Category Archives for Featured

Current Transformer Testing (CT)

I wrote an article for the NETA World magazine in 2004 that covers several different manual techniques for Current Transformer Testing that should help even the most experienced technicians.  Here’s

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Testing Basler BE1-47N Negative Sequence Voltage Relays

Testing more complicated elements that use a percentage or ratio between values can be difficult if you cannot properly define all of the values in the equation.  It doesn’t help that different

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Real World Problem With an SEL-300G Synch-Check

Here is a story from one of our Customers at Manta Test Systems: “I had to troubleshoot a Schweitzer SEL-300G relay yesterday that had the (25) Sync-Check element enabled, but wouldn’t assert the

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SEL-451 and Frequency Testing Issue

A customer was having problems timing a SEL-451 with a delay setting of 8 cycles. He was measuring a 12 cycle delay when transitioning from 59.5 to 58.5 Hz. If you look at the spec sheet, the SEL-451 frequency

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Connect to a Electro Industries Futura+ Series CPU1000

Cable:        9-pin to 9-pin RS-232 Straight Through Software:   Futura+ Communicator Settings:     Default Settings Link:          Direct Connection Device Address: 0001 Communications

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What Relay Test Equipment Do You Use and Why?

This post is pretty old.  I suggest you check this post to get a better idea of my thoughts on test-sets.  https://relaytraining.com/what-is-the-best-protective-relay-test-set/ I understand Chris has

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Reset SEL relays to Factory Defaults

The DC Power supply to the relay quit in the middle of a setting download and when the power was restored, the relay EEprom failed.  I was able to communicate with the relay (at a different BAUD rate)

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Possible Winding Voltages Setup Issue With GE Multilin 745 Transformer Management Relay

This was a nice surprise for me.  Older versions of the SR-745 have a maximum voltage of 200kV.  If you use newer software to set the relay, it indicates a maximum voltage of 2000.0 kV.  If a voltage

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How to Connect to a Beckwith Electric M-3425 Relay

http://www.beckwithelectric.com/ Beckwith M-3425 Generator protection Cable: 9-pin to 9-pin RS-232 Null Modem Software: 3820A IPScom Communications Software Software Default Settings PC Port: Com1 (Varies

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How to Connect to a BE1-GPS100

  Basler GPS100 Relay   Cable: 9-pin to 9-pin RS-232 Straight through Software: Basler Bestcomms software for GPS100 Software Default Settings Comm Port: 1 Varies by Computer (Doesn’t

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How to Connect to a GE MIF Relay

http://www.geindustrial.com/cwc/product … lang=en_US MIF: http://www.geindustrial.com/cwc/product … lang=en_US Cable: 9-pin to 9-pin RS-232 Straight Through Software: GE_NESIS M+PC – http://www.geindustrial.com/publibrary/

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How to Connect to a GE LPS Relay

http://www.geindustrial.com/cwc/product … lang=en_US GE LPS http://www.geindustrial.com/cwc/product … lang=en_US Cable: 9-pin to 9-pin RS-232 Null Modem Software: EnerVista ALPS/LPS/LPS-O

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How to Connect to a GE MIV Relay

MIV: Cable: 9-pin to 9-pin RS-232 Straight Through Software: GE_NESIS M+PC – Software Default Settings Connection: Baud Rate: Direct Connection Port: 1 (Varies by computer) Parity: No Parity Data

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How to Connect to a GE DGP Relay with Testing Tips

http://www.geindustrial.com/cwc/products?famid=31&lang=en_US DGP: http://www.geindustrial.com/cwc/products?pnlid=6&famid=31&catid=168&id=dgp&lang=en_US Cable: 9-pin to 9-pin RS-232

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Question about QUADS for GE L90 and D60

This has been bothering myself and some of my employees for a while.  GE Quads are extended on the reach axis by the k factor of the relay, settings engineers that we have been working for are basically

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