0
M
max
- V/Hz>
M
max
tMin
V/Hz>
E
max
E (only if f = fr = const)
1800
inverse delay law
overexcitation
under -
excitation
delay in s
IEC09000114-1-en.vsd
Overexcitation M-V/Hz>
Excitation M
M=V/Hz>
IEC09000114 V1 EN
Figure 99:
Restrictions imposed on inverse delays by
A definite maximum time of 1800 seconds is used to limit the operate time at low
degrees of overexcitation of
V/Hz>
. Inverse delays longer than 1800 seconds will not
be allowed. In case the inverse delay is longer than 1800 seconds, OEXPVPH trips
tMax
A definite minimum time
(tMin)
, can be used to limit the operate time at high degrees
of overexcitation for
V/Hz>
. In case the inverse delay is shorter than
tMin
, OEXPVPH
function trips after
tMin
seconds.
1MRK 504 135-UEN A
Section 9
Voltage protection
227
Technical manual
Содержание ret650
Страница 1: ...Relion 650 series Transformer protection RET650 Technical manual ...
Страница 2: ......
Страница 40: ...34 ...
Страница 62: ...56 ...
Страница 84: ...78 ...
Страница 208: ...202 ...
Страница 353: ...Table 236 Gray code conversion IEC06000523 V1 EN 1MRK 504 135 UEN A Section 12 Control 347 Technical manual ...
Страница 376: ...370 ...
Страница 414: ...408 ...
Страница 530: ...524 ...
Страница 562: ...556 ...
Страница 620: ...614 ...
Страница 668: ...662 ...
Страница 669: ...663 ...