Function IEC 61850 IEC 60617 ANSI
Three-phase underimpedance
protection
UZPDIS ZZ 21G
Three-phase underexcitation
protection
UEXPDIS X< 40
Third harmonic-based stator earth-
fault protection
H3EFPSEF dUo>/Uo3H 64TN
Rotor earth-fault protection (injection
method)
MREFPTOC Io>R 64R
High-impedance or flux-balance
based differential protection
MHZPDIF 3dIHi>M 87HIM
Out-of-step protection with double
blinders
OOSRPSB OOS 78PS
Negative-sequence overcurrent
protection for machines
MNSPTOC I2>M 46M
Loss of phase, undercurrent PHPTUC 3I< 37
Loss of load supervision LOFLPTUC 3I< 37
Motor load jam protection JAMPTOC Ist> 50TDJAM
Motor start-up supervision STTPMSU Is2t n< 49,66,48,50TDLR
Motor start counter MSCPMRI n< 66
Phase reversal protection PREVPTOC I2>> 46R
Thermal overload protection for
motors
MPTTR 3Ith>M 49M
Stabilized and instantaneous
differential protection for machines
MPDIF 3dl>M/G 87M/87G
Underpower factor protection MPUPF PF< 55U
Stabilized and instantaneous
differential protection for two- or
three-winding transformers
TR3PTDF
3dI>3W 87T3
Stabilized and instantaneous
differential protection for two-winding
transformers
TR2PTDF
3dI>T 87T
Numerical stabilized low-impedance
restricted earth-fault protection
LREFPNDF dIoLo> 87NLI
High-impedance based restricted
earth-fault protection
HREFPDIF dIoHi> 87NHI
High-impedance differential
protection for phase A
HIAPDIF dHi_A> 87_A
High-impedance differential
protection for phase B
HIBPDIF dHi_B> 87_B
High-impedance differential
protection for phase C
HICPDIF dHi_C> 87_C
Circuit breaker failure protection CCBRBRF 3I>/Io>BF 50BF
Three-phase inrush detector INRPHAR 3I2f> 68HB
Master trip TRPPTRC Master Trip 94/86
Arc protection ARCSARC ARC AFD
High-impedance fault detection PHIZ HIF HIZ
Table continues on next page
Section 1 1MRS759117 A
Introduction
10 REX640
Engineering Manual
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