System Config Menu - Siemens 7SG164 Ohmega 400 Series Manual

2.1 System Config Menu

This menu contains general settings which allows the relay to be configured. Press
display the settings.
Active Group
This is the settings group which is currently being used by the relay. This is not necessarily the same group as
those currently displayed.
CVT in use
If CVT's are used then this setting should be set to YES. This will give extra security to the protection during the
case of severe CVT transients. Due to this extra security, operation of the relay will be approximately 5ms slower
if CVTs are being used.
CT Ratio
This setting defines the turns ratio of the protection CT. This will allow the meter display to show the correct
primary current. This setting does not affect any protection functions.
VT Ratio
This setting defines the ratio of the protection VT. This will allow the meter display to show the correct primary
voltage. This setting does not affect any protection functions.
Alternate Setting Group (1..8)
It is possible to cause the relay to switch from one setting group to another on application of a signal to the Status
Input Use Alt Setting Grp. When this status input is energised, the relay will switch from whichever group is
currently active to the alternate group defined in this setting. The relay will revert to the previous active setting
group when the Use Alt Setting Grp Status Input is de-energised.
View/Edit Group
This is the settings group which is currently being displayed by the relay. This is the group which would be
changed if any setting is edited. This is not necessarily the same group as those currently in use.
Default Screens Timer
This is the time delay after which the relay will return to the default screen, if no keys are pressed.
Backlight timer
Defines the length of time for which the backlight for the LCD screen will remain illuminated after the last
keypress.
Change Password
The relay is provided with a password feature. If set it will prevent any un-authorised changes to any of the relay
settings. The password is a four character word once set it can be disabled by entering the new password
"NONE". Once a password has been set, the relay will display a 10 digit code in the Change Password setting. If
the password has been lost then an authorised person should contact a Siemens representative, quoting this 10-
digit code. This can be used to obtain the current password.
The password must be entered in order to alter any of the relay settings. Once the password has been entered,
the relay will remain "logged-in" for 1 hour. After this time, the relay password must be entered again before
settings can be changed.
Relay Identifier
The relay is supplied with a default identifier usually the relay type. This can be changed to any 16-digit identifier
to give any meaningful identification to the relay. e.g. feeder name or circuit number.
©2013 Siemens Protection Devices Limited
(1 ... 8)
(NO..YES)
(0:1..5000:5)
(1000:90..600000:130)
1
(1 ... 8) 1
(Off, 1-60 mins) 60
(OFF..60) 5
(Password)
(16 Character String)
7SG1641 Ohmega 402 60 Relay Settings
1
NO
2000¦1
132000¦110
min
NONE
OHMEGA 402-60
to open the menu and
Chapter 4 Page 9 of 20