TPS, TVSS Product Selection Guide

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SurgeCalc - Siemens TPS product selection guide

This guide identifies a facilities surge susceptibility profile from the results of our succinct questionnaire. These results generate a surge index, which is used to aid in the select ion of properly sized TVSS devices for each IEEE facility location (C, B, and A).

Selection Steps

Answer each question by selection the appropriate answer from the corresponding pull down menu.
At the end of the questionnaire is an IEEE category selection pull down menu. It is defaulted to category C, which is for service entrance locations. Click on submit to see the TPS service entrance recommendations.
For category B and A locations, click on category pull down menu, and select the appropriate category. Once the new category is selected, click on submit, and new recommendation will be shown.

Most consultants will print out the results and include them with their project file.

With the help of SurgeCalc’s susceptibility profiling, consultants can quickly find a calculated recommendation instead of just guessing or relying on a manufacturer’s representative’s recommendation.

If you need further assistance, please contact the TPS technical support group at 888.333.3545.

SurgCalc Questionaire

1. Geographic location of the facility.

This can be determined by consulting an Isokeraunic map and finding the location of the facility. The Isokeraunic map will show the number of days lightning is experienced for any given location. Once this is done, using the IEEE classification, rate the location for high, medium, or low exposure.

2. Facility location relative to other buildings.

If the facility is in a rural location isolated from other structures, or on a hilltop the probability of a lightning induced transient is much higher than in an urban environment.

3. Adjacent Structures.

If the facility has a large antenna, water tower, or is the tallest building in the area it has a higher probability than a facility nestled among other structures.

4. Location of the facility on the utility service.

If the facility is on the end of the utility line transients will travel down the transmission line, or if there are other large industrials on the same line transients could be introduced on the line by these other facilities.

5. Utility history for an existing facility or for facilities being served by the same utility of a planned facility.

If there has been equipment disruption or equipment damage in an existing facility this is an indication of a high probability of transient activity. If this is a new facility, an inquiry to other facilities served by the same utility will give an indication of transient activity.

6. Consideration of the equipment being protected and the function this equipment performs as it applies to the facility mission.

If the equipment is supporting mission critical functions such as an on-line database, a continuous process control application, life support equipment, or other equipment that is essential for the operation of the facility it should have a high level of protection.

7. Expense to repair equipment.

If there is equipment within the facility that is very expensive to repair if damaged, such as MRI equipment, network controllers, CNC machinery etc. the level of protection should be high to avoid expensive repair bills.

IEEE C62.41 Category:

Recommended Products

IEEE C62.41 Exposure Index =

Internally Mounted			Externally Mounted

Facility Exposure (Application Level)

Calculated Exposure Index

IEEE C62.41.1	Low Exposure Exposure Index <35	Medium Exposure Exposure Index 35 to 65	High Exposure Exposure Index > 65
Category C (Service Entrance)	120kA to 160kA	160kA to 240kA	240kA to 400kA
Category B (Distribution Panel)	80kA to 120kA	80kA to 120kA	120kA to 160kA
Category A (Individual Circuits)	50kA to 80kA	50kA to 80kA	50kA to 80kA

Maximum Redundant Applications

IEEE C62.41.1	Low Exposure Exposure Index <35	Medium Exposure Exposure Index 35 to 65	High Exposure Exposure Index > 65
Category C (Service Entrance)	160kA to 240kA	320kA to 400kA	640kA to 800kA
Category B (Distribution Panel)	120kA to 160kA	160kA to 240kA	480kA to 640kA
Category A (Individual Circuits)	80kA to 120kA	120kA to 160kA	400kA to 480kA

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