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Telmex 2018

• 1.

La función de los inversores es la de convertir una fuente de ______ nominales, en una fuente de 120 VCA a 60 Hz una fase

• A.

220 vca

• B.

-48 vcd

• C.

440 vca

• D.

60 vcd

B. -48 vcd
Explanation
The correct answer is -48 vcd. The question is asking about the function of inverters, which is to convert a source of nominal voltage into a single-phase 120 VAC, 60 Hz source. Among the given options, -48 vcd is the only one that is not an AC voltage. Inverters typically convert DC voltage into AC voltage, so -48 vcd would be the most suitable option.

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• 2.

La capacidad del inversor individual WAA502B es de

• A.

502 KVA

• B.

10 KVA

• C.

.5 KVA

• D.

100 KVA

C. .5 KVA
Explanation
The correct answer is .5 KVA. This suggests that the individual WAA502B inverter has a capacity of 0.5 KVA.

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• 3.

• A.

2*WAA602B

• B.

2*WAA103B

• C.

2*WAA203B

• D.

2*WAA502B

D. 2*WAA502B
• 4.

La capacidad del inversor individual WA103B es de:

• A.

10 KVA

• B.

100 KVA

• C.

5 KVA

• D.

103 KVA

A. 10 KVA
Explanation
The correct answer is 10 KVA. This means that the individual WA103B inverter has a capacity of 10 kilovolt-amperes. KVA is a unit used to measure the apparent power in an electrical system. In this case, the inverter is capable of handling a maximum load of 10 KVA, indicating its power capacity.

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• 5.

El Sistema de inversores de prioridad (ocho principales y uno de reserva) de 10 KVA de potencia se indica como

• A.

9*WAA602B

• B.

9*WAA103B

• C.

9*WAA203B

• D.

9*WAA502B

B. 9*WAA103B
Explanation
The given answer, 9*WAA103B, is the correct answer because it matches the pattern of the other options provided. All the options start with "9*WAA" followed by a three-digit number. Therefore, the correct option should also follow this pattern, which is 9*WAA103B.

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• 6.

En caso de que el inversor este alambrado para la ____, este normalmente alimenta a la carga y a la linea comercial de C.A. sirve como una fuente de respaldo:

• A.

Opcion R

• B.

Opcion S

• C.

Opcion T

• D.

Opcion V

C. Opcion T
Explanation
If the inverter is wired for "backfeeding," it means that it is connected in such a way that it can supply power to both the load and the commercial AC line. This configuration allows the inverter to act as a backup power source, providing electricity to the load while also feeding excess power back into the commercial AC line. Therefore, option T is the correct answer.

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• 7.

Es un accesorio designado como opcion Z, y proporciona una salida de 208, 220 o 240 VCA.

• A.

• B.

• C.

Circuito de sincronia de frecuencia

• D.

Accesorio de corte de alarma audible

Explanation
The correct answer is "Autotransformador de salida." This is because the given statement mentions that the accessory is designated as option Z and provides an output of 208, 220, or 240 VAC. An autotransformer is a type of transformer that has a single winding and can step up or step down the voltage levels. In this case, it is used to provide the specified output voltage range.

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• 8.

El rango de entrada del inversor, en el cual se da el corte por entrada baja, tiene un valor entre

• A.

39 a 41 VCD

• B.

43 a 46 VCD

• C.

42 a 43 VCD

• D.

36 a 38 VCD

A. 39 a 41 VCD
Explanation
The correct answer is 39 to 41 VCD. This is the range of input voltage at which the inverter will cut off due to low input voltage.

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• 9.

En el caso de que el voltaje de salida del inversor caiga por debajo de _____, la carga automaticamente sera transferida a la linea de C.A.

• A.

-48 VCD

• B.

110 VCA

• C.

-50 VCD

• D.

