KYN28A-12(GZS1-12Z) mid-set type metal-clad and metal-enclosed switchgear (hereinafter referred to as switchgear) is a new type product designed and developed by our company with domestic and international advanced technologies, it is an ideal upgrading product for replacing the old metal-enclosed switchgear such as KYN1-10, JYN2-10, GBC-10 and so on. Its advantages as follows:
● The cabinet shell is made of al-zinc-coated steel sheet, through CNC processing and multiple bending technique, then assembled with bolts. It is featured with high mechanical strength, neat and elegant appearance, powder coating treated door, good shock and corrosion resistance. Ingress protection level of the shell reaches IP4X.
● Main switch of switchgear can be configured with VD4 vacuum circuit breaker and C3 series fixed type load switch from ABB corporation, also can be configured with many homemade vacuum circuit breakers (such as VS1, VH1, VK, ZN28) instead of overseas similar products.
● No matter which circuit breaker selected, make sure that the air insulation distance of its bare conductor is larger than 125mm, and compound insulation is larger than 60mm. The breakers are featured with long service life, high parameters, less maintenance, small size, etc.
This switchgear is applicable for three-phase power grid of AC 50Hz and class 3.6~12kV, used for electric energy receiving and distribution, it controls, protects and monitors the circuits, can be used in single bus and single-bus segment system or dual-bus systems. This switchgear complies with IEC298 Alternating-current metal-enclosed switchgear and controlgear for rated voltage above 1kV and up to and including 52kV , IEC694 Common specifications for high-voltage switchgear and controlgear, GB3906 Alternating-current metal-enclosed switchgear for rated voltage of 3~36kV, DL404 Indoor AC high voltage switchgear panel, DIN.VDE0670 Alternating-current switchgear for rated voltage above 1kV, etc. It enjoys perfect and reliable anti-misoperation function.
● Ambient air temperature: -15℃~+40℃;
● Relative humidity: daily mean not over 95%, monthly mean not over 90%;
● Altitude: not exceed 4000m;
● Seismic intensity: not beyond Ms8;
● The installation site should be free of fire, explosive danger, serious pollution, chemical corrosion or severe vibration.
Special requirements beyond above conditions should be determined by both users and manufacturer through negotiation.
Technical parameters of switchgear
|
Item
|
Unit
|
Data
|
Rated voltage
Rated frequency
Rated current of circuit breaker
Rated current of switchgear
Rated peak withstand current (4s)
Rated peak withstand current (peak)
Rated short-circuit breaking current
Rated short-circuit making current (peak)
|
KV
Hz
A
A
KA
KA
KA
KA
|
3.6，7.2，12
50
630，1250，1600，2000，2500，3150，4000
630，1250，1600，2000，2500，3150，4000
16，20，25，31.5，40，50，63
40，50，63，80，100，125，160
16，20，25，31.5，40，50，63
40，50，63，80，100，125，160
|
|
Rated insulation level
|
1min power frequency withstand voltage
Lightning impulse withstand voltage
|
KV
KV
|
24
40
|
32
60
|
42
75
|
|
Protection class
|
The shell is IP4X, and it is IP2X when the compartment door and circuit breaker chamber door are opened
|
Technical parameters of VD4 and VS1-12 vacuum circuit breaker
|
Item
|
Unit
|
Data
|
Rated voltage
Rated frequency
Rated current of circuit breaker
Rated peak withstand current (4s)
Rated peak withstand current (peak)
Rated short-circuit breaking current
Rated short-circuit making current (peak)
|
KV
Hz
A
A
KA
KA
KA
KA
|
3.6，7.2，12
50
630，1250，1600，2000，2500，3150，4000
16，20，25，31.5，40，50，63
40，50，63，80，100，125，160
16，20，25，31.5，40，50，63
40，50，63，80，100，125，160
|
|
Rated insulation level
|
1min power frequency withstand
|
KV
KV
|
42
75
|
Rated operating sequence
Rated short-circuit current breaking times
Mechanical life
|
Times
Times
|
O-0.3s-CO-180s-CO
50
2000
|
Mechanical characteristics of VD4 and VS1-12 vacuum circuit breaker
When the circuit breaker is used to control the motor of 3~10kV, must apply metal-oxide arrester if the starting current is smaller than 600A, details should be determined by both users and manufacturer through negotiation. When the circuit breaker is used to disconnect the capacitor bank, rated current of the capacitor bank should not exceed 80% of rated current of circuit breaker.
|
Item
|
Unit
|
Data
|
Clearance between open contacts
Overtravel
Phase-to-phase central distance
Closing contact bounce time
Three-phase opening asynchrony
|
mm
mm
mm
ms
ms
|
11±1
4±0.5
210±0.5，250±0.5，275±0.5
≤2
≤2
|
|
Breaking time at operating voltage of
|
Max
Rating
Min
|
ms
ms
|
≤50
≤50
≤60
|
Closing time
Average closing speed
Average closing speed
Conductive circuit resistance
Contact pressure
|
ms
m/s
m/s
μΩ
N
|
≤100
0.9-1.2
0.6-0.8
≤40
3200±100
|
Technical parameters of operating mechanism
|
Item
|
Unit
|
Value
|
|
Rated operating voltage
|
Closing coil
|
V
|
DC220,110
|
|
Closing coil
|
V
|
DC220,110
|
|
Coil power
|
Closing coil
|
W
|
245
|
|
Closing coil
|
W
|
245
|
Power of energy-storage motor
Rated voltage of energy-storage motor
Energy-storage time
|
W
V
S
|
50
DC220,110
≤10
|
Main technical parameters of ZN□-12 (VHI) vacuum circuit breaker
|
Item
|
Unit
|
Parameter
|
Rated voltage
Rated frequency
Rated current
Rated short-circuit breaking current
Rated short-circuit making current
Rated peak withstand current
Rated short-time withstand current
Rated short-circuit duration
Rated breaking current of single capacitor bank
Rated breaking current of back-to-back capacitor bank
Power frequency withstand voltage
Lightning impulse withstand voltage
Rated short-circuit current breaking times
Mechanical life
|
KV
Hz
A
KA
KA
KA
KA
s
A
A
KV
KV
Times
Times
|
12
50
1250
31.5
80
80
31.5
4
630
400
42
75
50
1000
|
|
Rated operating sequence
|
|
O-0.3S-CO-180s-CO
|
Opening time
Closing time
Control voltage
Power of closing coil
Power of opening coil
|
ms
ms
V
VA
VA
|
|
