Functionality Checks
Confirm System Readiness Before Energisation
We provide functionality checks for high and low voltage electrical systems to verify that all control, protection and monitoring devices operate as intended. These checks are an essential step in commissioning and maintenance.
What Are Functionality Checks?
Functionality checks are live or simulated system tests carried out to ensure every component responds correctly. They confirm that relays, breakers, interlocks, alarms and indicators work as designed.
We test:
- Control logic sequences
- Trip and close circuits
- Alarms and status indications
- Interlocking and fail-safe logic
- Protection coordination and settings
- Communication between panels or systems
Checks are tailored to your installation type and equipment layout, ensuring systems are fully verified before use.
When Functionality Checks Are Needed
These checks are part of final commissioning but are also useful during upgrades, shutdowns and fault investigations.
Suitable for:
- Substations and switchgear panels
- Industrial automation systems
- Generator and UPS systems
- Critical backup infrastructure
- Renewable energy systems
A full record of each function check is included in our handover documentation.
Frequently Asked Questions
What’s the purpose of a functionality check?
It ensures all parts of an electrical system operate as expected, helping to catch configuration issues or wiring errors before energisation.
Is this done with live power?
Some checks are done with simulated signals or isolated power. Others, like trip circuits or alarms, may be tested live depending on the system.
How is this different from testing relays?
Relay testing confirms timing and response. Functionality checks confirm the relay’s action causes the correct output, like tripping a breaker or showing an alarm.
Do I get a report?
Yes. Our team includes SAPs authorised under various UK DNOs and trained to work within their specific safety procedures and systems.