108 VCA

D. 108 VCA
Explanation
Cuando el voltaje de salida del inversor cae por debajo de 108 VCA, la carga se transferirÃ¡ automÃ¡ticamente a la lÃ­nea de corriente alterna (C.A.). Este umbral de voltaje se establece como el punto en el que el inversor ya no puede proporcionar la energÃ­a necesaria para alimentar la carga, por lo que se activa un mecanismo de transferencia para utilizar la energÃ­a de la lÃ­nea de C.A. y mantener la alimentaciÃ³n de la carga.

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• 10.

La carga sera transferida al inversor de reserva cuando la tension de alimentacion caiga por debajo de:

• A.

38 VCD

• B.

41 VCD

• C.

40 VCD

• D.

39 VCD

B. 41 VCD
Explanation
The correct answer is 41 VCD. This means that when the supply voltage falls below 41 VCD, the load will be transferred to the backup inverter.

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• 11.

Las dos tensiones de salida del sistema de inversores 2*WAA502 son de

• A.

127 Y 480 VCA

• B.

220 Y 440 VCA

• C.

120 Y 220 VCA

• D.

220 Y 480 VCA

C. 120 Y 220 VCA
Explanation
The correct answer is 120 Y 220 VCA. This means that the output voltages of the 2*WAA502 inverter system are 120 V and 220 V in alternating current (VCA).

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• 12.

En el rango de voltaje de salida del sistema de inversores 2*WAA502B se encuentra entre

• A.

130 Y 142 VCA

• B.

127 Y 142 VCA

• C.

100 Y 109 VCA

• D.

110 y 126 VCA

D. 110 y 126 VCA
Explanation
The correct answer is 110 y 126 VCA. This is because the question is asking for the range of output voltage of the inverters 2*WAA502B. The given answer range falls within the specified voltage range of 110 to 126 VCA.

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• 13.

El rango de voltaje de entrada del sistema de inversores 2*WAA502B se encuentra entre

• A.

39 a 53 VCD, Tierra negativa

• B.

42 a 56 VCD, Tierra positiva

• C.

40 a 54 VCD, Tierra negativa

• D.

41 a 55 VCD, Tierra positiva

B. 42 a 56 VCD, Tierra positiva
Explanation
The correct answer is 42 to 56 VDC, positive ground. This means that the input voltage range for the 2*WAA502B inverter system is between 42 and 56 volts DC, with a positive ground. This information is important for ensuring that the system is supplied with the correct voltage and ground configuration for proper operation.

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• 14.

Se encarga de gobernar el funcionamiento del inversor de reserva, e incluye una tarjeta de señalización

• A.

Bastidor de Control y DistribuciÃ³n

• B.

• C.

Circuito de C.A.

• D.

Tarjeta de control y transferencia

A. Bastidor de Control y DistribuciÃ³n
Explanation
The correct answer is "Bastidor de Control y DistribuciÃ³n" because it is responsible for governing the operation of the reserve inverter and includes a signaling card. This component is essential for controlling and distributing power in a system, ensuring that the reserve inverter functions properly and that power is transferred effectively.

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• 15.

El circuito encargado de determintar cual es el inversor que recibira respaldo, por parte del inversor de reserva es:

• A.

Circuito de transferencia

• B.

Circuito de alarmas

• C.

• D.

Circuito de control de frecuencia

Explanation
The correct answer is "Circuito de prioridad". This circuit is responsible for determining which inverter will receive backup from the reserve inverter. It prioritizes the order in which the inverters are supported, ensuring that the most important or critical equipment is given priority in case of a power failure.

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• 16.

La etapa compuesta por transistores que se encarga de Amplificar las señales lógicas en el circuito de prioridad es denominada

• A.

• B.

Control de sincronia de frecuencia

• C.

Etapa de Potencia

• D.

Control de transferencia

C. Etapa de Potencia
Explanation
The correct answer is "Etapa de Potencia". This stage is responsible for amplifying the logical signals in the priority circuit. It is the stage where the power amplification takes place, allowing the signals to be boosted and transmitted effectively.

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• 17.

El indicador dentro de la tarjeta de señalizacion  PLM-51081, el cual representa una señal de respaldo en cualquiera de los inversores tiene un color

• A.

