Overload relays

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

• true

• false

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

• true

• false

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

• true

• false

Magnetic type overload relays are sensitive to ambient temperature

• true

• false

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).

• true

• false

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

• circuit breakers

• relays

• diodes

• contactors

Motor starting current is referred to as _________ current.

• locked in

• starting

• inrush

• overload

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

• fast acting

• dual element

Overload relays are divided into two separate sections. What are the two sections? (pick 2)

• current sensing

• contact

• normally open

• normally closed

How do magnetic type overload relays operate?

• sensing the strength of the magnetic field produced by the current flow to the motor

• .