Pump Shutdown; Power Failure - Varian Turbo-V 70 Bedienungshandbuch

The pump reaches the Normal high speed, then
decrease the speed to the low speed value and the
display shows:
A P P R O A C H
X X
If the Soft Start has been deselected the display shows:
P U M P R E A D Y
S T A R T
where: LS = means low speed mode is selected.
After starting, a LS appears on the right bottom corner
of the following displays:
S O F T S T A R T
[ - - - -
P U M P I S
1 2 X X
N O R M A L
X X
With normal LOW SPEED operation, the pump will run
at about 2/3 of its nominal speed and achieves a base
pressure somewhat
specifications. If the gas load becomes higher, the
controller output frequency and voltage start to
decrease automatically, and the Turbo-V pump is
slowed down in proportion to the gas load until it
reaches about 9 KRPM.
If the LOW SPEED mode is selected after normal
operating condition is reached, the display shows:
A P P R O A C H
X X
while approaching the low speed value.
I N G L S
K R P M
: P U S H
B U T T O N
O N
- - - - - - ]
S T A R T I
K R P M
O P E R A T I O N
K R P M
higher than the standard
I N G L S
K R P M
When the low speed mode is deselected, the pump
starts to accelerate to its rotational speed.
The display shows:
N O R M A L
L S

Pump Shutdown

Press the front panel STOP pushbutton or remove the
remote signal; the power from the turbopump will be
L S
removed and the pump will begin to slow down.
An emergency stop signal is provided via a remote
contact. This signal is active in any of the three
operation selections: FRONT, REMOTE, RS 232; when
activated, the display will be as shown in the following
figure.
L S
N G

Power Failure

In the event of a power failure (momentary or long
L S
term), the Turbo-V controller will stop the turbopump
and all the interconnected pumps/devices. The Turbo-V
vent valve device, if used, will vent the turbopump only
if the power failure is longer than the preset delay time.
When power is restored, the Turbo-V controller
L S
automatically restarts the interconnected devices and
the turbopump in the proper sequence.
The display shows:
P U M P
1 2
until normal operation achieved.
L S
64
TECHNICAL INFORMATION
O P E R A T
X X K R P M
S Y S T E M
O V E R R I D E
I S S T A R T
X X K R P M
87-900-869-01 (B)
I O N
I N G