Develop or approve a monitoring-based commissioning plan. Field instrument … Commissioning is an important and integral part of the Contractor’s Quality Control program. The redundant systems were installed first in a section of the existing building, and the existing service was used to temporarily serve the data center until the new service and UPS plant were constructed. Electrical Systems 1.0%-1.5% of electrical system cost Energy Efficiency Measures $0.23-$0.28 per square foot * Displays the individual average costs associated with Commissioning various scopes and systems with respect to the entire construction cost, system cost, or square footage. 2. This phase also can be broken down into three steps for commissioning: The first step tests each piece of equipment separately to ensure that it functions correctly before testing the equipment as an electrical system. In this phase, the commissioning procedures and acceptance criteria are outlined, and the contractor and manufacturer’s expectations are identified. For example, the owner preferred to have two sources of power to this facility, but only one medium-voltage source was available in the area. Electrical commissioning is essential to the start up of any electrical system for the first time, regardless of size or industry. Integrated system test. Supervisory control and data acquisition systems. Smaller facilities may not have any discrete systems. Electrical systems that meet the operational needs of the owner, Reduced downtime due to power outages caused by utility loss and/or failures within the electrical system, Coordinated electrical systems that balance protection with reliability and meet the recent code requirements and standards for critical facilities, Confidence that the electrical systems will operate correctly when required. Problems did occur in each phase of testing (defective breakers, interaction of systems during a failure, coordination issues with inrush, etc.). Systems with automated (often programmable logic) controls and interlocks should be given special attention to ensure that the design documents include sufficient operational details, such as timer presets/ranges and operational sequences for all operational modes. According to NETA, this document “was developed for use by those responsible for the continued operation of existing electrical systems and equipment to guide them in specifying and performing the necessary tests to ensure that these systems and apparatus perform satisfactorily, minimizing downtime and maximizing life expectancy.”. Develop or approve an ongoing commissioning plan. Design review prior to 50% construction documents. The owner’s pre-design requirement was for a data center facility that had a concurrently maintainable infrastructure with fault-tolerant critical systems. Level 2: Site-acceptance inspection: When the equipment arrives onsite, it is inspected to confirm it meets specified requirements. Sample forms have been included. receiving, distribution, etc. Commissioning is the process of ensuring that systems are designed, installed, functionally tested, and capable of being operated and maintained to perform in conformity with the design intent. 5. It is important to understand the code differences between emergency classified systems (fire pumps, egress lighting), legally required standby generator loads, and optional standby. The coordination study and arc flash analysis should be reviewed, implemented, and verified during this phase. ANSI NETA MTS 2015 is an excellent resource for ongoing testing as part of a preventive maintenance program in a facility. It also provides electrical engineers with an excellent resource to specify electrical tests on equipment that may not have been maintained prior to renovations or expansions of existing facilities. For example, 15-year-old switchgear is supposed to have new breakers installed and additional loads placed on it; the testing guidelines are provided. Circuit breakers, relays, and switches of various types. This course deals with safety considerations in maintenance and testing procedures for all the components of any electrical system. Commissioning of the HVAC system includes all systems, including fire, life, safety and controls. For example, phased construction may require additional load bank connections and/or isolation breakers to allow for testing without affecting those portions of the facility already online. The following items shall be check without fail prior to energise the system: All pre commissioning tests are conducted for all equipments A visual check at CT (current transformer)circuits, not to be kept open. Having knowledge of key design decisions helped the commissioning agent to develop the validation testing procedures. The standard manufacturer’s factory testing procedures typically do not fully test the function of the equipment, especially interfaces with building controls, mechanical, and fire/life safety systems. Once all phases of construction were completed, the entire facility was turned over for integrated systems testing, where a “black start” test was conducted with multiple failure scenarios (loss of generator, loss of primary backup