Recently, uncle bought one cheap surge protector powerstrip from MR DIY store at RM24 something?

But, to uncle dismay, the MOV is installed at wrong place. As the result, only one socket is protected from possible surge while the other three are not.

Some pictures below (large image):



Searching around the net for the MOV model returned:

https://www.sunrom.com/p/10d471k-varistor-mov-for-220v-ac


Data from https://www.sunrom.com/get/559199 seem to indicate:

Aside from the wrong MOV placement in the powerstrip, the MOV itself is fine for its intended purpose.
How in the world this thing qualify as surge protector when it only protect one socket out of four sockets?

SIRIM tengah tidur ke?

Parking

Abang engineet bole tau bape gaji abang?

wat is mov

SIRIM bayar only. No need test also pass.

wow got sirim sticker

From eyeballing the innards seems like the singlr mov protects all sockets (when individual sockets switched on). Look at the common N and L rails.

Then again I'm not an electronic circuitry expert.

The MOV is being installed across Line and Neutral which is correct. Since this is a single phase socket array, all the 3 (Line Neutral and Ground) are shorted together via the copper busbar. Therefore the potential differences between the sockets should be negligible.

More expensive surge arrestors will have MOV across line-line, line-neutral, neutral-ground and line-ground. Obviously this Mr DIY is just a extra precaution instead of full protection~ better than nothing i suppose haha

movie file format

Sirim keje diamond lekat sticker saja

for sensitive item, get AVR please.

Mr DIY items are cheap because they don't last. I usually buy them for emergencies. They do stock branded ones but quite expensive.

Wah, who pass the sirim cert??

Kena liao.

mr diy start selling branded items already, you can see philips and pentene there.
also hotak sets is good enough for my usage too. their single piece of screw driver oso good as well.

erm..................

ts bodo

Yes, I know about those three lines protection.

In MR DIY powerstrip, if there is power surge and all four switches are turned on, only Green socket will be protected from surge while the Blue, Orange and Red sockets will be hit by surge.

In this case, the MOV should be installed as shown below in red line (Point of entry):

This way, all four sockets will be protected from surge coming from Live wire by redirecting surge to Neutral wire out.
I have no idea why the MOV is installed that way protecting only one socket and still pass SIRIM.

U get what u paid la

Wadeyer expect from rm24 item, furthermore its mr diy

Report to SIRIM!

wanna beter protection, better buy Cal Lab