82 • Control Keypad
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FAULT PARAMETERS
- **** -
Displays in MAXIMIZED MODE only
(refer to section
6.5.1 page 56 for changing mode)
Display and Default
Values
Range Description
Remarks
INSULATION ALARM
OFF
OFF, 0.2–
5Mohm
Sets
INSULATION
ALARM level.
Insulation testing is enabled only when motor is not
running and after 60 seconds in the
Stop
state.
INSULATION TRIP
OFF
OFF, 0.2–
5Mohm
Activates
INSULATION
ALARM trip.
While motor is running the value of the insulation
resistance shown in the display is the last
measured value prior to starting of the motor. While
testing, if the insulation level drops below Alarm
level - a message: MOTOR INSULATION ALARM
will display and the insulation alarm relay will be
energized. The
Fault
LED on the control keypad of
the RVS-DN will blink.
The alarm will disappear if insulation level will
return to normal for more than 60 seconds.
While testing, if the insulation level drops below
Fault level - a message: INSULATION TRIP will
display and the fault relay of the RVS-DN will go to
the fault position (as programmed in the I/O
PROGRAMMING PARAMETERS).
The
Fault
LED on the front of the RVS-DN will light.
In this status motor can not be started.
Note
:
In order for the INSULATION ALARM or TRIP
option to operate properly an isolating device, such
as a line contactor must exist between the mains
and the RVS-DN
and
it must be open.
AUTO RESET
NO
NO/YES Sets
RVS-
DN’s AUTO
RESET
mode of
operation.
The RVS-DN can be automatically reset for
UNDER VOLTAGE and PHASE LOSS faults.
Refer to section
7.7.2 on page 69 for details on
setting UNDER VOLTAGE protection.
To start the motor after UNDER VOLTAGE and
PHASE LOSS faults have been cleared, remove
the START signal and recommence the signal.
AUTO RESET function has a non-programmable
time delay of 60 seconds.
THERMISTOR TYPE
PTC
PTC/NTC Sets
input
THERMISTO
R TYPE
Available only when analog card is installed.
Measures the motor’s thermistor resistance and
trips the RVS-DN when the level decreases below
set level.
THERMISTOR TRIP
OFF
OFF, 0.1–
10Kohm
Sets RVS-
DN’s
THERMISTO
R TRIP mode
of operation.
Note:
THERMISTOR TRIP has a factory preset time
delay of 2 sec.
UNDER CUR. RESET
OFF
10–
120min.,
OFF.
Sets RVS-
DN’s UNDER
CURRENT
RESET time
delay.
If the UNDER CUR. RESET setting is OFF then
RVS-DN will not automatically reset after an
UNDER CURRENT TRIP fault occurs.
If you set the UNDER CUR. RESET setting to a
time value then RVS-DN will automatically reset
with a delay (the time defined for UNDER CUR.
RESET). If the start command is not removed,
motor will restart automatically after the delay time.
During the delay time a message U/C TRIP.RST
IN: XX MIN. is displayed.
Refer to section
7.7.2 on page 69 for details on
setting of UNDER CURRENT TRIP.