5/15 2
DOE
After a start signal is received to start a pump motor, a time delay is required to allow time for pre-lube to the pump. This would be an application for which type of timing relay?
on- delay
An ? timer is a device with a preset time period between energizing the timer or applying the input signal and the action of the timer output contacts. During the timing period, no change occurs in the timer output contacts
off- delay
An ? timer is a device with a preset time period that starts after the input signal is removed. The timer output contacts change when the input signal or external trigger is applied, and the contacts remain in the changed state until after the timing period
Open
Assume a DODE dashpot timer is configured with one normally closed contact with a time delay of 30 seconds. What is the position of the contact 20 seconds after power is removed from the coil?
Open
Assume a DODE dashpot timer is configured with one normally closed contact with a time delay of 30 seconds. What is the position of the contact immediately after power is applied to the coil?
Closed
Assume a DODE dashpot timer is configured with one normally closed contact with a time delay of 30 seconds. What is the position of the contact prior to power being applied to the coil?
Open
Assume a DOE timer is configured with one normally closed contact with a time-delay of 30 seconds. What is the position of the contact 30 seconds after power is applied to the coil?
closed
Assume a DOE timer is configured with one normally closed contact with a time-delay of 30 seconds. What is the position of the contact as soon as power is removed from the coil?
Closed
Assume a DOE timer is configured with one normally closed contact with a time-delay of 30 seconds. What is the position of the contact immediately after power is applied to the coil?
Closed
Assume a DOE timer is configured with one normally closed contact with a time-delay of 30 seconds. What is the position of the contact prior to power being applied to the coil?
True
Motor control drawings show their components in the "Normal" de-energized state.
DOE
Once initiated, ? contacts change state after a set time period has passed. Once the time has passed, all normally open timed contacts close and all normally closed timed contacts open.
electronic
The ? timing relay offers time delays over a greater range and with far better accuracy than the other two types of timing relays.
Mechanical
The ? timing relay typically uses a pneumatic device, and the slow release of air produces the delay.
10 A
The current carrying capacities for most timing relays is ? .
DODE
The off-delay timer function is also called a ? .
True
Timers enable a multitude of operations in a control circuit to be started and stopped at different intervals
DODE
What is the abbreviation for delay on de-energize?
instantaneous
What type of contacts activate when the timing relay is energized and return to their original state when the timing relay is de-energized?
DODE
Which timer is appropriate for keeping a motor starter energized after power is removed from the timer's power input?