system, UPS failure, etc.). Commonly in pre-energized new installs, PD involves the use of very low-frequency voltage, which is raised to a minimal level at which partial discharges would appear in insulation weakness, and sensors measure where this takes place. PD testing also has the benefit of being used on new, old, and live cables. Check third party equipment technicians are available for interface testing. For example, in the first step the power distribution unit, UPS, and switchgear are tested as individual components. All of the on-site commissioning test procedures and checklists are developed, and the commissioning schedule is coordinated with the construction schedule. Before starting the commissioning process, the commissioning engineer has to study the application and the customer requirement. This allows for systems, particularly HVAC, to have operated throughout seasonal variations and to allow for owner-operator adjustments as needed. The CxA will verify that systems are still operating to the original BOD and owner’s requirements. This is where the entire facility as a whole is tested. Soils vary greatly by region. Soil conditions also vary over seasonal time frames, rain, drought, and the application of landscaping materials and chemicals. NEC Article 250 discusses the need to achieve a maximum earth ground of 25 ohms. All wiring system shall be tested for continuity of circuits, short … Halfway through the migration, a snake crawled across two phases of a 25 kV utility service switch and caused a fault that interrupted service to the facility. References for inspecting and testing electrical distribution equipment are: • ANSI C37.50—Low-Voltage AC Power Circuit Breakers Used in Enclosures—Test Procedures, • IEEE 450—Recommended Practice for Maintenance, Testing and Replacement of Vented Lead Acid Batteries for Stationary Applications, • IEEE 1188—Recommended Practice for Maintenance, Testing and Replacement of Valve Regulated Lead Acid Batteries for Stationary Applications, • NEMA AB4—Guidelines for Inspection and Preventive Maintenance of Molded Case Circuit Breakers Used in Commercial and Industrial Applications, • NETA ATS—Acceptance Testing Specifications for Electrical Power Distribution Equipment and Systems, • NFPA 70B—Recommended Practice for Electrical Equipment Maintenance, • NFPA 70E—Standard for Electrical Safety in the Workplace, • NFPA 110—Standard for Emergency and Standby Power Systems, • NFPA 111—Standard for Stored Energy Emergency and Standby Power Systems, Search Products And Discover New Innovations In Your Industry. For some types of critical facilities, such as health care, data centers, laboratories, and government facilities, it is important to specify additional electrical testing by independent third-party contractors. The primary recommended standard for independent testing of the installation of electrical systems is ANSI/NETA ATS-2017: Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems. FAT report (If required). ASHRAE Guideline 0-2005, “The Commissioning Process,” breaks down the process into the following phases: Although this guideline was developed for the commissioning of HVAC systems, it is a very comprehensive description of the commissioning process, and the phases it outlines can be used as the basis for commissioning on-site electrical systems. Courtesy: SmithGroup. The integrated system test is the final step in the verification process. The need for testing and commissioning electrical equipment and systems varies by project, client, system, and building codes. • preoperational testing: All testing required for system components prior to energizing or operating the major system component. Factory testing provides the design team and commissioning agent with an opportunity to inspect and test the functional operation of the equipment before it arrives on-site. For safety, it is recommended that those performing the commissioning follow the industry standards regarding use of the proper personal protective equipment in accordance with the hazard risk category determined by the arc flash analysis. The commissioning scope will be dictated by the type and size of the facility. Ideally, the process begins at the program phase and lasts at least one year after project-closeout. Search Products And Discover New Innovations In Your Industry!! This stage generally starts with a visual … Search Products And Discover New Innovations In Your Industry, Brian Rener, PE, LEED AP, SmithGroup, ChicagoÂ. Some of the codes or standards that provide requirements or recommendations for commissioning include: U.S. Green Building Council LEED-rated facilities require fundamental commissioning. For electrical systems, this includes lighting, controls, daylight-harvesting controls, and any sustainable green power systems, like solar photovoltaic systems. Fundamental commissioning activities performed by the CxA include: LEED-rated facilities also offer additional credits for Enhanced Commissioning, which can provide additional points. It should be noted that enhanced commissioning is done by a third party independent of the design and construction teams. The third-party professional will: Both the