Service 11 / 15
PHASE
SEQUENCE
Complete phase sequence testing services — verifying correct phase rotation for motors, generators, transformers, and three-phase distribution systems.
Overview
Correct Rotation
Every Time — Verified.
Phase Sequence Testing confirms the order in which the three phases (L1, L2, L3) reach their peak voltage — ensuring motors rotate in the correct direction and three-phase equipment operates safely.
Our engineers use calibrated phase sequence indicators to verify rotation at main intake panels, distribution boards, motor control centres, and equipment terminals.
Incorrect phase sequence can cause motors to run backwards, damage rotating equipment, and create unsafe conditions — our testing eliminates these risks before energization.
Scope of Work
What We Deliver
Rotation Verification
Confirmation of correct L1-L2-L3 phase rotation at main intake and distribution points.
Motor Direction Check
Verification of motor rotation direction before coupling to driven equipment.
Generator & Transformer
Phase sequence checks on generators, transformers, and interconnecting feeders.
MCC & Panel Testing
Phase rotation verification at motor control centres and distribution panels.
Documentation
Complete test records with phase rotation results and compliance notes.
Pre-Energization Checks
Phase sequence confirmed before first energization to prevent equipment damage.
Why This Service
Protect
Your Equipment.
🔄
Prevents Reverse Rotation
Stops motors running backwards and damaging driven equipment.
⚡
Safe Energization
Confirms correct phase order before first power-up of new systems.
✅
Regulation Compliant
Testing performed to BS 7671 and IEC 60034 requirements.
Our Process
How We Deliver
Identify
Locate test points and phase terminals.
Measure
Check phase rotation with indicator.
Verify
Confirm correct L1-L2-L3 order.
Record
Document results and issue report.
Get a Quote
Need Phase Sequence Testing?
Share your testing requirements and our team will respond with a tailored plan within 24 hours.