Siemens SIPROTEC 7UT613 series Manual page 166

2 Functions
User-defined Char-
acteristics
166
For the stages the following alternative values are set:
• For definite time overcurrent protection (phases):
address 2111 or 2112 for pickup value I>>,
address 2113 for delay time T I>>,
address 2114 or 2115 for pickup value I>,
address 2116 for delay time T I>,
• For inverse time overcurrent protection (phases) acc. to IEC curves:
address 2121 or 2122 for pickup value Ip,
address 2123 for time multiplier T Ip;
• For inverse time overcurrent protection (phases) acc. to ANSI curves:
address 2121 or 2122 for pickup value Ip,
address 2124 for time multiplier D Ip;
For inverse time overcurrent protection the user may define his own tripping and
dropout characteristic. For configuration in DIGSI a dialogue box appears. Enter up to
20 pairs of current value and tripping time value.
The characteristics can also be viewed in DIGSI as an illustration.
Figure 2-75 Entry and visualisation of a user-specific trip characteristic with DIGSI - example
In order to be able to create a user-defined tripping characteristic, the following must
be set during configuration of the scope of functions in address120 DMT/IDMT
Phase, option User Defined PU (see section 2.1.3.1). If you also want to specify
the dropout characteristic, set User def. Reset.
The value pairs refer to the setting values for current and time.
Since current values are rounded in a specific pattern before they are processed in the
device, we recommend to use exactly the same preferred current values you can find
in the 2-7 table.
7UT613/63x Manual
C53000-G1176-C160-2