Fault Current Calculator (PFC)
PFC Fault Current Calculator
Free · Designed for iPad. Not verified for macOS.
An electrical prospective fault current calculator application for single and three phase electrical systems. Calculate for Voltage, Loop Impedance or PFC fault current.
Fault Current Calculator for iPhone and iPad is a fast, free tool for electricians, contractors, and engineers. Calculate Prospective Fault Current (PFC), Prospective Short-Circuit Current (PSCC), and Prospective Earth Fault Current (PEFC).
Enter any two known values - voltage, loop impedance (Zs/Ze), or fault current - and the app instantly calculates the third.
KEY FEATURES:
PSCC and PEFC calculations:
Calculate prospective short-circuit current for L-N or L-L faults and prospective earth fault current for L-E faults.
Single-phase and three-phase support: Perform fault-current calculations for both system types.
Automatic calculations:
Enter any two known values to auto calculate the third.
Loop-impedance calculator:
Calculate Zs or Ze from voltage and prospective fault current.
Formula display:
See the formula used for each calculation so you can understand and verify the result.
Works offline:
Use the app in roof spaces, basements, plant rooms, and other locations without a signal.
Dark mode and light mode:
Maintain a clear display in different site conditions.
16 languages:
Fully translated for electricians worldwide (af, ar, de, es, en, fr, hi, id, it, ja, ko, nl, pl, pt, ru, zh).
Fast and free:
A clean interface designed to deliver results without unnecessary steps.
DEFINITIONS:
AIC (Ampere Interrupting Capacity), often written as kAIC for kilo-Amperes, is a specific rating for protective devices that open a circuit, such as circuit breakers and fuses.
SCCR (Short-Circuit Current Rating) is the maximum fault current that a complete piece of equipment or electrical assembly (like an industrial control panel, switchboard, or HVAC unit) can safely withstand without causing a hazard.
Electrical calculations should be independently verified before safety-critical work. Ensure the calculated prospective fault current does not exceed the protective device's rated breaking capacity.
For additional tools, upgrade to Electrical Tools & Reference, which includes calculators for kVA, Max Zs, cable sizing, and more.
Pro Certs Software - trusted by electricians since 2011.
11/08/2026 v1.4.8
- New user interface (UI)
- Added dark mode
- Added 16 languages (af, ar, de, es, en, fr, hi, id, it, ja, ko, nl, pl, pt, ru, zh)
- Performance optimisations
- Added help guides
The developer, Pro Certs Software Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Pro Certs Software Ltd
- Size
- 10.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2011-2026 Pro Certs Software Ltd