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CHAPTER 6: SETPOINTS
Contact inputs
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 48: Inputs/Outputs with CONTACTOR menu
S5 INPUTS/OUTPUTS
CONTACT INPUTS
OUTPUT RELAYS
VIRTUAL INPUTS
NOTE: When SWITCHING DEVICE is selected as CONTACTOR:
ST
1. 1 output relay (Seal-In) - Not Used
ND
2.
2 output relay (Seal-In) - Not Used
RD
3. 3 output relay (Self-Reset) - Start Inhibit
TH
4. 4 output relay ( Latched) - TRIP
TH
TH
5. 5 to 6 output relay (Self-Reset or Latched) - Configurable Auxiliary Relays
The 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 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
S5 CONTACT INPUTS
SELECT DC VOLTAGE
▼
52a CONTACT
52b CONTACT
CONTACT INPUT 3
CONTACT INPUT 4
...
CONTACT INPUT 10
S5 OUTPUT RELAYS
RLY3 START INHIBIT
▼
RLY4 TRIP
RLY5 AUXILIARY
RLY6 AUXILIARY
S5 VIRTUAL INPUTS
VIRTUAL INPUT 1
VIRTUAL INPUT 2
VIRTUAL INPUT 3
▼
VIRTUAL INPUT 4
...
VIRTUAL INPUT 32
S5 INPUTS/OUTPUTS
S5 CONTACT INPUT 1
DEBOUNCE TIME
S5 CONTACT INPUT 10
DEBOUNCE TIME
S5 RLY3 START INHIBIT
RELAY OPERATION
S5 RLY4 TRIP
RELAY OPERATION
S5 RLY5 AUXILIARY
RELAY OPERATION
▼
OUTPUT TYPE
S5 RLY6 AUXILIARY
RELAY OPERATION
▼
OUTPUT TYPE
S5 VIRTUAL INPUT 1
VI 1 NAME
▼
VI 1 FUNCTION
VI 1 TYPE
896769.cdr
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