Verde

• B.

Rojo

• C.

Ambar

• D.

Ninguno de los anteriores

C. Ambar
Explanation
The correct answer is "Ambar" because the question is asking about the color of the indicator inside the signaling card PLM-51081, which represents a backup signal in any of the inverters. "Ambar" is the correct spelling of the color "Amber" in Spanish, which is a yellowish-orange color commonly used for warning or caution signals.

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• 18.

Pertenece a una de las alarmas que utilizan tanto la tarjeta de señalizacion como el circuito de prioridad

• A.

Falla de fusible externa

• B.

Falla de alimentacion de CA

• C.

Falla de alimentacion de CD

• D.

Falla de salida del inversor

D. Falla de salida del inversor
Explanation
This answer suggests that the failure lies in the output of the inverter. The inverter is responsible for converting DC power to AC power, so if there is a failure in the output of the inverter, it means that the AC power is not being properly supplied. This could result in the alarm not functioning correctly or not receiving the necessary power to operate.

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• 19.

Una de las alarmas que maneja la tarjeta de señalizacion PLM-51081 y el circuito con prioridad 5*WAA502B es:

• A.

Falla de transferencia de inversor

• B.

Falla de fusible

• C.

Falla por bajo voltaje de entrada

• D.

Falla por alto voltaje de entrada

A. Falla de transferencia de inversor
Explanation
La tarjeta de seÃ±alizaciÃ³n PLM-51081 y el circuito con prioridad 5*WAA502B estÃ¡n diseÃ±ados para detectar y manejar diversas alarmas. En este caso, la respuesta correcta es "Falla de transferencia de inversor". Esto significa que si hay un problema con la transferencia de energÃ­a del inversor, la tarjeta de seÃ±alizaciÃ³n y el circuito con prioridad estarÃ¡n preparados para detectar y responder a esta falla. Esta alarma es importante ya que indica un problema en el sistema de inversor, lo que puede afectar la operaciÃ³n y el rendimiento general del equipo.

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• 20.

La capacidad en amperes del fusible que se utiliza en el bastidor de distribucion de corriente, para alimentar cada uno de los inversores tiene un valor de:

• A.

200 A

• B.

150 A

• C.

300 A

• D.

100 A

A. 200 A
Explanation
The correct answer is 200 A. This means that the fuse capacity used in the current distribution frame to power each of the inverters is 200 amperes.

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• 21.

Este circuito proporciona una trayectoria de carga para los capacitores de los filtros de C.D.

• A.

Circuito precarga/arranque

• B.

Circuito de alarma de falla de fusible

• C.

• D.

Circuito de disparo de tiristores

A. Circuito precarga/arranque
Explanation
This circuit is designed to provide a charging path for the capacitors of the DC filters. It is used to pre-charge and start the circuit.

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• 22.

La función del fusible F4 dentro del circuito inversor de onda cuadrada es la de proporcionar proteccion instantanea contra ______

• A.

Sobretension

• B.

Baja corriente

• C.

Sobrecarga

• D.

Bajo voltaje

C. Sobrecarga
Explanation
The function of the fuse F4 within the square wave inverter circuit is to provide instant protection against overload. When the current flowing through the circuit exceeds the rated capacity of the components, the fuse will blow and interrupt the flow of current, preventing any damage to the circuit. This helps to ensure the safety and proper functioning of the inverter system.

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• 23.

Si ocurriera una perdida total del voltaje de C.A. hacia la carga, se activara:

• A.

• B.

Alarma falla de fusible

• C.

Alarma falla de salida

• D.

Alarma falla inversor

C. Alarma falla de salida
Explanation
If there is a total loss of AC voltage to the load, the "Alarma falla de salida" (output failure alarm) will be activated. This alarm indicates that there is a failure in the output of the system, which could be caused by various factors such as a faulty inverter or a problem with the load itself. It serves as a warning for the user to investigate and address the issue to restore the power supply to the load.

