Engineering & Consulting
History of Damages
To begin the process of an engineered solution for the prevention of lightning and associated damages, it is necessary to collect in-depth information on the history of the site related to any and all events previously sustained by the facility.
ALP Systems takes the time to listen to the personnel who are directly involved in order to obtain an understanding of the facility’s possible insufficiencies. We may also work with the facility manager or engineer to review the financial history of repairs to construct a timeline of the damages and expenses incurred from the suspected lightning or power quality issues. We will then review the information to create a site-specific solution that will meet, and, or likely exceed the customer’s expectations.
Evaluation of Site Plans
Our engineers can review the facility’s structural plans, building elevations, roof plans, grounding system design, one-line electrical & data riser diagrams in order to determine if the existing systems, if any, need to be updated or replaced. If enough data is available, upgrades or new system requirements can be proposed based on available data while reducing the expense of an on-site visit.
On-Site Evaluation of Lightning Protection Systems
ALP Systems provides highly trained and experienced personnel for on-site evaluations. ALP’s professional’s will note the structure’s construction type, dimensions, rooftop specifics, service utilities and document any potentially vulnerable hazards. We also inspect, and record the placement, integrity, and size of any air terminals, down conductors, conductor clamps, and fasteners. We will review and note all services entering and leaving the structure as well as inspecting all bonding connections as per code of these services. Our site survey summary will list any non-compliance with the specifications of lightning protection system Std. UL96A and Std. NFPA780.
Grounding System Testing
ALP Systems has the trained personnel, the expertise and the precise equipment to perform grounding systems testing. We can execute Fall of Potential Tests, 3 point 62% method, 4 point soil resistivity and the 2 Point Tests as per IEEE Std. 81 to evaluate the impedance of existing grounding system or soil resistivity. We perform visual inspections of external grounding systems and internal bonding systems and list any non-compliance with the specifications of IEEE Std. 142 and IEEE Std. 1100. Our trained personnel can also perform 4 Point Soil Resistance tests and use IEEE Std. 80 to design new service ground systems. If required, our engineers can create grounding system designs for any application, soil condition or specification.
A vital part of any lightning protection system is to provide surge suppression on all critical A/C & D/C power circuits and data lines that have the potential to carry transients into critical equipment. As part of our on-site evaluation we can provide an inspection of power and data line distribution systems that include:
- Noting critical loads on the power distribution system and data control system and walk upstream to note location and specification of each distribution node.
- Note specifications and location of any surge suppression device installed and if so, confirm that the existing surge protection devices are operational, installed correctly and comply with UL 1449 4th edition standards.
- List compliance of surge suppression devices as per IEEE Std. C62.72 and IEEE Std. 1100 categorize each distribution mode as per IEEE Std. C62.41 and select appropriate category of surge suppression devices.
- Verify device location placement (cascading) and let thru voltage coordination in compliance with IEEE Std. C62.72
- Provide risk assessment analysis in compliance with IEC 62305-2 if required by the facility owner.
System Design and Installation Drawings
ALP Systems can use existing CAD, DWG or PDF. drawings to highlight upgrades, design new systems or can create new CAD models using detailed notes acquired during a site evaluation (if as-built soft copy drawings are not available). ALP’s design engineers can create lightning protection system designs, grounding system designs and installation details including product cut sheet submittals. We can also create surge suppression system details incorporated into riser diagrams or power distribution diagrams.