ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AFDD's coming to the UK
by Texas_Ranger. 02/18/19 02:04 PM
Israel
by Texas_Ranger. 02/18/19 02:01 PM
250.104
by gfretwell. 02/16/19 01:08 PM
PurpleAir Recalls Power Supply Units
by Admin. 02/14/19 08:43 PM
Utility Company Programs
by katty81. 02/14/19 11:11 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
1 registered members (gfretwell), 10 guests, and 28 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Octal Relays #150912
01/12/06 03:52 AM
01/12/06 03:52 AM
R
RODALCO  Offline OP
Member
Joined: Dec 2005
Posts: 857
Titirangi, Akld, New Zealand
Why do we have 2 different pin configurations for the plug in octal relays 2 pole double throw c/o contacts and what problems have these caused by plugging in and forgotten to check.

We use them a lot in our 33/11 kV substations for alarms and the like.

here in NZ Email relays have 3 - 6 to the coil.
European relays 2 - 7 to the coil.


The product of rotation, excitation and flux produces electricty.
Arc Flash PPE Clothing, LOTO & Insulated Tools
Re: Octal Relays #150913
01/12/06 07:15 AM
01/12/06 07:15 AM
N
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Strange.

Have never seen an octal relay with anything other than 2+7 for the coil here in the US.

Apparently a holdover from the days of octal vacuum tubes, where 2+7 were (almost always) the heater/filament pins.

Re: Octal Relays #150914
02/16/06 08:31 PM
02/16/06 08:31 PM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,260
SI,New Zealand
Posted for RODALCO:

Quote
Today had something different from the usuall utility jobs.

I had to liven up the mining transformers for the Puhoi tunnel on SH 1 North of Orewa.

do voltage and rotation, polarity checks etc.

Also fit data loggers because of possible voltage dips.

Northern gate way alliance are drilling through one of the hills to ease our northern traffic flow.

11 kV supply to 3 x SDF fuse switches.

750 kVA 11000 -- 240 / 415 Volts
500 kVA 11000 -- 240 / 415 Volts
600 kVA 11000 -- 433 Volts ( 250 P - N )
1000 kVA 11000 -- 1050 Volts for drilling machine

Had to do the SD switching as well as operating all the mining switchgear.

got some piccies if you are interested.

Cheers

Raymond RODALCO


The Email octal relay. We have these in 24Vdc, 110Vdc and ac and 240Vac with these pin configurations:

[Linked Image]

Substation drawing from substation alarms:

[Linked Image]


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Posts: 165
Joined: March 2007
Show All Member Profiles 
Top Posters(30 Days)
Admin 7
Popular Topics(Views)
253,245 Are you busy
189,886 Re: Forum
179,597 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.026s Queries: 14 (0.004s) Memory: 0.9525 MB (Peak: 1.0773 MB) Zlib enabled. Server Time: 2019-02-19 07:21:03 UTC