ABB REL 301, Instruction Manual

Page: 94 / 132

I.L. 40-386.3
(10/94) 4-11
NOTE: Setting at
∆
V
∆
I is not recommended because a lot of meaningless data
will be stored, such as breaker opening or closing, etc.
IF POWER IS INTERRUPTED TO RELAY ALL PRIOR “INTERMEDIATE
TARGET DATA” AND “OSCILLOGRAPHIC DATA” WILL BE LOST.
4. 10. PROGRAMMABLE CONTACT OUTPUTS
(Optional Feature)
REL 301/302 has five output contacts OC-1 to OC-5 which can be dedicated to user-
selected functions, OC-1 has the same rating as the trip contacts. OC-2 - OC-5 have
the same rating at non-trip contacts. See Section 1.6.3. The 30 available functions are
listed in
Table 4-4 . Each function can be inverted if desired. For REL 302 (Pilot) OC-5
is preprogrammed with the STOP function. However OC-5 is fully programmable and
can be changed by user.
Several functions can be directed to one contact, using either an OR or an AND oper-
ator. With OR, any selected function operates the contact, whereas with AND all the
selected functions need to be active in order to operate the contact. A pickup and a
dropout timer can also be individually set for each programmable contact output.
Programming the output contacts is made via RCP and requires the password to be
entered. An example of the programmable contact output screen is shown at the end
of this section.
Selecting a function for an output contact is made by first toggling the <F2> function
key to select Logic True (T) or Logic Negation (F). The current logic is shown on the right
side of the display under contact S Dropout timer selection. Then move the cursor with
the arrow keys to the crossing of the desired function and contact and press the IN-
SERT key. T for logic true or F for logic Negation will show at that position.
The DELETE key can be used to de-select a previously selected function.
If a contact is to be controlled by several functions, the same procedure applies for
each function, without forgetting the combining operator OR or AND.
To set the timers, move the cursor to the desired timer underneath the contact output
table and press ENTER. The value to be set is displayed in the upper right corner of
the screen and can be adjusted with the direction keys followed by ENTER when the
desired time is displayed.