6–96 345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
S5 INPUTS/OUTPUTS CHAPTER 6: SETPOINTS
S5 Inputs/Outputs
Figure 6-40: Main inputs/outputs menu
Contact inputs
The 345 relay is equipped with ten (10) 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 345 typical wiring
diagram) that require an external DC voltage source. The voltage threshold (17V, 33V, 84V,
166V) is selectable, and it applies for all ten 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
CONTACT INPUT 1
Range: 14 characters
Default: Bkr1 52a (CI#1)
CONTACT INPUT 2
Range: 14 characters
Default: Bkr1 52b (CI#2)
CONTACT INPUT 3
Range: 14 characters
Default: Bkr2 52a (CI#3)
CONTACT INPUT 4
Range: 14 characters
Default: Bkr2 52b (CI#4)
CONTACT INPUT X [5 to 10]
Range: 14 characters
Default: Input X
DEBOUNCE TIME
↘
CONTACT INPUT X [1 TO 10]
Range: 1 to 64 ms
Default: 2 ms
Each of the contact inputs 5 to 10, can be named to reflect the function it represents within
the application. Up to 14 alpha-numeric characters are available for names.
S5 INPUTS/OUTPUTS
CONTACT INPUTS
OUTPUT RELAYS
VIRTUAL INPUTS
REMOTE INPUTS
898768A2.cdr
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