There are two principle advantages of charge comparison compared to current differential relaying:
1. Greatly reduced communications throughput providing enhanced reliability.
2. Precise channel delay compensation is not required, making the RFL 9300 the relay of choice for SDH
and SONET applications.
RFL Electronics Inc. June 10, 2002
RFL 9300DCDR
2
Figure 2. Typical three-terminal (3-pole) RFL 9300 System