KYN28-12 Armoured Middle-Mounted Metal Enclosed Switchgear
Product Model
Technical Parameters
|
Rated Voltage (kV) |
3/6/10 |
|
Maximum Operating Voltage (kV) |
3.6/7.2/12 |
|
Power Frequency Withstand Voltage (kV) |
42(1min) |
|
Impulse Withstand Voltage (kV) |
75 |
|
Rated Frequency |
50Hz |
|
Rated Current(A) |
630-3150 |
|
Rated Thermal Stability Current(kA/4s) |
16-50 |
|
Rated Dynamic Stability Current (KA) |
40-125 |
|
Rated Short-Circuit Breaking Current(kA) |
16-50 |
|
Rated Short-Circuit Making Current(KA) |
40-125 |
|
Rated DC Voltage for Opening/Closing Switch and Auxiliary Circuits |
24,30,48,60,110,220,AC 110,220 |
|
Protection Class |
IP4X |
△Technical data for VSI and VD4 vacuum circuit breakers are shown in the table below:
|
Items |
Unit |
VSI |
VD4 |
|||
|
Rated Voltage |
kV |
3.6 |
6 |
10 |
||
|
Maximum Operating Voltage |
kV |
3 |
7.2 |
12 |
||
|
Rated Insulation Level |
Power Frequency Withstand Voltage for 1 minute |
kV |
42 |
|||
|
Lightning Impulse Withstand Voltage |
kV |
75 |
||||
|
Rated Frequency |
Hz |
50 |
||||
|
Rated Current |
A |
630,1250,1600,2000,2500,3150, |
||||
|
Rated Short-Circuit Breaking Current (RMS) |
kA |
16,20,25,31.5,40,50 |
||||
|
4S Thermal Stability Current (RMS) |
kA |
16,20,25,31.5,40,50 |
||||
|
Rated Dynamic Stability Current (Peak) |
kA |
40,50,63,80,100,125 |
||||
|
Transient Recovery Voltage Rate |
kV/ms |
0.345 |
0.415 |
|||
|
Peak Transient Recovery Voltage |
kV |
20.6 |
30 |
|||
|
Rated Operation Sequence |
|
Split - 0.3 seconds - Merge - 180 seconds - Merge |
||||
|
Automatic Reclosing Operation Sequence |
|
Split - 0.3 seconds - Merge split - 3 minutes - Merge split |
||||
|
Multiple Reclosing Operation Sequence |
|
Split - 0.3 seconds - Merge - 15 seconds - Merge - 15 seconds - Merge |
||||
|
Closing Time |
ms |
100 |
70 |
|||
|
Opening Time |
ms |
20 |
45 |
|||
|
Arcing Time |
ms |
15 |
15 |
|||
|
Breaking Time |
ms |
65 |
60 |
|||
The schematic diagram of the switchgear structure
The Outline Dimensions of the Switchgear
* For Rated Currents Exceeding 1600A, the Dimension is 1000mm; for Others, it is 800mm
** Cable Inlet and Outlet Dimensions: 1500mm for Overhead Lines and 1660mm for Overhead Lines
Switchgear Base Installation Diagram
|
Cabinet Width |
Cabinet Depth |
M |
N |
L |
|
800 |
1500 Cable |
630 |
800 |
1450 |
|
1660 Overhead |
1610 |
|||
|
1000 |
1500 Cable |
830 |
1000 |
1450 |
|
1660 Overhead |
1610 |
Switchgear Installation Dimension Diagram
|
Cabinet Width |
Cabinet Depth |
L1 |
L2 |
L3 |
|
800 |
1500 Cable |
530 |
630 |
800 |
|
1660 Overhead |
||||
|
1000 |
1500 Cable |
730 |
830 |
1040 |
|
1660 Overhead |
Switchgear Installation Dimension Diagram
|
Cabinet Depth |
L |
|
1500 |
1450 |
|
1660 |
1610 |
Product Functions
This switchgear is primarily used for power distribution, receiving, and supplying electricity in secondary substations. Its core functions include the control, protection, and monitoring of electrical circuits. A key application is the safe starting and control of large high-voltage motors. It effectively manages power flow within 3.6-12kV networks, ensuring system stability and safety through its integrated design and protective relaying capabilities.
Applicable Environment
◇Normal Conditions:
1.Ambient Temperature: -10℃ to +40℃.
2.Altitude: ≤ 1000 meters.
3.Relative Humidity: Daily average ≤95%, monthly average ≤90%.
4.Seismic Withstand: Intensity not exceeding 8 degrees.
5.Installation Site: Free from severe pollution, excessive vibration, corrosive or flammable gases.
◇Special Conditions: For environments exceeding standard specifications (e.g., higher altitude, humidity, or temperature), requirements must be negotiated between the user and manufacturer.
Product Highlights
◆Comprehensive Safety: Equipped with a full set of mechanical interlocks to prevent critical errors like pushing/pulling the circuit breaker handcart under load, closing the grounding switch on live circuits, or accessing live compartments.
◆High Compatibility: Offers flexible configuration, supporting both widely-used domestic VS1 vacuum circuit breakers and the internationally recognized ABB VD4 model.
◆Standards Compliance: Manufactured in accordance with major international (IEC 298) and national (GB/T 3906, GB/T 11022, DL 404) standards for high-voltage switchgear.
◆Robust Design: Built as a metal-clad, medium-voltage assembly for reliable operation in demanding industrial and utility applications, ensuring long-term performance and safety.