GE 339 Instruction Manual page 276

S5 INPUTS/OUTPUTS
6–154
Breaker Close: Seal-in
Start Inhibit: Self-reset
Critical Failure: Self-reset
The user can configure an Auxiliary Relay as either latched or self-reset. Logic diagrams for
each Output Relay are provided for detailed explanation of their operation.
Operation of the BREAKER TRIP and BREAKER CLOSE relays is 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.
52a Contact 52b Contact
Configured Configured
Yes Yes
Yes No
No Yes
No No
Output Relay 1 "Breaker Trip"
The following path is available using the keypad. For instructions on how to use the
keypad, please refer to Chapter 3 - Working with the Keypad.
PATH:
SETPOINTS > S5 INPUTS/OUTPUTS > OUTPUT RELAYS > RLY 1 TRIP
SEAL IN TIME
Range: 0.00 to 9.99 s in steps of 0.01
Default: 0.04 s
This setting defines the time to be added to the reset time of the Relay 1 Trip output, thus
extending its pulse width. This is useful for those applications where the 52 contacts
reporting the breaker state are faster than the 52 contacts that are responsible for
interrupting the coil current.
BLOCK RLY 1 TRIP
Range: Off, Contact Input 1 to 10, Virtual Input 1 to 32, Remote Input 1 to 32, Logic
Elements 1 to 16
Default: Off
This setting defines a block to the Trip Output relay. When the selected input is asserted,
the Trip Output relay will be blocked.
Relay Operation
Trip Relay remains operational until 52b indicates an
open breaker. Close Relay remains operational until 52a
indicates a closed breaker.
Trip Relay remains operational until 52a indicates an
open breaker. Close Relay remains operational until 52a
indicates a closed breaker.
Trip Relay remains operational until 52b indicates an
open breaker. Close Relay remains operational until 52b
indicates a closed breaker.
Trip Relay operates until either the Breaker Failure delay
expires (if the Breaker Failure element is enabled), or 100
ms after the feature causing the trip resets. Close Relay
operates for 200 ms.
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS