Changing Upper/Lower Limits For Alarm Activation And Cancellation; During Alarm Generation; Alarm Cancel; Harmonic Display - Mitsubishi Electric Super-S ME96SS Series Manual

Operating Instructions
»Changing Upper/Lower Limits for Alarm Activation and Cancellation
When measurement values exceed the upper/lower limit values that have been set, an alarm activates and the screen begins to blink.
The blinking mark on the bar graph indicates the current upper/lower limit value settings.

During Alarm Generation

»
Alarm condition: When a measured value exceeds the alarm value setting, the screen begins to flash and the alarm contact closes.
Alarm cancelled: When the alarm is cancelled, the screen stops flashing and the alarm contact opens.
Measurement value ≥ Upper limit alarm value
Alarm reset method
(or ≤ Lower limit alarm value)
Screen
Automatic
(Auto)
Alarm contact
Screen
Manual
(Hold)
Alarm contact

Alarm Cancel

»
The alarm can be reset automatically or manually. The alarm recovery method varies according to the reset method setting.
Alarm reset method
Automatic (Auto)
Manual (Hold)
Alarm delay Time
»
If an alarm delay time has been set, alarm notification begins only when the measurement value exceeds the upper/lower limit
alarm value for a period longer than the alarm delay time.
»Harmonic Display
The harmonic effective value, distortion ratio and content
ratio can be displayed. To do so, first set the harmonic
display (set-up menu: 3.7).
<Example of total harmonic current display> <Example of 5th-deg harmonic voltage display>
Harmonic current
Degree Distortion
RMS
(content) ratio
Harmonic total
1st (fundamental)
3rd, 5th, 7th, 9th,
11th, 13th, 15th,
17th, 19th, 21st,
23rd, 25th, 27th,
29th and 31st
23
Measurement value < Upper limit alarm value
or will flash
Closed
or will flash or
(Alarm activated)
(Alarm on hold)
Closed
Closed
The alarm resets automatically when the measurement value returns to within the upper/lower limit set value.
The alarm setting changes to "on hold" even after the measurement value becomes returns to within the upper/lower limit value setting. Once the
value returns to within the upper/lower limit value set, perform the following alarm recovery operations.
(Note: Alarm recovery operations cannot be carried out from the maximum/minimum value display screen or contact input screen.)
<To select item and cancel alarm>
When the item that caused the alarm is displayed, press the
For items with phases such as current and voltage, it is necessary to
RESET
press the button for each phase to cancel the alarm.
<To cancel alarms for all items>
To cancel alarms for all items at once (batch), press the
Upper: Degree No.
Middle: Distortion (content) ratio
Lower: Effective value
N-phase harmonic current Harmonic voltage
Distortion Distortion
RMS RMS
(content) ratio (content) ratio
(or > Lower limit alarm value)
Constantly on
Upper/Lower limit indicator
Open
will flash Constantly on
RESET
(Alarm cancelled)
Open
Cancellation method
RESET
button to deactivate the alarm.
RESET
button for 2s when in operating mode.
»Changing the Harmonic Degree Display
Press the or button to change the harmonic degree.
Harmonic current
PHASE
Previous
Current total phase 1
measurement
Current total phases 2, 3
screen
DISPLAY
Current 1 -degree phase 1
st
Current 1 -degree phases 2, 3
st
Displayed in order: 3rd,
5th, 7th, 9th, 11th, 13th,
15th, 17th, 19th, 21st,
23rd, 25th, 27th, 29th
Current 31 st -degree phase 1
Current 31 -degree phases 2, 3
st
If the item that caused the alarm is displayed on
the screen, the digital value, unit (A, V, W, var,
PF, HZ, %, DM, THD) and phase (1, 2, 3, N) will
be displayed as shown in the table below. If the
item is not displayed on the screen, the screen will
not flash.
Alarm status Digital value
Alarm activated Flashing * Flashing
Alarm on hold On Flashing
Alarm cancelled On
* Only flashes if the phase that caused the alarm is being displayed.
N-phase harmonic current Harmonic voltage
Current total phase N Voltage total phase 1N
Voltage total phases 2N, 3N
DISPLAY DISPLAY
Current 1 -degree phase N Voltage 1 -degree, phase 1N
st st
Voltage 1 -degree, phases 2N, 3N
st
Displayed in order: 3rd, Displayed in order: 3rd,
5th, 7th, 9th, 11th, 13th, 5th, 7th, 9th, 11th, 13th,
15th, 17th, 19th, 21st, 15th, 17th, 19th, 21st,
23rd, 25th, 27th, 29th 23rd, 25th, 27th, 29th
Current 31 st -degree phase N Voltage 31 st -degree, phase N
Voltage 31 -degree, phases 2N, 3N
st
Unit Phase
Flashing *
Flashing
*
On On
PHASE
DISPLAY
Next
measurement
screen