Over voltage and lost neutral protection

**ians** · 12-Mar-20, 12:08 PM

Anyone tried these units... i see they have an interesting range of protection devices.

https://za.rs-online.com/web/p/surge...units/3115925/

**ELECT 1** · 12-Mar-20, 01:15 PM

Sounds like a very sophisticated power surge arrestor and expensive

**Derlyn** · 12-Mar-20, 07:00 PM

Hi Ian

Price a bit steep, but looks good. Haven't used this unit.

I have however used the Fridge Safe unit from Ellies rated at 5A together with a single pole contactor for more oomph.
This combination 25A works out at about R1200.

Cheers & peace out .... Derek.

**Justloadit** · 13-Mar-20, 06:38 AM

I have a product which is similar and way cheaper.

3P5WVSPC-005 - 3 Phase 5 Wire Voltage and Surge Protection Control

Easy to install
All 3 phases Voltage Monitoring
Phase sequence protection
Earth Voltage monitoring
Nuisance free Delay before trip
LED Indication of Status
Power on delay
Delay after each fault
Time Save Delay on each Fault
Surge protection on all phases
Surge protection between Neutral & Earth
LED indication of Surge Arresters operational
Designed for extra-long service life

See my brochure
3P5W Surge Protection.pdf

**Justloadit** · 13-Mar-20, 06:43 AM

Originally Posted by Derlyn

Hi Ian

Price a bit steep, but looks good. Haven't used this unit.

I have however used the Fridge Safe unit from Ellies rated at 5A together with a single pole contactor for more oomph.
This combination 25A works out at about R1200.

Cheers & peace out .... Derek.

Interesting some 10 years back a made a product which I sell into Mozambique and locally called a Fridge Guard, which works well. Have had it on my fridges and to date with all the power issues have not had a fridge failure. This included a holiday home in Limpopo which had major voltage issues.

The Fridge Guard comes in two low cost models for home , office or factory use. Namely a 16 Amp resistive (8 Amp inductive) and a 30 Amp resistive (20 Amp inductive load) versions.
Typical applications include, refrigerators, electric motors, electric mixers, sensitive control equipment, lighting equipment, etc.

3 coloured light emitting diodes provide positive feedback to the user, showing the status of the mains supply at all times.

Red - Over Volt, supply over 265Volts
Green- Under Volt, supply less than 186Volts
Flash Yellow - Wait to start, voltage within 186 and 265Volts
Yellow - Volt O.K., load connected to mains and voltage between 186 and 265Volts.
5 minute delay after voltage recovery or power up delay.

**GCE** · 13-Mar-20, 07:59 AM

ABB also do a din rail clip in voltage monitoring relay at 22,5mm wide at around 3K - You need to fit a contactor to match the load

**Justloadit** · 13-Mar-20, 10:21 AM

Originally Posted by GCE

ABB also do a din rail clip in voltage monitoring relay at 22,5mm wide at around 3K - You need to fit a contactor to match the load

My unit for a similar price includes surge protection

**ians** · 13-Mar-20, 07:16 PM

Originally Posted by GCE

ABB also do a din rail clip in voltage monitoring relay at 22,5mm wide at around 3K - You need to fit a contactor to match the load

I have a customer who only wants ABB products installed... What separates ABB from the rest is their circuit breakers have a dual terminal ...so you dont have to squeeze 2 wires in one terminal...you pay more but at least you get what you pay for.