Output Relays - GE Multilin 350 Series Instruction Manual

S5 INPUTS/OUTPUTS
NOTE:
NOTE

Output relays

6–136
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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 10[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.
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.
The 350 relay is equipped with seven electromechanical output relays: two special relays
designated for Breaker Trip and Close (Relay 1 "Trip", Relay 2 "Close"), four general purpose
relays (Auxiliary Relays 3 to 6), and one Critical Failure relay for fail-safe relay indication.
The special purpose relays have fixed operating characteristics and the general purpose
relays can be configured by the user. Logic diagrams for each output relay are provided for
detailed explanation of their operation.
Operation of these breaker-control relays is designed to be controlled by the state of the
circuit breaker as monitored by a 52a or 52b contact.
• The Trip and Close relays reset after the breaker is detected in a state corresponding
to the command. When a relay feature sends a command to one of these special
relays, it will remain operational until the requested change of breaker state is
confirmed by a breaker auxiliary contact and the initiating condition has reset.
• If the initiating feature resets, but the breaker does not change state, the output relay
will be reset after a default interval of 2 seconds.
• If neither of the breaker auxiliary contacts, 52a nor 52b, is programmed to a logic
input, the Trip Relay is de-energized after either the delay programmed in the Breaker
Failure feature, or a default interval of 100 ms after the initiating input resets. The
Close Relay is de-energized after 200 ms.
• If a delay is programmed for the Trip or Close contact seal-in time, then this delay is
added to the reset time. Note that the default setting for the seal-in time is 40 ms.
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS