Reliability considerations in simple paralleling applications

04/10/2013


Service and support

One of the first questions that should be considered when choosing a supplier of a paralleling system is how the system will be supported in the future. Properly supporting all the system’s equipment requires a diverse skill set. Working with a supplier that has a proven track record of designing, installing, and maintaining complete paralleling systems is the best way to ensure reliable operation over the life of the system. Questions to ask include: 

  • Have the service technicians been trained and certified by the manufacturer on all components of the paralleling system? Claims that an engine dealer technician can service a paralleling system should be viewed with skepticism.
  • Have the service technicians been certified with the make and model of engines being used in the application? Suppliers that use engines from different manufacturers may require different service organizations to support systems within the same geographical region.
  • Does the service organization offer comprehensive maintenance programs for the entire system?
  • Does the service organization have a demonstrated history of supporting paralleling systems in many different types of applications?
  • What is the availability of replacement parts? Power transfer devices will often need to be replaced after faults. Replacing a proprietary contactor rather than a paralleling circuit breaker can result in a system being down for a significant period of time. Replacing a proprietary component with a standard one may not be acceptable if the new device isn’t listed for use with the existing overcurrent protection.
  • If a control needs to be replaced, is custom programming required for the replacement control and who is authorized to do the programming? What is the time frame for replacing the control? 


Anonymous , 05/08/13 10:25 AM:

Excellent Article.
VISH , CA, United States, 05/08/13 12:53 PM:

Some of the increased cost of the parallel system can be off-set by Peak Load shaving technique. Illustration of Pros and cons of the system will greatly help the engineers to make the right decision.
Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
2014 Product of the Year finalists: Vote now; Boiler systems; Indirect cooling; Integrating lighting, HVAC
High-performance buildings; Building envelope and integration; Electrical, HVAC system integration; Smoke control systems; Using BAS for M&V
Pressure piping systems: Designing with ASME; Lab ventilation; Lighting controls; Reduce energy use with VFDs
Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Consulting-Specifying Engineer case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.

Protecting standby generators for mission critical facilities; Selecting energy-efficient transformers; Integrating power monitoring systems; Mitigating harmonics in electrical systems
Commissioning electrical systems in mission critical facilities; Anticipating the Smart Grid; Mitigating arc flash hazards in medium-voltage switchgear; Comparing generator sizing software
Integrating BAS, electrical systems; Electrical system flexibility; Hospital electrical distribution; Electrical system grounding
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.