Category: Motor Control
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Unit 1-2: Single-Phase vs. Three-Phase Power: Voltage & Current Comparison
Single-Phase vs. Three-Phase Power: Voltage & Current Comparison 1. Single-Phase Power (1Φ) 2. Three-Phase Power (3Φ) Key Differences: Single-Phase vs. Three-Phase Parameter Single-Phase (1Φ) Three-Phase (3Φ) Voltage (V) 120V, 230V 208V, 400V, 480V Current (A) Higher for same power Lower for same power Power Delivery Pulsating Continuous & balanced Efficiency Lower for heavy loads Higher…
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Unit 1-1: Safety
OSHA Electrical Safety Regulations for Motors and Circuit Breakers The Occupational Safety and Health Administration (OSHA) sets strict electrical safety standards to prevent workplace injuries and fatalities. Below are key regulations relevant to motor and circuit breaker installations: 1. General Electrical Safety (29 CFR 1910.303) 2. Motor & Circuit Protection (29 CFR 1910.304) A) Overcurrent Protection (1910.304(f)) B)…