Oscillography analysis

2008

1. Oscillography Analysis

a Jeco- INC,

2. IPSplot® PLUS Software
Features

Phasor & Time Domain Displays
Interpreting Data

Examples

3. Pre}
ax

Vene Lie
Ñ | ri em: a

4. All analog traces. This
view shows peak values.
RMS values may also be
displayed.

Controls for going to the
beginning or end of a
record, as well as nudging
forward or backward in
time in a record.

Zoom controls

Display controls for analog
traces, RMS traces,
fundamental waveform
display, frequency trace,
power trace, power factor
trace, phasor diagram,
impedance diagram and
power diagram.

Zsc

Marker #1

Marker #2

Time at Marker #1

Time at Marker #2
Control status input and
contact output traces
(discrete /O)

Scaling for each analog
trace. This can be set
automatically or manually
adjusted.

Date and timestamp for
record

Time of trip command
Time at Marker #1

Time at Marker #2

5. lex

ES re | vam Sang wed _ lala
A one O EC
Den m Kammer = ù x

rm É =

Ve 0 pets
Fran Marto
ra amen Hote
Sedan Mage
co tone Maya
"lama agrado O
ana
Fhe Coron
RENT ar PQ
Zoom
Zeon ot
re

vem 32

Toot

ES F

A | OMT

6. Drop down window for view selection, diagram selection and
zoom.

Delta value between Marker #1 and Marker #2
Value at Marker #1
Value at Marker #2

Scaling for each analog trace. This can be set automatically
or manually adjusted.

7. Bred
AE]

CURE 7 Wi 7 7
SU À À \
Reser À À À AA À

aro
AT 002
[ear aa

E ea a

ie pr

8. M-3311 Differential Function
Tripped when Generator
Breaker Closed
During Relay Commissioning

9. M3311 One Line

Winding 3

10. Target List
IPScom: Version V02.01.03
Relay: M3311/V01.05.00
Comments:

No. Date Time Event(s)

02-Jul-2005 09:37:08.000 1 (87T) Phase Differential Current - Phase B Operated
INPUTS: OUTPUTS: 1
W1 Currents: 1.36 A (A), 1.39 A (B), 1.44A (C)
W2 Currents: 0.03A (A), 0.05A (B), 0.04A (C), 0.00A (N)
W3 Currents: 0.82A (A), 0.81A (B), 0.83A (C), 0.01 A (N)

>>

11. Transformer Rating

67.2MVA
230kV / 13.8kV
Wye / Delta-ac

Wye connected CT's

Relay System Setup Screen

SETUP SYSTEM Aluleloteje)
Noms Fragunap: Sana] | CT. Secondan Rag 5A
Non Votage [120 ay al I Say
Wing Sec
@ Three windings Two Winding: sewn CW © c

rarstommev/CT Comectien 6

Tusntfomer Connection (41)

Standard © Custom

Translomer Cennacion [W2) Transtomer Cannactis (4)

M3311 One Line Das El mm =| a r
CT Connection (1) C.T.Cormection W2 CT Correction (US
F + Fr Y El
Winding 3 ie OTe
60:1
TrowAcive Siete E 5 = 3
M3311 bis @ Open © Open © Open © Open
© tows À Close (lus © Cie
VI Corligualon: CVA CMB CME OMAR CE
<] Pata AE CAS Rayon
Delta-ac our 1: [60
O VI xPhose Pato: [200-1 1001] + 165500 [
CT Wi Phase Rati [600 En 14 2165500
600:1 inding 2 [CT wePhaveRatia [600 En 120) few 4
Phase fate [D 1 1 || 5
600: E Winding 1 CT. W2 Ground ata; 7 1 14 Js E
mie = Aa E
CTWSGroudRain [1201 165500 le
eso fotos

