Overvoltage/undervoltage protection relays

[assegayer]

Hi guys just wondering if anyone of you have any example of overvoltage/undervoltage relays that can be purchase online. I will not be using them in this country off course as the supply is fine. 3 phase ones and single phase

Iv had a look so far at these two but i feel like they are cheap quality but i may be mistaken. I basically need them one for a air con system, three phase motor, and single phase fridge

http://m.ebay.co.uk/itm/80A-Single-...r-Under-Voltage-Fast-Protection-/322483293109


RN-111M Module voltage monitoring relay undervoltage, overvoltage | eBay - http://m.ebay.co.uk/itm/RN-111M-Module-voltage-monitoring-relay-undervoltage-overvoltage-/201802632283?hash=item2efc5fcc5b%3Ag%3A2goAAOSwjDZYkVUK&_trkparms=pageci%253A3c0a83bf-4976-11e7-9d74-74dbd1801d83%257Cparentrq%253A7540865815c0ac8075f6e066fff875a9%257Ciid%253A1

 

[Marvo]

We usually use the Schneider Zelio range. The part code starts with RM... and they come in single and three phase.

RM17UBE15 - voltage control relay RM17-U - range 65..260 V AC/DC | Schneider Electric - http://www.schneider-electric.us/en/product/RM17UBE15/voltage-control-relay-rm17-u---range-65..260-v-ac-dc/

 

[davesparks]

Broyce controls make a range of protection relays that would suit your needs.

I'd strongly recommend not buying materials from eBay for a professional job.

 

[PEG]

Unless they are known items,from a trusted supplier,who just happens to use ebay.