Medium Voltage Distribution

Medium Voltage Distribution
Medium Voltage Distribution
Merlin Gerin circuit breaker
Cradle for SF1
Up to 24kV, 1250 A, 25kA
Ready to install withdrawable
circuit breaker in all type of
cubicle for a complete safe to
operate.
withdrawable SF1 circuit breaker
nSF6 breaking technique
n3 separated poles
nelectrical RI operation mechanism including:
n electrical "closing" and 'opening" system:
n electrical spring charging device;
n operations counter.
nslide-out truck fitted with:
B a earthing clip;
n a mechanical system securing the unit being
withdrawn only possible in "open" state;
n a mechanical system securing the unit
operations (closinghpening) only possible in
'service" or "test" position.
nfixed portion fitted with:
n bushings: electrical insulating and built-in
contacts;
n metal safety shutters: automatically blank off
the fixed contacts and manually be pad-lockable in
"testgposition;
n a guide rail at the bottom;
a earthing pad: to maintain the continuity to
earth while the unit being inserted.
The LV plug of unit, which used to connect
auxiliary circuits, cannot be accessed In
" S e ~ k e posltlon
"
but In "test" posltlon.
n bushings with
metallic shutters
position
n interlocking and padlocking
n conformity standard:
IEC 60694:
common specifications for high voltage switchgear
IEC62271-100:
.high voltage alternating current circuit breakers
n operating and test
Clipsal
Merlin Gerin
Square D
-r_m
_--
_
_-..!
Rated voltage
Insulation level
kV
24
kV rms.lmm
50
kV im~ulse
125
Rated current
630 A
1250 A
Breaking
capacity
kA
rms
12,5
.
Making capacity
kA peak
31,5
12.5
Permissible short time kA rms.3~
withstand current
O-3mn-CO-3mn-CO
Rated switching
sequence
Operating time
ms opening
50
breaking
65
closing
70
RI operating mechanism
power
supply
voltage
consumption
ACW)
DCN)
AC(VA)
DC(W)
50 Hz
60 Hz
16 12,5 16 25
40 31;5 40 63
16 12.5 16 25
50 50
65 65
70 70
50 50
65 65
70 70
electrical
closing
s ring
release
cEargmng
48 - 110 - 220 - 230
120 - 240
- - 110 - 125 - 220
390
180
390
65
opening
release
I 180
1 65
dimensions
H: height ............................................................1223mm
W: width ............................................................ 920mm
D: depth ...........................................................
1189.5mm
Distance between phases ..................................250mm
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