Fire Pump Transfer Switch Basics
•Transferir como PPT, PDF•
5 gostaram•3,892 visualizações
www.Lucky-Bet.site => Bet on Sports - 50% Deposit Bonus www.Lucky-Bet.site/casino => Online Casino - 5000$ Welcome Bonus www.Lucky-Bet.site/lotto247 => Lotto247 - Win Big, Live Free www.Lucky-Bet.site/eurobet => Best European Bookmaker www.earnperhit.com/essay => Professional academic writing Fire Pump Transfer Switch Application and Design Criteria
![Topics to be Covered ,[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recomendados
Recomendados
Mais conteúdo relacionado
Mais procurados
Mais procurados (20)
Destaque
Destaque (8)
Semelhante a Fire Pump Transfer Switch Basics
Semelhante a Fire Pump Transfer Switch Basics (20)
Mais de James S Nasby
Mais de James S Nasby (14)
Último
Último (20)
Fire Pump Transfer Switch Basics
- 1. Power Transfer Swtiches - for - F.M. Approvals - by - James S. Nasby Columbia Engineering
- 7. Arrangement I – Combo. Unit
- 8. Short Circuit (WIC) Coordination Note: “---” means no Upstream Protection is Required. E.g.: Self Protecting (Blow Apart) Isolating Switch Provides Suitable Protection of the Internal Transfer Switch.
- 10. Russelectric F.P. Transfer Switch
- 12. WIC Coordination Example Transfer Switch Sizing Example for 100 Hp at 460 Vac X 115% Thermal X 600% Breaker WIC Coord. Motor Hp Motor FLA Thermal Sizing Upstream Size Switch Size 100 Hp 124 amps 143 amps 150 amp 744 amp 800 amp 400 amp In this Example, a 150 Amp Xfer Switch meets the 115% criteria; but, it’s Short Circuit (WIC) Rating will be invalid if the upstream device is larger than 250 amps. However, a 250 Amp OCP doesn’t meet the 600% criteria. Hence, a larger Xfer switch is needed. Who does the coordination, and who supplies what?
- 13. Are All of These Supplied? 1) The two Position Indicator lights 2) The Engine Start delay timer and the Re-Transfer delay timer, 3) The Engine Start contacts, 4) The Test (Transfer) switch (pushbutton), maybe. 5) The Normal Side Service Disconnect and overcurrent protection fuses or breaker, 6) Otherwise, the required emergency side Isolating Switch which is: 7) Lockable "ON" 8) Having an external "Fire Pump Isolating Switch" placard, 9) A placard next to the controller giving the location of this Isolating Switch 10) Supervision of the Isolating Switch by one of the four means given 11) Audible and visible alarm to indicate Isolating Switch Open, 12) Isolating Switch contacts for remote alarm, 13) Means to prevent Higher-than-Normal motor in-rush currents, 14) Phase reversal sensing and transfer circuitry. 15) Although not required, the Bypass switch may or may not be standard equipment.
- 15. Questions ?