Some clarification on my last post:
There isn't a direct replacement for the GRZ relay since 1995, BUT Allentown still provides spare parts for this relay.
The Microshield is a 3-phase relay. The Micro51 is the better choice, and is about the same price as the GKC if you were interested in a...
It was manufactured in Allentown like busbar said. The suggested replacement as of 1994 was the GKC relay, but no zone sequence availability. Go to:
http://www.abb.com/substationautomation
Under solid-state relays, you will find the GKC. Check it out to see if it can meet your needs.
The...
