Siemens SIPROTEC 7UT635*-* N series User Manual

2 Functions
176
7UT613/63x Manual
C53000-G1176-C160-2
protection is activated on the earthed supply side, this inrush restraint is required.
Function parameters of the inrush restraint are set in „Inrush“.
The inrush restraint is based on the evaluation of the 2nd harmonic present in the
inrush current. The ratio of 2nd harmonics to the fundamental component 2.HARM.
3I0 (address 2241) is set to I
2fN
/I
fN
= 15 % as default setting. It can be used without
being changed. To provide more restraint in exceptional cases, where energising con-
ditions are particularly unfavourable, a smaller value can be set in the above-men-
tioned address.
If the current exceeds the value indicated in address 2242 or 2243 I Max InRr.
3I0, no restraint will be provoked by the 2nd harmonic.
Additional Time
Overcurrent Pro-
tection Functions
for Residual
Current
In the aforegoing description, the respective first time overcurrent protection for resid-
ual current has been described. The differences in the parameter addresses and
message numbers of the first, second and third time overcurrent protection are illus-
trated in the following table. The positions marked by x are identical.
Note
If the time overcurrent protection is assigned to a side of the main protected object,
the current values are set referred to the rated current of that side II/I
NS
.
2.4.3.2 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under Ad-
ditional Settings.
The table indicates region-specific presettings. Column C (configuration) indicates the
corresponding secondary nominal current of the current transformer.
Addresses
of the
parameters
Addresses of the
dynamic
parameters
Message no.
1st time overcurrent protection for residual current 22xx 23xx 191.xxxx(.01)
2nd time overcurrent protection for residual current 34xx 35xx 321.xxxx(.01)
3rd time overcurrent protection for residual current 36xx 37xx 323.xxxx(.01)
Addr. Parameter C Setting Options Default Setting Comments
2201 3I0 O/C ON
OFF
Block relay
OFF 3I0 Time Overcurrent
2202 InRushRest. 3I0 ON
OFF
OFF InRush Restrained O/C 3I0
2208
A
3I0 MAN. CLOSE 3I0>> instant.
3I0> instant.
3I0p instant.
Inactive
3I0>> instant. O/C 3I0 Manual Close Mode

Siemens SIPROTEC 7UT635*-* N series Specifications

General

Brand	Siemens
Model	SIPROTEC 7UT635*-* N series
Category	Protection Device
Language	English