TS 870 Transfer Switch
PM062 REV 11 16/04/19 43 Thomson Power Systems
5. The generator set should be manually turned off at the local control panel.
8.3.2. MECHANICALLY OPERATED POWER SWITCHING DEVICE PUSH
BUTTONS
MANUAL TRANSFER TO GENERATOR SUPPLY (Open Transition)
To transfer manually to generator supply, follow procedure listed below;
1. Turn the Transfer Switch door mounted System Operation Mode
selector to manual or Select MAN mode on TSC 900 Controller (refer to
TSC 900 manual for further information).
2. Manually start the generator set at its local control panel, and ensure it
is operating at normal voltage and frequency, with its output circuit
breaker closed.
3. Manually open the utility power switching device using the red (O)
Mechanical Open pushbutton located on the face of the power switching
device. Refer to Diagrams #1 & 2 below. Verify the utility power
switching device contacts are open via Green (O) open contact status
flag.
4. Ensure the generator power switching device’s spring mechanism is
fully charged as indicated by yellow –Spring Charged flag. If the power
switching device is not charged, it maybe manually charged by locating
the manual charge handle mechanism on the face of the power
switching device, then pulling forward and then down 1-6 times until the
yellow Spring Charged flag is displayed. Refer to Diagrams #1 & 2 below
and the power switching device’s manual for further information.
NOTE
The yellow OK Flag indicates the power switching
device is charged however it may not be ready to
close if the transfer switch mechanical or electrical
interlocks are not satisfied.
5. If the generator supply is at normal voltage and frequency levels,
manually Close the generator power switching device using the red (I)
Mechanical Close pushbutton located on the face of the power switching
device. Refer to Diagrams #1 & #2 below. Verify the generator power
switching device contacts are closed via red (I) closed contact status
flag.
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