ANSI Standard Device Numbers & Acronyms Quiz
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Questions and Answers

What does the suffix '_1' stand for?

  • Positive-Sequence (correct)
  • Negative-Sequence
  • Zero-Sequence
  • None of the above

What does the acronym 'TDO' stand for?

  • Time Delayed Relay Coil Pickup
  • Transformer (High-Voltage Side)
  • Time-Delay Opening Contact (correct)
  • Total Harmonic Distortion

What does the suffix "_1" represent in ANSI Standard Device Numbers?

  • Positive-Sequence (correct)
  • Negative-Sequence
  • Zero-Sequence
  • None of the above

What does the acronym "AFD" stand for in the context of ANSI Standard Device Numbers?

<p>Arc Flash Detector (B)</p> Signup and view all the answers

What does the suffix "TH" represent in the context of ANSI Standard Device Numbers?

<p>Transformer (High-Voltage Side) (C)</p> Signup and view all the answers

The acronym "TDO" stands for "Time Delay Opening Contact" in ANSI Standard Device Numbers.

<p>True (A)</p> Signup and view all the answers

What does the acronym "DDR" stand for in ANSI Standard Device Numbers?

<p>Dynamic Disturbance Recorder (A)</p> Signup and view all the answers

The suffix "_2" represents the negative-sequence component of a three-phase system.

<p>True (A)</p> Signup and view all the answers

Flashcards

ANSI Standard Device Number 1

Represents the master element in a control system.

ANSI Standard Device Number 2

Represents a time delay starting or closing relay.

ANSI Standard Device Number 3

Represents a checking or interlocking relay.

ANSI Standard Device Number 4

Represents a master contactor.

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ANSI Standard Device Number 5

Represents a stopping device.

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ANSI Standard Device Number 6

Represents a starting circuit breaker.

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ANSI Standard Device Number 7

Represents a rate of change relay.

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ANSI Standard Device Number 8

Represents a control power disconnecting device.

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AC

Alternating Current

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DC

Direct Current

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TDO

Time-Delay Opening Contact

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TDPU

Time Delayed Relay Coil Pickup

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AFD

Arc Flash Detector

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CLP

Cold Load Pickup

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HMI

Human-Machine Interface

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RIO

Remote Input/Output Device

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RTU

Remote Terminal Unit/Data Concentrator

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PMU

Phasor Measurement Unit

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50

Instantaneous Overcurrent Relay

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51

Time Overcurrent Relay

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87

Differential Protective Relay

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Position Switch

Indicates equipment position.

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Circuit Breaker

Disconnects electrical circuits safely.

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Master Element

The primary component in a control system that initiates or controls other devices.

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Time Delay Relay

A relay that introduces a time delay in its response to an input signal.

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Checking or Interlocking Relay

A relay that ensures a specific sequence of events occurs or prevents unsafe conditions.

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Master Contactor

A large electrical switch that controls the main power supply to a device.

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Stopping Device

A device that stops or halts the operation of a system.

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Starting Circuit Breaker

A circuit breaker that controls the starting of a device.

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Rate of Change Relay

A relay that responds to changes in a specific parameter, like voltage or current.

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Control Power Disconnecting Device

A device that interrupts the power supply to a control circuit.

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Reversing Device

A device that reverses the direction of a motor or other equipment.

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Unit Sequence Switch

A switch that selects different operating sequences for a system.

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Multifunction Device

A device that combines multiple functions or capabilities.

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Overspeed Device

A device protecting a system from exceeding its maximum speed.

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Synchronous-Speed Device

A device operating at a specific, synchronized speed.

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Underspeed Device

A device protecting a system from operating below its minimum speed.

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Speed or Frequency Matching Device

A device that ensures two systems operate at the same speed or frequency.

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Communication Networking Device

A device that allows communication between different parts of a system.

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Shunting or Discharge Switch

A switch that bypasses or discharges electrical energy.

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Accelerating or Decelerating Device

A device that increases or decreases the speed of a system.

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Motor Starter / Starting-to-Running Transition Contactor

A device that initiates and controls the starting and steady-state operation of a motor.

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Electrically-Operated Valve

A valve that is controlled by an electrical signal.

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Distance Relay

A relay that detects faults based on the distance to the fault location.

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Equalizer Circuit Breaker

A circuit breaker that equalizes the voltage across different parts of a system.

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Temperature Control Device

A device that regulates the temperature of a system.

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Volts-per-Hertz Relay / Overfluxing

A relay that protects a motor from excessive magnetic flux.

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Synchronizing or Synchronism-Check Device

A device that ensures two systems run at the same speed and phase.

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Apparatus Thermal Device

A device that protects equipment from overheating.

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Undervoltage Relay

A relay that trips when the voltage drops below a set level.

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Flame Detector

A device that detects the presence of flames.

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Isolating Contactor

A contactor that switches off a part of a system to isolate it.

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Annunciator Relay

A relay that signals an alarm or indicates a specific condition.