Fe] _ toes

12. 87 Trip Oscillography

AVAL 200 2 = 3 = 1 =
BI 12? a > == =
TA 2e 0 FX

RAT m u ~ Ñ = ~ =
BZA 02 2

ES |
6214] 000 x

13. 87 Function Settings

(87) -PHASE DIFFERENTIAL CURRENT

Pickup]120 50pu 4 | r[200pu 87H
Delay]! 1 Cycle all] » [8160 Cycles
OUTPUT Blocking Input

a 7 ET Moi MAT a a ie E st MAT ST ai

Fikup[030 070pu_4 | rfi00pu 871

Peicent Slope #1 [40 5% 4 | + | 100%
Percent Slope 12 [100 5% 4 | + | 200%
Slope Break Point: [2 1.0pu, 4 »[40pu a
Even Harmonics Flestraint: Disable Enable F Enable w/cross average

(2nd. Ah) fig] 5% af | » [50%
Sth Harmonic Restiaint' (Disable @ Enable ( Enable w/cross average

20 5x4 + {50%
Pickup at SthH.A075 g10pu 4] + {2.00 p.u
OUTPUT Blocking Input

oss tiie} | a |

WT CT. Tap: TWO « » {10.00
W2CT. Tap 10p « 6/1000
wocT.Ten er teal | 10.00

14. Target List
IPScom: Version VO2.01.03
Relay: M3311/V01.05.00

67.2MVA Comments:
Wye / Delta-ac 02-Jul-2005 09:37:08.000 1 (87T) Phase Differential Current - Phase B Operated

‘OUTPUTS: 1
39A (B), 1.44A (C)

0.05 À (B), 0.04A (C), 0.00 À (N)
0.81 A (B), 0.83A (C), 0.01 À (N)

Wi Currents: 1.86 A (A),
W2 Currents: 0.03 A (A),

f
i
i

230kV / 13.8kV ! No. Date Time Event(s)
i
1
| W3 Currents: 0.82 A (A),
1

M3311 One Line

Tap3=2.81 Calculate Winding Tap Settings
Winding 3
a + Winding 1 Tap Winding 2 Tap Winding 3 Tap
A aan CTR = 600:1 CTR = 600:1 CTR = 60:1
WATT Tapt =67:3X1000 papo 67.3%1000 Tapg . 67.3x 1000
<] YYY 13.8 xV3x 600 13.8 xV3x 600 230 x/3 x 60
Delta-ac
600:1¢ | winding 2 de .
19 1 Phase A Current = 1.36A
Ol Tap? =470 Por Unit Cure = 1.364 Winding 1 Tap
600:1 E_Winding 4 Per Unit Current = 1.36 / 4.7 =
Tap! = 4,70

Winding 3 Phase A Current = 0.82A
Per Unit Current = 0.82A / Winding 3 Tap
Per Unit Current = 0.82A / 2.81 =

15. Winding 3 relay i it nt ij i
Lags Winding 1 relay input 87 Trip Phasor Diagram

current by 210 degrees

RES

Ba

A A DS A

TE 07

CEE

0
i Π4
à El 08 TT
RAA om Ir
0 42
Eee om ve
wa os am
y
TE] 7 7 A
PAPAS
16314] 000 T

128718 ms
7725 Cycles

16. M3311 Relay Application

Wye / Delta-ac Transformer M3311 One Line
High side currents lead low side
currents by 30 degrees

Winding 3

M3311

/ = 67.2MVA
230kV / 13.8kV <

Delta-ac
Resulting relay currents taking CT
polaritiy into account,
Winding 3 currents lag Winding 1

currents by 150 degrees IL

60:1 Winding 1

Iwi

Iw
150 degrees

600:1

Winding 2

17. Vector angle should
be 150 degrees

Iwi

150 degrees

Assume transformer is
actually a Delta -ab High
"LAGS" low by 30 degrees

E 30 degrees

Vector angle is
210 degrees

Phase Disgram
Phase
Phase [Maude

I: 037
163 04 0
163 am 17

Relay Currents

——>

Iwi

210 degrees

18. Actual Transformer 3-Line
Ta Ia-Ib

Ib-Ic

Ic Is Ic-Ia

Winding 3 Winding 1

| W3C = 0.82A

+——Ia-Ib

WIA = 1.370
W3C = 0.8242:60'

