Where to get good dc circuit breaker in UK?

[Sak]

Can anyone recommend a reputable brand or place where you can buy DC breakers, MCCB or MCB in UK?
I am a beginner and there are so brands and breakers on Amazon and EBay. It is so confusing.
They all look almost the same (to me)
If anyone can give tips how to spot a bad one or which brand to get?
On YouTube, some are using Noark but it does not seem to be available in UK.
At the moment I am using fuses from Littlefuse and Blue sea.
I saw some brands like Geya or Tomzn but I have not sure if they are good or safe.
Any helps would be much appreciated.

 

[pollenface]

What's your application? Current/voltage, perhaps someone can provide a link for your needs.

 

[kommando]

I use Tomzn after some research which found no problems and in use I also have had no issues.

 

[SeaGal]

Can anyone recommend a reputable brand or place where you can buy DC breakers, MCCB or MCB in UK?

I have no connection with the company, but would suggest Bimble Solar would be a good starting point for solar-related fuses, breakers, disconnects etc.

DC Breakers, Fuses & Enclosures

www.bimblesolar.com

I'd trust an established supplier over a 3rd party reseller on eBay or Amazon any day for critical, safety-related components.

 

[mikefitz]

At the moment I am using fuses from Littlefuse and Blue sea.

Apart for a DC disconnect for solar panels, I sugest you use quality fuses for over current protection in your DC system.
Buss bars incorporating fuses are available,

Victron Busbar To Connect 5 CIP100200100 - CIP100400060

High current copper bus bar for 5 circuits in parallel with modular mega fuse holder. Battery protection. Made by Victron this bus bar is rated at 1500A and connected up to 5 circuits in parallel with mega-fuse modular blocks. DOVETAIL FEATURE The dovetail feature allows interlocking multiple...

voltaconsolar.com

Victron Energy Lynx Power In

The Lynx Power In is a modular DC busbar used to connect batteries to the Victron Energy Lynx DC distribution system. Rated 1000A at 12, 24 or 48V DC.

www.12voltplanet.co.uk

For small systems,

Mega & Midi Fuse Power Distribution Box

Compact power distribution & fuse box that distributes power theough a single mega link fuse into 4 midi or strip link fuses.

www.12voltplanet.co.uk

For isolation , use switches,

Blue Sea Systems 6006 m-Series Mini On-Off Battery Switch with Knob - Red

m-Series 6006 Mini On-Off battery switch from Blue Sea Systems rated 48V max. & 300A. Suitable for harsh marine environments.

www.12voltplanet.co.uk

Almost all the DC breakers on ebay and Amazon are unreliable, overheat and have excessive volt drops. You can get Bluesea, Bussmann, breakers but are expensive,

Blue Sea Systems 285-Series Circuit Breaker - Panel Mount

285-Series panel-mount ignition protected IP67 manual trip & reset circuit breaker for safe use in marine environments around fuels. 25-150A ratings available.

www.12voltplanet.co.uk

Even with quality breakers there will be a greater volt drop compared with fuses, once you are over 150 amps this may be an issue.

For lithium battery main fuse, at 12v a MRBF in blue sea holder is acceptable, idealy and at 24 ot 48 volts, class T or HRC fused are needed,

Bussman Class-T Fuses

Fast blow Class-T fuses in 225-600A ratings for protecting cable in high power applications. e.g. where power inverters & lithium batteries are used.

www.12voltplanet.co.uk

As a newcomer to DC systems , breakers seem attractive, can be reset, however in practice the overcurrent protection will rarely operate.
DC breakers seem more common is US derived DC systems , unlike Europe where fuses are more common.

If you post some idea of your proposed system more specific suggestions can be given.

Mike

 

[Sak]

Apart for a DC disconnect for solar panels, I sugest you use quality fuses for over current protection in your DC system.
Buss bars incorporating fuses are available,

Victron Busbar To Connect 5 CIP100200100 - CIP100400060

High current copper bus bar for 5 circuits in parallel with modular mega fuse holder. Battery protection. Made by Victron this bus bar is rated at 1500A and connected up to 5 circuits in parallel with mega-fuse modular blocks. DOVETAIL FEATURE The dovetail feature allows interlocking multiple...

voltaconsolar.com

Victron Energy Lynx Power In

The Lynx Power In is a modular DC busbar used to connect batteries to the Victron Energy Lynx DC distribution system. Rated 1000A at 12, 24 or 48V DC.

www.12voltplanet.co.uk

For small systems,

Mega & Midi Fuse Power Distribution Box

Compact power distribution & fuse box that distributes power theough a single mega link fuse into 4 midi or strip link fuses.

www.12voltplanet.co.uk

For isolation , use switches,

Blue Sea Systems 6006 m-Series Mini On-Off Battery Switch with Knob - Red

m-Series 6006 Mini On-Off battery switch from Blue Sea Systems rated 48V max. & 300A. Suitable for harsh marine environments.

www.12voltplanet.co.uk

Almost all the DC breakers on ebay and Amazon are unreliable, overheat and have excessive volt drops. You can get Bluesea, Bussmann, breakers but are expensive,

Blue Sea Systems 285-Series Circuit Breaker - Panel Mount

285-Series panel-mount ignition protected IP67 manual trip & reset circuit breaker for safe use in marine environments around fuels. 25-150A ratings available.

www.12voltplanet.co.uk

Even with quality breakers there will be a greater volt drop compared with fuses, once you are over 150 amps this may be an issue.

For lithium battery main fuse, at 12v a MRBF in blue sea holder is acceptable, idealy and at 24 ot 48 volts, class T or HRC fused are needed,

Bussman Class-T Fuses

Fast blow Class-T fuses in 225-600A ratings for protecting cable in high power applications. e.g. where power inverters & lithium batteries are used.

www.12voltplanet.co.uk

As a newcomer to DC systems , breakers seem attractive, can be reset, however in practice the overcurrent protection will rarely operate.
DC breakers seem more common is US derived DC systems , unlike Europe where fuses are more common.

If you post some idea of your proposed system more specific suggestions can be given.

Mike

Thanks. I ll check them out and will post my design soon. In a nutshell, this is what I be got
PV 200w- 2 renogy 100w
Epever solar controller 3210
Battery DIY 280ah - 8 cells
JK Bms 8s 200A