t
TD
V
Vpickup
Vpickup
=
⋅
⋅
−
>
>
−
−
480
32
0 5
0 035
.
.
ANSIEQUATION2287 V2 EN
(Equation 32)
The type C curve is described as:
t
TD
V
Vpickup
Vpickup
=
⋅
⋅
−
>
>
−
+
480
32
0 5
0 035
.
.
ANSIEQUATION2288 V2 EN
(Equation 33)
The highest phase (or phase-to-phase) voltage is always used for the inverse time delay
integration, see
. The details of the different inverse time characteristics are
"Inverse time characteristics"
en05000016_ansi.vsd
Voltage
Inverse Time Voltage
Time
VA
VB
VC
ANSI05000016 V1 EN
Figure 53:
Voltage used for the inverse time characteristic integration
A TRIP requires that the overvoltage condition continues for at least the user set time
delay. This time delay is set by the parameter
t1
and
t2
for definite time mode (DT) and
by selected voltage level dependent time curves for the inverse time mode (TOV). If
the PICKUP condition, with respect to the measured voltage ceases during the delay
time, the corresponding PICKUP output is reset.
Section 8
1MRK 505 277-UUS C
Voltage protection
134
Technical Manual
Summary of Contents for REB650
Page 1: ...Relion 650 series Busbar protection REB650 ANSI Technical Manual ...
Page 2: ......
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Page 437: ...IEC12000585 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 431 Technical Manual ...
Page 438: ...IEC12000586 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 432 Technical Manual ...
Page 439: ...IEC12000587 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 433 Technical Manual ...
Page 440: ...IEC12000588 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 434 Technical Manual ...
Page 441: ...IEC12000589 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 435 Technical Manual ...
Page 442: ...IEC12000590 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 436 Technical Manual ...
Page 443: ...IEC12000591 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 437 Technical Manual ...
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