W3A = 0.82A/180° WiA =1.37AL30"

19. M3311 with Delta-ac Configuration

a wia
W3C = 0.82AZ-60
-wac a7 o \ 5
W3A = 0.82A/180 W1A =1.37AZ30
/ W3A - W3C
waa - wach
M-3311

| a

W3A = 0.82A/180° l'una=1.37a230

W3c = 0.82A/-60°| .

| o or S Tawi 4TAW24TAW3
Ta-Ic= 0.29puL30 + 0 + 0.29pu/150°

_0.29pu 180

- 0.29pu 4-60”

Ines = Taw Law2 +TAW3
2

le < 0.29pu + 0 + 0.29pu
2

|

|

|

|

| = 0.29pu/150°
i

|

|

L

20. M3311 with Delta-ab Configuration

W3B = 0.82A/ 60°

W3A = 0.82AZ180° Y W3A- W3B

W3A = 0.82A/180°

W3C = 0.82A260°

WiA

W3A- W3B
M-3311

| ci ro1re-S Taw «Dawe «Taws

s 0.29puL30 + 0 + 0.29pu/210°
pu /180°- 0.29pu Z60°
| = 0.29pu/210° tres -S Lawı <Lawe «Laws
L 2

\

WIA =1.37AZ30°

WIA =1.37AZ30°

21. Current was below 0.3 pu Pickup Setting
Was Trip Correct?
Why Only Phase B Differential?

Why not Phase A, B, and C?

22. M-3430
“40” Function Tripped Unit

23. 1000:1

88MVA
13.2kV

1000:1

M3430 Application One Line

1204

M-3430#1

M-3430#2

24. Oscillography

ES Fle View Settings Window Help le) xi
SD nm «oo AAA

AA TA DNA N AN TEE
vew 1073 e A Ir TAN TOUTE Un
A A TT
VE
BB 72 31 m AAN EA A ————_—— [
BA) 149 =
CA 977 Fe
NA ET) =
osc CN A UA Kf;
ER AAA UAT N
‘ «HN NO Ah a

flo
(1520.24 ms E

Ready

Date: 0712712004 Start Time: 14:53:08.477 [Tripped Time: 14:50:11,000 Maki: 14:63:09.979 | Mark2ı 14

25. Expanded Oscillography

ELLE = Helo MEE]
Ss Bu « » Aa AIR rs te FP pr| BE pa

VAN) 1563 > AR = = =

VEIT

vem 32

LC

BA 819

BA) 255

(CA) 572

INA] 000

ise] ar <a
ba) 247 mm Zr A
En m O SS

A

83.63 Cycles

26. Phasor Diagram

[E Fil) View Settings Window Help =/8) x)
Sen «> naar? P Pl EE PO
a E RES
Phasors:
Frese [Mame LA
a7 ae
Pen
wo!
E
Ib 352 78
le 357 160°
5.10 7 = a
LT ECC a EN 3 5 =
2 AR

L
Te “0.00
Lo:

ETS
9355 Cycles

27. PQ Plot

EN Fle View! Settings window! Help TES
| S| « » | @Q @ ar rs te + Pp pr|3 BE pol
vamı 1581 E ms un En = Ea

fan

200

155810 ms
83.55 Cycles

28. ES) rie visa Settings Window Help

3 naa» QQ |r ws it £ P | eE rol
vamı 1581 x
VE 3 =

Impedance Plot

impedanoe in ohms

8355 Cycles

ve) paa az aus
wm 17
AA 884 2
a ¥

BA 187
ICA) +0

200
IN) où
fe) Bm

400
be) 178
lets) 6.98

soo! Romy)

