KYN28A-24(SDK1-24) Metal-clad AC Withdrawable Switchgear
KYN28A-12(GZS1 -12) Indoor AC metal-clad withdrawable switchgear (Hereafter referred to as"switchgear") is an advanced medium voltage switchgear, developed by Xi'an Senyuan corporation.
KYN28A-12(GZS1 -12) Indoor AC metal-clad withdrawable switchgear (Hereafter referred to as”switchgear”) is an advanced medium voltage switchgear, developed by Xi’an Senyuan corporation. We had developed the miniaturization withdrawable switchgear cabinet of 650width based on their technologies. It is suitable for the applications in three-phase AC electric power system with rated voltage of 12kv and rated frequency of 50Hz, for the acceptance and distribution of the power, and also provides control, protection, and monitor of the circuit. Technical transferred is also provided by the same corporation.
1. Working environment
a.Environmental temperature: -10″0 〜40″0
b. Environmental humidity: the daily average value should be no greater than 95%, the monthly average value should be no greater than 90%. 2
c. Altitude: lower than 1000m.
d.Earthquake proof degree: earthquake intensity no more than 8 degrees.
e. The around atmosphere should not contain distinct pollutions such as corrosive or flammable gas or steam..
f. No severe contamination or frequency severe vibration, and the design of rigid grade under rigid condition should meet the requirements of grade 1.
g. lf the working conditions can not meet the environmental requirements of GB3906, please negotiate with the manufacturer. Notes: Electric heater should put in operation when relative humidity exceeds 70%.When working site is beyond the altitude of 1000m, it should conform to national standard.
VS1 indoor vacuum circuit breaker (front and side view)
VS1 indoor vacuum circuit breaker 150mm vs 650mm width
2. Applicable standards:
GB3906-2006: AC metal-clad closed switchgear and control equipment 3.6kV-40.5kv
GB11022-1999: General technical qualification of high-voltage switchgear and control equipment
IEC62271 -200/2003: AC metal-clad close switchgear and relevant control equipment with rated voltage between 1 kV and 52kv
DL/T404-2007: AC metal closed switchgear and control equipment 3.6kV-40.5kv
3. Technical parameters:
3.1 Technical parameters of switch equipment, refer to Table 1
Table 1
Item
Unit
Parameter
Rated voltage
kV
3,6,7.2,12
Rated frequency
Hz
50
Rated current of the circuit breaker
A
630,1250,1600,2000,2500,3150
Rated current of the switch cabinet
A
630,1250,1600,2000,2500,3150
Rated thermal current (4s)
kA
16,20,25,31,5.40,50
Rated dynamic current (peak value)
kA
40,50,63,80,100,125
Rated short circuit drop out current
kA
16,20,25,31.5,40,50
short circuit making current (peak value)
kA
40,50,63,80,100,125
Rated insulation ability
1min power frequency withstand voltage
kV
24
32
42
Lightening impact withstand voltage
kV
40
60
75
protection degree
IP4X for shell,and IP2X When breaks room door is open
3.2 Technical parameters of VD4、 VS1-12 vacuum circuit breaker and FP series sulfur hexafluoride circuit breaker
a. Technical parameters of VD4^ VS1-12 vacuum circuit breaker and FP series sulfur hexafluoride circuit breaker, refer to Table 2
Table 2
Item
Unit
Parameter
Rated voltage
kV
3,6,7,2.12
Rated frequency
Hz
50
Rated current of the circuit breaker
A
630,1250,1600,2000,2500,3150
Rated thermal current(4s)
kA
16,20,25,31,5.40,50
Rated dynamic current(peak value)
kA
40,50,63,80,100,125
Rated short-circuit drop out current
kA
16,20,25,31.5,40,50
Short-circuit making current (peak value
kA
40,50,63,80,100,125
Rated insulation ability
1min power frequency withstand voltage
kV
42
Lightening impact withstand voltage
kV
75
Rated operating sequence
kA
breah-0.3s-close breaking-180s-close breaking
Rated short-circuit current making time
time
50
Mechanical life
time
20000
b. Mechanical feature of VD4、VS1 vacuum circuit breaker and FP series sulfur hexafluoride circuit breaker, refer to Table 3
Table 3
ltem
Unit
Parameter
Switching distance of the contact
mm
11±1
Contact exceed range
mm
4±0.5
Center distance between phases
mm
150±0.5,210±0.5,250±0.5,275±0.5
Closing contact bounce time
ms
<2
Different period of three-phase break
brake
ms
<2
reak brake time when voltage
Max
ms
<50
Rated
ms
<50
Min
ms
<60
Making time
ms
C100
Average opening speed
m/s
0.9-1.2
Average opening speed
m/s
0.6-0.8
Circuit direct current resistance of each phase
0
<40
Contact pressure
N
3200±100
When the circuit breaker is applied to control 3-1 Okv electromotor, AC 600A, a metal-oxide surge arrester must be installed;clients can consult with manufacturer for the detailed requirements. When the circuit breaker is aplied to cut off the capacitor the group, the rated current of capacitor group should not be the circuit breaker.
