Digital Multicircuit Protector S8M 15
■ Test Mode
Device startup operation can be tested by turning ON/OFF branch
outputs either individually or together. The branch outputs that are to
be used are set to be connected in Test Mode. The operation to turn
all branch outputs ON/OFF together can be used to check startup
and shutdown sequences.
1. Turning ON/OFF Individual Branch Outputs
The following display will appear when Test Mode is entered and the
Up and Down Keys ( and ) can be used to select the branch
output. Set the branch output number to be output, confirming the
number on the mode indicators, and then turn ON the output. The
ON/OFF (connected/cut off) status of the branch outputs can be
confirmed on the status indicators. An indicator will light green if the
output is connected normally.
2. Turn ON/OFF All Branch Outputs
The Up and Down Keys ( and ) can also be used to select all
branch output numbers. The ON or OFF display will appear. Use the
Mode Key to execute the operation.
Note: Test Mode can be entered only in protection level 0 or 1.
It cannot be entered in protection level 2.
■ Protection Level Setting
A protection level can be set to prevent operating errors during
normal operation. Reading or changing parameter settings and other
operations can be restricted in three levels.
Select PRT (protection level) from the Mode Selection Menu and
then perform the following procedure. (The following example shows
changing to protection level 0.)
■ Parameter Initialization
All S8M parameters can be restored to their default settings. Set
protection level 0 and then go to the Mode Selection Menu. INI
(parameter initialization) will be added to the menu. Select INI and
then perform the following procedure.
Note: 1. The Mode Selection Menu is not displayed in protection
level 1 or 2. The default setting is for protection level 1.
2. Default Settings
• The operating mode will change to Setting Mode.
• The parameters will change to their default settings.
• All branch outputs will be changed so they are not connected.
• The protection level will change to level 1.
Waiting display, 1 s (operation executed)
Waiting for connection (branch output 1 is OFF)
Waiting for cutoff (branch output 1 is ON)
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Changes after the
waiting display.
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The all branch outputs will be connected if the Mode
Key ( ) is pressed in this status.
Confirm that the status indicators for all branch outputs
light green.
The all branch outputs will be cut off if the Mode Key
( ) is pressed in this status.
Confirm that the status indicators for all branch outputs
go OFF.
Note: Indicator Status Notation
: Lit : Flashing
Protection
Level
Intended for Possible operations
0 Facility designers
and manufacturers
All settings can be read and
changed.
1 Facility maintenance
personnel
Some settings can be read and
changed.
2 On-site operators Settings can be read but not
changed.
Setting Protection Level
Mode Selection Menu
(Protection Level)
After no key
operations for
3 s
Run Mode
Set value saved
(flashes for 3 s)
Parameter Initialization
Mode Selection Menu
(Parameter Initialization)
After no key
operations for
3 s
Run Mode
Setting Confirmation
(Flashes for 3 s.)
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