Temporary power supply cabinet with meter 1250 A – designed for really large sites, the TPK 1250A control panel can be modified as needed during the ordering phase. The delivery time is approx. 6 weeks, so that the cabinet can be modified according to the customer’s needs. The cabinet is sturdy and has lifting loops and forklift pockets on the stand. Power supply, space allocation for the kWh meter and outputs are all behind lockable doors. The powder-coated 2 mm marine aluminium body material is corrosion-resistant. The cabinet has a 1200 A railing and current transformer measurement.

Temporary power supply cabinet with meter 1250 A on the worksite

A main distribution board is the first distribution point on a site. The service supply is brought into it, and power is fed onward from there to sub-distribution boards and to large individual loads.

The rating of the main board sets the ceiling for the whole site. An undersized main board cannot be worked around by adding sub-boards – the limit is in the supply.

This model is rated 1200 A. Size the equipment by the actual simultaneous load – the sum of the nameplate ratings almost always leads to oversizing.

Where Temporary power supply cabinet with meter 1250 A 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.

Temporary power supply cabinet with meter 1250 A – 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 Temporary power supply cabinet with meter 630A, Temporary power supply cabinet with meter 250 A, Temporary power supply cabinet with meter 160 A, Temporary power supply cabinet with meter 63 A, Temporary power supply cabinet with meter 400 A.

Other details that affect the choice: protection class IP44, short-circuit withstand Icf = 25 kA, RCD 30 mA ja 300 mA, supply cable 4 x 95-240, weight 425 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.

Temporary power supply cabinet with meter 1250 A – 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 425 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.

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.

Temporary power supply cabinet with meter 1250 A – technical data

Rated current	1200 A
Rated voltage	400 V (50 Hz)
Supply	1200 A (4 x 400 A)
Supply cable size	4 x 95-240
Fixed outputs	NH00 125A ja NH3 400A
Fuse outputs	3 x SLK 160 ja 4 x SLK 630
Residual current devices (RCD)	30 mA ja 300 mA
Short-circuit withstand	Icf = 25 kA
Protection class	IP44
Dimensions (H×W×D)	1683×1587×1277 mm
Weight	425 kg
Approvals	CE, EN 60 439-4

Frequently asked questions

What is the rated current of Temporary power supply cabinet with meter 1250 A?

The rated current is 1200 A.

Does the product have an RCD?

Residual current device (RCD): 30 mA ja 300 mA.

What is the protection class?

Protection class: IP44.

What is the short-circuit withstand?

Short-circuit withstand: Icf = 25 kA.

What are the dimensions?

Dimensions: 1683×1587×1277 mm.

How much does the product weigh?

Weight: 425 kg.

What supply cable is needed?

Supply cable: 4 x 95-240.

What approvals does the product have?

Approvals: CE, EN 60 439-4.

Who may install the product?

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

The requirements for electrical installations on worksites are explained in more detail on the Tukes website.

Request a quotation

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