TS 970 Transfer Switch
PM163 REV 0 20/02/05 14 Thomson Power Systems
NOTE: A neutral delay timer circuit if enabled will delay the transfer sequence in the
neutral position until the neutral delay time period expires.
An engine cooldown timer circuit will be initiated once the load is transferred from the
generator supply. Following expiry of the cooldown delay period (adjustable from 0 to
60 minutes), the engine start signal will be removed (contact opening) to initiate
stopping of the generator set.
5.2. TEST MODES
The transfer switch may be tested utilizing the TSC 900 GHC display push-buttons, optional
four position test switch (If fitted) or remote power fail test switch. A simulated utility power
failure condition will be activated when the test mode is selected. The transfer switch will
operate as per a normal utility power fail condition.
The transfer switch will remain on generator supply until the test mode is terminated. It will
then immediately transfer back to the utility supply and then continue to operate the generator
set for its cooldown period then stop.
NOTE: The transfer switch will automatically return to the utility supply (if within nominal limits)
if the generator set fails while in the test mode.
6. GENERAL NOTES ON SERVICING POWER CONTACTOR ATS
DANGER
Arc Flash and Shock Hazard. Will cause severe injury or death. Do not open
equipment until ALL power sources are disconnected. This equipment must be
installed and serviced only by qualified electrical personnel utilizing safe work
practices and appropriate Personal Protective Equipment (PPE). Failure to do
so may cause personal injury or death.
NOTE: Refer to SECTION 4.2 of this manual for identification of Power Contactor type supplied for
the Transfer Switch.
6.1. EQUIPMENT INSPECTION
When performing any service work on the power contactor ATS, it is imperative that the
following be observed:
To maintain mechanical integrity, ensure that:
• All fasteners are adequately tightened.
• Power contactor arc chute are in good condition.
• Power contactor is free of dust, dirt, soot, grease, moisture and corrosion.
To Next Page
Loading...
Need help?
General
