Short Circuit Calculations: IEC 60909

Name: Short Circuit Calculations: IEC 60909
Rating: 4.4 (5 reviews)

Learn short circuit current calculations manually Excel based on IEC 60909 standards and validate results with ETAP

Created byUmut Döner

Last updated 2/2026

English

What you'll learn

Discount: POWERJUNE
IEC 60909 standard by applying equations to power system scenarios.
Gain the ability to calculate and analyze fault currents as per IEC 60909
Perform simulations using the ETAP Short Circuit Tool to validate your manual calculations
Develop the skills to understand any academic or technical paper on fault analysis
Build your own calculation templates in Excel to see how impedance changes affect the total fault current.

Course content

4 sections • 26 lectures • 4h 26m total length

Transformer and Line Single Line1:15
Transformer and Line Impedance and Fault Current12:03
Transformer and Line Impedance and Fault Current11:22
Transformer and Line ETAP Comparison12:56
Compare results from top software for a power grid network with buses and transformers, examining short-circuit currents and impedance, including x by r and method c.
Transformer and Line Method C Peak Currents10:56
Transformer and Line Admittance Matrix12:29
Transformer and Line Impedance Matrix8:12

MV Motor Contribution Single Line1:37
MV Motor Contribution Part-114:03
MV Motor Contribution Part-24:37
MV Motor Contribution Part-316:40
Compute motor contribution to short-circuit currents by deriving motor impedance from rated data and IEC-based complex values, then analyze f2 faults with a series–parallel equivalent circuit and validate with etabs.
MV Motor Contribution Part-412:56
MV Motor Contribution Part-515:50
Compute peak and breaking short circuit currents using IEC standards, with kappa and IK double prime, r by x values, motor and transformer contributions, and steady state currents.

Power Plant Auxiliary Basic Single Line1:37
Power Plant Auxiliary Fault Current Part-120:18
Analyze power plant auxiliary fault current by deriving network and transformer impedances, applying complex impedance and sub transient generator reactance, then parallel connections to compute short circuit current.
Power Plant Auxiliary Fault Current Part-213:26
Compute the S2F2 fault currents between the generator, step-up transformer, and auxiliary transformer using IEC standards. Apply z_q based impedances to determine ikg'' and ICT for the short-circuit current.
Power Plant Auxiliary Fault Current Part-36:32
Power Plant Auxiliary Fault Current Part-47:03
Form the F3 fault equivalent at the 6.3 kV bus using generator, unit and auxiliary transformer impedances with KTS corrections to obtain the no-motor short circuit current, 19.55 kA.
Power Plant Auxiliary Fault Current with Medium Voltage Motors Group Part-515:31
Power Plant Auxiliary Fault Current with Motor Groups Contribution Part-69:43
Power Plant Auxiliary Low Voltage Motors Part-74:35
Power Plant Auxiliary Peak Current and Breaking Current Part-87:15
Power Plant Auxiliary ETAP Comparison Part-910:39
Compare short-circuit results using ETAP for a 220 kV network, set transformer impedance and generator reactance, and run simulations to evaluate unit and auxiliary transformer contributions.

Requirements

Basic understanding of Electrical Engineering concepts (Voltage, Current, Impedance).
Familiarity with Microsoft Excel.
(Optional) ETAP software access (The instructor will show the software results, but you can follow the manual calculations without it).

Description

Why is Short Circuit Analysis Essential? Short circuit analysis is the backbone of power system protection. It is critical for the safety of life and the protection of expensive electrical property. Without accurate fault calculations, it is impossible to size equipment correctly or set protection relays.

While software is convenient for large networks, understanding the manual calculation process is vital for verifying results, identifying deviations, and understanding how component impedances change under different conditions

What This Course Offers This course focuses on exercises with basic single lines rather than dense history or dry theory. We dive straight into the application of the IEC 60909 Standard, the primary document for scientific assessment in the industry.

Through this course, you will:

Master Manual Calculations: We use Excel as a teaching tool to break down complex equations step-by-step.
Validate with ETAP: See how your hand-calculated results compare to industry-leading simulation software.
Analyze Real Scenarios: Work through a variety of exercises that cover basic to intermediate concepts in fault analysis.

While simulation tools are convenient, manual calculation is a core skill for any engineer who wants to master power system analysis. This course provides the foundational steps needed to perform advanced technical studies.

NOTE: The IEC standard has to be purchased to perform engineering studies in detail.

Who this course is for:

Power System Engineers or Electrical Engineers who want to understand the "why" behind their simulation results.
Designers and Technicians involved in protection and equipment sizing.
Anyone curious about the mathematical foundations of the IEC 60909 standard.

Short Circuit Calculations: IEC 60909

What you'll learn

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Course content

Transformer and Line7 lectures • 1hr 9min

Medium Voltage Induction Motor Contribution6 lectures • 1hr 6min

Power Plant Auxiliary10 lectures • 1hr 37min

Single Generator3 lectures • 35min

Requirements

Description

Who this course is for: