2.1 General
41
7UT613/63x Manual
C53000-G1176-C160-2
lates the overtemperature in the protected object from the flowing current, with refer-
ence to the permissible temperature. This method is characterised by its easy han-
dling and a low number of setting values.
Detailed knowledge about the protected object, the environment and cooling is re-
quired for overcurrent protection with hot-spot calculation in accordance with IEC
60354; it is advisable in case of transformers with integrated temperature detectors.
For this method, set address to
142
THERM. OVERLOAD
=
IEC354
. For further details
see section 2.9
Overload
Protection 2
In case of 7UT613/63x it is possible to use an additional overload protection. In case
of a transformer, for example, the overtemperature of two windings can thus be de-
tected by means of current measurement or, apart from a transformer, the windings of
a shunt reactor can be monitored. For
THERM.OVERLOAD2
under address
144
select
from the same options as for the first overload protection.
RTD-boxes for
Overload
If, in case of an overload with thermal replica, the coolant temperature must be taken
into consideration, or if an overload protection with hot-spot calculation in accordance
with IEC 60354 is used (address
142
THERM. OVERLOAD
=
th repl w. sens
or
IEC354
), at least one RTD-box 7XV5662–xAD must be connected at the service in-
terface or an additional interface of the device, which informs the device with regard
to the coolant temperature. The additional interface is set in address
190
RTD-BOX
INPUT
. The possible interfaces are dependent on the version of 7UT613/63x (cf. Or-
dering Information and Accessories in the Appendix).
Port C
(service interface) is
available in all versions. Depending on the device version,
Port D
is also possible.
RTD-box Type
If RTD-boxes with 7UT613/63x are operated, set the number and type of transfer of
measuring locations (RTD = Resistance Temperature Detector) under address
191
RTD CONNECTION
:
6 RTD simplex
or
6 RTD HDX
(with one RTD-box) or
12 RTD
HDX
(with two RTD-boxes). The settings have to comply with those of the RTD-box.
Note
The assignment with regard to which temperature measuring point shall be used for
which overload protection will be effected later during setting of the protection func-
tions.
Overexcitation
Protection
The overexcitation protection is used to detect increased overflux or overinduction
conditions in generators and transformers, especially in power station unit transform-
ers, which cause impermissible temperature rise in the iron. Note that the overexcita-
tion protection (address
143
OVEREXC. PROT.
) can only be used if the device is
equipped with voltage measurement inputs and voltages are connected. This protec-
tion is not applicable for single-phase busbar protection (address
105
PROT. OBJECT
=
1ph Busbar
). For further details see section 2.11
Reverse Power
Protection
The reverse power protection (address
150
REVERSE POWER
) protects mainly a
turbine-generator unit during failure of energy to the prime mover. It can be applied,
for example, as disconnection criterion in the system. It can only be used in three-
phase protected objects, thus not at address
105
PROT. OBJECT
=
1 phase
transf.
or
1ph Busbar
. The reverse current protection requires that the device is
connected to a voltage transformer set and, together with a connected current trans-
Summary of Contents for SIPROTEC 7UT613 series
Page 16: ...Contents 16 7UT613 63x Manual C53000 G1176 C160 2 Literature 631 Glossary 623 Index 633 ...
Page 30: ...1 Introduction 30 7UT613 63x Manual C53000 G1176 C160 2 ...
Page 506: ...A Appendix 506 7UT613 63x Manual C53000 G1176 C160 2 7UT633 D E ...
Page 508: ...A Appendix 508 7UT613 63x Manual C53000 G1176 C160 2 7UT633 P Q ...
Page 510: ...A Appendix 510 7UT613 63x Manual C53000 G1176 C160 2 7UT635 D E ...
Page 512: ...A Appendix 512 7UT613 63x Manual C53000 G1176 C160 2 7UT635 P Q ...
Page 515: ...A 2 Terminal Assignments 515 7UT613 63x Manual C53000 G1176 C160 2 7UT633 B ...
Page 517: ...A 2 Terminal Assignments 517 7UT613 63x Manual C53000 G1176 C160 2 7UT633 N ...
Page 519: ...A 2 Terminal Assignments 519 7UT613 63x Manual C53000 G1176 C160 2 7UT635 B ...
Page 521: ...A 2 Terminal Assignments 521 7UT613 63x Manual C53000 G1176 C160 2 7UT635 N ...
Page 622: ...A Appendix 622 7UT613 63x Manual C53000 G1176 C160 2 ...
Page 632: ...Literature 632 7UT613 63x Manual C53000 G1176 C160 2 ...
