TECHNICAL INFORMATION
69
87-900-852-01 (B)
With normal LOW SPEED operation, the pump will run
at about 2/3 of its nominal speed and achieves a base
pressure somewhat higher than the standard
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 3 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
I
N G
L S
X X
K R P M
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
O P E R A T
I
O N
X X
K R P M
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.
Power Failure
In the event of a power failure (momentary or long 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 automatically restarts the interconnected
devices and the turbopump in the proper sequence. The
display shows:
P U M P
I
S
S T A R T
I
N G
1
2
X X
K R P M
until normal operation achieved.
Remote Control Mode Operation
If remote signals are used to operate the controller, it
must be programmed for remote operation (see
paragraph "FRONT/REMOTE/232 Selection") and
when ready to start, the display shows:
R E A D Y
F O R
R E M O T E
S O F
T
S T A R T
If the Soft Start has been deselected the display shows:
P U M P
R E A D Y
:
U S E
R E M O T E
S T A R T
With or wihout Soft Start mode selected the
START/STOP and LOW SPEED front panel
pushbuttons are inoperative, while the CYCLE
NUMBER and PUMP CURRENT pushbuttons are
always active.
RS 232 Control Mode Operation
If the RS 232 option is installed and the controller has
been programmed for RS 232 operation, the controller
may be driven by a computer and when ready to
operate, the display shows:
R E A D Y
F O R
R S
2
3
2
S O F
T
S T A R T
If the Soft Start has been deselected the display shows:
P U M P
R E A D Y
:
U S E
R S
2
3
2
L
I
N E
With or wihout Soft Start mode selected the
START/STOP, LOW SPEED functions are under
computer control, while the CYCLE NUMBER and
PUMP CURRENT front panel pushbuttons are always
active.
Summary of Contents for Turbo-V 250 series
Page 2: ......
Page 3: ...Turbo V 250 Controllers...
Page 4: ......
Page 5: ......
Page 58: ...TECHNICAL INFORMATION 51 87 900 852 01 B Controller model 969 9425 outline...
