Define automatic-transfer-switch application scope for backup power using source availability, load priorities, transfer sequence, controls, cabinet interfaces, and commissioning checks. This guide is for design and procurement discussions; confirm final installation, code, safety, testing, and qualified engineering requirements for the project.
Start with the process and boundary
Document the process steps, equipment, field signals, power sources, operating modes, environment, and the responsibilities of the controls integrator, cabinet builder, installer, and operator.
Cabinet and interface inputs
| Input | What to document |
|---|---|
| Equipment and signals | I/O list, ratings, sensors, actuators, terminals, network ports, and required isolation. |
| Environment and installation | Indoor or outdoor location, temperature, moisture, dust, access, mounting, cable entry, and service clearance. |
| Control sequence | Modes, permissives, alarms, interlocks, transfer or inspection decisions, and operator actions. |
| Evidence and handover | Drawings, labels, test records, parameter files, software backups, training, and maintenance instructions. |
Selection and review checklist
- Separate confirmed project data from assumptions and vendor options.
- Check interfaces between the field equipment, controller, HMI, network, and cabinet.
- Record open decisions, acceptance tests, and the person responsible for each item.
Do not copy a competitor’s performance, safety, cybersecurity, certification, or availability claim without project-specific evidence.
NL 
EN 
EN_ZA 
AR 
EN_GB 
DE 
ES 
FR 
IT 
JA 
ZH 
TR 
RU 
EN_CA 
EN_AU 
PT 
FA