3.73
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Basic Relay Operations
Operating the Relay Inputs and Outputs
Step 5. Set the control input IN101 debounce time.
For this example, assume that the auxiliary contacts are slow and
noisy; you must provide a slightly longer debounce time for these
contacts.
a. Double-click the mouse cursor (or press <Tab>) to highlight
IN101PU Pickup Delay for Contact Input.
b. Delete the present setting by pressing <Delete>.
c. Type 0.25 <Enter>.
d. Similarly change the IN101DO Input IN101 Dropout Delay
to 0.25.
The relay checks the new value and enters the value in the
QuickSet database.
Step 6. Configure the relay to read the circuit breaker auxiliary contact.
a. Expand the Breaker Monitor branch of the Settings tree view
by clicking the + button (see Figure 3.66).
b. In the tree view, click Breaker 1 to select circuit breaker monitor
settings for Circuit Breaker 1.
c. Set the 52AA1 SEL
OGIC control equation by clicking in the text
box labeled 52AA1 N/O Contact Input.
d. Type IN101, and then click or <Tab> to another field to specify
input IN101 as the control input that represents the close/open
state of Circuit Breaker 1.
Figure 3.65 Control Input Pickup and Dropout Delay Settings in QuickSet
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