(ms) o 200 400 soo 200

155918ms

29. M-3430 “40” Function Setting (both relays)

(40) - LOSS OF FIELD

Circle Diameter: [18.0 0.1 Ohms 4 | »[100.0 Ohms #1
Offset:[-1.6_ | -50.0 Ohms 4 | »] 50.0 Ohms
Delay: [5 1 Cycle 4] | >| 8160 Cycles
. — Save
Voltage Control: — Enable © Disable
OUTPUT el. Blocking Input
89 77 60 57 47 37 27 1 [FLA 60 57 47 37 27 10 Con
Circle Diameter: [30.2 0.1 Ohms 4] | +] 100.0 Ohms #2
Offset: [-1.6 | -50.0 Ohms «| | >| 50.0 Ohms
Delay: [30 1 Cycle 4] ] >] 8160 Cycles
Voltage Control: — Enable © Disable
OUTPUT @ Blocking Input

ev 77 67 sr 47 37 27 1M | FLV 67 5 47 37 27100

Voltage Control: sv aj 200 v

@: WARNING, Function DISABLED until output

a!

30. 40 Function Settings
1.6 ohm

18 ohm, 5 cycle
Zone 2 = 30.2 ohm, 30 cycle

x
4

M-3430 Relay Loss of Field Operation

31. Was it a Correct Trip?

Zone 2 Time Delay was set at 30 cycles.
Why did it take 90 Cycles to Trip?

Why did only 1 Relay Trip?

32. M-3310 Differential Function
Tripped for
External Phase C Ground Fault

33. Iw2

150 degrees

Vas

150/200/250MVA
352KV / 15kV

Delta-ac

2400:1

IL

Line Relay 67G also tripped
M3310 Relay Application

Winding 1

Winding 2

Iw2

Phase C-g Fault

All CT's are wye

M3:

310

34. 87 Trip Oscillography

E rie ven Settings Window Hel lex
ES «rn iaa trastos Pro BE PO

A Ta

Bm oo

Ven 55 == alien =I = 7 7
MES EA —
ara

DORE

icra 337

jez >

RR 27

IC2(A) 1

Ex (me)

Ready

Date: 10/04/2004 [Start Time: 15:26:17.122 — [impped Time: 15:26:18.000 Mark 1: 15:26:16.002 Markz: 15:

35. Sequence Networks
Xe: xrı Xs1

NM} * AM ? O Nm
“6 lia ©

fre
fro

36. Auto Scale & Voltages Removed

Fle Wow Settings Window Help =isix
B/G) un «4» A Q AIA ats te FP Plo EPO
ITA) 00 7
16114) 000 ©
ICA) 007 a
16216) 000 7
TAZA) 000 i

WENN |
1024) 0m |
10218) 000 7

een
mi 0 m oo y Ta

00m
0.00 Cycles a
Ready Date: 10/04/2004 Start Time: 15:26:17.122 [Triped Tine: 15:26:18,000 Mark I: 15:26:17.122 — Mark2: 15:

37. Phasor Pre fault

Bir ve m - 1812
SS|u « » m|QaQ [jr mies Poor] BE ro]
WAT (6) 207 pe
BI) -5.60 ©
„| Phase Diagram. 4
co yl PF
Phase [Maude] Ange
: Ga 20 2
1624) 18 a vB 00 0
rc coo
mn 2 oa
CARRE 7
a nn ANS
z 12 148
162 (4] 525 x 182 20
ice 30 EA A
[EEE
Gel m i
77578 me
ass 8
Ready Date: 10/04/2004 [Start Time: 15:26:17.122 — [Trpped Time: 15:26:18,000 [Mark 1: 15:26:17,898 Mark2: 15:

38. Phasor Post fault

2] File View Settings Window Help lal x!
BS) Sl « me [| F msi $ P PF oy ES PO
Dn x
18118] E
. Él
TIRT am >
Arge]
: 55 e
1G2(8) -304 7 vB ao D
vc 99 Ov
N 03 1m
Ur >
La YAA SIP
2 142 550
IB2/(4] 0% x 182 22
Aie 74
ZA 30 of
© Eu
TES
11 Gycke

Ready Date: 10/04/2004 [Start Time: 15:28:17.122 — Tripped Time: 15:26:18,000 Mark I: 15:26:17.981 |Mark2: 15:

39. System Setup Screen

ETUP SYSTEM

87 Function Setup Screen

187). PHASE DIFFERENTIAL CURRENT
Prkun[S0 50pu t

BET
NoinelFrequeney: @He | CT. SecondayReinz 5A
sun ir Time Delay] 1 Cycle DEC
Nommavotage: [FS sv EL ND | Tanstomes Correción oureu Biking ut
= da a fe vor =] war res AA
Normal Curent (500 0504 +1 3 2604 one
Input Activa State. 6 5 43 2 7 Fee oa | shops er |
Gen Soe Com Com ee su o
ROR Cher ES BE SE IEEE Parents tele sx af | Dhoom
Configuration: © Line to Ground Line to Line Slope Bresk Poe [10 1.0pu 4 | cou
Even amener est Decio Enable © Enable as ae:
lotation: (ABC © ace ¡e

DCE 11
WT. W2 Ground Ratio: 10:1 1
Ph [201
W2 Phase Ratio [2400 1

(CT. W2 Ground eto: [7 1

=

c

(nth) fe wa | > je
SihHamonic Resta Diable @ Enable © Enable

ml al

foes average

Prkupal SHARIA 01094 a] |
OUTPUT
APA
METTRE 104 | Jo
WCT ef 104 | y 1000

Save

Cancel

40. 25

87 Slope Characteristic

20 PhaseA m TApitt=Wi(r a-ı c)+W21 a
PhaseB 0 IB Dift = W1(1 b- ra)+W2r b
PhaseC + ICDiff=Wi(x c-1 b)+W2x ©

41. Expanded Phase A Scale

[E] Fie View Settings Window Help =l8lxi
SSI « » [QQ | mis p P| erro]

AW 04

EE

CTA) 489 | Waveshape Suspicious
GA 0

BR 358

A 038

za 3

857 me H

11 Cycles a

Ready Date: 10/04/2004 Start Tine: 16:26:17.122 THppedTime: 15:26:18.000 [Mark 1: 15:26:17.901 Mark: 15:

42. Ea

SERRE

Phasor Expanded Phase A Scale

Q GIF ms in # P PF) o> EE PO

TATA) -054
ITA -085
icra) ans
Phase | Magritude | Angle
217 VA 6 18
16216] -302 vB 0 0
ve 00 0
12 (4) 354
182(4) 0%
IA 354
1857 ms ]
1.11 Cycles |
|
Ready Date: 10/04/2004 (Start Time: 15:26:17.122— [Tripped Timer 15:25:18,000 ¡Mark 1: 1s:26:17,081 — Mark Zi 15

43. Check Current Sum:TA + IB+Ic=-IG

Calculated IG = 15.19 /-143.6° 4 19.4 /-147.0°

IA + 1.97/11°4 12.66/ 43° =- 19.4£147°

IA = 5.3 /17.2°

44. Recalculated Differential Currents

Phase A

tr Tawıac) + LAW2

= 1.38pu/240° + 1.34puZ57

IRES -S1am (AC) + TAW2
2

= > 1.38pu + 1.34pu
2

Phase B

Toirr- STE + IBw2

s 0.58pu/-21.3°+ 0.55puZ25°

IRES -S1awien +IAW2
2

= = 0.58pu + 0 + 0.55pu
2

45. 25

87 Slope Characteristic

20 PhaseA m TApitt=Wi(r a-ı c)+W21 a
PhaseB 0 IB Dift = W1(1 b- ra)+W2r b
PhaseC + ICDiff=Wi(x c-1 b)+W2x ©

With Calculated W1a
Phase A E
PhaseB 0

0.5

46. Customer Confirmed Problem
Phase A CT