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Short Circuit Analysis

It is essential for personnel safety, equipment protection, and system reliability that power system equipment be adequately rated for the maximum short circuit currents. The short circuit study calculates the maximum available fault currents throughout the system and establishes the adequacy of the equipment short circuit ratings to assure a safe, reliable system.
For new facilities, a short circuit study should be performed before the electrical equipment is selected. For existing facilities, a short circuit study should be performed if significant changes have occurred either within the facility or in the utility system.

Protective Device Coordination Study

In a properly coordinated system, only the protective device nearest the fault operates to isolate the faulted circuit without disrupting power to other portions of the system. This study provides recommended fuse sizes and settings for circuit breakers and relays to achieve optimum system protection and selective isolation of faults to minimize system downtime. The study engineer must often arbitrate between competing solutions to achieve maximum protection while ensuring minimum service interruption.

Load Flow Study

Poor voltage regulation or low power factor loads may adversely affect equipment performance, system efficiency, and the cost of power. Alternate operating configurations may result in unequal load distribution or overloading lines within a network system. The load flow study calculates load distribution and voltage profiles to examine the performance of the system and determine the effectiveness of voltage regulation or power factor correction equipment.

Grounding Study

Proper system neutral grounding methods must be employed to ensure personnel safety and service reliability. The grounding study determines the optimum method for grounding to provide a safe reliable system and meet the overall operating objectives of the facility.

Reliability

Facilities which must maintain service to essential loads require a system designed for minimum downtime. The reliability study analyzes the capability of the system to service essential loads and uses statistical data to assist in the planning, design, or upgrade.

Motor Starting

Load Flow Study

The increased inrush current during starting of large synchronous or induction motors may cause an unacceptable system voltage drop which can prevent the motor from accelerating or have an adverse effect on other system loads. The motor starting study determines system requirements or appropriate starting methods to assure the motor can accelerate to speed while normal service is maintained for other loads.

Reliability Centered Maintenance

Reliability Centered Maintenance (RCM) studies focus the role of preventive maintenance activities on the retention of the equipment's inherent design reliability. The backbone of RCM methodology includes first, the basic concept of reliability theory, and second, the key reliability tool known as Failure Mode and Effect Analysis (FMEA). It is through this process that scheduled maintenance burden and support costs are reduced while sustaining or improving the necessary uptime and availability.