Identify a relay?

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olc

Senior Member
Can anyone identify the relay in the photo? (there are actually 3)

The photo is of the low voltage side. It is installed on the side of a panelboard and controls a light circuit (inside the panelboard). The realy pokes through a hole in the side of the panelboard.


relays.jpg
 
olc said:
Can anyone identify the relay in the photo? (there are actually 3)

The photo is of the low voltage side. It is installed on the side of a panelboard and controls a light circuit (inside the panelboard). The realy pokes through a hole in the side of the panelboard.


View attachment 23035
Click to expand...

Are you referring to the silver cylinder with the red and blue wires at the top?
 
190602-1264 EDT

olc:

Could be a GE RR- type relay. About 60 years ago it might have been a Sq-D unit. About early 1960s Sq-D quit this business. These were both mechanically bi-stable (snap blade) with low voltage set and reset coils.

A picture of the other side would help. Cylindrical on the power side would imply Sq-D, squarish with rounded corners an older GE, and rectangular with screw terminals a new GE, likely RR-7.

You can not apply maintained power to the set and reset coils, they will burn up.

.
 
No yellow wire so likely old GE RR3. Shape of the other side and screw terminals or black 12 ga leads will tell for sure as per Gar's comments.

Think Gar once commented he thinks he and I are only ones here who wired our own houses with the GE low voltage system.
 
They were popular in some of the developments in my area in the 60's.
Fun to chase out, they electricians would install them in ceiling boxes, switch boxes and troughs.
A lot of them would burn out because home owners would paint or wall paper the momentary switch plate covers that caused them to stick in one position.
 
190602-1446 EDT

olc:

What was the purpose of your question? Has it failed and you need to replace it? Or you want to know how it works? Or just curiosity?

If it is what we assume, then an RR-7 is a suitable replacement, but way overpriced from a distributor.

Even today an RR-7 us an ideal device for many applications.

.
 
Aww, I was gonna say, "Yep, that's a relay, all right!" :(


There, I said it anyway. :D (In a good mood; ask me why.)
 
olc said:
Can anyone identify the relay in the photo? (there are actually 3)

The photo is of the low voltage side. It is installed on the side of a panelboard and controls a light circuit (inside the panelboard). The realy pokes through a hole in the side of the panelboard.


View attachment 23035
Click to expand...
That's a relay??
 
gar said:
190602-1446 EDT

olc:

What was the purpose of your question? Has it failed and you need to replace it? Or you want to know how it works? Or just curiosity?

If it is what we assume, then an RR-7 is a suitable replacement, but way overpriced from a distributor.

Even today an RR-7 us an ideal device for many applications.

.
Click to expand...

The existing relays control 3 light circuits with 2 sets three-way switches. The lighting is being replaced (including the circuits). It would be convenient to re-use the control.
 
190603-1514 EDT

olc:

A GE RR type relay is a single pole, single contact, and mechanically bistable device. Using two separate momentary coils this type of relay can be set or reset using any number of SPDT spring return to off switches in parallel.

There is no 3-way switch here, whatever that might mean.

If continuous full coil power is a applied to a coil it is likely to burn up.

.
 
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