GE L30

2-4 L30 Line Current Differential System GE Multilin
2.1 INTRODUCTION 2 PRODUCT DESCRIPTION
2
• Breaker arcing current
MONITORING:
• Oscillography of current, voltage, FlexLogic operands, and digital signals (1 × 128 cycles to 31 × 8 cycles configurable)
• Events recorder: 1024 events
• Fault locator
METERING:
• Actual 87L remote phasors, differential current, channel delay, and channel asymmetry at all line terminals of line cur-
rent differential protection
• Line current, voltage, real power, reactive power, apparent power, power factor, and frequency
COMMUNICATIONS:
• Front panel RS232 port: 19.2 kbps
• Rear RS485 port: up to 115 kbps
• Rear 100Base-FX Ethernet port supporting the IEC 61850 protocol
2.1.3 SECURITY
The following security features are available:
• Password security — Basic security present in the default offering of the product
• EnerVista security — Role-based access to various EnerVista software screens and configuration elements. The fea-
ture is available in the default offering of the product and only in the EnerVista software.
• CyberSentry security — Advanced security options available as a software option. When purchased, the options are
automatically enabled, and the default Password security and EnerVista security are disabled.
Changing the password, or any other setting, does not take the relay out of service. The relay is taken out of service when
a settings file is written to it.
a) ENERVISTA SECURITY
The EnerVista security management system is a role-based access control (RBAC) system that allows an administrator to
manage the privileges of multiple users. This allows for access control of UR devices by multiple personnel within a substa-
tion and conforms to the principles of RBAC as defined in ANSI INCITS 359-2004. The EnerVista security management
system is disabled by default to allow the administrator direct access to the EnerVista software after installation. It is recom-
mended that security be enabled before placing the device in service.
Basic password or enhanced CyberSentry security applies, depending on purchase.
b) PASSWORD SECURITY
Password security is a basic security feature present in the default offering of the product.
Two levels of password security are provided: command and setting.
The following operations are under command password supervision:
• Operating the breakers via faceplate keypad
• Changing the state of virtual inputs
• Clearing the event records
• Clearing the oscillography records
• Clearing fault reports
• Changing the date and time
• Clearing the breaker arcing current
• Clearing the data logger
• Clearing the user-programmable pushbutton states