APPENDIX
379
8.2 APPENDIX A2 - PROTECTION FUNCTIONS
Standard Protective & control elements
SW Pack optional configuration
Protection function Work in Progress
21 Distance relay
24 Overflux (V/Hz)
25 Synchrocheck
26 Pt100 thermal probes
27 Undervoltage
27V1 Positive sequence undervoltage
27H-59H 100% stator earth-fault with 3
rd
harmonic
32P Directional active overpower
32Q Directional reactive overpower
37 (L - H) Undercurrent (Side L - Side H)
37P Directional active underpower
37Q Directional reactive underpower
40(M/G) Loss of excitation
46(L - H) Negative sequence overcurrent (Side L - Side H)
46(M/G) Negative sequence overcurrent
I2/I1 (L - H) Negative/positive sequence current ratio (Side L - Side H)
47 Phase reversal
49(L -H) Thermal image (Side L - Side H)
49(M/G) Thermal image
50/27 Inadvertent energigization
50/51 (L - H) Phase overcurrent (Side L - Side H)
50N/51N/87NHIZ .1* Residual overcurrent/Restricted earth fault
50N/51N/87NHIZ .2* Residual overcurrent/Restricted earth fault
50N/51N (L - H) Calculated residual overcurrent (Side L - Side H)
51LR(48)/14 Locked rotor
51V Phase overcurrent voltage restrain
55 Minimum power factor
59 Overvoltage
59N Residual overvoltage
59V2 Negative sequence overvoltage
64F Rotor earth fault
64REF Low impedance restricted earth fault
66 Maximum number of starting
67(Volt. Cons.) Phase directional overcurrent
67N Ground directional overcurrent
67N(Comp) Ground directional overcurrent with calculated
residual current
78 Out of step
DPHI Vector jump
81O/81U Overfrequency and underfrequency
81R Frequency rate of change
87G-87M/87T Double slope biased differential for generator/motor/transformer
2nd -REST (L -H) Second harminic restrain (Side L - Side H)
BF (L - H) Circuit breaker failure (Side L - Side H)
74VT VT supervision
74CT (L- H) CT supervision (Side L - Side H)
74TCS(L H) Trip circuit supervision (Side L - Side H)
86 Lock-out
ArcFlash ArcFlash
U
L1
, U
L2
, U
L3
I
L1-H
, I
L2-H
, I
L3-H
I
L1-L
, I
L2-L
, I
L3-L
U
E
U
E
U
EC
U
E
U
EC
I
ECH
I
ECH
I
ECL
74CT
81U
50/51
81O
59
27V1
27
40
51V
46
49
47
37P/Q
37
21
87G 87T
59V2
74TCS
BF
I
E-1
26
* *
52
G
64REF
U
EC
I
ECH
I
ECL
50N/51N(Comp)
I
E-2
50N.2/51N.2
87NHIZ
50N.1/51N.1
59N
67N
67N(Comp)
74VT
74CT
50/51
I
ECH
I
ECL
I
L1-L
, I
L2-L
, I
L3-L
I
L1-H
, I
L2-H
, I
L3-H
74VT
81U
81O
59
27V1
27
46
49
55
37P/Q
37
32P
87M
59V2
74TCS
26
52
M
40
51LR
50/51
66
74CT
74CT
BF
U
L1
, U
L2
, U
L3
U
E
U
E
U
EC
59N
*
87NHIZ
I
E2
I
ECH
I
ECL
50N/51N(Comp)
U
E
U
EC
67N
U
E
U
EC
I
ECH
I
ECL
67N(Comp)
50N.2/51N.2
50/51
12
12
24
24
25
25
50/27
67
67
64F
78
64F
78
81R
81R
XMR-D
XMR-D
86
86
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021
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