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Local Panel User Interface
Configuration and
Parameter Setting
(cont.)
857-UM001A-EN-P – July 2009
Each stage of the protection functions can be disabled or enabled
individually in the Prot menu. When a stage is enabled, it will be
in operation immediately without a need to reset the relay.
The relay includes several protection functions. However, the
processor capacity limits the number of protection functions that
can be active at the same time.
Configuration Menu CONF
The following functions and features can be read and set via the
submenus of the configuration menu:
DEVICE SETUP
•
Bit rate for the command line interface in ports X4 and the front
panel. The front panel is always using this setting. If SPABUS
is selected for the rear panel local port X4, the bit rate is
according SPABUS settings.
•
Access level [Acc]
LANGUAGE
•
List of available languages in the relay
CURRENT SCALING
•
Rated phase CT primary current (Inom)
•
Rated phase CT secondary current (Isec)
•
Rated input of the relay [Iinput]. 5 A or 1 A. This is specified in
the order code of the device.
•
Rated value of I
CT primary current (Ionom)
01
•
Rated value of I
CT secondary current (Iosec)
01
•
Rated I
input of the relay [Ioinp]. 5 A or 1 A. This is specified
01
in the order code of the device.
•
Rated value of I
CT primary current (Io2nom)
02
•
Rated value of I
CT secondary current (Io2sec)
02
•
Rated I
input of the relay [Io2inp]. 5A, 1 A or 0.2 A. This is
02
specified in the order code of the device.
The rated input values are usually equal to the rated secondary
value of the CT.
The rated CT secondary may be greater than the rated input but
the continuous current must be less than four times the rated
input. In compensated, high impedance earthed and isolated
networks using cable transformer to measure residual current I
it is quite usual to use a relay with 1 A or 0.2 A input although
the CT is 5 A or 1A. This increases the measurement accuracy.
,
0
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