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1 Current Date Standards Document Path..ppt SWITCHGEAR BIG GRAY BOXES SWITCHBOARD.

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Presentation on theme: "1 Current Date Standards Document Path..ppt SWITCHGEAR BIG GRAY BOXES SWITCHBOARD."— Presentation transcript:

1 1 Current Date Standards Document Path..ppt SWITCHGEAR BIG GRAY BOXES SWITCHBOARD

2 2 Current Date Standards Document Path..ppt

3 3 Current Date Standards Document Path..ppt

4 4 Current Date Standards Document Path..ppt Why Different Standards? ANSI vs UL

5 5 Current Date Standards Document Path..ppt Standards Comparison

6 6 Current Date Standards Document Path..ppt Standards Comparison (cont.)

7 7 Current Date Standards Document Path..ppt Comparison (cont.) Switchgear has Defined Short Time Withstand Ratings!

8 8 Current Date Standards Document Path..ppt Practice Comparison Switchgear maintenance permitted (not required by standard). Switchboard maintenance often not allowed.

9 9 Current Date Standards Document Path..ppt Side View

10 10 Current Date Standards Document Path..ppt Rear View

11 11 Current Date Standards Document Path..ppt Insulated Case vs Molded Case Insulated Case

12 12 Current Date Standards Document Path..ppt Old Vs New Insulated Case UL 1066 IRON FRAME ANSI

13 13 Current Date Standards Document Path..ppt Insulated Case vs Molded Case Molded Case

14 14 Current Date Standards Document Path..ppt Advantages of Insulated Case Vs Iron Frame Smaller footprint More reliable (Modular Design with Fewer Parts) Higher interrupting ratings Higher withstand ratings (30 Cycles) Reduced maintenance Electronic Trip Units Field Installable Trip Units Communications Power monitoring (2.5% Accuracy)

15 15 Current Date Standards Document Path..ppt Mechanical Construction Breaker Frames – Small : 800A ANSI, 1200A UL, 1600A IEC – Medium : – 800 to 3200A ANSI, – 800 to 3000A UL, – 800 to 4000A IEC – Large : – 4000 to 5000A ANSI, – 4000 to 6000A UL, – 4000 to 6300A IEC

16 16 Current Date Standards Document Path..ppt Organic Vs Iron Frame Very strong and lightweight Provides good insulation, isolation, and dielectric Molded to support and hold internal parts with no adjustments Fewer parts reduces complexity of assembly and maintenance The thermoset material of the organic case has several advantages:

17 17 Current Date Standards Document Path..ppt Organic Vs Iron Frame

18 18 Current Date Standards Document Path..ppt A LCD ammeter LED Bargraph P LCD All functions Display type H LCD All functions

19 19 Current Date Standards Document Path..ppt UL 891 Switchboards

20 20 Current Date Standards Document Path..ppt Switchboards

21 21 Current Date Standards Document Path..ppt Switchboards Typical Switchboard Ratings 5000 A Mains and Bus 1200 A and smaller group mounted Greater than 1200A Individally mounted Fixed or Drawout Front Connected UL 891 Gear UL 489 Breakers

22 22 Current Date Standards Document Path..ppt

23 23 Current Date Standards Document Path..ppt Hybred UL 891 Switchboards Mix Insulated Case and Molded Case Individially mounted – Front Connected – Rear Connected Individually mounted – Drawout – Fixed Group Mounted and Drawout Fusible and Circuit Breaker No requirement for isolation or – Barriers

24 24 Current Date Standards Document Path..ppt SWITCHGEAR BIG GRAY BOXES SWITCHBOARD


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