P92x/EN FT/E11
Technical Guide
User Guide
Page 46/110
MiCOM P921-P922-P923
10.4
Negative sequence overvoltage protection (MiCOM P922 and P923)
The relay will trip according to an inverse characteristic or a definite time
characteristic for the first stage and according to a definite time characteristic for the
second stage.
The inverse characteristic is given by the following formula :
t = K / (M - 1)
Where,
K = Time Multiplier Setting
t = operating time in seconds
M = Applied input voltage / Relay setting voltage (Vs).
To gain access to the “NEG SEQ O/V” sub-menu from the default display, press
2
once,
6
4 times,
2
once and
6
3 times.
[47] NEG SEQ O/V
Heading of the “NEG.SEQ O/V” menu
[47] V2>=
NO
Description :
configuration of the 1
st
stage(V2>)
Range :
YES/NO
Note :
if disabled (« NO » selected), all the following messages
are invisible, until « V2>> » message.
[47] V2>=
5.0 V
Description :
setting of the 1
st
stage
Range :
range 57-130V :
5 – 200V, step = 0.1V
range 220-480V :
20 – 720V, step = 0.5V
[47] DELAY TYPE =
DMT
Description :
selection of the time delay characteristic
Range :
definite time (DMT) / inverse definite time (IDMT)
[47] TMS=
1.0
Description :
time multiplier setting.
Range :
0.5 – 100, step = 0.5
Note :
this message only seen if “IDMT” time delay selected
[47] tRESET V2>=
10 ms
Description :
reset time for the first negative overvoltage stage
Range :
0 – 100s, step = 0.01s
Note :
this message only seen if “IDMT” time delay selected
[47] tV2>=
40 ms
Description :
time delay setting for a definite time curve.
Range :
0 – 599s, step = 0.01s
Note :
this message only seen if “DMT” time delay selected
[47] V2>>=
NO
Description :
configuration of the 2
nd
stage(V2>>)
Range :
YES/NO
Note :
if disabled (« NO » selected), all the following messages
are invisible, until the heading of the sub-menu.
[47] V2>>=
5.0 V
Description :
setting of the 2
nd
stage
Range :
range 57-130V :
5 – 200V, step =0.1V
range 220-480V :
20 – 720V, step = 0.5V
[47] tV2>>=
40
ms
Description :
time delay setting for the definite time curve.
Range :
0 – 599s, step = 0.01s
Note :
definite time delay only for this stage
Summary of Contents for MiCOM P921
Page 1: ...MiCOM P921 P922 P923 Voltage and Frequency Relays Technical guide P92x EN T E11...
Page 2: ......
Page 4: ...P92x EN T00 E11 Technical Guide Content Page 2 2 MiCOM P921 P922 P923 BLANK PAGE...
Page 5: ...Technical Guide Px2xx EN SS A11 SAFETY SECTION SAFETY SECTION...
Page 6: ......
Page 8: ...Px2xx EN SS A11 Technical Guide SAFETY SECTION Page 2 6 BLANK PAGE...
Page 12: ...Px2xx EN SS A11 Technical Guide SAFETY SECTION Page 6 6 BLANK PAGE...
Page 13: ...Technical Guide P92x EN GS E11 MiCOM P921 P922 P923 aBCD Getting Started...
Page 14: ......
Page 16: ...P92x EN GS E11 Technical Guide Getting Started Page 2 18 MiCOM P921 P922 P923 aBCD BLANK PAGE...
Page 33: ...Technical Guide P92x EN CO E11 MiCOM P921 P922 P923 aBCD Connection Diagrams...
Page 34: ......
Page 45: ...Technical Guide P92x EN TD E11 MiCOM P921 P922 P923 Technical Data...
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Page 50: ...P92x EN TD E11 Technical Guide Technical Data Page 4 30 MiCOM P921 P922 P923 BLANK PAGE...
Page 76: ...P92x EN TD E11 Technical Guide Technical Data Page 30 30 MiCOM P921 P922 P923 BLANK PAGE...
Page 77: ...Technical Guide P92x EN FT E11 MiCOM P921 P922 P923 User Guide...
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Page 258: ...P92x EN CT E11 Technical Guide Courier Database Page 68 118 MiCOM P921 P922 P923 BLANK PAGE...
Page 296: ...P92x EN CT E11 Technical Guide Courier Database Page 106 118 MiCOM P921 P922 P923 BLANK PAGE...
Page 298: ...P92x EN CT E11 Technical Guide IEC 60870 5 103 Page 108 118 MiCOM P921 P922 P923 BLANK PAGE...
Page 308: ...P92x EN CT E11 Technical Guide IEC 60870 5 103 Page 118 118 MiCOM P921 P922 P923 BLANK PAGE...
Page 309: ...Technical Guide P92x EN IN E11 MiCOM P921 P922 P923 abcd Installation...
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Page 312: ...P92x EN IN E11 Technical Guide Installation Page 2 10 MiCOM P921 P922 P923 abcd BLANK PAGE...
Page 319: ...P92x EN IN E11 Technical Guide Installation Page 10 10 MiCOM P921 P922 P923 abcd BLANK PAGE...
Page 320: ...Technical Guide P92x EN CM E11 MiCOM P921 P922 P923 abcd Commissioning Guide...
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Page 351: ...Technical Guide P92x EN RS E11 MiCOM P921 P922 P923 Test Report...
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Page 354: ...P92x EN RS E11 Technical Guide Test Report Page 2 22 MiCOM P921 P922 P923 BLANK PAGE...
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