SLIMPAK G408-0001 signal isolator brand new stock

SLIMPAK G408-0001 signal isolator brand new stock

Technical data of product parameters

The setting of this ratio determines the sensitivity of the function
for detecting inrush.
Generally the ratio of 2nd harmonic to fundamental is greater
than 15 %. Allowing a margin to ensure that an inrush condition
is detected, a setting of 10 % is recommended.
Duration of active inrush detection G408-0001
The setting for how long the inrush detection function should be
active depends on how long the danger of false tripping due to
an inrush current, which only flows through one winding, exists.
A typical setting is 5 s.Factors a1, a2 and a3 facilitate compensating differences between the rated currents of protected unit and c.t’s.
The factors “a” are defined by the ratio of the c.t. rated current to
the reference current. G408-0001
In the case of a two-winding transformer, both windings have the
same rated power and the rated current of the transformer is
taken as the reference current. Providing the factor “a” is correctly set, all the settings for g, v, b, g-High and I-Inst are
referred to the rated current of the transformer and not to the
rated primary current of the c.t.The reference current is only chosen to be different from the
transformer rated current, if this should be necessary because of
the setting range of factors a1 and a2.
Differences between the rated currents of the c.t’s and a twowinding transformer may also be compensated by adjusting the
reference values of the A/D channels. In this case and assuming
the power ratings of the two windings to be the same, the factors
are set to a1 = a2 = 1. The reference values corresponding to
the above example are:the differential protection, whilst changing the reference values G408-0001
of the A/D channels effects the currents for the entire protection
system (all functions and measured variables).
The windings of a three-winding transformer normally have different power ratings and a reference power has to be chosen,
which is used for all three windings. All the settings of the protection are then referred to the reference currents calculated
from the reference power.

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