RFL offers a wide range of Hybrid equipment for a complete Power Line Carrier solution. These products include Balanced, Skewed, Splitter and Combiner Hybrids.
- RFL Power Line Carrier Hybrid Pro™ System
- About Hybrids
- Example Applications and Recommended Configurations
- Hybrid Types
RFL Power Line Carrier Hybrid Pro™ System
- Single-card module design for ease-of-use.
- Front BNC test points eliminate the need for adapters.
- Improved port labeling for easy identification.
- Convenient reflected power meter connections to eliminate circuit interruption during testing.
- Space-saving Splitter, Splitter/Combiner, and Bypass hybrids occupy one chassis slot.
Hybrids are passive devices used to couple power line carrier (PLC) signals to/from the transmission line for relay protection communication channels. The hybrids are the interface between PLC transmitters and receivers in the control building and the line tuner in the switchyard. They are installed in a 1RU chassis which is typically installed next to the transmitters/receivers. Generally, hybrids perform two basic, simultaneous functions:
Isolate transmitters from transmitters, or transmitters from receivers
- Prevent transmitters from loading/interfering with each other
- Prevent local transmit signals (high level) from appearing as noise to local receive signals (low level)
Combine and split signals to set them up for the appropriate line coupling scheme
- Onto one coax cable for single-phase-to-ground coupling
- Onto two or three coax cables for phase-to-phase and 3-phase (mode 1) coupling
An ideal hybrid would perform these functions at no cost. However, a price is paid – a loss of signal power through the hybrids. The most common hybrid names are also a description of their loss characteristics: a balanced hybrid is so named because the losses are “balanced” (equal), while in a skewed hybrid the losses are “skewed” (unequal). Hybrid design and PLC channel design must take these losses into account to minimize their effect on the channel performance. Improper application of hybrids will result in excessive channel losses, inadequate isolation between channels, or both.