[GreenKeys] Solid State Motor Control Relay

[ad7i]

Great, thank you.

Paul


On Sun, Dec 27, 2020 at 10:06 AM Steve Garrison <steve.n4tty at gmail.com>
wrote:

> Those are the same type SSRs that I’ve been using in conjunction with Jack
> Hart’s (K2TTY) motor control board for some time.
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> I even have one mounted inside an LESU on a model 28KSR along with the
> motor control board on the underside (with LESU in normal working
> orientation) of a blank removable LESU plate.  No issues, never even
> noticed any heat from the relay.
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> Steve G./N4TTY
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>
> *From:* greenkeys-bounces at mailman.qth.net <
> greenkeys-bounces at mailman.qth.net> *On Behalf Of *ad7i
> *Sent:* Sunday, December 27, 2020 9:40 AM
> *To:* greenkeys <greenkeys at mailman.qth.net>
> *Subject:* [GreenKeys] Solid State Motor Control Relay
>
>
>
> Greetings Greenkeyers --
>
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>
> Has anyone tried to use a Solid State Relay (SSR) such as that shown below
> to control a TTY motor?
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> https://www.ebay.com/itm/1Pcs-Solid-State-Relay-SSR-40DA-SSR-25DA-3-32VDC-TO-24-380VAC-New/312717019695
>
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>
> I'm using two of these solid state relays on dehumidifiers in my basement,
> so that the safety switch in the condensate pump can interrupt the AC power
> to the dehumidifier if the pump can't pump.  The SSR's electronic
> "contacts" have the equivalent of two diode drops in series with them, so
> that at 1 ampere of AC current passing through the relay contacts will
> dissipate about 1.5 watts.  I have my humidifier SSRs mounted on a small
> heatsink but I think it's overkill for that application.
>
>
>
> But I'm wondering if SSRs, in general, would be suitable for a TTY motor.
>
>
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> The alternative for me is an old school mechanical contact relay, in
> particular:
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> https://www.mouser.com/datasheet/2/418/5/NG_DS_T9G_1216_1117-1281449.pdf
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> Please let me know what you think about using an SSR for a TTY motor.
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> thanks,
>
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> Paul, ad7i
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