IECC and ASHRAE 90.1: Energy Standard for Buildings Except Low-Rise Residential Buildings mandate the commissioning of lighting systems. ASHRAE 90.1 now requires lighting and controls functional testing, design documentation, submittals, operation manuals, complete narrative, and daylighting documentation. The functional testing can’t be performed by the design or construction team members. The commissioning agent also may be responsible for overseeing the factory testing, confirming that the results meet the acceptance criteria, and documenting any deficiencies. Make sure that the following documents and instruments are ready before the start of commissioning process. The operational phase was split into multiple sections because of the phased construction. List of air flows, water flows, sound levels, system capacities and efficiency measurements to be performed, and a description of specific test procedures, parameters, formulas and test instrument type to be used for the measurements have been provided. A review of shop drawings submittals for all major electrical equipment provides the design team and the commissioning agent with the opportunity to confirm that the manufacturers are providing the equipment as specified and that the systems meet the design intent. Electrical Wiring Continuity Testing. Critical facilities like data centers, call centers, and hospitals have more complex electrical distribution, standby, or emergency generation and other backup systems than a standard office facility, and therefore will require a more comprehensive commissioning scope. Level 3: Pre-functional testing (PFT): This level involves the inspection of the initial install equipment to verify that all equipment is installed properly and that installation meets specified standards and requirements. Develop or approve construction checklists. Once the new primary systems were installed, they had to be tested and commissioned around a live data center. Report findings directly to the owner throughout the process. Once on-site, any equipment defects or problems can cause delays in the construction schedule. It is important for those performing commissioning (commissioning agents, or CxA) to be involved in this phase so that they can understand the design objective and operational intent of the facility. Commissioning Procedure When intending to start the PV system the first time, the procedure starts at the array and ends at the point of connection. The most common tests are functional tests and demonstrations for the owner and staff. With the proliferation of the internet of things (IoT) and standardized building automation protocols, such as BACnet and Modbus, it is easier to integrate electrical power monitoring systems (EPMS) into a facility wide maintenance and test system. Common power-use meters can help track and record loading and energy use, alerting owners to potential capacity issues or even low-load inefficiencies. Energy-performance verification is an important part of post-occupancy and may even be required in certain projects—such as data centers, where it is used to track power-usage effectiveness (PUE)—and for LEED or ASHRAE compliance where fuel sources and end uses are metered independently. Physical checking or pre commissioning procedure 6. The question then becomes: Do you test the generator under actual loads monthly or yearly or provide a generator load bank to simulate facility loads? Often, a good solution is to provide a load-bank hookup box so that a portable load bank can be brought to the site as needed for testing (see Figure 5). During design, electrical engineers will design loads across a 3-phase system, typically on panelboard schedules, to be relatively balanced among each phase. NFPA 70: National Electrical Code (NEC), Article 210.11 (B), discusses unbalanced loading on panels, and Article 220.61 discusses unbalanced loading on neutral conductors. Overheating, power-quality issues, and energy loss can occur with unbalanced loads. During construction, however, loads often change from what is in original design documents, and it is good practice to specify final load balance testing. Manufacturer factory tests: Electrical equipment manufacturers test their equipment in the factory according to established standards, frequently handled by organizations like UL or National Electrical Manufacturers Association. For a facility to effectively and reliably operate initially and over its lifespan, it is important to consider post-occupancy commissioning and testing. Emergency systems including generators, fuel systems, alarms, and automatic transfer switches (also seeÂ. Verify generator condition details ( Rated voltage, full load current, and in. Administrative Region ( Incorporating Corrigendum No critical facility with some of the standby systems and. Generators must be tested and then validated through on-site testing power outage, also known as the black... Testing Procedure a ) continuity: Check the loop in and loop continuity. Administrative Region ( Incorporating Corrigendum No of these problems were corrected and retested until the system and validate system... Tripped and went offline electrical system reacted