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• 24.

Este circuito determinara la frecuencia de salida del inversor de CA

• A.

Circuito de fuente de alimentacion

• B.

Circuito de secuencia de arranque

• C.

Circuito de precarga/arranque

• D.

Circuito de disparo de tiristores

D. Circuito de disparo de tiristores
Explanation
This circuit determines the output frequency of the AC inverter. The circuit is responsible for triggering the thyristors, which are semiconductor devices used for controlling the flow of electric current. By controlling the triggering of the thyristors, the circuit can regulate the frequency of the output waveform produced by the AC inverter.

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• 25.

Se encarga de determinar la frecuencia de salida del inversor de CA dentro de la tarjeta de disparo de tiristores (A1)

• A.

Circuito de fuente de alimentaciÃ³n

• B.

Circuito de secuencia de arranque

• C.

Circuito inhibidor del inversor

• D.

Circuito de disparo de tiristores

D. Circuito de disparo de tiristores
Explanation
The correct answer is "Circuito de disparo de tiristores." This circuit is responsible for determining the output frequency of the AC inverter within the thyristor firing card (A1). It controls the timing and triggering of the thyristors, which are semiconductor devices used to control the flow of electric current. By controlling the firing of the thyristors, the circuit can regulate the frequency of the AC output from the inverter.

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• 26.

Es la frecuencia de la onda rectangular a la salida de la terminal 3 de A2 del circuito de disparo de tiristores

• A.

240 Hz

• B.

180 Hz

• C.

120 Hz

• D.

60Hz

A. 240 Hz
Explanation
The correct answer is 240 Hz. This is the frequency of the rectangular wave at the output of terminal 3 of A2 in the thyristor firing circuit.

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• 27.

Dentro del circuito de disparo de tiristores, la frecuencia de los pulsos de 2B-5/5, esta determinada por los elementos:

• A.

C9, 10 Y C13

• B.

R1, R2, Y C5

• C.

C4, CR9 Y R10

• D.

R20, CR18 Y R12

B. R1, R2, Y C5
Explanation
The correct answer is R1, R2, and C5. These elements determine the frequency of the pulses in the thyristor triggering circuit. R1 and R2 are resistors that control the charging and discharging time of the capacitor C5, which in turn determines the frequency of the pulses. By adjusting the values of R1, R2, and C5, the frequency of the pulses can be controlled.

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• 28.

Pertenece a la tarjeta de disparo de tiristores A1 del inveersor WAA103B

• A.

• B.

Inhibicion por bajo voltaje de entrada

• C.

Tarjeta por bajo voltaje de entrada

• D.

Circuito de control de sincronia y frecuencia

B. Inhibicion por bajo voltaje de entrada
Explanation
The correct answer is "InhibiciÃ³n por bajo voltaje de entrada." This means that the circuit has a feature that inhibits or prevents operation when the input voltage is too low. This can be important for protecting the circuit and ensuring proper functioning.

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• 29.

Los elementos cuya funcion son la de proporcionar supresion de ruido EMI, en el circuito de salida del inversor:

• A.

L1 CR1 Y K7

• B.

L2 CR6 Y CR7

• C.

L4 C36 Y C37

• D.

L5 C29 Y C30

C. L4 C36 Y C37
Explanation
L4, C36, and C37 are the elements that provide EMI noise suppression in the output circuit of the inverter.

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• 30.

Cuando existe una falla en el inversor WAA103B (10 KVA), el fusible que abre debido a una corriente excesiva es:

• A.

F1

• B.

F2

• C.

F3

• D.

F4

D. F4
Explanation
When there is a fault in the WAA103B (10 KVA) inverter, the fuse that opens due to excessive current is F4.

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• 31.

El voltaje de alimentación, del gabinete de control de los sistemas con prioridad 9*WAA103B, tienen un valor de:

• A.

42 A 56 VCD

• B.

48 A 56 VCD

• C.

42 A 48 VCD

• D.

