THOMSON TSC 7320 - Automatic Sequence of Operation

TSC 7320 Transfer Switch Controller
PM180 REV 0 23/02/10 Thomson Power Systems
15
3.5. AUTOMATIC SEQUENCE OF OPERATION
3.5.1. OPEN TRANSITION TRANSFER (NEUTRAL DELAY)
NOTE: For specific device settings and ranges, refer to SECTION 6 - Factory Default
Programming.
NOTE: Time delays indicated below are factory default settings only. Refer to TSC 7320 manual for alternate time delay settings available on
the TSC 7320 Controller
UTILITY POWER
FAIL
When voltage drops on any phase of the utility supply below 85% of rated voltage, a generator start sequence will
be initiated
GEN START The generator will start following expiry of the 2 second Gen Start timer
GEN WARMUP
A generator warmup period will be initiated once the generator starts running, and will not transfer until the timer
expires, or a fault occurs
TRANSFER TO
GEN
The load will transfer to the generator supply following expiry of the 2 second Gen Warmup timer
UTILITY POWER
RETURN
When utility power is restored to above 90% rated voltage on all phases, a utility return timer sequence will be
initiated
TRANSFER AWAY
FROM
GENERATOR
The load will transfer away from the generator supply following expiry of the 300 second utility return timer
TRANSFER TO
UTILITY
Once the load transfers off of the generator supply, the load will re-transfer back onto the utility supply following
expiry of the 3 second neutral delay timer
GEN COOLDOWN The generator will automatically stop following expiry of the 300 second cooldown timer.