The AM Forum
November 14, 2024, 07:17:47 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Identify - old house breaker or what?  (Read 3123 times)
0 Members and 1 Guest are viewing this topic.
w5hro
Guest
« on: July 06, 2010, 12:22:41 AM »

Just picked up this old knife switch box in an antique shop down in Santa Barbara yesterday.

The tag said it was an old circuit breaker maybe for a house. It has a glass cover that comes off via two twist nuts.  

Anyone ever seen or remember these? I thought I might use it to switch my antenna with the open wire line (ladder line) out into the garage.


* 01.jpg (471.45 KB, 1710x1000 - viewed 739 times.)

* 02.jpg (542.98 KB, 1825x1000 - viewed 794 times.)
Logged
W7TFO
WTF-OVER in 7 land Dennis
Contributing
Member
*
Offline Offline

Posts: 2495


IN A TRIODE NO ONE CAN HEAR YOUR SCREEN


WWW
« Reply #1 on: July 06, 2010, 12:38:55 AM »

Is a cutout device from a 3-phase commercial electrical meter panel.  Used to isolate each phase E & I  from CT's and PT's into the kWh meter. 

Still in use, most modern ones are really crappy. Tongue  Your older one is a cool switch for many uses. Wink

73DG
Logged

Just pacing the Farady cage...
N4LTA
Contributing
Member
*
Offline Offline

Posts: 1070


« Reply #2 on: July 06, 2010, 08:55:41 AM »

Yep - The switches keep the CT (current transformer) shorted while they are out of the meter circuit.

Otherwise you get an extremely high voltage when the CT tries to pump current through the open circuit - alot like a modulation transformer working into no load.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone © 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.103 seconds with 18 queries.