3.3 Technical parameters of operation mechanism, refer to Table 4
The switchgear is designed according to GB3906 metal-clad closed switchgear. It composes of a main body enclosure and a withdrawable component (called handcart). The enclosure is divided into four separate rooms. The protection lever of the shell will be IP4X, and if the door of separate room or breaker room is open, then the protection lever should be IP2X. There are several functional schemes such as overhead inlet and outlet overhead line, inlet and outlet cable, forming a whole electric power distribution system device. This switchgear can be installed, commissioned and maintained from the front, which makes it possible to be arranged as back-to-back, side-to-side, or against the wall.
5.1 Shell and auxiliary
The main body enclosure formed by import zinc steel plate coated with aluminum, double-bented by CNC machine. Owning to this advance process, the cabinet gains less weight, higher mechanical strength and more artistic outward appearance compared with other products, as well as the advantage of higher precision, strong anti-corrosion and anti-oxidation capacity. The cabinet adopts assembling configuration. It is connected with high intention nuts and bolts, thus the process manufacture period is shortened, while occupying less area, the components are highly optimized for general use, so it is easier for organization.
5.2 Handcart
The framework of handcart, alike the cabinet, is formed by steel plate, and processed by CNC machine. The handcart is insuloted from the cabinet when combined. The mechanical interlock is safety, reliable and flexible. Based on the different usage, there are circuit breaker handcart, potential transformer handcart, measure handcart and separate handcart. All kinds of handcart can be organized on basis of modulus. The same type of handcart can be replaced. In cabinet, handcart may be at break position, testing position, or working position, each one has its own locating device to ensure reliable interlock followed by the operation procedure to prevent interlock disoperation. All handcarts are fixed by nut or spindle, so the operation is convenient and flexible for all operators. The handcart can be easily drawn out from the cabinet for inspection and maintenance. Due to the withdrawable adoption, it saves space and is easily to be inspected and repaired.
5.3 Separate room
Each main electric unit has a separate room, that is, circuit breaker handcart room, busbar room, cable room and relay control room.All the rooms can achieve IP2X protection level. Except for the relay control room, the other three separate rooms are equipped with a release pathway. Owning to the withdrawable type, the increased cable room enable the multiple cable are connected.
5.4 Interlocking device to prevent fault operation
Metal clad switchgear is equipped with reliable interlocking device, satisfying the “Five Standards** .
a. There is an obvious button or KK type alternation switch to prevent fault operation.
b. Only when the circuit breaker handcart is under test or operation site, the circuit breaker can be used to switch on or switch off. In addition, the handcart is not able to move while the circuit breaker is switched on. It helps to stop on-load wrong operation.
c. Only when the earthing switch is on the breaking site, the circuit breaker handcart is able to be moved from the breaking or test site to operation site. Only when the circuit breaker handcart is on the test or breaking site, the earthing switch can be switch off (the earthing switch can be fitted with voltage indicator). Thus it helps to avoid switching off the earthing switch when under hot line, as well as switching on the circuit breaker when earthing switch is on closed site.
d. In order to prevent the staff access to the area, the bottom door and back door cannot be open when the earthing switch is on breaking site.
e. When the circuit breaker handcart is located on the test or operation site without control voltage, it can only be operated by manual mode, not automatic mode.
f. When the circuit breaker handcart is on the operation site, secondary plug is locked and not able to be pulled out.
g. Electric interlock is applied for each cabinet. The switchgear can be equipped with electromagnet locking device on the earthing switch to improve reliability. Customers choose whether they need it or not.
