L30-J03-HKH-F8L-H6E-L6U | GE Multilin Digital Line Relay

Product Description

The GE Multilin L30-J03-HKH-F8L-H6E-L6U N67-SXX-UXX-W7C is a high-speed line current differential relay designed for secure transmission and distribution line protection. It delivers precise fault detection, breaker control, and adaptive reclosing for modern power systems. Moreover, its modular withdrawable case with flexible I/O simplifies installation and system integration. In addition, advanced communication protocols including IEC 61850, Modbus, and DNP3 enable seamless digital substation connectivity. The relay also provides IEEE C37.118-compliant synchrophasor measurements for wide-area monitoring, improving grid stability and operational efficiency. Cybersecurity features further safeguard against unauthorized access, ensuring reliable and resilient line protection.

Technical Specifications

Protection Functions

• Line current differential protection

• Phase and ground overcurrent protection

• Breaker failure protection

• Over/under voltage and frequency protection

Inputs/Outputs

• CT and VT inputs

• Configurable digital I/O

Communication Interfaces

• Direct fiber, RS422, G.703, C37.94

• Ethernet with IEC 61850, Modbus, DNP3

Synchrophasors

• IEEE C37.118 compliant measurements over Ethernet

Event Recording & Monitoring

• Oscillography and disturbance analysis

• Sequence of events (SOE) logging

Control Functions

• Breaker control, reclosing, interlocking

• Load shedding capabilities

Cybersecurity

• Role-based access control

• Secure protocols and audit trails

Power Supply

• 24–250 VDC / 48–240 VAC universal range

Operating Range

• Temperature: –40 °C to +70 °C

Dimensions & Weight

• 100 mm × 80 mm × 20 mm

• 5.0 kg

FAQ

Q: What type of line protection does this relay provide?
It provides line current differential, phase/ground overcurrent, and breaker failure protection.

Q: Which communication protocols are supported?
IEC 61850, Modbus, DNP3, RS422, C37.94, and direct fiber interfaces are supported.

Q: Does this relay provide synchrophasor measurements?
Yes, it delivers IEEE C37.118-compliant synchrophasor measurements over Ethernet.

Q: What is the operating temperature range?
The relay operates reliably between –40 °C and +70 °C.

Q: How is cybersecurity ensured?
Role-based access control, secure protocols, and audit trails protect against unauthorized access.