PICKUP - Vip 400

VIP400, VIP410 - Functions and Parameters
Operation of Setting Groups A and B (VIP410)

Phase protection integrates 2 setting groups for the I>, I>> and I>>> set points. Each set offers the
following settings:
 the choice of tripping curve (DT, IDMT, etc.)
 the set point setting
 the delay setting
The other possible phase protection settings are common to both setting groups (harmonic 2 restraint,
reset time, phase Cold Load Pick-Up). Setting group A applies by default.
The setting groups can be switched:
 from the keypad on the front panel. Refer to the Use section (see page 39).
 from the communication interface via a remote control order. Refer to the Communication section
(see page 143).
72 NRJED311206EN 03/2013
Settings
Setting the I> and I>> Set Points Authorized Values

Tripping curve The following values are authorized:
More information is available about the overcurrent  OFF: set point off
protection tripping curves (see page 82).  DT: definite time
 SIT/A: IEC/A standard inverse time
 LTI/B: IEC long time inverse
 VIT/B: IEC/B very inverse time
 EIT/C: IEC/C extremely inverse time
 MI/D: IEEE moderately inverse or IEC/D
 VI/E: IEEE very inverse or IEC/E
 EI/F: IEEE extremely inverse or IEC/F
 RI
I> or I>> set point DT curve 0.05...20 In
IDMT curve 0.05...2 In
Time delay DT curve 0.05...300 s in steps of:
 0.01 s, from 0.05 to 9.99 s
 0.1 s, from 10.0 to 99.9 s
 1 s, from 100 to 300 s
IEC, RI curves TMS: 0.02...2 (step: 0.01)

IEEE curves TD: 0.5...15 (step: 0.1)
Reset time Setting common to I>, I>> and Io> set points:
 OFF: reset time off
 ON: reset time on
Setting the I>>> Set Points Authorized Values

Tripping curve The following values are authorized:
 OFF: set point off
 DT: definite time
 INST: instantaneous set point (pick-up), refer to the second
note below.
I>>> set point INST or DT curve 0.1...20 In
Time delay DT curve 0.05...300 s in steps of:
 0.01 s, from 0.05 to 9.99 s
 0.1 s, from 10.0 to 99.9 s
 1 s, from 100 to 300 s
Phase Protection Harmonic 2 Restraint Settings Authorized Values

Activity  OFF: off
 ALL: action on I>, I>> and I>>>
 I>: action on I> only
 I>>: action on I>> only
 I>>>: action on I>>> only
 I> & I>>: action on I> and I>>
 I> & I>>>: action on I> and I>>>
 I>> & I>>>: action on I>> and I>>>
Second-harmonic set point 5...50% in steps of 1%
Minimum short-circuit current Iscmin In...25 kA
NOTE:
In is the phase CT primary rated current:
 In = 200 A for the CUa sensors
 In = 630 A for the CUb sensors
NOTE: The INST setting for the Io>> set point can only be accessed if the VIP is configured without a
minimum tripping time. This parameter setting is defined by customizing the VIP associated with the
circuit breaker (see page 137).
NRJED311206EN 03/2013 73
Sensitivity to Transformer Inrush Currents

When a transformer closes, the magnetizing currents can reach amplitudes, in peak values, of around 5
to 12 times the rated transformer current. These transient currents can be the source of nuisance tripping
of the ANSI 51 protection functions.
These inrush currents have a strong aperiodic component:
I
extrait de CT192
t
I(t) = I(0).e t
Measurement of the VIP currents is not affected by the presence of an aperiodic component (50 Hz or
60 Hz), which allows a significant reduction in the ANSI 51 protection function settings.
In instantaneous protection (ANSI 50), the I>>> set point should be set to at least 37% of the peak value
of the inrush current stated by the transformer manufacturer.
With delayed protection (ANSI 51), the same rule applies, taking account of the current attenuation
according to the time constant stated by the transformer manufacturer.
If the protection plan requirements impose settings that do not comply with the above rules, it is advisable
to activate the phase protection harmonic 2 restraint.
Settings for Using the Function

Compulsory settings in the protection menu:
 Network frequency selection (FREQUENCY screen)
 I> set point setting (I> 51 screen)
 I>> set point setting (I>> 51 screen)
 I>>> set point setting (I>>> 50-51 screen)
Additional settings in the protection menu:

 Use of the phase protection harmonic 2 restraint (PHASE H2 RES screen)
 For the VIP410: I>, I>> and I>>> set point settings for setting group B (SET GROUPS screen)
Additional settings in the parameters menu:

 Activation of the reset time (RESET TIME screen) This setting is common to the I>, I>> and Io> set
points.
 For the VIP410: Phase Cold Load Pick-Up setting (COLD LOAD I screen)
74 NRJED311206EN 03/2013

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VIP400, VIP410 - Functions and Parameters

Operation of Setting Groups A and B (VIP410)

Setting the I> and I>> Set Points Authorized Values

IEC, RI curves TMS: 0.02...2 (step: 0.01)

Setting the I>>> Set Points Authorized Values

Phase Protection Harmonic 2 Restraint Settings Authorized Values

Sensitivity to Transformer Inrush Currents

Settings for Using the Function

Additional settings in the protection menu:

Additional settings in the parameters menu:

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