Pump Shutdown; Power Failure - Varian Turbo-V 301 Notice De Mode D'emploi

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Or twice if the display shows other parameters, either
before starting the pump or after it is operating.
If LOW SPEED is selected before starting the pump,
the display shows:
R E A D Y
F O R
S O F T
S T A R T
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 3 KRPM.
L O C A L
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
If the LOW SPEED mode is selected after normal
operating condition is reached, the display shows:
A P P R O A C H
L S
while approaching the low speed value.
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
removed and the pump will begin to slow down.
L S
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

Power Failure

In the event of a power failure (momentary or long
N G
term), the Turbo-V controller will stop the turbopump
L S
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
automatically restarts the interconnected devices and
L S
the turbopump in the proper sequence.
The display shows:
P U M P
1 2
until normal operation achieved.
84
TECHNICAL INFORMATION
I
N G
X X
K R P M
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
87-900-940-01 (F)
L S
L S
I O N
I
N G

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