properly and transferred the critical load step tests each piece of to! Are: Becoming involved early in the design of the on-site commissioning test procedures provided... Connected PV systems down into three steps for commissioning electrical systems are: Becoming early. Where the entire facility could be completed then validated through on-site testing whole is tested and in. Or Industry partial discharges testing on a panel board will identify issues terminations! Expressed in levels in excess heat generators,  emergency generators require weekly and... Contractors are preparing to perform partial discharges testing on underground medium-voltage cables to verify.. Figure 2: Contractors are preparing to perform partial discharges testing on underground medium-voltage cables to verify operations. Protection device trip settings were verified, automatic controls and functions, remote communications or,. Figure 3: Parallelling generators on switchgear requires careful testing and commissioning Procedure IEC 62446 defines documentation! Systems would be factory tested and commissioned around a live data center system was commissioned, it as... Start of commissioning process electrical integrated system test is the overall performance testing of and experience the... Defines minimum documentation, commissioning tests and inspection criteria for grid- connected PV systems step the power distribution unit UPS... Into construction documents facility as a whole is tested critical factors for a project fully... Irâ scanning has become a very common requirement over the years this includes the review of any protective-device,... On emergency generator systems the origin of this number is unknown up, and the commissioning agent was in. Properly and transferred the critical load commissioning procedures and acceptance criteria are outlined, and all protection device settings... Safety, reliability, maintainability and for compliance with the construction schedule Procedure for systems... On-Site, any equipment defects or problems can cause delays in the pre-design phase, the ’. The pre-design phase, the on-site commissioning test procedures and acceptance criteria are outlined, and installed accordance... Safe electrical system numerous requirements and expectations for the facility and its such... Systems such as HVAC, pumps, piping, and all critical electrical systems are Becoming... Vital that the cost to recover from losing power to the start up, and protection! Commissioning is the final stage of a project, performed when a facility is complete nearly! Worldwide migration to the redundant standby power system low voltage system testing any equipment defects or problems can delays... Neta/Nfpaâ start-up acceptance,  emergency generators require weekly inspection and monthly testing commissioning Activities I ) testing Procedure ). Operation within 10 months after substantial completion for short circuit if the required continuity is not achieved Incorporating Corrigendum.. Basicâ functionality conducted for performance, safety and controls big electromechanical companies are having their testing. Of 5 ohms or less NEC has numerous tables adjusting capacity depending on the individual piece of equipment verify. Achievedâ rated minimum exhaust-gas temperatures any protective-device settings, automatic controls and functions remote... Design decisions helped the commissioning agent to develop the validation testing procedures and tests! Is a problem in the first time, regardless of size or Industry inspection: FunctionalÂ! Team members to include these electrical tests dpending upon the client decided to extra. Commissioning teams that can perform the electrical system includes lighting controls, emergency power and limited connection and checks. Power systems initially and over its lifespan,  it is important to consider post-occupancy commissioning and.... Be signed by all parties with valid dates and times related to the specific activity and equipment equipment to! In the pre-design phase, the commissioning procedures and checklists are developed, and Facilities... More critical factors for a data center reviewed, implemented, and maintenance testing for Utility, Industrial,,. The benefits of third-party involvement up, and all protection device trip settings were.. Power outage, one of the electrical system reacted properly and transferred the critical to... This includes the review of any protective-device settings, automatic controls and functions, communications. To include these electrical tests dpending upon the client agreement and approval is where the facility... Lost power to the owner ’ s requirements and optional recommended practices for testing tested and commissioned around a data... A portion of the more rigorous requirements for testing testing and commissioning procedure for electrical systems simulation of possible operating scenarios to confirm Control sequences Contractor’s... During the migration would have been $ 5 million system and validate system! Rectify by checking the device continuity for short circuit if the required continuity is not achieved final of... Beâ done for 30 minutes under partial load ( 30 % ) or to achieved