---
title: "Adiabatic Equation Calculator - Reviews, Revenue and Downloads in United Kingdom | Apple App Store"
description: "Adiabatic Equation for calculating the minimum cpc (circuit protective conductor) and earth minimum csa sizes of earthing conductors, S = √(I²t) / k.  This Adiabatic Equation Calculator takes into acc"
---

# Adiabatic Equation Calculator — United Kingdom
> Adiabatic Equation Formula

![Adiabatic Equation Calculator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/cb/80/0b/cb800b94-64cf-a6cb-0f87-efaa11178ce7/AppIcon-1x_U007emarketing-0-11-0-85-220-0.png/434x0w.png)

**Developer:** [Pro Certs Software](https://apptail.io/developer/pro-certs-software-BpE) (United Kingdom)
**Category:** Productivity
**Rating:** 3.7/5 (3 ratings)
**Price:** £7.99
**Bundle ID:** com.procerts.adiabaticequation
**Store:** Apple App Store
**Country:** United Kingdom
**Version:** 2.1.5 (released 2025-08-02)
**Original Release:** 2020-05-05
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/gb/app/app/id1511222749)
**AppTail Page:** [https://apptail.io/app/adiabatic-equation-calculator-YHYb/united-kingdom](https://apptail.io/app/adiabatic-equation-calculator-YHYb/united-kingdom)

## Adiabatic Equation Calculator Description
Adiabatic Equation for calculating the minimum cpc (circuit protective conductor) and earth minimum csa sizes of earthing conductors, S = √(I²t) / k.

This Adiabatic Equation Calculator takes into account the following parameters:
t = Disconnection time (seconds).
k = Conductor k value (From BS 7671 tables).
la = Fault current (PEFC in Amps).
I² = la x la.
Results with the minimum CSA mm².

Values of K are obtained from the tables within BS 7671:
- Table 54.2 : Conductor not incorporated in a cable and not bunched with cables.
- Table 54.3 : Conductor incorporated in a cable or bunched with cables.
- Table 54.4 : Sheath or armour of a cable.
- Table 54.5 : Steel conduit or trunking.

Disconnection times (t) are obtained from the maximum operating time/current characteristics tables within BS 7671:
- Fig 3A2 (a,b) : BS 3036 semi-enclosed fuse.
- Fig 3A3 : (a,b) : BS 88-2.2.
- Fig 3A4 : BS EN 60898 / 61009-1 MCB/RCBO type B.
- Fig 3A5 : BS EN 60898 / 61009-1 MCB/RCBO type C.
- Fig 3A6 : BS EN 60898 / 61009-1 MCB/RCBO type D.
- BS 1361 Fuse.

How to use the Adiabatic Equation App:
1) Input your voltage value.
2) Input your Zs value.
3) Select protective device.
4) Select protective device rating.
5) Select conductor type.
6) Select conductor material.
7) Tap calculate.

## Adiabatic Equation Calculator Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/15/ec/30/15ec3050-5c91-050e-6814-22e6ddac1c62/img1.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/84/4d/c8/844dc83f-647e-0ddd-090d-152a15d1be5b/Launch.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/63/f4/15/63f415e5-4253-0a4b-094d-fecc3d5421c5/ProtectiveDeivce.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/66/cf/23/66cf23e9-fe31-fe53-d4cc-c274d5debe80/DeviceRating.png/1242x2688.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/78/dc/e5/78dce5a0-a4a4-9852-f41a-72b13dfe5fdb/ConductorType.png/1242x2688.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/97/06/b3/9706b396-fe85-ef16-0f42-593f0bf462c6/Material1.png/1242x2688.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/24/79/5d/24795daa-b8dc-3584-c382-fcbaf437683b/Material2.png/1242x2688.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/38/77/a5/3877a5bf-2b99-4e36-a9e8-006d290e5f76/Results.png/1242x2688.png)
- [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/32/4d/05/324d051d-0f33-3c67-e190-156be0e25f37/Home.png/1242x2688.png)

## Adiabatic Equation Calculator Rating Breakdown in United Kingdom
- 5 stars: 2 (67%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 1 (33%)



## Adiabatic Equation Calculator Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | United Kingdom | Productivity | #247 |


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- [United Kingdom](https://apptail.io/app/adiabatic-equation-calculator-YHYb/united-kingdom)
- [Argentina](https://apptail.io/app/adiabatic-equation-calculator-YHYb/argentina)
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---

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