Power Systems: Arc Flash Hazard Analysis, Short Circuit Study, and Breaker Coordination for Data Centers, Computer Rooms, & Mission Critical Technical Spaces
Arc Flash Hazard Analysis
An arc flash is an undesired electrical discharge that travels through the air from one conductor to another or from a conductor to a ground. Often there is sufficient electricity to cause substantial damage to equipment, fires, serious injury, and even death. The temperature may exceed 35,000 degrees Fahrenheit, rendering it capable of vaporizing metal and sending a molten metal blast in all directions with extreme force, causing tremendous damage in its wake. Generally, the higher the voltage is, the higher the risk.
PTS’ Arc Flash Hazard Analysis Objectives:
- Determine short circuit calculations and the clearing times of the phase overcurrent devices
- Calculate flash protection boundaries and incident energy at all locations where work could be performed
- Assess personal protective equipment PPE requirements for specific activities and locations
- Adherence to IEEE flash standards to minimize risk in the first place
- Evaluate equipment for arc flash and shock protection
The Need for Breaker Coordination
Electrical distribution systems often protect equipment (conductors, transformers, motors, etc) with fuses and/or circuit breakers. When an overcurrent situation exists, it causes the protective device to trip. Ideally, this protective action would only impact the part of the system where the failure occurred.
In a properly coordinated system, the protective devices are selected and adjusted to minimize the impact of equipment failures within a system. A coordination study analyzes the characteristic curves of the fuses and breakers and compares them against one another.
Objective of a Breaker Coordination/Short Circuit Study
The goal of a PTS Protective Device Coordination Study is to achieve an optimum balance between
equipment protection and selective isolation that is consistent with the operating requirements of the overall power system.
The short-circuit study checks the interrupting ratings of all protective equipment, conductors, and switches for adequacy. Inadequate equipment ratings can result in extensive damage to the
equipment during faults and system operation, and may introduce safety hazards to operating personnel, resulting in costly remedial measures.
Facility Electrical Testing is part of the PTS project process in the Operations and Maintenance phase:
To learn more about PTS Data Center Facility Services, contact PTS directly, or visit:
- Data Center Managed Maintenance (DCMM) Service
- Data Center Management
- Computer Room Management
- Server Room Management
- IT Infrastructure Management
- Facility Maintenance Software
- Maintenance Management
- Data Center Maintenance
- Computer Room Maintenance
- Server Room Maintenance
- Data Center Site Cleaning
- UPS Maintenance Management
- Generator Maintenance Management
- Computer Room Air Conditioning (CRAC) Maintenance Management
- Support Infrastructure Equipment Services
Additional DCMMS Links
Learn more about the PTS Data Center Maintenance Management (DCMM) Service, a complete & integrated managed solution for the operational maintenance of data center sites, from stand-alone data center facilities to tenant-space computer rooms, and their related support infrastructure.