Summary
FKN12-12D series air-blast Ioad break switch and FKRN12-12D series air-blast load break switch-fuse combination apparatus are new
series switchgear applies to three-phase electric distribution system of rated 12kV, acting as protecting and control apparatus for
transformers, cable and overhead wiring. These series are especially applicable in rural, urban terminal substation and prefabricated
substations, as well as ring network power supply. FKN12-12D can break and make Ioad current and over-current. FKRN12-12D can
break and make over-current load current and short-circuit current(Iimited current fuse).
This product is featured with impact structure aesthetic appearance. reliable interlock and high insulating level. In the spring storage
operation mechanism, ON/OFF speed is free from the influence of the manpower. For the arc-extinguish, electric arc-extinguish inside
the insulating cover, the free gas occurs at sparking do not cause descend of insulating level between phases and phase to earth. The
insulation cover clapboard separates electrified part thus boost protection grade of ring main unit. The copper-tungsten contact and
main contact brings along reliable conductivity and long life. This product achieves sound fame due to easy maintenance and operation
as well as reliable performance. It is in compliance with IEC62271-105.
Ambient conditions
1. Altitude: ≤1000m;
2. Ambient temperature: -25%~+40℃;
3. Relative humidity: daily average≤95%, monthly average≤90%;
4. Eadhquake intensity: ≤8 degree;
5. Pollution degree: Ⅱ;
6. Applicable occasions should be free from inflammables, explosives, corrosives and severe vibration.
Model
Technical specification
|
No.
|
Item
|
Unit
|
FZN12-12D
|
FKRN12-12D(HRC fuse)
|
|
1
|
Rated voltage
|
kV
|
12
|
12
|
|
2
|
Rated power frequency
|
Hz
|
50/60
|
50/60
|
|
3
|
Rated currenl
|
A
|
630
|
125
|
|
4
|
1 min PF withstand voltage(phase to eadh，phase to phase)
|
kV
|
42
|
42
|
|
5
|
1 min PF withstand Voltage(across open contacts)
|
kV
|
48
|
48
|
|
6
|
Lightning impulse withstand voltage(phase to each, phase to phase)
|
kV
|
75
|
75
|
|
7
|
Lightning impulse withstand voItage(across open contacts)
|
kV
|
85
|
85
|
|
8
|
Rated short-time withstand current(thermal steadily)-LBS
|
kA
|
20
|
|
|
9
|
Rated short-time withstand current(thermal steadily)-earthing switch
|
kA
|
20
|
|
|
10
|
Rated short-circuit duration(thermal steadily time)-LBS
|
s
|
4
|
|
|
11
|
Rated short-circuit duration(thermal steadily time)-earthing switch
|
s
|
2
|
|
|
12
|
Rated short-circuit making current(peak)
|
kA
|
50
|
|
|
13
|
Rated breaking current active load breaking current
|
A
|
630
|
|
|
14
|
Rated breaking current loop breaking current
|
A
|
630
|
|
|
15
|
5% of rated active load breaking current
|
A
|
31.5
|
|
|
16
|
Rated breaking current cable charging current
|
A
|
10
|
|
|
17
|
Rated breaking current no-load transformer capacity
|
kVA
|
1250
|
|
|
18
|
Rated short-circuit breaking current(fuse)
|
kA
|
|
31.5
|
|
19
|
Rated transfer current
|
A
|
|
1200
|
|
20
|
Mechanical life
|
Times
|
2000
|
2000
|
|
Mechanical performance
|
No.
|
Item
|
Unit
|
Data
|
|
1
|
Distance of open contacts
|
mm
|
≥175
|
|
2
|
Central distance of poles
|
mm
|
210±2
|
|
3
|
Air clearance of poles
|
mm
|
≥125
|
|
4
|
Travel
|
mm
|
210±4
|
|
5
|
Over-travel
|
mm
|
≥40
|
|
6
|
Three pole making asynchronous
|
ms
|
≤10
|
|
7
|
Three pole breaking asynchronous
|
ms
|
≤5
|
|
8
|
Release tripper breaking time
|
ms
|
40~65
|
|
9
|
Main circuit resistance
|
μΩ
|
≤130
|
|
Outline dimension
|
A
|
H
|
C
|
D
|
E
|
F
|
K
|
J
|
L
|
M
|
N
|
P
|
R
|
S
|
T
|
U
|
V
|
W
|
Z
|
Weight
|
|
FKN12-12D
|
390
|
880
|
600
|
210
|
648
|
270
|
67
|
50
|
155
|
287
|
171
|
368
|
11
|
337
|
170
|
94
|
105
|
868
|
180
|
70kg
|
|
4009-616-916
