi-folding process, connected with rivet nut and high-strength bolt, marked by high precision, corrosion resistance, light weight, high strength, general-purpose parts;
● it can be equipped with domestic VS1 series or imported VD4 series vacuum circuit breaker, with wide applicability and high reliability, maintenance-free for years;
● handcart has working and test positions, location and display device for the positions ensures safety and reliability.
●various handcarts accord with modular change by modulus to ensure the handcart with the same specification can be freely interchangeable and the handcart of different specifications must not enter;
● handcart transported by special trucks, simple and flexible operation;
● cable compartment can install up to nine single-core cables;
● Highly reliable interlock, fully meeting the “Five-prevention” requirements;
● The high-voltage chamber has pressure relief channel to ensure personal safety;
● front door equipped with observation windows to observe working condition of interior components.
■ switchgear structure diagram
■ Dimensions
Height B |
|
2300（2200）（mm） |
|
Width A |
rated current of branch miniature bus up to 1250A, thermal current 40KA |
800（mm） |
|
rated current of branch miniature bus above 1600A |
1000（mm） |
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Depth C |
cable inlet and outlet |
1500（mm） |
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Overhead inlet and outlet |
1660（mm） |
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