5-202
G30 Generator Protection System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
Figure 5–87: VOLTS PER HERTZ SCHEME LOGIC
The element has a linear reset characteristic. The reset time can be programmed to match the cooling characteristics of the
protected equipment. The element will fully reset from the trip threshold in
VOLTS/HZ T-RESET
seconds. The V/Hz element
may be used as an instantaneous element with no intentional time delay or as a Definite or Inverse timed element.
The characteristics of the inverse curves are shown below.
DEFINITE TIME:
For the definite time curve, T(sec.) = TD multiplier. For example, setting the TD multiplier to 20 results a time delay of 20
seconds to operate when above the Volts/Hz pickup setting. Instantaneous operation can be obtained the same way by set-
ting the TD multiplier to “0”.
INVERSE CURVE A:
The curve for the volts/hertz inverse curve A shape is derived from the formula:
(EQ 5.49)
where:
T
= Operating Time
TDM = Time Delay Multiplier (delay in seconds)
V
= fundamental RMS value of voltage (pu)
F
= frequency of voltage signal (pu)
Pickup
= volts-per-hertz pickup setpoint (pu)
SETTING
SETTINGS
FLEXLOGIC OPERANDS
SETTING
SETTING
VOLTS/HZ 1
FUNCTION:
VOLTS / HZ 1
TD MULTIPLIER:
VOLTS / HZ 1
T-RESET:
VOLTS / HZ 1
CURVE:
VOLTS / HZ 1
PICKUP:
VOLTS PER HERTZ 1 PKP
VOLTS PER HERTZ 1 DPO
VOLTS PER HERTZ 1 OP
VOLTS/HZ 1 BLOCK:
Off = 0
Enabled = 1
VOLTS/HZ 1
SOURCE:
VOLT / Hz
RUN
AND
t
V/Hz
828003A7.CDR
VOLTS / HZ 1
VOLTAGE MODE:
T
TDM
V
F
----
Pickup
⁄
2
1
–
-------------------------------------------------
when
V
F
----
Pickup
>
=
Содержание G30
Страница 10: ...x G30 Generator Protection System GE Multilin TABLE OF CONTENTS ...
Страница 30: ...1 20 G30 Generator Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 414: ...5 274 G30 Generator Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 456: ...8 2 G30 Generator Protection System GE Multilin 8 1 DIRECTIONAL PRINCIPLE 8 THEORY OF OPERATION 8 ...
Страница 470: ...9 14 G30 Generator Protection System GE Multilin 9 1 SETTING EXAMPLE 9 APPLICATION OF SETTINGS 9 ...
Страница 484: ...11 12 G30 Generator Protection System GE Multilin 11 6 DISPOSAL 11 MAINTENANCE 11 ...
Страница 512: ...A 28 G30 Generator Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 620: ...B 108 G30 Generator Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 666: ...E 10 G30 Generator Protection System GE Multilin E 1 IEC 60870 5 104 APPENDIX E E ...
Страница 678: ...F 12 G30 Generator Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Страница 687: ...GE Multilin G30 Generator Protection System H 7 APPENDIX H H 2 ABBREVIATIONS H Z Impedance Zone ...