Post Quiz - Day 2 - Controlgear, Motor & PFC

What is the range of 4P Contactors available with BCH?

• 10A to 300A AC1
• 20A to 500A AC1
• 20A to 400A AC3
• 40A to 400A AC1

AC3 duty is a

• Utilization category
• Temp. Category
• Power Category
• Voltage Category

While selecting a contactor which the following parameters to be considered?

• Type of load
• Current rating
• Ambient Temp.
• All of them

Why EOCR is a better solution for motor protection compared to thermal overload relays?

• Provides various protections
• High accuracy
• Selectable trip time
• All of them

If the trip class of a thermal overload relay is 10A then what will be its tripping time in seconds at 7.2 times of set current?

• 4 to 10 sec
• 6 to 20 sec
• 2 to 10 sec
• 2 to 20 sec

For which Ampere rating external CT is to be used in EOCR

• 15A
• 30A
• 60A
• 200A

Why Shaded Ring is used in AC Contactor Magnet Core

• To avoid Chattering
• To increase Coil Flux
• To reduce Coil Consumption
• To reduce eddy Current

BCH Offer AC/DC Electronic Coil in which range of Contactor

• 9A to 12A
• 110A to 175A
• 40A - 73A
• 700A to 1200A

What are main USPs of Freedom Series Contactor

• Operating Temp -20ºC to 60ºC
• Front Access of Contacts
• Availablilty of Spare Kits instead of Housing
• All of these

If power factor is less than unity then it will result in

• Large kVA rating of equipment
• Greater conductor size
• Electricity penality
• All of these