Ingeniero

CONTROL SYSTEMS
1. In various communication protocols for substations is used a device called Gateway. What is their
function? (Only ONE answer)
a) Communicate the control center with the house control in the substation.
b) Visualize the objects that have the substation.
c) Execute programs of memory that can make check the current in a specific time.
d) Change the normal operation insubstation.
2. IEC (International Electrotechnical Commission) standard 61850 defines some parameters to design
control systems in substations, but the main idea of this standard is to provide guidance on: (Only ONE
answer)
a) Programmable controllers
b) Communication networks and systems
c) Stabilized power supplies DC
d) Optical fiber cables
3. Which of these control elements must have aconventional substation? (DOUBLE answer)
a) Capacitors and local Machines
b) Communication by RTU (Remote Terminal Unit) and wired control
c) Optical fiber cables and RTU (Remote Terminal Unit)
d) Elements of high voltage and auxiliary services
4. A problem in substations control systems is electromagnetic interference, which of these are probable
causes? (DOUBLE answer)
a) An electronic devicethat send a wrong signal to control devices..
b) Short circuit current in the system.
c) When the load resistance is zero, all the power is consumed by control devices.
d) High frequency fields by atmospheric discharges or substation elements.
5. Which of these is a characteristic of SCADA system, related to substations? (Only ONE answer)
a) SCADA systems must support many equipment types toavoid incompatibility problems.
b) SCADA is a software that can execute some tasks to operation and maneuver of systems, besides
create stops alarms.
c) SCADA detects current flow and line voltage in electrical systems, water flow and pipe pressure in
water systems.
d) SCADA is an employee staff that monitorizing the entire system by mean of a LED display.
6. The transition between zero andany communication level in a SAS (Substation Automation System)
or conventional system is through of: (Only ONE answer)
a) Control wired and communication interface function.
b) Protocol by-pass.
c) The RTUs (Remote Terminal Unit) link the sensors to the master.
d) Using messages from the supervisory system to control connected objects.

7. SAS (Substation Automation System) is based inuse of IED’s (Intelligent Electronics Devices).
Which of these are the common means of communication used between different IED’s? (Only ONE
answer)
a) Programmable automation controller (PAC) with digital protective relays.
b) Grouping parallel control
c) Optical fiber cables and twisted wires
d) GPS with data multifunction
8. Which of these specifications must be taken into account forwired control systems design?
(DOUBLE answer)
a) Using electro-optical converters and cables twisted configuration.
b) Design in parallel routes control cables with those of high tension.
c) Use shielded cables grounded at both ends of the control.
d) Multiconductor carry the same current and voltage leads, low and high frequency.
9. What is the correct definition of SCADA? (Only ONE answer)a) Supervisory Computer And Data Accesory
b) Supervisory Control And Data Acquisition
c) Service Control And Diverse Acquisition
d) Supervisory Countable And Data Adaptable
10. Which is the function of third control level in an automated substation? (Only ONE answer)
a) Interface maneuver
b) Level processing
c) Remote System Information
d) Single-point controller
11. What kind ofinformation can get In a data acquisition station located in the yard of the substation?
(Only ONE answer)
a) State of the parameters of the system.
b) Voltages and currents in the system and gas level switches.
c) Control, supervision, interlockings.
d) Voltage regulation and protection.
12. What information can be shown in the HMI (Human Machine Interface)? (Only ONE answer)
a) A schematic...