Commissioning and Startup Training Curriculum

Mod 6 - Electrical

Module from the Commissioning and Startup Training Curriculum curriculum.

Module 6 — Electrical and Motor Commissioning · Learning Objectives · 1. Execute safe energization of HV and LV equipment in correct sequence. · 2. Perform insulation resistance (megger) testing on motors and cables. · 3. Conduct solo run of motors and document bearing temperature, vibration, and current. · 4. Verify protective relay settings and coordination. · 5. Apply NFPA 70E LOTO practices during commissioning work. · Energization Sequence

Step	Action
1	Substation transformer energized from utility
2	Switchgear bus energized; protective relays armed
3	MCC lineup energized
4	Individual motor feeders energized
5	VFD drives commissioned with motor decoupled
6	Motor solo run decoupled
7	Motor coupled, run with equipment no-load/low-load
Insulation Resistance (Megger) Criteria
Voltage Class	Test Voltage
<600 V	500 V DC
600 V–4.16 kV	1000 V DC
>4.16 kV	5000 V DC
Cables	Per class
PI (Polarization Index)	10-min/1-min
Motor Solo Run — Data Logged
Parameter	Acceptance
Rotation	Per arrow; verify before coupling
No-load amps	~30–40% of FLA
Bearing temperature	<185 °F (85 °C) steady state
Bearing vibration	<0.157 in/s (4 mm/s) per ISO 10816
Motor winding temp	<221 °F (105 °C) at full load
Run duration	2 hours solo; then 4 hours coupled
Protective Relay — Typical Functions
ANSI #	Function
50/51	Overcurrent
27/59	Under/over voltage
49	Thermal overload
46	Current unbalance / negative seq
87	Differential
81	Frequency
51G / 50G	Ground fault
NFPA 70E Commissioning Practices
Activity	Requirement
LOTO	De-energized work
Arc flash PPE	Per incident energy calc, labels posted
Qualified person	Training + recent exposure documented
Permit	Energized work permit for >50 V live work
Absence-of-voltage test	3-point: test meter, prove on live, test circuit, prove again
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Source: Commissioning_and_Startup_Training_Curriculum_v1.xlsx · Sheet: Mod 6 - Electrical

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