## A New Power Line Carrier Book is Now Available at www.plcexperts.net

Jeffrey Brown reached out to help announce his new book, Power Line Carriers – Simplified: A Field Engineer’s Perspective [pullquote align=”normal” cite=”Jeffrey Brown – www.plcexperts.net”]I would like to Introduce your First and Last Book on Power Line Carriers. Everything a Field Engineer needs to Know when it comes to protecting

A New Power Line Carrier Book is Now Available at www.plcexperts.net

## Help with 27/47/59N Protection in an SEL-387E

A reader has requested some help for an upcoming project: I will be reviewing some relay testing that needs to performed shortly and I am trying to understand how the 27/47/59N (within a SEL 387E) relay function is being applied. The 387E provides the 87T function for the 115KV to

Help with 27/47/59N Protection in an SEL-387E

## What Electromechanical Relay Kicked Your Ass?

I’m writing a blog post to help people buy a protective relay test-set that’s right for their application. What electromechanical relays require the most VA, or compliance voltage, to test? I want to make a list so that buyers can look at their inventory and pull those relays out when

What Electromechanical Relay Kicked Your Ass?

## CT Primary Injection Ratio Testing Problems

Situation after CT Primary Injection: New 230kv breaker Testing CT’s, 4000/5, by high current injection injecting 80 amps A phase to ground the secondary leads are shorted in a junction box A-B-C-N / additionally a voltage is connected to test instrument form test set The secondary readings are A = 0.096

CT Primary Injection Ratio Testing Problems

## SEL-321 Out-of Step Protection Problem?

SEL 321 OSB upper tests fine, lower is no-op but 51g comes in any ideas? I’m oversight on a project, test company is using a Doble 6150 w/ RTS, I’m not very familair with RTS sdg

SEL-321 Out-of Step Protection Problem?

## ASEA RAGEA 27N Gen Neutral Undervoltage

I can not find up dated information on this relay. I am testing with a manta 5000. I put 60 vac 60 hz on leads 7 and 8 and the relay picks up. Then on lead 11 & 12 I put 180 Hz and bring up vac to 1.27 and

ASEA RAGEA 27N Gen Neutral Undervoltage