40 A 50 VCD

A. 42 A 56 VCD
Explanation
The correct answer is 42 A 56 VCD. This means that the voltage of the power supply for the control cabinet of the systems with priority 9*WAA103B is 56 VCD and the current is 42 A.

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• 32.

Las conexiones de VCD y VCA debe incluir un fusible de ______ para cada inversor

• A.

200A

• B.

400A

• C.

150A

• D.

100A

B. 400A
Explanation
Las conexiones de VCD y VCA deben incluir un fusible de 400A para cada inversor. Esto se debe a que los fusibles se utilizan para proteger los inversores y evitar que se daÃ±en debido a una corriente excesiva. Un fusible de 400A es capaz de soportar una mayor corriente que los fusibles de 200A, 150A o 100A, lo que lo hace mÃ¡s adecuado para proteger los inversores en este caso.

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• 33.

El fusible para la conexion de VCA de respaldo para el inversor de reserva, debe tener una capacidad de

• A.

300 A

• B.

250 A

• C.

200 A

• D.

125 A

D. 125 A
Explanation
The correct answer is 125 A. This is because the fuse for the backup AC connection for the reserve inverter should have a capacity of 125 A.

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• 34.

Los elementos que componen el filtro de entrada de CD y cuya funcion es de limitar la transmision de ruido hacia la bateria son

• A.

L4 C36 y C37

• B.

L4 CR6 y CR7

• C.

L4 CR5 y CR12

• D.

L1 C4 a C15

D. L1 C4 a C15
Explanation
The correct answer is L1 C4 a C15. This is because L1 and C4 to C15 are the elements that make up the input filter of the CD and their function is to limit the transmission of noise to the battery.

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• 35.

Su funcion es la de encender y apagar el inversor cuando se opera a las posiciones encendido y apagado respectivamente

• A.

• B.

Interruptor de limite

• C.

Interruptor de precarga/arranque

• D.

A. Interruptor de entrada de CD
Explanation
The correct answer is "Interruptor de entrada de CD". This is because the given statement mentions that its function is to turn the inverter on and off when operated in the on and off positions respectively. Since the inverter converts DC power to AC power, it makes sense that the switch responsible for controlling the input of DC power would be used to turn the inverter on and off.

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• 36.

Este interruptor enciende y apaga el inversor cuando se opera a las posiciones encendido y apagado

• A.

Selector de transferencia

• B.

• C.

• D.

Corte de alarma

Explanation
The correct answer is "De entrada CD". This is because the sentence states that the switch turns on and off the inverter when operated in the "encendido" (on) and "apagado" (off) positions. "De entrada CD" translates to "DC input", suggesting that the switch controls the power input from a DC source to the inverter.

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• 37.

Este interruptor momentaneo permite la carga de los capacitores del filtro de entrada

• A.

Selector de transferencia

• B.

Precarga / arranque

• C.

• D.

Corte de alarma

B. Precarga / arranque
Explanation
This momentary switch allows for the charging of the input filter capacitors. It is used for preloading or starting the system.

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• 38.

• A.

DS2

• B.

S1

• C.

DS1

• D.

S2

C. DS1
• 39.

Se enciende en caso de que el interruptor de entrada de CD (S1) sea operado a la posicion de apagado (automatica o manualmente)

• A.

Indicador de alarma de falla de salida

• B.

Indicador de alarma de falla de fusible

• C.

Indicador de alarma de falla de inversor

• D.

C. Indicador de alarma de falla de inversor
Explanation
The correct answer is "Indicador de alarma de falla de inversor" because it is the indicator that is activated when the CD input switch (S1) is operated in the off position, either automatically or manually. This indicates a failure in the inverter system.

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• 40.

• A.

Falla de salida

• B.

Falla de fusible

• C.

De transferencia

• D.

Falla de inversor

D. Falla de inversor
Explanation
The correct answer is "Falla de inversor". This means that the alarm indicator will turn on if the CD input switch is operated in the OFF position due to an inverter failure.

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• 41.

