• Product Guide
  • Medium Voltage Products and Systems
  • Service
  • AIS preliminary survey

AIS preliminary survey

AIS preliminary survey is a simple tool for evaluating the need for a more in-depth assessment carried out by ABB. Its use is strongly recommended for those plants where conventional maintenance strategies are still applied and no other assessment has been performed.

Check each environmental and operational condition, compare the plant situation with given range/status values and select one check button for each field group. Fill in the number of years since the last ABB assessment was performed and click on the Run check button to get the survey result.

Environmental conditions (Id numbers from 1 to 4) refer to the entire switchgear including the period in stock at site, whereas the operational conditions (Id from 5 to 10) relate to the most critical installed device.



Id Condition   Range/Status Choice
1 Ambient temperature IEC Tmin < -5°C and Tmax > 40°C
      Tmin < -5°C or Tmax > 40°C
      Tmin > -5°C and Tmax < 40°C
    ANSI Tmin < -22°F (-30°C) and Tmax > 104°F (40°C)
      Tmin < -22°F (-30°C) or Tmax> 104°F (40°C)
      Tmin > -22°F (-30°C) and Tmax < 104°F (40°C)
    GB Tmin < -25°C and Tmax > 40°C
      Tmin < -25°C or Tmax > 40°C
      Tmin > -25°C and Tmax < 40°C
2 Maximum relative humidity in substation Up to 60%
  60% to 90%
  90% and above
3 Salt or chemicals in the air   None
      Close to sea or industrial area position
      Marine or onshore or chemical plant position
4 Dust - ventilation in the substation   Air conditioned
    Ventilated with filters
    Not protected
5 Protection and control electronic devices Correct function
  Incorrect operation reported once
  False tripping or permanent incorrect function
6 Average load current (% of nominal) Up to 90%
  90% to 100%
  100% and above
7 Mechanical or load current circuit-breaker operations
(per year)		 Up to 10
  10 to 300
  300 to 500
  500 and above
8 Load current operation of contactor (per day)   Not installed in the plant
    Less than 5
    5 to 10
    More than 10
9 Fault current operation of circuit-breaker or contactor
(per year)		 Less than one
  One
  More than one
10 Racking in operations (per year)

Multiply by 10 times the operations if motor operated		   Less than 5
    5 to 10
    More than 10
Number of years from the last ABB assessment
Survey result
Perform this survey on a yearly basis A more in-depth asset condition and risk assessment by ABB is needed A more in-depth asset condition and risk assessment by ABB is urgently needed
Please, select one check button for each field group.


    •   Cancel
      • Twitter
      • Facebook
      • LinkedIn
      • Weibo
      • Print
      • Email
    •   Cancel

    Your preferences:

    ABB contact for Ireland

    Sales: Keith Doyle
    Service: Keith Doyle

    Links

    db0003db004279 2017b81aeb70d256c1257911002b2abb