- Types and construction - Confirm correct construction and ratings to meet specifications, standards, and project requirements. Determine and perform testing and inspection requirements.
- Basics of Switchboards [PDF] The role of a switchboard is to divide the main current provided to the switchboard into smaller currents for further distribution and to provide switching, current protection, and metering for these various currents. Although this applies to all switchboards, the voltages and currents involved vary with the size of the application.
- Basics of Motor Control Centers [PDF] In many commercial and industrial applications, quite a few electric motors are required, and it is often desirable to control some or all of the motors from a central location.The apparatus designed for this function is the motor control center (MCC).
- Comparison of ANSI/IEEE Requirements for Low-voltage Switchgear [PDF] This paper discusses and compares some of the major conformance testing and constructional differences between metal- enclosed switchgear designed in accordance with ANSI/IEEE standards with similar switchgear and controlgear equipment designed in accordance with IEC standards.
- Inspection, Test and Measurement Procedures for LV and MV (up to 36kV) Switchgears Important checks and maintenance for switchgear.
- Field Inspection and Testing of Medium-Voltage Motor Control Centres (MCCs) Important checks and maintenance for MCCs.
- NETA Tech Quiz: Switchgear & Circuit Breakers [PDF] These questions will help sharpen your knowledge on switchgear and maintenance.
- Metal-Clad Switchgear or Metal-Enclosed Switchgear: Which Is It? [PDF] Metal-clad switchgear is one of three common types of metal-enclosed switchgear, as defined in ANSI standards.
- Rating of Ground Bus in Metal-Enclosed Switchgear [PDF] All metal-enclosed switchgear built to ANSI standards is required to include a ground bus to connect together all items in the switchgear that are required to be grounded. The ground bus is rated for short-circuit and short-time duty.
- Condensation in Switchgear and Anticondensation Heaters [PDF] When condensation occurs in switchgear, there are very few surfaces where the result is not detrimental.
- Why is Continuous On-line Monitoring of Partial Discharge in the Switchgear Necessary? Periodic on-line PD test could miss significant PD activities since PD activities vary by time. On-line continuous monitoring eliminates the inherent flaw of interval-based testing.
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