hxgn17-12 (f) cubicle (fixed type) alternating-current metal-enclosed ring main unit (hereinafter referred to as ring main unit) is a new generation of hv product designed and developed independently by our company by adopting overseas advanced technologies combined with the power requirements of our country. it is applicable for three-phase distribution systems of 50hz and rated voltage 10kv, used for electric energy receiving and distribution in factories and mine, residential districts, high-rise buildings, schools, parks and so on, also can be applied to ring network power supply and terminal power supply.
all internal components are national advanced products with excellent performances complying with relevant standards, are featured with small size, light weight, simple operation, small operation force, safe operation, convenient maintenance, reliable quality, less floor space, installation against wall is available, free of fire or explosion hazard, etc. through data analysis and expert appraisal, the technical parameters of our products have reached international advanced level among the similar products.
● ambient temperature: -40℃~ 45℃;
● relative humidity: daily mean not over 95%, monthly mean not over 90%;
● altitude: not exceed 4000m;
● the installation site should be free of fire, explosive danger, serious pollution, chemical corrosion or severe vibration.
item
|
unit
|
load switch
|
zfn21 vacuum
|
zfn11-12 vacuum
|
fn11-10 pressure-operated
|
rated voltage
max working voltage
rated frequency
rated current
rated short-time withstand current
rated short-time withstand current of ground circuit
rated peak withstand current
rated peak withstand current of ground circuit
|
kv
kv
hz
a
ka/s
ka/s
ka
ka
|
10
12
50
630
20/4
20/4
50
50
|
10
12
50
630
20/3
20/3
50
50
|
10
12
50
400、630、800
20/3
20/3
50
50
|
rated no-load transformer breaking current
main circuit, ground circuit and rated short-circuit making current
rated short-circuit breaking current of fuse
electric life at rated current
mechanical life
|
ka
ka
ka
times
times
|
6000kva transformer
50
31.5
1000
1000
|
1250kva transformer
50
31.5
100
200
|
1min power frequency withstand voltage (effective value)
to-ground/phase across the isolating distance
|
kv
|
42/48
|
power frequency withstand voltage isolating distance (effective value)
|
kv
|
53
|
lightning impulse withstand voltage (peak)
to-ground and phase-to-phase/across the isolating distance
|
kv
|
75/85
|
1min power frequency withstand voltage of secondary circuit
|
kv
|
2
|
rated switching current
|
a
|
3150
|
1300
|