Electrical Testing and Commissioning Checklist for Industrial Projects

Before applying power, complete these checks:

1. Visual inspection: Verify correct installation, no damaged equipment, proper labeling.

2. Tightness check: Torque all connections to manufacturer's specification.

3. Cleanliness: Remove construction debris, tools, temporary wiring.

4. Documentation: Verify all drawings, manuals, test reports are on-site.

5. Safety: Verify all safety signs, barriers, fire protection in place.

Purpose: Detect insulation degradation, moisture, contamination.

Method: Apply 500V-5000V DC (depending on voltage rating), measure resistance.

Acceptable values: >1 MΩ for low voltage, >10 MΩ for high voltage (IEC 60364).

Record: Ambient temperature, humidity, equipment name, test results.

Function test: Verify relay operates at set point (current, time).

Trip test: Verify circuit breaker trips when relay operates.

Communication test: Verify relay communicates with SCADA/system.

Settings verification: Compare actual settings with approved settings sheet.

Step 1: Apply voltage to main incoming (no load). Verify voltage levels, phase sequence.

Step 2: Energize distribution panels (no load). Verify voltage at all levels.

Step 3: Load testing. Start with 25%, 50%, 75%, 100% load. Monitor temperature, voltage drop.

Step 4: 24-hour continuous run. Monitor all parameters, record data.

Test reports: Insulation resistance, protection relay, energization test.

As-built drawings: Reflect actual installation (not design drawings).

O&M manuals: Operation procedures, maintenance schedules, spare parts list.

Training: Operator training, demonstration of emergency procedures.

Warranty: Typically 12 months from handover.

1. Rushing energization (causes equipment damage)

2. Incomplete testing (faults found after handover)

3. Poor documentation (owner cannot operate/maintain)

4. No load testing (problems appear only under load)

5. Skipping training (operators don't know how to use the system)