The Siren Board

Discussion of Outdoor Warning Systems
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PostPosted: Mon May 13, 2019 1:19 am 
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Joined: Mon Dec 05, 2016 1:46 am
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Real Name: Kurt
YouTube Username: firefreak57
Location: Greene County, Ohio
Hey everyone,

As some of you know, the city of Independence, OH (in Cuyahoga County) has a variety of sirens including several 5AT's (technically 7AT's) and two Federal Enterprises Thunderbolt 1000's that were from the original CD system which went up in April 1952 around Cleveland and Cuyahoga Co.

Anyways the 5T's are wired up quite strangely. They are 480V 3 Phase.
They are almost like using transformers or something. Anyone know what these are? I've never seen such a weird wiring setup before. All of them are wired like this. I'd post more photos, but apparently for whatever reason, ARS won't let me post pics over 1 MB.
File comment: E Pleasant Valley Rd. 5A
[ attachment ]
IMG_3275.JPG [ 926.39 KiB | Viewed 538 times ]
File comment: E Pleasant Valley Rd. 5A
[ attachment ]
IMG_3276.JPG [ 943.81 KiB | Viewed 538 times ]

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firefreak57, Fire Alarm and Siren Enthusiast. 18, and now living in SW Ohio.
Proud owner of an ACA Allertor 125 Single Phase Control Cabinet.
My YouTube Channel | Summit County Siren Map | Cuyahoga County Siren Map


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PostPosted: Mon May 13, 2019 10:44 am 
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Real Name: Keith Foor
Location: Johnstown, Ohio
They are for the electric meter. They don't pass 480 through a meter like they do on lower voltages. These are basically a clamp current meter.


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PostPosted: Mon May 13, 2019 1:44 pm 
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Real Name: Kurt
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kb8vul wrote: *
They are for the electric meter. They don't pass 480 through a meter like they do on lower voltages. These are basically a clamp current meter.
So if that is for the electric meter, then how does the 480V 3 Phase power get to the actual siren?

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firefreak57, Fire Alarm and Siren Enthusiast. 18, and now living in SW Ohio.
Proud owner of an ACA Allertor 125 Single Phase Control Cabinet.
My YouTube Channel | Summit County Siren Map | Cuyahoga County Siren Map


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PostPosted: Mon May 13, 2019 2:38 pm 
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YouTube Username: Siren_Psycho
Location: Utah
The power is hooked up to the siren, and the black clamps you see go around the wire measure the current by measuring the magnetic field produced around the cable when the siren draws power.

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Partial credit given to Tboltmanic & TrainsAndSirens1 for some locations!
Tones are bad, mk?
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PostPosted: Mon May 13, 2019 5:26 pm 
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Real Name: Chuk Gleason
Location: Cary, NC
The true name for them is 'current transformer';

https://en.wikipedia.org/wiki/Current_transformer

basically, they provide a fixed ratio of current output to the measuring meter for a certain current thru the main conductor passing thru them; like 10:1
For every 10 amps of electrical current thru the main conductor (the big electrons) the meter will read it as 1 amp from the other leads of the transformer. This way, you can get away with a smaller (less expensive) electric power meter.


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PostPosted: Fri May 17, 2019 2:10 pm 
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Joined: Mon Dec 05, 2016 1:46 am
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Real Name: Kurt
YouTube Username: firefreak57
Location: Greene County, Ohio
Thanks for the help!
I’d attempt to film one again but these sirens seem to fail as the FC’s on them are either bad or they don’t receive the single tone strong that’s sent out and obviously since dispatch can’t tell what sirens activate or not and only send out one string, these sirens usually fail monthly tests. Nevertheless I’ll try and film one probably this summer.

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firefreak57, Fire Alarm and Siren Enthusiast. 18, and now living in SW Ohio.
Proud owner of an ACA Allertor 125 Single Phase Control Cabinet.
My YouTube Channel | Summit County Siren Map | Cuyahoga County Siren Map


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