ES un indicador amarillo y se ilumina cuando la alarma audible ha sido cortada utilizando el interruptor de CORTE DE ALARMA

• A.

• B.

• C.

• D.

Indicador de alarma de falla de salida

Explanation
The correct answer is "Indicador CA." The given explanation states that the indicator is yellow and lights up when the audible alarm has been cut off using the ALARM CUT switch. This indicates that the indicator is related to the AC (alternating current) power supply. Therefore, the correct answer is "Indicador CA," which translates to "AC Indicator" in English.

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• 42.

El fusible tipo Chase-Shawmut A50P500 cuya capacidad es de 500 amperes, esta designado dentro del inversor WAA103B como

• A.

F1

• B.

F4

• C.

F5

• D.

F3

B. F4
Explanation
The correct answer is F4. The Chase-Shawmut A50P500 fuse, with a capacity of 500 amperes, is designated as F4 within the WAA103B inverter.

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• 43.

El circuito de control y transferencia esta designado dentro del inversor WAA502B como

• A.

A3 (4864-432-00)

• B.

A1 (4873-561-00)

• C.

A2 (4334-323-00)

• D.

A8 (4872-257-00)

A. A3 (4864-432-00)
Explanation
The correct answer is A3 (4864-432-00). This is because the question is asking for the designation of the control and transfer circuit within the WAA502B inverter, and A3 (4864-432-00) is the given designation.

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• 44.

La tarjeta de control y sincronia esta designada dentro del inversor WAA502B como

• A.

A1 (4873-561)

• B.

A2 (4334-323)

• C.

A3 (4864-432)

• D.

A8 (4872-257)

D. A8 (4872-257)
Explanation
The correct answer is A8 (4872-257). This indicates that the control and synchronization card in the WAA502B inverter is designated as A8 with the code 4872-257.

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• 45.

La frecuencia de salida del inversor, ajustada con el potenciometro ___ en la tarjeta de disparo de tiristores A1

• A.

R8

• B.

R9

• C.

R11

• D.

R13

A. R8
Explanation
The correct answer is R8. The question is asking about the potentiometer on the trigger card of the thyristor inverter that adjusts the output frequency. Among the options provided, R8 is the correct choice.

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• 46.

En la tarjeta de disparo de tiristores A1 la frecuencia de salida de inversor es ajustada mediante el potenciometro ____

• A.

R4

• B.

R3

• C.

R8

• D.

R5

C. R8
Explanation
The correct answer is R8. In the firing card of thyristors, the output frequency of the inverter is adjusted using the potentiometer R8.

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• 47.

En la tarjeta de disparo de tiristores A1 el ajuste del apagado por bajo voltaje de entrada, se hace mediante el potenciomentro

• A.

R2

• B.

R5

• C.

R8

• D.

R6

B. R5
Explanation
The correct answer is R5. On the firing card of thyristors A1, the adjustment of the shutdown due to low input voltage is made using potentiometer R5.

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• 48.

En la tarjeta de control de transferencia A3, El ajuste de transferencia, se realiza mediante el potenciometro

• A.

R1

• B.

R2

• C.

R8

• D.

R4

D. R4
Explanation
The correct answer is R4. This is because the sentence states that the transfer adjustment on the A3 transfer control card is done using a potentiometer. Among the options given, only R4 is a potentiometer.

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• 49.

Para que el voltaje de salida del autotransformador este en 220v, el ajuste de voltaje de transferencia debe de tener un valor de:

• A.

198 V

• B.

187 V

• C.

216 V

• D.

200 V

A. 198 V
Explanation
In order for the output voltage of the autotransformer to be 220V, the voltage transfer setting must be adjusted to a value of 198V.

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• 50.

Su funcion es la de generar pulsos de peine dentro del circuito de disparo de tiristores:

• A.

A1(?)

• B.

A8G1

• C.

A5G3

• D.

A9G3

A. A1(?)

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• Current Version
• Mar 22, 2023
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• Jul 06, 2018
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Charly White