5.5 Pressure relief device
There are pressure relief devices installed in the circuit breaker room, busbar room and cable room. When the inner fault occurs with arc, pressure inside the cabinet will increase. Then the special preassemble gasket on the door seals the cabinet in the front. Finally the pressure relief device on the top open automatically to release the pressure, ensure the safety of operator and switchgear itself.
5.6 Secondary plug and handcart interlock
The secondary circuit of switchgear and handcart are interlocked through manual secondary aviation plug. Moving-contact from secondary plug is connected with circuit breaker handcart by nylon corrugated expansion pipe. The secondary static contact base is fixed on the top right of the handcart. Only when the handcart is set on the test or breaking site, the secondary plug can be plugged in or pulled out. When the circuit breaker handcart is on the operation site, the secondary is locked and cannot be pulled out since the function of mechanical interlock works. As the closing mechanism of circuit breaker handcart is locked by the electromagnet, the handcart is only able to be switched off when the secondary plug is disconnected.
5.7 Charged display device
There is a charged display device for testing the primary circuit if customer requires. This device consists of high pressure sensor and portable display. They are connected together with wires as a whole. It not only shows the high pressure circuit status, but also can be cooperated with electromagnetic lock to force earthing switch handle and net door locked. This manner helps to prevent switching off earthing switch with live and accessing into the live zone, to avoid faulty operation.
5.8 Condensation and corrosion prevention
In order to avoid danger when operating in the high humidity and large fluctuations temperature, heater is installed in the circuit breaker room and cable room separately, to prevent corrosion in above environment.
5.9 Earthing device
There is an individual earth copper busbar with a dimension of 5X40mm2 in the cable room which is going through adjacent switchgear, and has a good contact with the switchgear body. This busbar is used for components that are earthing directly. Meanwhile, since the whole switchgear body is made up of aluminum zinc plate, it makes a good earthing status to protect the operator and switchgear.
This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.
Strictly Necessary Cookies
These cookies are essential to provide you with services available through our website and to enable you to use certain features of our website.
Without these cookies, we cannot provide you certain services on our website.
If you disable this cookie, we will not be able to save your preferences. This means that every time you visit this website you will need to enable or disable cookies again.
Tracking cookies
These cookies are used to collect information to analyze the traffic to our website and how visitors are using our website.
For example, these cookies may track things such as how long you spend on the website or the pages you visit which helps us to understand how we can improve our website for you.
The information collected through these tracking and performance cookies do not identify any individual visitor.
Please enable Strictly Necessary Cookies first so that we can save your preferences!
Targeting and advertising cookies
These cookies are used to show advertising that is likely to be of interest to you based on your browsing habits.
These cookies, as served by our content and/or advertising providers, may combine information they collected from our website with other information they have independently collected relating to your web browser's activities across their network of websites.
If you choose to remove or disable these targeting or advertising cookies, you will still see adverts but they may not be relevant to you.
Please enable Strictly Necessary Cookies first so that we can save your preferences!
Cookie Policy
Your privacy is important to us
Cookies are very small text files that are stored on your computer when you visit a website. We use cookies for a variety of purposes and to enhance your online experience on our website (for example, to remember your account login details).
You can change your preferences and decline certain types of cookies to be stored on your computer while browsing our website. You can also remove any cookies already stored on your computer, but keep in mind that deleting cookies may prevent you from using parts of our website.
Contact us!×
We're not around but we still want to hear from you! Leave us a note: