Reles de Proteccion T60 & T35
Reles de Proteccion T60 & T35
Reles de Proteccion T60 & T35
UR T60: INTRODUCTION
Introduction:
Multifunctional digital relay for transformer
protection:
Configurable multi-protection transformer package
Up to 4 sets of CTs and/or VTs (T60) Optional 5/6
windings
Up to 6 sets of CTs and/or VTs (T35)
Programmable FlexLogic
GOOSE and Direct I/O messaging
Easy access through HMI(Human Machine Interface)
Easy for monitoring and control PC program
Varieties of communications
GE Consumer &
Industrial
Multilin
UR T60 : FEATURES
Protections:
UR T60 : FEATURES
Controls:
Six Setting Groups
Digital Elements
Digital Counters
Selector Switch
Synchcheck (optional)
Inputs/Outputs
UR T60 : FEATURES
GE Consumer &
Industrial
Multilin
Wye
Delta
Wye
Wye
GE Consumer &
Industrial
Multilin
I1
I2
*
*
*
*
i2 sec
i1 sec
T60
transformer primary
currents phase A
i1 sec
T60
*
i2 sec
CT secondary currents,
when connected to the
relay phase A
i2 sec
-30
I1
I2
i1 sec
-210
GE Consumer &
Industrial
Multilin
STEP 1. CT inputs
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
-IB(-300 deg.)
- IA(-180 deg.)
ABC rotation:
IA(0 deg.)
ib(-150)
IB(-120 deg.)
ia(-30 )
- IC(-60 deg.)
Compensated WYE
and DELTA
secondary currents
IC'
IC'
ib'(-300)
ib'(-330)
ia'(-210)
-210 deg.
IA'
IB'
IA'
ia'(-180)
IB'
ic'(-60)
ic'(-90)
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
Irated(w1)= MVA/(kV(w1)* 3)
Irated(w2)= MVA/(kV(w2)* 3)
2.
3.
4.
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
COMPENSATED CURRENTS:
I1COMP = C1*M1(w1)*(I1SEC/CT1RATIO)
I2COMP = C2*M2(w2)*(I2SEC/CT2RATIO) where,
C1, C2 - phase shift coefficients ( C = 1 for the phase reference
winding)
M1, M2 - magnitude coefficients ( M = 1 for the magnitude
reference winding)
DIFFERENTIAL SIGNAL:
d iffe re n tia l
S2
S1
A
B1 B2
restraining
GE Consumer &
Industrial
Multilin
d iffe re n tia l
S2
S1
A
B1 B2
restraining
GE Consumer &
Industrial
Multilin
NO TRIP
NO
S2
Id > PKP
S1
YES
Ir < B1
NO
YES
NO
B1 < Ir < B2
Min. PKP
B1
Id/Ir%>S1
B2
Ir, pu
NO
YES
Id/Ir,% >S1&S2
YES
YES
NO
Ir > B2
Id/Ir, % >S2
YES
TRIP
NO
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
DIFFERENTIAL SIGNAL:
Removal of the zero sequence component from the differential signal:
optional for delta-connected windings
enables to cope with in-zone grounding transformers and in-zone
cables with significant zero-sequence charging currents
Removal of the decaying dc component
Full-cycle Fourier algorithm for measuring both the differential
current phasor and the second and fifth harmonics
RESTRAINING SIGNAL:
Removal of the decaying dc component
Full-cycle Fourier algorithm for measuring the magnitude
Maximum of principle used for deriving the restraining signal from
the terminal currents.
GE Consumer &
Industrial
Multilin
Full DC offset
TDC = 67 ms
Light CT saturation on fault current with
full DC offset
Ext2_PhA_Sat
Series1
Id/Ir, %
90
80
70
Id, pu
60
S2
Id/Ir =0. 57
Id/Ir = 0
50
40
30
20
10
S1
1361
1276
1191
1106
936
1021
851
766
681
596
511
426
341
Ir, pu
256
B2
171
B1
86
Min. PKP
Sample #:
GE Consumer &
Industrial
Multilin
Ext9_Sat
Series1
Id/Ir, %
60
50
Id, pu
40
S2
Id/Ir =0. 5
Id/Ir = 0
30
20
10
S1
1061
955
1008
902
849
796
743
690
637
584
531
478
425
372
319
266
213
Ir, pu
160
B2
107
B1
54
Min. PKP
Sample #:
GE Consumer &
Industrial
Multilin
Ext6_Sat_phB
Id/Ir, %
B2
1137
995
924
853
782
711
640
569
498
1066
Ir, pu
427
B1
356
S1
Min. PKP
285
Id/Ir = 0
214
Id/Ir =0. 87
143
S2
72
Id, pu
100
90
80
70
60
50
40
30
20
10
0
Sample #:
GE Consumer &
Industrial
Multilin
Adaptive
Adaptive 2-nd
2-nd harmonic
harmonic
Traditional
Traditional 2-nd
2-nd harmonic
harmonic
Per-Phase
Per-Phase
2-out-of-3
2-out-of-3 (Cross-Phase)
(Cross-Phase)
Average
Average
GE Consumer &
Industrial
Multilin
Per phase
2-out-of-3
Average
GE Consumer &
Industrial
Multilin
selected
harmonic
mode
Inhibit Percent
Differential
Operation
selected
inhibit
mode
FlexLogic
operands
Average
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
When the differential current on all three phases is above 0.04pu during energization,
the denominator is equal 3.
%2
nd harmonic
%2nd(phA)+%2nd(phB)+%2nd(phC)
3
If the differential current on one phase drops below 0.04pu earlier than the other two phases
During energization, the denominator is automatically decreased from 3 to 2.
%2nd harmonic =
%2nd(phB)+%2nd(phC)
2
If the differential currents on two of the phases drop below the cutoff value of 0.04pu, the
denominator is decreased from 3 to 1.
%2
nd harmonic
2nd(phC)
1
GE Consumer &
Industrial
Multilin
Sample
magnetizing
Sample(a)
magnetizing
inrush
inrushcurrent
current
1500
1000
500
-400
I2 /I
10
11
Time (cycles)
(b)
Second
Secondharmonic
harmonic
ratio
ratio
0.8
0.6
0.4
0.2
0
10
Time (cycles)
GE Consumer &
Industrial
Multilin
Differential current
Fundamental
phasor
2nd harmonic
phasor
Solution:
Solution:
II22
II22
II21
arg
I
arg
I
arg
I
arg
I
2
1
j
t
21
2
1
j
t
II11
II11ee
GE Consumer &
Industrial
Multilin
Effective
restraint
Isochrone
Isochronecontours,
contours,cycles
cycles
0.25
0.25
0.2
0.2
I / I (imaginary)
I22/ I11(imaginary)
0.15
0.15
0.1
0.1
4
4
5
5
-0.05
-0.05
2
2 44
00
0.1
0.1
0.05
0.05
-0.1
-0.1
33
-0.15
-0.15
-0.2
-0.2
-0.25
-0.25
-0.2
-0.2
-0.1
-0.1
00
I2I / /I1I (real)
(real)
2
0.1
0.1
0.2
0.2
0.3
0.3
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
2-nd hrmc=9.9%
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
T60
T60 Instantaneous
Instantaneous Differential
Differential Protection
Protection
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
Restricted
Restricted Ground
Ground Fault
Fault (RGF)
(RGF) protection
protection
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
S lope
Min. PKP
I = max( IR1, IR2, IR0 ), pu
IB
IC
IG
Igd
Igr
Igr currents starts decaying and will reach
50% of its initial magnitude after 15.5 cycles
GE Consumer &
Industrial
Multilin
GE Consumer &
Industrial
Multilin
T60
T60 Benefits
Benefits of
of Source
Source configuration
configuration and
and
some
some useful
useful applications
applications
GE Consumer &
Industrial
Multilin
Some
Some useful
useful Percent
Percent Differential
Differential tests
tests
GE Consumer &
Industrial
Multilin
Website:
http://www.geindustrial.com/cwc/products?pnlid=6&famid=31&catid=213&id=t60&typeId=9&lang=en_US
GE Consumer &
Industrial
Multilin
Ia(f)=1 pu @ 0 deg.
IA(f)=0.577 pu @ 0 deg.
A
Fault
Ib(f)=0
IB(f)=0 pu
B
C
Ic(f)=0
Diagram 1
GE Consumer &
Industrial
Multilin
UR T60/T35
Good
Good Luck
Luck !!
GE Consumer &
Industrial
Multilin