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Form to calculate temperature rise based on input conditions.

Project Information

Your Customer / Plant / Project(Required)

Your Enclosure ID(Required)

Enclosure Information

Select Enclosure Size

Product Selector

Input Your Dimensions

Enclosure Selector

RangeMaterialHeight (mm)Width (mm)Depth (mm)Part No.

Enclosure drawing shows the “working area” of the enclosure only and does not show the sloping roof.

Calculations for sloping roof enclosures are approximate only.

Would you like us to provide a price for that enclosure?

Yes, email me a price

First Name

Last Name

Company Name

Phone

Post Code

Enclosure Orientation

Select Horizontal if enclosure mounted on its side eg. rotated 90°.

Height (mm)

Please enter a number from 100 to 2300.

Height (mm) – 100 to 2300mm

Width (mm)

Please enter a number from 100 to 1200.

Width (mm) – 100 to 1200mm

Depth (mm)

Please enter a number from 100 to 800.

Depth (mm) – 100 to 800mm

Enclosure width exceeds 1.5m. Reduce enclosure width or divide enclosure into fictitious sections before recalculating.

Effective cooling surface area exceeds 11.5m². Divide enclosure into fictitious sections before recalculating.

Horizontal Partitions

Select number of horizontal partitions (shelves) that restrict air movement.
No more than 3 horizontal partitions are permitted.
If enclosure has external ventilation openings. Each partition requires at least 50% open area.

Ventilation Openings

Yes

If the enclosure has vents for passive ventilation, Select Yes and type in open area of vents.

For effective passive ventilation, place vents near the top and bottom of the enclosure, ideally on opposite sides, to allow airflow.
Ventilation opening must have an IP rating of IP4X or lower. Neglect ventilation openings if IP ratings are higher than IP4X and set the Ventilation Opening above to “No”.
Add the open cross sectional area of your vents into the fields below.

Air Inlet (cm2)(Required)

20cm² minimum, 1200cm² maximum.

Air Outlet (cm2)(Required)

20cm² minimum, 1200cm² maximum.

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Ratio Inlet to Outlet size

Air outlet is smaller than the air inlet. It should be the same size or bigger.

Type of Installation

Is this enclosure installed by itself or bayed with another enclosure?
Where there is >50mm separation between a wall or object and the enclosure, the enclosure is considered detached.

Ambient Temperature

Ambient temperature is the maximum ambient temperature outside of the enclosure averaged over a 24 hour period. If ambient temperature is unknown use 35°C.
Refer to the Australian Government – Bureau of Meteorology for historical 24 hour averages. NOTE: this website is ‘http’ only, so you will get security warnings.

Exposed to Direct Sunlight

Yes

Enclosures mounted indoors or protected from direct sunlight with a roof or walls are not considered exposed to direct sunlight.

What is the enclosure finish?

Pearl White

Light Grey – RAL7035

Stainless Steel Natural

Pebble Grey – RAL7032

Smoke Blue – T33

Storm Grey – N42

French Blue – B21

Orange X-15

Signal Red

Black

For details see our standard paint finishes

Note that this calculation takes no account of enclosure installation location, orientation, position or exact colour. Detailed calculation of temperature rise due to the effects of the sun on particular enclosures or colours is beyond the scope of this application.

Internal Components

Switching Devices Installed

Yes

Any device which has power losses proportional to I². For example, MCCB’s, terminals, power contacts of contactors, etc.

+ Add New Device

Switching Devices

Device

Rated (A)

Poles

Pole (W)

Actual (A)

Device (W)

Cable (W)

Qty

Total (W)

Electronic Devices Installed

Yes

Any device which has predominantly fixed losses. For example, power supplies, electronic components, contactor coils, etc.

+ Add New Device

Electronic Devices

Device

Power (W)

Cable (W)

Qty

Total (W)

Calculations return a negative temperature rise result. Reduce ventilation openings, increase enclosure size or add switching or electronic devices.

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Calculated Values (for reference)

This is just temporary for refenence.

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Effecting Cooling Area of Enclosure (m2)

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Sair

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Conducture length default

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Standard Conductor Length

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Switching Device Power Dissipation

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Electronic Device Power Dissipation

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Total Power Dissipation

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Temperature Rise Due to Sun

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Effective Temp In

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Temp Rise Mid

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Temp Rise Top

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Temp Rise 3/4

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Temp Rise Base

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Temp Mid

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Temp Top

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Temp 3/4

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Temp Base

Consent(Required)

I accept the terms of use.

How do I know if the internal temperature is too hot?

The maximum allowable temperature inside and enclosure is dependent on the equipment within the enclosure. Every piece of equipment (like a circuit breaker, battery, or electronic component) has a maximum ambient temperature that it can safely handle. This information is usually provided by the manufacturer in the equipment’s manual or datasheet as the ‘operating temperature range’ or ‘ambient air temperature for operation’.

The maximum temperature in your enclosure is °C.

Maximum ambient temperatures of equipment

Typical maximum ambient operating temperatures for continuous operation:

Electronic components: Typically up to 85°C.
Current Transformers: Up to 50°C.
Standard industrial equipment: Typically up to 55 ~ 70°C.
Terminals: Up to 70°C .

Always check the manufacturer’s documentation for your specific equipment.

How to reduce internal ambient temperature

The temperature inside the enclosure is typically reduced using one or more of the following methods.

Increase the enclosure size (above).
Increase or add ventilation (above).
Reduce operating current of equipment (above).
Increase equipment size (eg. Increase frame size of an MCCB).
Increase cable size (above).
Add a fan or air conditioner.
Add sunshades if exposed to direct sunlight (above – assume not in direct sunlight).
Reduce the external ambient temperature if possible (above).