Function
IEC 61850
IEC 60617
ANSI
Transient/intermittent earth-fault
protection
INTRPTEF
Io> -> IEF
67NTEF/NIEF
Harmonics-based earth-fault
protection
HAEFPTOC
Io>HA
51NH
Negative-sequence overcurrent
protection
NSPTOC
I2>M
46M
Phase discontinuity protection
PDNSPTOC
I2/I1>
46PD
Residual overvoltage protection
ROVPTOV
Uo>
59G/59N
Three-phase undervoltage protection PHPTUV
3U<
27
Three-phase overvoltage variation
protection
PHVPTOV
3Urms>
59.S1
Three-phase overvoltage protection
PHPTOV
3U>
59
Positive-sequence overvoltage
protection
PSPTOV
U1>
59PS
Positive-sequence undervoltage
protection
PSPTUV
U1<
27PS
Negative-sequence overvoltage
protection
NSPTOV
U2>
59NS
Frequency protection
FRPFRQ
f>/f<,df/dt
81
Three-phase voltage-dependent
overcurrent protection
PHPVOC
3I(U)>
51V
Overexcitation protection
OEPVPH
U/f>
24
Three-phase thermal protection for
feeders, cables and distribution
transformers
T1PTTR
3Ith>F
49F
Three-phase thermal overload
protection, two time constants
T2PTTR
3Ith>T/G/C
49T/G/C
Three-phase overload protection for
shunt capacitor banks
COLPTOC
3I> 3I<
51,37,86C
Current unbalance protection for
shunt capacitor banks
CUBPTOC
dI>C
60N
Three-phase current unbalance
protection for shunt capacitor banks
HCUBPTOC
3dI>C
60P
Shunt capacitor bank switching
resonance protection, current based
SRCPTOC
TD>
55ITHD
Compensated neutral unbalance
voltage protection
CNUPTOV
CNU>
59NU
Directional negative-sequence
overcurrent protection
DNSPDOC
I2> ->
67Q
Low-voltage ride-through protection
LVRTPTUV
UU
27RT
Voltage vector shift protection
VVSPPAM
VS
78VS
Directional reactive power
undervoltage protection
DQPTUV
Q> -> ,3U<
32Q,27
Reverse power/directional
overpower protection
DOPPDPR
P>/Q>
32R/32O
Underpower protection
DUPPDPR
P<
32U
Table continues on next page
1MRS759117 A
Section 1
Introduction
REX640
9
Engineering Manual