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Application
The
short circuit indicator type SFA is particularly suitable for
compact-switchgears. It is used in medium voltage radial networks with
one input.
The fault is indicated via LEDs. The
indication is reset in the following ways:
a) manually
b) after an adjusted reset time.
The instrument is equipped with a setting for minimum impulse duration.
The remote reset can be accomplished as a permanent contact (standard)
or as a selfwiping contact (on special request). The contacts are
potential-free.
The reading instrument of
the short circuit indicator
type SFA is available as a panel-mounted instrument.
The design of the reading instrument is the same for every switchgear.
Only the sensors are adapted to the specific type of switchgear. |
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General Description
This
short circuit indicator needs a lithium battery for power supply. After
the short circuit has occured, the indication will stay active until:
a) it is reset manually.
b) it resets after the adjusted time.
The required reset time can be adjusted on site. There are four reset
times available. (By request, 8 times can be programmed.) The short
circuit indicator is equipped with a setting for minimum impulse
duration. The times 40 / 60 / 80 / 160 ms can be chosen; they are
adjustable on site.
Every instrument has specific trip currents which are preadjusted.
Standard adjustments: 200 / 400 / 600 / 800 / 1000 A
Each of these trip currents can be adjusted on site via DIP-switches.
(Other values for trip current are available for extra charge.) The
remote reset can be adjusted either as a permanent contact or as a
self-wiping contact.
The closing time of the self-wiping contact can be adviced when
ordering.
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switchgear
make |
switchgear
type |
Dimension |
Order-No. |
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Ormazabal
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GC
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85 mm ø
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34.50.05 |
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Ormazabal
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GA; GE
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96 x 96 mm
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34.50.06 |
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AREVA
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FBA
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92 mm ø
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34.51.03 |
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AREVA
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FBX
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sensor with
cable length 1,0 mtr.
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34.51.04
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ABB
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SafeRing
SafePlus
RGC
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sensor with
cable length 0,90 mtr.
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34.53.04
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sensor with
cable length 1,00 mtr.
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34.53.05
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sensor with
cable length 1,1 mtr.
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34.53.06 |
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Siemens
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8DJ
/ 8DH
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95
mm ø
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34.54.03 |
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Schneider
Electric
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RM6
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80 mm ø
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34.55.03 |
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Eaton -
Holec
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SVS
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85
mm ø
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34.57.03
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Neutral
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assembly
on
cable
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sensor
cable--ø 20 - 40 mm
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34.11.12 |
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sensor
cable--ø 40 - 65 mm
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34.11.13
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Order
Data
Short Circuit Indicator
type SFA
type of switchgear: _______
Order-No.:
_______
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