China-Fn7-12D-MID-Voltage-Load-Break-Switch-with-Earth-Switch

FN7-12D Series Indoor H.V. Load Switch Witch With Earth Switch (Grounding Switch)

Summary
FN7-12DR is used in three-phase AC power network of AC 50Hz,rated voltage 12KV for breaking load current and controlling short-circuit current.
FN7(C)-12 type H.V load switch and fuse box is basied on the FN7-12 series H.V load switch. with operating mechanism. Make the installation more simpler. Can meet orders needs.


Normal Serviec Condition
1,The altitude does not exceed 1000m.2,The ambient air temperatrue : Max:+40oC. Min:-25oC.
3,The relatire humidity of air Daily average ≤95% . Monthly average ≤90%
4,The ambient air should not be obviously polluted by corrosivity or the flammability gas steam.Etc.
5,The working situation without frequent violent.


Appearance installation diagram
Summary
Classification Type DS
Earth switch at
the wire-in end
 
DK
Earth switch at
the wire-in end
L
Interlock device
R
Fuse box
RA
String fuse box
F
Off device by
motor
Without tripper FN7-12 _ _ _ _ _ _
FN7-12DSL  Δ _  Δ _ _ _
FN7-12DXL _  Δ  Δ _ _ _
FN7-12R _ _ _   _ _
FN7-12DSLR  Δ _  Δ  Δ _ _
FN7-12DXLR _  Δ  Δ  Δ _ _
With striking tripper FN7-12RAF _ _ _ _  Δ  Δ
FN7-12DSLRAF  Δ _ Δ _  Δ  Δ
FN7-12DXLRAF _  Δ  Δ _  Δ  Δ
 
Specified parameter
 (KV)
Rated voltage
(KV)
Max.voltage
(A)
Rated current
(KV)
1min power frequency withstand voltage
 (KA)
4S heat-stabling current(value)
 (KA)
Machine stabling current(peak)
 (KA)
Short-circuit controlling current
(A)
Rated switch-off current
(A)
Rated transfer current
12 12 400 42/48 12.5 31.5 31.5 400 1000
630 42/48 20 50 50 630 1000
 
Rated parameter of fuse box
Rated voltage (KV)
Rated current
(A)
Rated switch-off current
(A)
Fuse body rated current
SDLA*J 12 40 6.3,10,16,20,25,31.5,40
SFLA*J 12 100 50,63,71,80,100
SKLA*J 12 125 125
 
 

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