Skip to the picture
Generator labLab
← Generator lab

Part 1 · The idea

  1. 1Split any three
  2. 2Three circuits

Part 2 · Faults in real systems

  1. 3The four faults
  2. 4Grounding
  3. 5Transformers & the line

Part 3 · Protecting the system

  1. 6The fault recorder
  2. 7What relays see
  3. 8Clear it in time

Teacher guide

A healthy line, fed at F

Test bench

Collapse the network

One base for each place

Its sequence network

Why?

Line

Generator

Δ–Yg transformer

Change base: work it out
Change base

Z_new = Z_old × (S_new / S_old) × (V_old / V_new)²

Old New

pu

The lab machine

Chapter 3's presets

Feed in
Source neutral
Test
Equipment
Test it from its
Collapse:
Network
Where are you?