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345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
S1 RELAY SETUP
CHAPTER 6: SETPOINTS
passwords consist of 3 to 10 alphanumeric characters. The Local and the Remote
passwords are initially set after entering in a Master Reset Password (MRP). The Master
Reset Password (MRP) is set to “NULL” when the relay is shipped from the factory. When the
MRP is programmed to “NULL” all password security is disabled.. The remote user may
choose to allow the local user to change the local passwords.
Each interface (RS485, Ethernet, USB, and front panel keypad) is independent of one
another, meaning that enabling setpoint access on one interface does not enable access
for any of the other interfaces (i.e., the password must be explicitly entered via the
interface from which access is desired).
The EnerVista SR3 Setup software incorporates a facility for programming the relay’s
passwords as well as enabling/disabling setpoint access. For example, when an attempt is
made to modify a setpoint but access is restricted, the program will prompt the user to
enter the password and send it to the relay before the setpoint can actually be written to
the relay. If a SCADA system is used for relay programming, it is up to the programmer to
incorporate appropriate security for the application.
Aside from being logged out of security, which allows the user to read setpoints and actual
values only, three levels of security access are provided: Setpoint Level, Control Level, and
Master Level. The Setpoint and Control Levels can be attained either locally using the Local
passwords (USB port and keypad), or remotely using the Remote passwords (RS485 and
Ethernet ports). The user can have either Setpoint or Control Level active, but not both
simultaneously from the same interface. The Master Level is used for setting and resetting
of passwords, and includes all Setpoint and Control Level access rights. The Master Level
cannot be attained from the keypad. The Master Reset Password must be 8 to 10
characters in length, and must contain at least 2 letters and 2 numbers. The Master Level
can define whether the local user is permitted to change Local Passwords without having
to enter the Master Level. The Master Reset Password is encrypted, and is not viewable
from the keypad. If the Master Reset Password is lost, the user should contact the factory
to decrypt the Master Reset Password.
After password entry, the access level is maintained until a period of 5 minutes of inactivity
has elapsed, after which the password must be re-entered. A power-loss or entering in the
wrong password will log the user out of security.
Further definition of the access levels is described as follows:
SETPOINT LEVEL
•
Changing settings under QUICK SETUP menu
•
Changing settings under the SETPOINTS menu except the features requiring control
access listed below
•
Changing any setting under MAINTENANCE such as trip and close coil monitoring and
breaker maintenance settings, except the features requiring control access listed
below
•
Changing the Local or Remote Setpoint Password, depending on the interface being
accessed
CONTROL LEVEL
•
Reset command
•
Open and Close Breaker commands
•
Virtual Input commands
•
Clearing of event records, transient records, and other data
•
Uploading new firmware
•
Changing the Local or Remote Control Password, depending on the interface being
accessed
MASTER LEVEL
•
Setting and changing of all passwords including the Master Reset Password