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Separate Excitation Device

A device that provides the electrical field for a motor or generator.

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Directional Power Relay

A relay that determines the direction of power flow.

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Grid Code

A set of rules and regulations governing the operation and management of the Philippine electric grid.

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Grid Management Committee (GMC)

An independent body responsible for overseeing the implementation of the Grid Code, resolving disputes, and ensuring the efficient operation of the grid.

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System Operator

The entity responsible for the real-time operation of the grid, including managing frequency and voltage, scheduling generation, and responding to emergencies.

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Grid Owner

The entity responsible for owning and maintaining the grid's infrastructure, including transmission lines, substations, and transformers.

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Market Operator

The entity responsible for facilitating the wholesale electricity market, including setting prices and managing the flow of energy.

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Frequency

The rate at which alternating current (AC) cycles per second. The Philippine grid standard is 60Hz.

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Voltage Variation

Changes in the level of voltage in the grid from the nominal value.

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Voltage Swell

An increase in voltage above 110% but not exceeding 180% of the nominal voltage, lasting less than one minute.

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Voltage Dip

A decrease in voltage to between 10% and 90% lasting less than one minute.

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Harmonics

Sinusoidal voltages and currents with frequencies that are multiples of the fundamental frequency (60Hz).

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Total Harmonic Distortion (THD)

A measure of the amount of harmonic distortion present in a voltage or current waveform.

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Voltage Unbalance

Unequal voltage levels in the different phases of the power system, leading to inefficient power delivery.

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Flicker

The perceived fluctuation in light intensity caused by voltage fluctuations.

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Transient Voltage Variation

Short-duration, high-frequency overvoltages that typically occur during faults or switching events.

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Power Interruption

A loss of power supply due to a fault, outage, or other interruption in the grid.

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System Loss

The amount of electricity lost in the transmission and distribution system.

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Technical Loss

Loss of electricity due to physical factors like resistance in conductors.

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Non-Technical Loss

Loss of electricity due to theft or metering errors.

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Administrative Loss

The electricity consumed for the operation and maintenance of the grid.

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Leverage Ratio

A financial ratio that measures a company's debt level compared to its assets.

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Liquidity Ratio

A financial ratio that measures a company's ability to meet its short-term financial obligations.

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Financial Efficiency Ratio

A ratio that measures how efficiently a company uses its assets to generate sales and profits.

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Profitability Ratio

A ratio that measures a company's profitability, indicating how much profit it generates from its sales and assets.

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Connection Agreement

A contract outlining the terms and conditions for connecting a generating facility or large customer to the grid.

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Underfrequency Relay

A protective device that automatically sheds load from the grid when the frequency drops below a predetermined level.

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SCADA System

A system for remotely monitoring and controlling the grid's infrastructure and operations.

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Grid Planning

The process of identifying and analyzing future grid needs, including capacity expansions, infrastructure upgrades, and reliability improvements.

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Load Flow Study

An analysis that simulates the flow of electricity through the grid under different load conditions.

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Short Circuit Study

An analysis that determines the fault currents that could flow through the grid during a short circuit.

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Transient Stability Study

An analysis that evaluates the stability of the grid after a major disturbance, like a sudden loss of generation or load.

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Grid Operations

The day-to-day management of the grid, including monitoring, control, and ensuring safe and reliable power delivery.

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Operating Margin

The excess generation capacity available to handle sudden changes in load or unexpected generation outages.

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Contingency Reserve

A reserve of generation capacity available to quickly respond to a sudden loss of generation or transmission capacity.

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Power Quality

The quality of the voltage delivered to consumers, encompassing factors like frequency, voltage variations, and harmonics.

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Study Notes

ANSI Standard Device Numbers & Common Acronyms

  • Suffixes: Used to denote specific types of electrical characteristics. For example, "AC" represents Alternating Current. Other examples include "BL" (Block), "BK" (Brake), "B" (Bus, Battery, or Blower).
  • Acronyms: Represent abbreviations for various devices and functions, like "AFD" (Arc Flash Detector) and "DDR" (Dynamic Disturbance Recorder). Examples include many more, such as "CLP" (Cold Load Pickup), "DDR" (Digital Fault Recorder), "HMI" (Human Machine Interface), and "RTU" (Remote Terminal Unit).
  • Device Numbers: Used to identify specific types of devices within electrical systems. Example numbers include 1, 2, 3, amongst others.

Additional Device Descriptions (Page 2)

  • Various device numbers and their corresponding descriptions, such as type of relay, sensors, breakers, and other related components are listed. For example, devices that deal with checking, interlockeing, and starting circuits exist.

Additional Device Descriptions (Page 3)

  • More devices and their corresponding descriptions are present, with details like relays of different types, circuit breakers, and various other equipment used in electrical systems.

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ANSI Standard Device Numbers & Common Acronyms PDF

Description

Test your knowledge on ANSI standard device numbers and common acronyms used in electrical systems. This quiz covers suffixes, abbreviations, and device types, providing a comprehensive overview of electrical terminology.

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