Deck 4: Overload Relays

Question 1

What are the two types of thermal overloads?

Answer 1

Thermal overloads can be divided into two types: solder melting type or solder pot, and bimetal strip.

Question 2

Fuses which are intended to provide both short circuit protection and overload protection are called ____________________ time delay fuses.

Answer 2

dual element

Question 3

Magnetic type overload relays are sensitive to ambient temperature.

Answer 3

False

Question 4

Thermal overload relays trip faster when located in a cool area than in a warm area.

Question 5

Fuses and ____________________ are designed to protect the circuit from a direct ground or short-circuit condition.

Question 6

What does it mean for a current transformer to have a ratio of 150:5?

Question 7

How do magnetic type overload relays operate?

Question 8

One common use for the normally open set of contacts on an overload relay is to provide an input signal to a programmable logic controller (PLC).

Question 9

Solder melting type overloads are often called solder ____________________ overloads.

Question 10

Motor starting current is referred to as ____________________ current.

Question 11

Overload relays are designed to open the circuit when the current becomes 115 percent to 125 percent of the motor full load current.

Question 12

Magnetic overload relays can be divided into two major types: electronic and ____________________.

Question 13

Overload relays are divided into two separate sections. What are the two sections?

Question 14

What are the elements of a single pole double throw switch arrangement?

Question 15

Many bimetal strip type overload relays can be set for either manual or automatic reset.