Seg WIC1 User Manual

◦ With option »Reset Mode« = “inverse time” (only available for IEC and◦
ANSI/IEEE curves): The reset delay is calculated based on the selected
characteristics.
• tChar (for all characteristics except “DEFT”):•
◦ Time multiplier/tripping characteristic factor. The setting range depends on the◦
selected tripping curve.
◦ Setting via [Protection Para / I>] »tChar«◦
For all inverse-time characteristics (i. e. all curves except the DEFT), there are two minimum
trip delays, and independent of the selected characteristic will the actual trip delay never be
smaller than any of these two minimum delays.
• »I> . tMin« is a minimum delay settable by the user. So, this is simply a timer that•
is triggered independent of the inverse-time curve and that has to elapse before
the protection stage trips. If it is set to 0 seconds it is deactivated. (See also ╚═▷
“4.3.2.1 Phase Overcurrent Protection – Settings via DiggiMEC or via Smart view”.)
• Another minimum delay, t
Dyn.Lim.
, results from a calculated “knee-point” of the•
characteristic. This means it is dependent on a particular current value on the curve,
I
Dyn.Lim.
. The e󰊞ective trip delay does never fall below t
Dyn.Lim.
, independent of the
actual value of I.
◦ I
Dyn.Lim.
is de󰊟ned as the smallest value out of 20⋅In and 20⋅I
>
(EF Curve:◦
30⋅I
>
).
◦ Then t
Dyn.Lim.
is the delay time that is calculated from this I
Dyn.Lim.
based on◦
the selected characteristic.
◦
(The diagram of each characteristic curve shows this “knee-point”, assuming
◦
the example value I
Dyn.Lim.
= 20⋅I
>
[EF Curve: 30⋅I
>
].)
272 WIC1 WIC1-1.0-EN-MAN
11 Appendix
11.2.1 Characteristics (I>, I>>, I>>>)

Seg WIC1 Specifications

General

Brand	Seg
Model	WIC1
Category	Relays
Language	English