5.12.5. TRANSFER NEUTRAL DELAY
The neutral delay time period will be initiated once both of the power-switching devices
are in the open position during a transfer sequence. Select desired neutral delay time in
seconds. If no delay is required, set this time delay to zero.
Note: The Neutral Delay timer maybe automatically bypassed subject to the setting of
the “Neutral Bypass” feature (per Section 5.11.12) based on operating conditions or if
the originating source voltage is in a de-energized (i.e. blackout) state prior to transfer.
5.12.6. TRANSFER PRE DELAY (LDC)
The pre-transfer delay period will be initiated upon an impending transfer in either
direction when both sources of power are available. The pre-transfer output relay will
energize “x” seconds prior to a load transfer based on the setting of the pre-transfer delay
timer. The pre-transfer output relay will stay energized until the post-transfer delay time
commences. If no delay is required, set this time delay to zero.
5.12.7. TRANSFER POST DELAY (LDC)
Immediately following a transfer in either direction, a post-transfer timer will start timing
and the post-transfer output relay will energize. Once the post-transfer delay timer
expires the post-transfer output relay will de-energize. If no delay is required, set this
time delay to zero.
5.12.8. SRC 2 (GEN) GEN COMMIT TO TRANSFER DELAY
Should the generator fail to transfer on load with the “commit to transfer” feature enabled,
the ATS will automatically re-transfer back to the utility supply if within nominal limits
following expiry of the “Commit to Transfer” timer.
5.12.9. TRANSFER FAIL DELAY
The transfer fail timer is activated whenever a transfer sequence is initiated. The timer
will activate a fail alarm condition if the transfer switch fails to successfully transfer within
the transfer fail time delay setting.
5.12.10. TRANSFER MAX ERROR CONDITION DELAY
The TSC 900 controller continuously monitors the status of ATS mechanism position
inputs (i.e. on source 1 and on source 2). If an abnormal condition is detected, the
Transfer Max Error Condition Delay timer is activated. If the abnormal condition exists
for longer than the time setting, a Transfer Fail alarm condition will be activated. This
parameter will be factory set for the specific ATS mechanism type.
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