CDG 36 Relay CURVES 1

[Neckinger]

Does anyone have the curvers for a GEC CDG 36 RELAY?
Thanks Simon

 

[fontwell]

I also require information on CDG36 relays. any idea what characteristic. I do know that the relay consists of 2 o/c and 1 e/f element all with hi-sets.

 

[DiscoP]

Contact your local ASLTOM supplier for the curves. They are contained in the CDG11/16 publication. From reason these publications are not on their website.

A CDG36 relay is a 3 pole relay with a standard inverse characteristic.

Please note a CDG36 does not include any high set elements.

If it did the model would be CDG66 (or CDG56 if hi-sets on the O/C only)

 

[RalphChristie]

Neckinger and fontwell,

Like DiscoP suggested, contact your local ALSTOM supplier, or search for ALSTOM on the internet. They've sent me a copy in pdf-format.

Also, see thread279-13401 (The formulas for the different curves stay the same, it is just the case number that change.)

It would be good if you can find someone who can cut the different curves with perspex, to use with a 3log paper. A company in South-Africa cut mine, and it is very handy to use when you are in the field.

Good luck
RCC

 

[DanDel]

My software (ETAP/Powerplot) has the curves for GEC CDG relays, including Normal Inverse, ST Inverse, LT, Very Inverse, Ex. Inverse, etc., curves, but does not indicate the number 36. I can set the curves up to any settings provided and email a .bmp or .wmf file, if this will help.

 

[DiscoP]

Dan Del

CDG36 is the same characteristic as CDG31 (or CDG11) - ie Standard Inverse

The difference between the two relay types is the tripping circuits. CDG*1 has one contact on the disc, CDG*6 has 2 contacts.

 

[Bung]

RalphChristie, I used an OHP slide and traced the curve onto it then cut it out. Didn't cost me a cent (other than an old and scratched slide well past its use-by date).


Bung
Life is non-linear...

 

[RalphChristie]

Bung

Certainly a person could do it yourself. I've tried it first with glass (not very successful, sides very sharp, breaks easily etc.) then I tried perspex. The problem to do it yourself is to cut the curve, people with cutting machines cut the curves very easily (at minimal cost) But yes, you're right, you can do it yourself.

Regards



RCC