ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/18/18 10:41 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
VDE 0100 to introduce AFCIs
by LongRunner. 01/17/18 10:32 AM
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 9 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
NZ HV Tap-Changer Unit #123898
06/05/06 11:43 PM
06/05/06 11:43 PM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Thanks to RODALCO for these pics and information:

Quote
The TCOL tapchanger (or Tap Changer On Load) is commonly used in the local POCO 33/ 66 kV substations for voltage regulation for the feeders which supply the end consumers.
In NZ it's mostly 11 or 22 kV feeders, in other countries similar systems will be used.


Atkinson sub. T2 TCOL box open, above small grey box is blank cap for manual crank handle on left.The actual load bearing contacts and resistors are in the grey tank underneath the header tank. The vertical shaft is the drive to the latter. This one is an ASEA 10000 kVA transformer:

[Linked Image]


Master / Follower control contacts drum. close up. Our POCO subs have 17 Tap positions:

[Linked Image]

TCOL of Ferranti 12.5 MVA transformer, the control contact drums are fully submerged in oil:

[Linked Image]

It's about 3 metres from crank to 33 kV bus:

[Linked Image]

Crank key hole:

[Linked Image]

Tapping voltages:

[Linked Image]

Transformer nameplate data:

[Linked Image]

Tools for Electricians:
Re: NZ HV Tap-Changer Unit #123899
06/07/06 07:55 PM
06/07/06 07:55 PM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Ray,
Any chance of getting a pic each of the circuit diagram of the transformer and the Tap Changer?.
Just for interests sake. [Linked Image]


Featured:

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

 

Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,890
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Admin 20
sparky 18
Potseal 14
Popular Topics(Views)
243,544 Are you busy
180,351 Re: Forum
170,832 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.011s Queries: 14 (0.003s) Memory: 0.9438 MB (Peak: 1.0609 MB) Zlib enabled. Server Time: 2018-01-19 07:34:48 UTC