Eaton SVS/12, User Manual

Page: 95 / 138

SVS/12
994.530 G01 02 95
4.2.8 Self-resetting indicators, 630 A panels
1.
As an option, cable panels can be provided with a self-
resetting overcurrent indicator or short-circuit current
indicator.
Overcurrent indicator
The overcurrent indicator (10) signals an overcurrent
between 200 and 1000 A per phase, adjustable in steps of
200 A.
The indicator consists of a module with (see figure 1):

three signal-emitters (L1, L2 and L3), one for each
phase; these signal red when the preset response
value is reached.

a test and reset button (10a)

a built-in battery (lithium) for testing and resetting
Upon delivery the response value of the short-circuit
current is set to 200, 400, 600, 800 or 1000 A.
The automatic reset time can be set to 2 or 4 hours. This
means that the indicator automatically resets itself 2 or 4
hours after responding. Press the test and reset button to
reset it sooner.
Testing the self-resetting overcurrent indicator
The signal-emitters should be red when the test and reset
button is pressed. The signal-emitters should turn black
when the test and reset button is pressed again.
If the indicator is not working properly, the user should
contact Eaton Service.
Short-circuit current indicator
The short-circuit current indicator (10) signals a sudden
change of current (not overcurrent). Slow changes of
current, such as load fluctuations during the course of a
day, are not signalled.
Two conditions must be met in order for the indicator to
respond:
1. There must be a rapid change in the current that is
characteristic of a short-circuit current,
150 A <
∆i < 300 A.
2. The short-circuit current must be switched off after at
least 1 second, the current must be < 3A.
The indicator will only signal a short-circuit current if both
conditions are met.
The indicator consists of a module with (see figure 1):

three signal-emitters (L1, L2 and L3), one for each
phase; these signal red in the event of a short-circuit
current

a test and reset button (10a)

a built-in battery (lithium) for testing and resetting
The automatic reset time is set to 3 hours. This means that
the indicator automatically resets itself after 3 hours.