DEMA CPM 310 G User Manual page 98

Password
CPM 310 G password feature is a security application
that prohibits unauthorized operation on the device,
including settings changes, function testing and circuit
breaker control. The password is a 4-digit word of
which default value is "0000". If no need for password
security is evaluated, the password can be left as the
default value; by doing this, all functions that require
password confirmation will be accesses by simply
confirming the appearing password on the password
screen. If the password is changed to provide
enhanced security, the edited password has to be
entered each time the confirmation screen appears,
otherwise, the operation will not be validated by CPM
310 G.
WARNING!
If a password is lost or forgotten, there is no way to
recover the password via CPM 310 G! In such a case,
the password reset process can only be done via PC
program. Remember that when passwords other than
"0000" is used and take appropriate precautions!
Symbol
System symbolization determines the notation style of
line & earth current. The options are "rstn" and "abce".
Active Group
Active Group
setting allows users to switch between the
two existing settings groups. The subject is examined
Settings Group Selection Menu
thoroughly in the
section earlier in this manual.
Phase Rotation
Phase rotation selection feature of CPM 310 G enables
the action of changing the secondary line cabling order
without re-cabling once the system is commissioned. In
the case of cabling the CT secondaries in wrong order
to CPM 310 G, problems like negative sequence or
broken conductor tripping even for healthy systems are
likely to occur. If this kind of cabling problem is
detected and intervention to the live cabling is not
Phase Rotation
possible, feature can fix the problem:
changing the default setting "RST" to "RTS" will resolve
the problem.
P/N
Operators can check the phase order using the
Measurements Menu
; if the I value is higher than the
2
I value, there is a phase order problem. ↺
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