Quiz - Automatic Transfer Switches (ATL Series )

1. Final quiz.

Test your knowledge about the ATL series. Are you ready? Then start and don't worry about making mistakes, repeat the test as many times as you want.

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* 1. ATL 500 is provided with two potentiometers on the back, one for each line
(LINE 1 and LINE 2), which can be used for the following functions:

setting of the line presence delays (default setting)

setting the communication channel (Ethernet, RS485, ...)

adjusting the room temperature

setting of the tripping delays of the protection thresholds

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* 2. In ATL800 and ATL900 two counters are used for maintanance puproses:

to monitor the working hours

to count the number of breaker operations

to count the number of maintenance operations

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* 3. Definition of closed transition (close before open):

The load will be transferred without continuity of energy supply. For some instant the load it is disconnected completely from the energy sources.

The sources are synchronised (where possible) or spontaneous synchronisation will be expected within a limit time. The synchronisation thresholds (delta voltage, delta frequency, delta phase angle) are programmable. In presence of all synchronisation conditions the load will be transferred with closed transition and instantaneous parallel with continuity of power supply to the load.

In this case, the synchronisation conditions will be sought but transfer will occur in all cases with the open transition. In this case, the load is passed to a new source where the amplitude and phase of which is synchronised with the previous one but without continuity of power supply to the load.

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* 4. ATL900 is an automatic transfer switch controllers that cover advanced and high end applications on power transfer through three power sources. How many tie-brakers are managed?

one tie-breaker

two tie-breakers

three tie-breakers

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* 5. The devices used for the changeover are:

contactors

motorizes changeover switches

motorized circuit breakers (MCCB, ACB)

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* 6. The ATL series devices can be used to switch between:

Generator-Generator (G-G): systems that use multiple generators as the prime power source

a three way system including all above: these systems combine two utility sources and one backup generator for sensitive areas (e.g. jails and military bases). These are mostly referred as dual stand by systems having two backup and over all three power sources.

Utility-Generator (U-G): facilities that have both utility and income power and uses generators for backup only

Utility-Utility (U-U): systems operating utility feeds on both ends

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* 7. For each line the ATL 500 monitors the status of the voltage and the frequency to detect if the line is available and all the parameters are within the correct limits. Which ofhe following controls are performed?

minimum and maximum frequency.

voltage asymmetry

minimum and maximum voltage

phase sequence and phase loss

Quiz - Automatic Transfer Switches (ATL Series )

1. Final quiz.

Question Title

* 1. ATL 500 is provided with two potentiometers on the back, one for each line (LINE 1 and LINE 2), which can be used for the following functions:

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* 2. In ATL800 and ATL900 two counters are used for maintanance puproses:

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* 3. Definition of closed transition (close before open):

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* 4. ATL900 is an automatic transfer switch controllers that cover advanced and high end applications on power transfer through three power sources. How many tie-brakers are managed?

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* 5. The devices used for the changeover are:

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* 6. The ATL series devices can be used to switch between:

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* 7. For each line the ATL 500 monitors the status of the voltage and the frequency to detect if the line is available and all the parameters are within the correct limits. Which ofhe following controls are performed?

* 1. ATL 500 is provided with two potentiometers on the back, one for each line
(LINE 1 and LINE 2), which can be used for the following functions: