Thermal Overload Protection, Two Time Constants Trpttr - ABB REG670 Applications Manual

Section 9
Current protection
9.7
366
Curve name
ANSI Moderately Inverse
ANSI/IEEE Definite time
ANSI Long Time Extremely Inverse
ANSI Long Time Very Inverse
ANSI Long Time Inverse
IEC Normal Inverse
IEC Very Inverse
IEC Inverse
IEC Extremely Inverse
IEC Short Time Inverse
IEC Long Time Inverse
IEC Definite Time
User Programmable
ASEA RI
RXIDG (logarithmic)
See chapter "Inverse time characteristics" in Technical Manual for the description of
different characteristics
tPCrv, tACrv, tBCrv, tCCrv: Parameters for customer creation of inverse time
characteristic curve (Curve type = 17). The time characteristic equation is:
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ç
A
ç
[ ] = +
t s B
ç
p
æ ö
i
-
C
ç ÷
ç
è > ø
è
in
EQUATION1958 V1 EN
tINNonDir is the definite time delay for the non directional earth fault current
protection, given in s.
OpUN> is set On to activate the trip function of the residual over voltage protection.
tUN is the definite time delay for the trip function of the residual voltage protection,
given in s.
Thermal overload protection, two time constants
TRPTTR
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
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÷
÷
×
InMult
÷
÷
ø
1MRK 502 071-UEN -
(Equation 209)
Application manual