Fiber: Led And Eled Transmitters; Fiber Laser Transmitters - GE L90 Instruction Manual
Line current differential system
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Also See for L90:
- Instruction manual (832 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (470 pages)
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PILOT CHANNEL COMMUNICATIONS
All of the fiber modules use ST type connectors. For two-terminal applications, each L90 relay requires at least one
communications channel.
The current differential function must be "Enabled" for the communications module to properly operate. See the
SETTINGS GROUPED ELEMENTS LINE DIFFERENTIAL CURRENT DIFFERENTIAL
The fiber optic modules (7A to 7W) are designed for back-to-back connections of UR-series relays only. For
connections to higher-order systems, use the 72 to 77 modules or the 2A and 2B modules.
3.4.1 Fiber: LED and ELED transmitters
The following figure shows the configuration for the 7A, 7B, 7C, 7H, 7I, and 7J fiber-only modules.
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3.4.2 Fiber laser transmitters
The following figure shows the configuration for the 72, 73, 7D, and 7K fiber-laser modules.
The following figure shows configuration for the 2I and 2J fiber-laser modules.
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Figure 3-31: LED and ELED fiber modules
Figure 3-32: 7x Laser fiber modules
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INSTALLATION
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