Planning Guide

ATS and Parallel Power System Planning

A practical guide to automatic transfer, grid-parallel and multi-generator switchgear requirements, sequences and test evidence.

Key Takeaways

  • Start from the approved single-line and operating modes
  • Separate ATS, grid-parallel and generator-parallel functions
  • Test failure and recovery scenarios, not only normal operation

Technical guide introduction

Automatic transfer, grid-parallel and generator-parallel systems solve different electrical tasks. Each requires an agreed source arrangement, protection basis, control sequence, operating authority and functional test plan.

Technical planning workflow

Six-Step Project Guide

6 reviewed steps
1

Step 1

Start from the approved single-line and operating modes

Automatic transfer, grid-parallel and generator-parallel systems solve different electrical tasks. Each requires an agreed source arrangement, protection basis, control sequence, operating authority and functional test plan.
Input to confirm Guide context
Start from the approved single-line and operating modes Planning Guide
Separate ATS, grid-parallel and generator-parallel functions Project Planning
Test failure and recovery scenarios, not only normal operation 13 minutes
2

Step 2

Separate ATS, grid-parallel and generator-parallel functions

Utility-parallel operation requires the applicable utility approval. Final switchgear ratings and sequence are project-specific.
Illustrative planning profile Sequence only ? not generator performance data
Start from the approved single-line and operating modes
Separate ATS, grid-parallel and generator-parallel functions
Test failure and recovery scenarios, not only normal operation
Utility, generator, bus and essential-load single-line diagram
Voltage, current, fault level, neutral, earthing and protection requirements
Permitted interruption, start and transfer time, load steps, redundancy and reserve
3

Step 3

Test failure and recovery scenarios, not only normal operation

A practical guide to automatic transfer, grid-parallel and multi-generator switchgear requirements, sequences and test evidence.

Start from the approved single-line and operating modes

Utility-parallel operation requires the applicable utility approval. Final switchgear ratings and sequence are project-specific.

Separate ATS, grid-parallel and generator-parallel functions

A practical guide to automatic transfer, grid-parallel and multi-generator switchgear requirements, sequences and test evidence.

Test failure and recovery scenarios, not only normal operation

A brochure-backed guide to alternator electrical inputs, controller operating modes, communications and project integration.

4

Step 4

Utility, generator, bus and essential-load single-line diagram

A brochure-backed guide to alternator electrical inputs, controller operating modes, communications and project integration.
Review resource Format Knowledge area Reading time
Alternator and Generator Controller Selection Product Guide Products 12 min
Warranty Claim Preparation: Evidence and Case Workflow Service Guide Service Support 10 min
Commissioning Readiness Checklist Service Guide Service Support 10 min
5

Step 5

Voltage, current, fault level, neutral, earthing and protection requirements

How to preserve evidence, identify the applicable contract basis and prepare a traceable generator or system warranty case.
1 Alternator and Generator Controller Selection Product Guide 2 Warranty Claim Preparation: Evidence and Case Workflow Service Guide 3 Commissioning Readiness Checklist Service Guide
6

Step 6

Permitted interruption, start and transfer time, load steps, redundancy and reserve

What the project team should complete before generator start-up, functional testing, load testing and handover.
Planning Guide Project Planning

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About the Author CAMDA Technical Team
Technical Review CAMDA Technical Team

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