An mov burns out - Study guides, Class notes & Summaries

A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required? - Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - Replace it with a larger MOV On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the break. What is the issue? - Suicide Circuit You have an old DC motor ...

A contractor wants to raise the car speed from 100 fpm to 125 fpm, it currently has a 12" sheave. What is required? - Answer-100 fpm/125 fpm= 12"/ X =15 A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - Answer-Replace it with a larger MOV - 630 On a Ward-Leonard circuit the brake is set, but the motor is trying to slip through the brake. What is the issue? - Answer-Suicide Circuit - 425 You have an old DC motor and are...

A contractor wants to raise the car speed from 100 fpm to 125 fpm, it currently has a 12" sheave. What is required? - 100 fpm/125 fpm= 12"/ X =15 A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - Replace it with a larger MOV - 630 On a Ward-Leonard circuit the brake is set, but the motor is trying to slip through the brake. What is the issue? - Suicide Circuit - 425 You have an old DC motor and are adding an SCR drive, wh...

A contractor wants to raise the car speed from 100 fpm to 125 fpm, it currently has a 12" sheave. What is required? - 100 fpm/125 fpm= 12"/ X =15 A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - Replace it with a larger MOV - 630 On a Ward-Leonard circuit the brake is set, but the motor is trying to slip through the brake. What is the issue? - Suicide Circuit - 425 You have an old DC motor and are adding an SCR drive, wh...

Elevator Mechanic Exam ReviewA contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required? - correct answer Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - correct answer Replace it with a larger MOV On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the break. Wha...

Elevator Mechanic Exam ReviewA contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required? - correct answer Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - correct answer Replace it with a larger MOV On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the break. Wha...

An MOV burns out, you replace it but cannot read voltage or resistance. What should you do? Replace it with a larger one (630) * On a Ward-Leonard circuit, the brake is set but the motor is trying to slip through the brake. What circuit is the issue? Suicide circuit (425) ** A Hydro runs up with no load but does not run up with a full load. What is the issue? The relief valve is set too low (805) ** Runby for a 1:1 car hits the CWT buffer 4" below the top landing. The CW...

A contractor wants to raise the car speed from 100 fpm to 125 fpm, it currently has a 12" sheave. What is required? - ANSWER-100 fpm/125 fpm= 12"/ X =15 A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - ANSWER-Replace it with a larger MOV - 630 On a Ward-Leonard circuit the brake is set, but the motor is trying to slip through the brake. What is the issue? - ANSWER-Suicide Circuit - 425 You have an old DC motor and are ad...

Mechanics Exam Review-NEIEP Exam Test Questions with Correct Answers A contractor wants to raise the car speed from 100 fpm to 125 fpm, it currently has a 12" sheave. What is required? 100 fpm/125 fpm= 12"/ X =15 A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? Replace it with a larger MOV - 630 On a Ward-Leonard circuit the brake is set, but the motor is trying to slip through the brake. What is the issue? Suicide C...

A contractor wants to raise the car speed from 100 fpm to 125 fpm, it currently has a 12" sheave. What is required? ANSWER: 100 fpm/125 fpm= 12"/ X =15 A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? ANSWER: Replace it with a larger MOV - 630 On a Ward-Leonard circuit the brake is set, but the motor is trying to slip through the brake. What is the issue? ANSWER: Suicide Circuit - 425 You have an old DC motor and ...