CHAPTER 5: SETTINGS PRODUCT SETUP
B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-5
5
5.3 Product setup
5.3.1 B90 function
SETTINGS PRODUCT SETUP B90 FUNCTION
The setting acts as a B90 master switch enabling certain relay elements. The features displayed vary with the selection of
"Protection" or "Logic." All features dependent on AC inputs (such as system setup, bus differential, instantaneous
overcurrent, time overcurrent, end fault protection, CT Trouble, AC metering, and undervoltage) become available if the
B90 FUNCTION is set to “Protection.” Features that are not dependent on AC signals (such as logic part of the Breaker Failure
protection or Isolator Monitoring) become available if the
B90 FUNCTION is set to “Logic.”
Typically, three IEDs in the B90 system have hardware configured to support AC inputs (set
B90 FUNCTION to “Protection”),
while the fourth IED is configured to support all required input contacts and is intended for isolator monitoring and other
logic functions (set
B90 FUNCTION to “Logic”).
The
B90 FUNCTION setting allows the user to work with a single setting file, program all required functions (both protection
and logic), download the same file to all the B90 IEDs, and modify the settings accordingly to finalize the application. This
means that some modules, for example CT/VT module when set to "Logic," can become unusable. Communications and
B90 FUNCTION settings are typically modified when downloading the common B90 setting file.
If hardware modules do not match the B90 order code, the minor self-test error "Discrepancy between order code and
h/w" displays. The B90 remains in service, and features are available as per detected hardware. If, for example, the B90
order code assumes 24 feeder configuration, but there are two DSP modules with 16 CT inputs, the B90 configuration
allows 16 current terminals in the
SETTINGS SYSTEM SETUP AC INPUTS CURRENT TERMINAL F1(S8) menu.
5.3.2 Security
5.3.2.1 Security overview
The following security features are available:
• Password security — Basic security present by default
• EnerVista security — Role-based access to various EnerVista software screens and configuration elements. The
feature is present by default in the EnerVista software.
• CyberSentry security — Advanced security available using a software option. When purchased, the option is
automatically enabled, and the default Password security and EnerVista security are disabled.
Lost password
If all passwords are lost, recovery is possible by resetting the unit to default values. Note that the relay is reset to default
values, not just the passwords.
To reset the unit after a lost password:
1. Email GE customer service at multilin.tech@ge.com with the serial number and using a recognizable corporate email
account. Customer service provides a code to reset the relay to the factory defaults.
2. Enter the reset code on the front panel, under
COMMANDS RELAY MAINTENANCE SERVICE COMMAND.
3. Change the default password of ChangeMe1# as outlined in the Set Up CyberSentry and Change Default Password
section at the end of the Installation chapter.
Password requirements
A user account requires an alpha-numeric password that meets the following requirements:
• Password is case-sensitive
UR FUNCTION
B90 FUNCTION:
Protection
Range: Protection, Logic
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