250A Main switch module Spine is a 250A main switch module for ABB’s Fastline system boards. The module contains an Eaton NZM2 compact circuit breaker, which acts as both the main switch and the fuse.
The module includes integrated Spine hardware, which lets you monitor and control the worksite’s electrical network and energy consumption remotely.
The module takes up 3 module slots in the board and is manufactured in Finland.

250A Main switch module Spine – technical data

• Rated current: 250 A
• Module slots (width): 3
• Weight: 8.8 kg
• Width: 150 mm

Does this model suit your site? Add the product to the quote cart at the top of the page to get a quote.

250A Main switch module Spine on the worksite

Spine is a remote monitoring system. Measurement data is sent to the cloud service where it can be viewed on any device – nobody needs to travel to the site to read a meter.

The service shows electricity consumption, load distribution between phases, voltage drop and CO₂ emissions, among others. Predictive alarms can be set so a deviation is caught before it stops the work.

The same cloud service gathers every Spine unit on the site into one view, however many measuring points there are.

This model is rated 250 A. Size the equipment by the actual simultaneous load – the sum of the nameplate ratings almost always leads to oversizing.

The product occupies 3 module slots. Module slots are a limited resource, so the configuration is worth planning before ordering.

Where 250A Main switch module Spine is used

Typical sites are construction projects, renovations, industrial maintenance and event power. What they share is that the electrical supply is temporary and the conditions are demanding.

Temporary does not mean lighter requirements. Site equipment is exposed to dust, moisture, moving and mechanical stress in a way that fixed installations never are.

Check the load distribution between phases during use. Uneven distribution overloads one phase while the others run half empty, and the usual symptom is a fuse that keeps tripping.

250A Main switch module Spine – how to choose the right model

The equipment is chosen by rated current and outputs. Start by calculating the simultaneous load and the output types needed, and choose the model on that basis.

Other models of the same type are Spine Plug & Play 16A, Spine Plug & Play 32A, Spine Plug & Play 63A, Spine Plug & Play 125A, Spine for 16A-1250A centers with fixed input.

Other details that affect the choice: weight 8,8 kg. These are worth checking already at the quotation stage.

You can see the full range in the product group, and read about real-time monitoring on the Spine page.

Practical notes for use

Winter brings requirements of its own. Condensation forms when cold equipment is brought into the warm, and moisture inside the enclosure is a common reason for an RCD tripping with no visible cause.

Mark the equipment with the site details and keep a record of what is fed from where. On a site with several contractors that saves time at every fault-finding.

RCD protection is mandatory for socket outputs on a site. Its operation is tested with the test button at commissioning and at regular intervals afterwards.

250A Main switch module Spine – installation and maintenance

Installation and connection work is carried out by a qualified electrician. The equipment must be made dead before connection work, and the absence of voltage verified by measurement.

Place the equipment on level ground and so that it can be reached freely even when the site fills up with material. Material stacked in front blocks both use and emergency isolation.

Test the RCD with its test button at commissioning and at regular intervals afterwards. The test takes a second and is still almost always forgotten.

The unit weighs 8,8 kg. Take the weight into account when moving and lifting – damage is most often caused during transport, not in use.

Check the joints and fixings regularly during use. A joint that heats up is a sign of a fault and should be corrected before the fault spreads.

Safety and inspections

Site electrical installations are subject to the same requirements as fixed installations, and some of them are stricter. The equipment has to withstand moving, dust, moisture and mechanical stress for the whole project.

The installation is inspected at commissioning and regularly during use: enclosure, joints, the operation of the protective devices and the fact that live parts cannot be reached.

Damaged equipment is not repaired improvised on site. A cracked enclosure, a burnt terminal or a damaged socket is replaced – on a site a temporary repair almost always becomes permanent.

Document the configuration and any changes made. Up-to-date information on outputs and protection speeds up fault-finding and the next inspection.

Delivery and sizing help

We deliver the equipment together with the cables and the rest of the site power supply in one delivery, so the set is complete when it arrives on site.

Describe the whole site in your request for quotation: supply power, the outputs needed and the estimated length of the project. We size the set on that basis.

Use the product number 501310008 when ordering and when asking about spare parts. It identifies this exact model, which matters when the same series comes in several sizes.

We also help with the sizing. If you are unsure about the size or the number of outputs, ask us – equipment sized wrong costs more than equipment chosen right the first time.

Frequently asked questions

Which system does the module fit?

The module is designed for ABB’s Fastline system boards.

Which circuit breaker does the module have?

The module has an Eaton NZM2 compact circuit breaker, which also acts as the main switch and fuse.

Does the module include Spine remote monitoring?

Yes. The module comes with integrated Spine hardware as standard, letting you monitor and control the worksite’s electrical network and consumption remotely.

What is the product’s part number?

The part number is 501310008. You can use it for orders and quote requests.
Didn’t find the answer to your question? Add the product to the quote cart and our sales team will help — or open the chat in the bottom-right corner of the page.

What is the rated current of 250A Main switch module Spine?

The rated current is 250 A.

How many module slots does the product occupy?

The product occupies 3 module slots.

How much does the product weigh?

Weight: 8,8 kg.

Is a separate communication device needed?

No. Data transfer is built into the unit.

Do several measuring points appear in one view?

Yes. The same cloud service gathers all Spine units on the site into one view.

What is the product number?

The product number is 501310008. Use it in requests for quotation and spare part enquiries.

Who may install the product?

Installation is carried out by a qualified electrician. The requirements are explained in more detail on the Tukes website.

Request a quote for 250A Main switch module Spine

Explore other solutions among our Spine products.
Once you’ve found the right model, add it to the quote cart. You can collect several products in the cart and send the whole list in one request.

Request a quotation

Add to the quotation basket and send us your request – we will confirm availability and delivery time. You can see the full range in the product group.