Ordering - GE L90 Instruction Manual

2.1 INTRODUCTION
• Two-element time overcurrent and 2-element instantaneous overcurrent negative-sequence overcurrent protection
• Undervoltage and overvoltage protection
ADDITIONAL PROTECTION:
• Breaker failure protection
• Stub bus protection
2
• VT and CT supervision
• GE "sources" approach allowing grouping of different CTs and VTs from multiple input channels
• Open pole detection
• Breaker trip coil supervision and "seal-in" of trip command
• FlexLogic™ allowing creation of user-defined distributed protection and control logic
CONTROL:
• 1 and 2 breakers configuration for 1½ and ring bus schemes, pushbutton control from the relay
• Auto-reclosing and synchrochecking
• Breaker arcing current
MONITORING:
Oscillography of current, voltage, FlexLogic™ operands, and digital signals (1 × 128 cycles to 31 × 8 cycles config-
•
urable)
• 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:
• RS232 front port: 19.2 kbps
• 1 or 2 RS485 rear ports: up to 115 kbps
• 10BaseF Ethernet port supporting IEC 61850 protocol
The relay is available as a 19-inch rack horizontal mount unit or a reduced size (¾) vertical mount unit, and consists of the
following modules: power supply, CPU, CT/VT, digital input/output, transducer input/output, L90 Communications. Each of
these modules can be supplied in a number of configurations specified at the time of ordering. The information required to
completely specify the relay is provided in the following table (see Chapter 3 for full details of relay modules).
2-4 L90 Line Differential Relay
2 PRODUCT DESCRIPTION

2.1.3 ORDERING

GE Multilin