Would you bother / is it necessary to use a motor starter switch with
overload protection on a 240V 6.5A single phase motor.

Main reason for asking is that i'm struggling to find something suitable.

On Wed, 10 Oct 2018 17:42:32 +0100, R D S wrote:

Would you bother / is it necessary to use a motor starter switch with
overload protection on a 240V 6.5A single phase motor.

Main reason for asking is that i'm struggling to find something suitable.

So circa 2HP? yes

A contactor for no volt release plus an overload relay plugged in the bottom of
the contactor and just set to your selected trip current

https://uk.rs-online.com/web/c/autom...lay-overloads/

There might be some app notes there for the basic setup for the start & stop +
emergency stop push buttons and how to latch the contactor
--

What is the starting current and is it within design limits under load. if
not then what you do need is some kind of pulsed duty cycle starter of some
kind from memory.
Brian

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"R D S" wrote in message
news
Would you bother / is it necessary to use a motor starter switch with
overload protection on a 240V 6.5A single phase motor.

Main reason for asking is that i'm struggling to find something suitable.

Hmm so I suspect that is how to protect things but not actually starting it
very well. May be wrong of course.
Brian

--
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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"The Other Mike" wrote in message
news
On Wed, 10 Oct 2018 17:42:32 +0100, R D S wrote:

Would you bother / is it necessary to use a motor starter switch with
overload protection on a 240V 6.5A single phase motor.

Main reason for asking is that i'm struggling to find something suitable.

So circa 2HP? yes

A contactor for no volt release plus an overload relay plugged in the
bottom of
the contactor and just set to your selected trip current

https://uk.rs-online.com/web/c/autom...lay-overloads/

There might be some app notes there for the basic setup for the start &
stop +
emergency stop push buttons and how to latch the contactor
--

On Wed, 10 Oct 2018 19:15:57 +0100, "Brian Gaff"
wrote:

Hmm so I suspect that is how to protect things but not actually starting it
very well. May be wrong of course.
Brian

A 240v single phase motor should be fully integral with regards to starting at
that power level (centrifugal switch, capacitor for phase shift on the starter
windings)

Control:
Live via a normally open pushbutton to energise the coil on the contactor,
auxillary normally open contact on contactor wired across start switch to latch
the start control

Normally closed stop switch in series fron the other side of the coil on the
contactor back to neutral (add a normally closed emergency stop switch in
series if reguired)

Motor Feed:
Live and neutral to a pair of contacts on the contactor

The other side of the contactor contacts go via the overload relay to the motor

Millions of them in service essentially set up like that
--

On 10/10/2018 17:42, R D S wrote:
Would you bother / is it necessary to use a motor starter switch with
overload protection on a 240V 6.5A single phase motor.

Main reason for asking is that i'm struggling to find something suitable.

https://www.tlc-direct.co.uk/Main_In..._Less_Overload

or for cheap and "ok"

https://www.machinemart.co.uk/p/dol-starter-4-6-3-amp/

https://www.machinemart.co.uk/p/dol-starter-6-3-10-amp/


--
Cheers,

John.

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