6–158 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
S5 INPUTS/OUTPUTS CHAPTER 6: SETPOINTS
S5 Inputs/Outputs
Figure 6-67: Main inputs/outputs menu
Contact inputs
The 350 relay is equipped with eight (8) contact inputs, which can be used to provide a
variety of functions such as for circuit breaker control, external trips, blocking of protection
elements, etc. All contact inputs are wet type contacts (refer to the 350
typical wiring
diagram) that require an external DC voltage source. The voltage threshold (17V, 33V, 84V,
166V) is selectable, and it applies for all eight contact inputs.
The contact inputs are either open or closed with a programmable debounce time to
prevent false operation from induced voltage. Because of de-bouncing, momentary
contacts must have a minimum dwell time greater than half power frequency cycle. The
debounce time is adjustable by the user.
PATH: SETPOINTS > S5 INPUTS/OUTPUTS > CONTACT INPUTS
SELECT DC VOLTAGE
Range: 17 V, 33 V, 84 V, 166 V
Default: 84 V
52a BKR INPUT 1
Range: Select alpha-numeric name
Default: 52a (CI#1)
52b BKR INPUT 2
Range: Select alpha-numeric name
Default: 52b (CI#2)
CONTACT INPUT X [3 to 10]
Range: Select alpha-numeric name
Default: Input X
DEBOUNCE TIME
↘
CONTACT INPUT X [1 TO 10]
Range: 1 to 64 ms
Default: 2 ms
Each of the contact inputs 3 to 8, can be named to reflect the function it represents within
the application. Up to 18 alpha-numeric characters are available for names.
The debounce time is used to discriminate between oscillating inputs. The state will be
recognized if the input is maintained for a period consisting of the protection pass plus the
debounce setting.
NOTE:
Contact Input 1 and Contact Input 2 are named by the factory as 52a and 52b respectively
and are used for monitoring the breaker open/close state when wired to the breakers
auxiliary contacts 52a and 52b.
S5 INPUTS/OUTPUTS
CONTACT INPUTS
OUTPUT RELAYS
VIRTUAL INPUTS
REMOTE INPUTS
898768A2.cdr
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