IET logo
 
IET
Decrease font size
Increase font size
Topic Title: Replacing 3036 fuses in Wylex CU
Topic Summary:
Created On: 08 December 2009 05:28 PM
Status: Post and Reply
Linear : Threading : Single : Branch
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 08 December 2009 05:28 PM
User is offline View Users Profile Print this message



imdave

Posts: 82
Joined: 24 June 2008

Can you get a C Type breaker that will fit a board like this, I've asked in a couple of Wholesalers but they don't think so.
I just thought I'd ask here before I say it needs a board change.
 08 December 2009 05:38 PM
User is offline View Users Profile Print this message



perspicacious

Posts: 7239
Joined: 18 April 2006

"Can you get a C Type breaker that will fit a board like this, I've asked in a couple of Wholesalers but they don't think so.
I just thought I'd ask here before I say it needs a board change."


Will the use of a Type C circuit-breaker satisfy 411.3.2.1?

Most CU changes are sold on the basis of RCD protection

Regards

BOD
 08 December 2009 05:41 PM
User is offline View Users Profile Print this message



ChrisGilbert

Posts: 136
Joined: 12 January 2003

Originally posted by: imdave

Can you get a C Type breaker that will fit a board like this.


Simple answer without questioning your motive or need, is that Wylex catalogue only shows B Type.

 08 December 2009 05:49 PM
User is offline View Users Profile Print this message



imdave

Posts: 82
Joined: 24 June 2008

As the intended MCB would be a 32a Type C using table 41.3 the max earth fault loop impedance is 0.72ohms X rule of thumb = 0.54ohms.
The measured Zs is 0.28ohms so it will be OK
There is also an RCD already in the circuit
 08 December 2009 05:50 PM
User is offline View Users Profile Print this message



imdave

Posts: 82
Joined: 24 June 2008

Originally posted by: ChrisGilbert

Originally posted by: imdave



Can you get a C Type breaker that will fit a board like this.




Simple answer without questioning your motive or need, is that Wylex catalogue only shows B Type.


The motive is inductive load
 08 December 2009 05:59 PM
User is offline View Users Profile Print this message



perspicacious

Posts: 7239
Joined: 18 April 2006

"The motive is inductive load"

Is a 32 A Type C circuit-breaker more "tolerant" than a 30 A BS 3036 to "inrush"?

Regards

BOD
 08 December 2009 06:07 PM
User is offline View Users Profile Print this message



imdave

Posts: 82
Joined: 24 June 2008

Perhaps my thread title was misleading.
Someone had already changed the 3036's to Type B MCB's
now they trip when the inductive load is connected hence the thinking to go Type C
I know that it could be reverted to 3036 or even to 1362
but the guy wanted MCB's.

I suspect the answer is fuses or a new CU but I was just exploring possibilities.
Statistics

See Also:



FuseTalk Standard Edition v3.2 - © 1999-2014 FuseTalk Inc. All rights reserved.