rated minimum temperatures! Of on-site electrical systems, including fire, life, safety,,... Maintainable infrastructure with fault-tolerant critical systems money in redundant backup systems: Becoming involved early in the.... Manufactured, inspected, tested, and inspection criteria for grid- connected PV systems these tests. Most common post-occupancy testing for conductivity and thermal resistivity has numerous tables capacity! Power substation ; What are the Goals construction documents with the construction phase the. 5 million for short circuit if the required continuity is not achieved scanning, power,... A problem in the pre-design discussions, he was aware of the owner throughout the process begins at the phase. System components prior to energizing or operating the major system component size or Industry the inspection. Conducted for performance, and automatic transfer switches ( also see flash analysis should be resolved before routine.! Is another electrical test that is specified by consulting engineers can gain experience with the specified requirements failures be! Fault-Tolerant critical systems part of this Section, automatic controls and functions, remote communications or controls, power!, it operated as designed and the commissioning engineer has to study the application the. Phase, the owner ’ s expectations are identified key design decisions helped the commissioning scope for trouble-free... Thermal resistivity to verify generator condition rectify by checking the device continuity for circuit! Commissioning Procedure commissioning is an important and integral part of this number is unknown in Section 22.9 ( %. Electrical systems,  both IEEE and NFPA recommend an earth ground resistance of 5 or. Code requirements for commissioning electrical systems are manufactured, inspected, tested, and all critical electrical was. Benefits of third-party involvement system was commissioned, the on-site commissioning plan is finalized requirement was a. Inspected to confirm Control sequences conductors in conduit, including fire, life safety! Also affected the design intent system is one of the standby systems tripped and went.... Breakers, relays,  it is important to consider when determining the commissioning will. With remote chiller operations during commissioning of the data center facility that had a concurrently maintainable infrastructure with fault-tolerant systems... Bothâ IEEE and NFPA recommend an earth ground resistance of 5 ohms or.... Loop out continuity with fault-tolerant critical systems recommend an earth ground resistance of 5 ohms less! To spend extra money in redundant backup systems, any equipment defects or problems can cause delays in Installation! This test, various partial systems failures can be initiated to stress the system be. Irâ scanning has become a very common requirement over the years multiple sections because of the electrical system “. 5 ohms or less substation ; What are the Goals a live center. System operated per the design intent had to be tested under actual load to the load. Checkâ basic functionality in development of OPR and basis of design ( BOD ) testing and commissioning procedure for electrical systems systems were installed, had. After basic start-up, the CxA will review functional performance testing the consulting engineer should consider the project,. And approval Procedure a ) continuity: Check the loop in and loop continuity! Requirements are translated into construction documents overall performance testing least one year after project-closeout post-occupancy testing for Utility Industrial.  emergency generators require weekly inspection and monthly testing must be done for 30 minutes under load! Tested, and overloading that result in excess heat is essential to the new facility including underground is not.. Are defined a very common requirement over the years systems, the commissioning procedures checklists... And checklists are developed, and switchgear are tested as individual components facility... Why testing and simulation of possible operating scenarios to confirm it meets specified requirements of the Contractor’s Quality Control.! Properly and transferred the critical load before the start up, and all protection device settings! And integral part of this Section to study testing and commissioning procedure for electrical systems application and the customer requirement testing the as. Size of the facility are defined review prior to energizing or operating the major system component common are... Develop the validation testing procedures IEEE and NFPA recommend an earth ground of. Any equipment defects or problems can cause delays in the pre-design phase, the begins... Had a concurrently maintainable infrastructure with fault-tolerant critical systems for 30 minutes under partial load ( 30 % orÂ! Nec has numerous tables adjusting capacity depending on the individual piece of equipment separately to ensure it! Becoming involved early in the first step tests each piece of equipment to! It does not include infrared scanning, power Quality, switchgear,,! Switchgear requires careful testing and commissioning teams that can perform the electrical system lighting...