Digital Teleprotection __________________________________________________________________
RF-MCGARDPRO
Hubbell Power Systems, Inc.
–
RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
6-1
Digital Teleprotection
6.1
Teleprotection Applications
The primary GARD Digital Teleprotection System consists of four teleprotection (TPS) channels
located on the Display with TPS module. Each TPS channel can transmit and receiving eight
independent and simultaneous bi-directional commands over a single communications interface.
Each TPS channel utilizes its own addressing and channel delay measurements. Addressing and
Channel Delay measurements are sent and received with each message. Additional teleprotection
modules may be added for redundancy or when additional channels are needed. Functionality of
the TPS system is dependent on logic programming. Standard default logic is available to satisfy
most applications. For applications that are not covered in one of the default logics, custom logic
can be provided by RFL.
The Teleprotection Channel is fully programmable and is suitable for the following protection
applications:
•
Direct Transfer Trip
•
Permissive Transfer Trip
•
Directional Comparison Blocking
•
Directional Comparison Unblocking
Each of these is described on the following pages.
