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2.3 SECURITY
2.3 SECURITY
Note that the relay is defaulted to the Setpoints Not Programmed state before it leaves the factory. This safe-
guards against the installation of a relay whose setpoints have not been entered. In addition, a relay in the Not
Programmed state blocks signaling of any output relay, and turns off the IN SERVICE indicator.
745 SETPOINTS:
2
Not Programmed
To guarantee that the relay settings cannot be tampered with, the user may setup the passcode security fea-
ture.
a) CHANGING THE PASSCODE
SETPOINT ACCESS:
Read & Write
CHANGE PASSCODE?
No
CHANGE PASSCODE?
Yes
PLEASE ENTER CURRENT
PASSCODE:
PLEASE ENTER A NEW
PASSCODE:
PLEASE ENTER A NEW
PASSCODE:SSS
PLEASE RE-ENTER NEW
PASSCODE:
NEW PASSCODE
HAS BEEN STORED
CHANGE PASSCODE?
No
ALLOW ACCESS TO
SETPOINTS? No
2-6
Move to the S1 745 SETUP \ INSTALLATION \ 745 SETPOINTS message. To put the
relay in the Programmed state, press the
. Enter Yes for the ARE YOU SURE? message. The front panel IN
press
E N TE R
SERVICE indicator will now turn on.
Move to the S1 745 SETUP \ PASSCODE \ SETPOINT ACCESS message. This
message cannot be edited directly. It simply indicates whether passcode
security is enabled (SETPOINT ACCESS: Read Only), or passcode security is
disabled (SETPOINT ACCESS: Read & Write). Each relay is shipped from the
factory with setpoint access allowed. The passcode is also defaulted to '0',
which disables the passcode security feature entirely.
Press the
key once.
M E SSA G E
Press the
or
V AL U E
V AL U E
Press the
key to begin the procedure of changing the passcode. The
EN TE R
displayed message will change as shown. The current passcode is '0', so
press the '0' numeric key. The relay will acknowledge the key press by
displaying 'z'.
Press the
key.
E N TE R
For this example change the passcode to '123'. Press the appropriate numeric
keys in the ' 1 2 3 ' sequence. The message will change as the digits are
entered, with the end result being as shown.
Press the
key to store the new passcode and a confirmation message
E N TE R
appears. As a safety measure, the relay requires you to enter a new passcode
twice. This ensures the passcode has been entered correctly.
After pressing the appropriate numeric keys in the sequence ' 1 2 3 ', press
. This flash message appears momentarily on the display and confirms
E N TE R
the new passcode is stored in memory.
After a few seconds, the original display returns.
Press the
key. As soon as a non-zero passcode is entered, setpoint
M E SSA G E
access will automatically become restricted.
745 Transformer Management Relay
2 GETTING STARTED
2.3.1 INSTALLATION
or
V ALU E
V AL U E
2.3.2 PASSCODE SECURITY SETUP
key once.
GE Power Management
key once and
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