5-41
Location
Message Line
Description
S 9.1
SETPOINTS
VOLTAGE
The setpoints page 9 header. The 565 Relay can provide protection
against voltage related faults. In this page the voltage related setpoints are
entered.
Table 6-1 Phase Configuration for Voltage Alarms and Trips
VT CONNECTION
UNDERVOLTAGE
TRIP
UNDERVOLTAGE
ALARM
OVERVOLTAGE TRIP
OVERVOLTAGE
ALARM
WYE
ANY TWO
PHASE
ANY SINGLE
PHASE
ANY SINGLE
PHASE
ANY SINGLE
PHASE
OPEN DELTA
TWO MEASURED
PHASES
(Vab & Vbc)
ONE MEASURED
PHASE
(Vab OR Vbc)
ONE MEASURED
PHASE
(Vab OR Vbc)
ONE MEASURED
PHASE
(Vab OR Vbc)
S 9.2
VT CONNECTION
WYE
This message asks for the type of voltage transformer sensing which you
intend to use. There are three possible systems, as shown in wiring Figure
2.6. The choices for the setpoint are:
1. Wye.
2. Open Delta.
3. Delta/Wye
4. None
The Delta/Wye choice allows the 565/575 to measure secondary voltages
wired as Wye and display them as phase to phase quantities on the
primary side of a Delta/Wye connected transformer. Hence, selecting
Delta/Wye does not multiply the result by
√
3. For example:
In a 2.4 kV:120 V PT system (i.e. 120 V into the relay), WYE displays 2.4 kV
A-N, DELTA/WYE displays 2.4 kV A-B, NOT 2.4 kV
×
√
3.
If none is selected, voltage sensing will be disabled.
Refer to your system specifications or one line diagram to determine which
your system is. Use the NEXT CHOICE key to select the appropriate one
and press the STORE Key to save the new value.
Only message S 9.21 will appear if the VT connection is selected as NONE in message S 9.2.
S 9.3
VT NOMINAL SEC
VOLTS 120 VOLTS
The voltage transformer which you are using to sense voltage may operate
at various secondary voltages depending on the sensing system used.
The 565/575 has the ability to be programmed for the desired secondary
rating, which should be the rated secondary voltage stamped on the
transformer’s nameplate. This will be the phase to neutral voltage for a Wye
system, or a phase to phase voltage for an Open Delta system. The range
is from 48 to 240 V in steps of 0.1 V.
S 9.4
VT PRIMARY VOLTS
1.20 kV
The primary voltage of the VT which monitors the feeder is entered here.
This is the “nameplate” primary voltage. The voltage transformer primary
rating range is from 0.10 to 69 kV in steps of 0.01 kV.
S 9.5
ZERO VOLTS
DETECT ENABLED
When enabled, this setpoint allows undervoltage alarms and trips to occur
with the 565/575 reading all phase voltages as zero. For the 565/575, zero
is when the voltage is below 48% of the nominal rating. When disabled, all
phases reading below 48% are considered a normal no voltage condition.
Thus, no alarms or trips will be declared. As always, undervoltage trips
SETPOINTS MODE - VOLTAGE
Содержание 565
Страница 6: ...INSTALLATION 2 2 Figure 2 1 Mounting Details ...
Страница 7: ...INSTALLATION 2 3 Figure 2 2 Mounting Arrangement with Relay Collar ...
Страница 12: ...INSTALLATION 2 8 Figure 2 5 565 Relay Typical Wiring ...
Страница 13: ...INSTALLATION 2 9 Figure 2 6 Voltage Sensing Wire ...
Страница 14: ...INSTALLATION 2 10 Figure 2 7A 565 with MTM CT and Open Delta VT Typical Wiring ...
Страница 15: ...INSTALLATION 2 11 Figure 2 7B 565 with MTM CT and Wye VT Typical Wiring ...
Страница 16: ...INSTALLATION 2 12 Figure 2 8A Open Delta VT and CT MTM Typical Wiring ...
Страница 17: ...INSTALLATION 2 13 Figure 2 8B Wye VT and CT MTM Typical Wiring ...
Страница 18: ...INSTALLATION 2 14 Figure 2 9 MTM Mounting Dimensions ...
Страница 19: ...INSTALLATION 2 15 Figure 2 10 565 Rear Panel Layout ...
Страница 20: ......
Страница 23: ...DISPLAY AND KEYBOARD 3 3 Figure 4 1 565 Relay Front Panel ...
Страница 28: ......
Страница 132: ......
Страница 142: ...CURVE INFORMATION ANDTABLES 7 10 Figure 7 9 IEC A Curves ...
Страница 143: ...CURVE INFORMATION ANDTABLES 7 11 Figure 7 10 IEC B Curves ...
Страница 144: ...CURVE INFORMATION ANDTABLES 7 12 Figure 7 11 IEC C Curves ...
Страница 176: ...RELAYTESTING 8 2 Figure 8 1 Secondary Injection Test Setup ...
Страница 180: ......
Страница 184: ......
Страница 192: ...APPENDIX C C 2 Figure C1 System Controller Block Diagram 1 2 ...
Страница 193: ...APPENDIX C C 3 Figure C2 System Controller Block Diagram 2 2 ...
Страница 194: ......
Страница 198: ......