GE Industrial Solutions ASTAT XT - Manual (Page 28)

28 • Control Keypad
Function &
Default
Range Unit Description
Overload Class
IEC CLASS 10
IEC CLASS 10;
IEC CLASS 20;
NEMA CLASS
10;
NEMA CLASS
20;
NEMA CLASS
30; Sets Overload CLASS.
Overload Class is operational as programmed in the
Overload Protect
parameter. (see next parameter)
The O/L circuitry incorporates a thermal memory register
that calculates heating minus dissipation of the motor. The
ASTAT-XT trips when the register fills up.
The time constant for cool down after overload trip is:
For IEC/NEMA Class 10 – 320seconds
For IEC/NEMA Class 20 – 640seconds
For NEMA Class 30 – 960seconds
Refer to section
2.3 on page 10 for thermal characteristic.
Note:
When setting Motor Current to a higher level than
Starter Current, Overload Class
parameter is
automatically set to NEMA Class 10.
Overload Protect
Enabled
Enable after
EOR;
Enabled;
Disabled; Sets Overload Protection operation.
Enable after (End Of Ramp)
will set the overload
protection to be operative after starting process is completed
and (End Of Ramp) relay is energized.
Enabled
will set the overload protection to be operative at
all time.
Disabled
will set the overload protection not to be
operative at all time.
ATTENTION!
When Overload Protect is set to Disabled the motor
is not protected for Overload!!
Undervoltage FLT
300 Volt
120-600
V Sets Undervoltage Fault level.
Trips the ASTAT-XT when mains voltage drops below the level
that was set for a time longer than Undervoltage DLY.
Undervoltage DLY
5 SEC.
1 –10 sec. Sets Undervoltage Fault delay 23
Overvoltage FLT
480 Volt
250-750
V Sets Overvoltage Fault level.
Trips the ASTAT-XT when mains voltage increases above the
level that was set for a time longer than Overvoltage
DLY
. Can not be set lower than the Undervoltage FLT
setting.
Overvoltage DLY
2 SEC.
1 –10 sec. Sets Overvoltage Fault delay. 24
Store Settings
Main Settings
Storing modified parameters 25
To store selected parameters scroll through all parameters
until you reach Store Settings Main Settings, then
press the Set key.
After you store a parameter successfully the Data Saved
OK
message will display.
If ASTAT-XT fails to store the parameter the LCD Will display
the Storage Error message (refer to section
7 on page
59 for more details).
23 Becomes operational only after the start signal.
When voltage drops to zero (voltage outage) the ASTAT-XT will trip immediately, thus overriding the delay.
24 Becomes operational only after the start signal.
25 Pressing the Set key when the Store Settings Xxxxx Settings message does not appear on the display has no
effect.