Power-Grounding-Lightning Protection Site Survey
VSAT equipment together with most other communications and computer equipment is very sensitive to unstable power supply, improper grid design and out of specs implementation. Power related problems that may have a direct negative effect on the performance of such equipment could be:
- Blackout: Complete loss of power - very typical problem for many people and businesses;
- Sag or Brownout: Decrease in voltage levels which can last for periods ranging from fractions of a second to hours. Sag can be caused by heavy equipment coming on line such as tools, elevators, compressors etc. It also frequently occurs when utility companies deliberately do this to cope with peak load times.
- Spike: This is a tremendous increase in voltage over a very short period of time often caused by a direct lightning strike on a power line or when power returns after a blackout.
- Surge: This is a substantial increase in voltage lasting a small fraction of a second, often caused when high powered appliances such as air conditioners are switched off.
- EMI/RFI Noise: Electro Magnetic Interference and Radio Frequency Interference. Caused by lack of electrical earthing, lightning, generators, radio transmitters, industrial equipment etc.
Some or all of the above listed incidents or situations are likely to be expected at certain Customer facilities around the world. The negative impact can be mitigated or controlled through better understanding and recognising the problem and appropriate follow up action.
NWNS can help analysing the local situation and help its customer to better understand the power quality problems they may have and how to fix or mitigate them. The ultimate goal of a NWNS Power Site Survey is to reduce down time and saving money on equipment replacement.
Like all electrical and/or electronic equipment troubleshooting, site surveys rely on state-of-the-art diagnostic test equipment and the intuitive nature of the person using this equipment. Although most of us would like to think we are fully capable of doing such work, varying levels of expertise may prevent us from successfully resolving a power quality issue.
You simply need expertise, applying proper test methods.
NWNS has the expertise and the diagnostic equipment and an organised approach. We ensure an effective investigation, proper data collection, accurate conclusions, and cost-effective recommendations.
How we work:
- Step 1: Customer submits a request + problem description. We are asking customer to use our low entry on-line questionnaire which is a “walk-through” and our organised way to gather the basic facts necessary to define the problem.
- Step 2: NWNS reviews the received information and identifies the power quality concern. NWNS will discuss with the Customer what course of action best serves the site's needs.
- Step 3: NWNS dispatches a skilled certified engineer to conduct a power survey (if desired). He or she will organise and perform the site analysis which include a long list of predefined tests and measurements. Most surveys will fall into one of the following categories:
- Level 1 survey: This covers the visual inspection, testing, and analysis of the AC premises wiring and grounding system supplying the affected equipment;
- Level 2 survey: This includes a Level 1 survey plus monitoring the applied AC voltage and load current of affected equipment;
- Level 3 survey: This consists of the Level 1 and 2 surveys plus monitoring environmental site conditions. A detailed look at possible radio frequency interference (RFI), electromagnetic interference (EMI), electrostatic discharge (ESD), and improper levels of temperature/humidity.
- Step 4: NWNS will produce a professional evaluation report and provide recommendations to cost-effective solutions. The report will also include potential safety hazards, suspected problem areas, and possible solutions.
Many power quality problems are in a way related to the wiring and grounding system. This is why NWNS does not want to overcomplicate things hence we don’t assume anything. First, we take a step back and take a look if things don’t look right. Then we follow common sense rules.
Improper neutral-ground bonds in branch circuit panel boards, incorrectly installed Isolated Ground (IG) systems, overcrowded branch circuits, and poorly maintained earthing systems are just some of the conditions we frequently identify as trained observer through visual inspection. Not to mention unsafe conditions for personnel ….More Information:
NWNS is happy to discuss your "problem" and to jointly find a solution at no charge. NWNS only charges for physical surveys at location. Please submit your on-line request for a quotation
or contact NWNS via email