The harmonic content of the motor air gap or internal voltages e A, e B and e C is a function of the rotor magnets and stator winding configurations . This Indian Standard was adopted by the Bureau of Indian Standards on 25 January 1989, after the draft finalized by the Low Voltage Switchgear and Controlgear Sectional Committee had been approved by the Electrotechnical Division Council. Glossary - All Terms and Definitions Listed Alphabetically ... This capability depends on all internal connections of the film capacitor withstanding the peak current loads up to the maximum specified temperature. Film capacitor This capability depends on all internal connections of the film capacitor withstanding the peak current loads up to the maximum specified temperature. The temperature measured on the die of the temperature-measuring integrated circuit. A DMM (digital multimeter), such as this Keithley DMM7510 from Tektronix, is a must-have instrument for motor testing. Internal structure to increase surge ratings. ... mechanical parts due to the effect of external or internal forces on that parts. Oxide films and scale are formed on metal surface at high temperature causing corrosion such as rusting of ferrous alloys. the temperature of the air (dry and wet bulb) or other liquid being circulated through the evaporator or the cooling coil. the volume of the cooled liquid being circulated. Bonding of the windings is followed by epoxy encapsulation into the case, resulting in superior moisture and humidity resistance, as well as the capability to take substantial shock loads and high vibration levels in all axes. Measuring Parameters and Vibration Severity Criteria 2 . Sonar (sound navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (), communicate with or detect objects on or under the surface of the water, such as other vessels. 2. 6. 4. Mix the right quantity of resin and hardener. Record, temperature correct and trend Further decreasing temperature, decreases movement, and energy undergoes freeing in a solid. Insulation resistance is commonly measured in megohms, (MΩ). 3.1 All parts should be cleaned and baked dry to remove all dirt and contamination. Modern DC motors are nearly always operated in conjunction with … 60 months: Insulation resistance: Overhaul and post overhaul: Perform IR check between motor leads and ground. 3.9.5 Factors influencing the rate of corrosion. 3.9.5 Factors influencing the rate of corrosion. LVDTs are a type of two-part inductive sensor in which a ferromagnetic armature moves within an outer transformer consisting of one primary and two secondary coils. Oxide films and scale are formed on metal surface at high temperature causing corrosion such as rusting of ferrous alloys. Cut several pieces of woven roving glass 270/100 with equal length. Mix the right quantity of resin and hardener. DOE defines a “submersible electric motor” as an electric motor that: (1) Is intended to operate continuously only while submerged in liquid; (2) is capable of operation while submerged in liquid for an indefinite period of time; and (3) has been sealed to prevent ingress of liquid from contacting the motor's internal parts. Modern DC motors are nearly always operated in conjunction with … Enter the email address you signed up with and we'll email you a reset link. Measuring electrical characteristics like impedance, inductance and capacitance tell the analyst plenty about the condition of the windings. The intermediate layer is adapted to allow fluid to flow through it. Local Temperature Sensor: An element or function of an integrated circuit that measures its own die temperature. Increasing temperature even more causes energy to increase more movement of particles, and further aprt into a gaseous state, called vaporizing. 3.1 Other terms used have the meanings ascribed to them in IEC 60076-1 or in IEC 60050(421). Insulation resistance is commonly measured in megohms, (MΩ). A proximity probe determines vibration data of the shaft based on a reference point, while a shaft stick involves placing a handheld accelerometer attached to a rod against the rotating surface of the shaft. Grind the above area to remove the internal liner of the pipe. Indian Standard CODE OF PRACTICE FOR ELECTRICAL WIRING INSTALLATIONS (Third Revision)0. Cut several pieces of woven roving glass 270/100 with equal length. ... Methods for sa ving computer time are thus be used. LOL: Loss of lock: Long Haul: A network that spans distances larger than a local area network (LAN). The first uses an accelerometer, and the latter uses a proximity probe or shaft stick. 60 months: Insulation resistance: Overhaul and post overhaul: Perform IR check between motor leads and ground. Further decreasing temperature, decreases movement, and energy undergoes freeing in a solid. High temperature corrosion is known as oxidation and is a dry corrosion. Motor efficiency is the most important factor to consider in the development of implantable devices such as ventricular assist devices (VADs) and total artificial hearts (TAHs). The seat also includes a temperature-control system associated with at least one of the seating portion and the backrest portion. the volume of the cooled liquid being circulated. Other terms used have the meanings ascribed to them in IEC 60076-1 or in IEC 60050(421). Both use different measuring tools. 3. Cut several pieces of woven roving glass 270/100 with equal length. This determines condition of the ground insulation. If the temperature of the cooled liquid entering the evaporator is varied, the refrigerating effect is also varied. the temperature of the air (dry and wet bulb) or other liquid being circulated through the evaporator or the cooling coil. FOREWORD 0.1. Forms of internal separation (if required) Presence of “live” warning labels. The reset temperature is not precisely specified but the automatic thermal overload switch will reset after the motor cools down. Electrical Engineering MCQs Need help preparing for your exams? It should be stated, that variations in insulation resistance can be caused by numerous factors including: design, temperature, dryness, and cleanliness of parts, especially of bushings. Enter the email address you signed up with and we'll email you a reset link. Fabricated parts required: Plywood base 2x Y-Rail 2x Y-Rail Angle 4x Belt Clamps Hardware required: 8x 8-32 x ½ machine screw 6x 8-32 x 1 ¼ machine screw 28x #8 washer 14x 8-32 nut 8x 1” ¼” dia hex bolt 8x ¼” cross nut 25x ¼” x 11mm threaded insert The base is the foundation of the machine and must provide a flat and stable support to mount the work piece and support the … DOE defines a “submersible electric motor” as an electric motor that: (1) Is intended to operate continuously only while submerged in liquid; (2) is capable of operation while submerged in liquid for an indefinite period of time; and (3) has been sealed to prevent ingress of liquid from contacting the motor's internal parts. When insulation resistance falls below specified value, it can often be brought back to the required value by … Megohmmeters produce high voltages via battery powered internal circuitry or a manually operated generator with outputs ranging from 250 to 15,000 volts. Dealing with general equipment requirements, gas detectors, intrinsically safe equipment, a variety of different methods of equipment protection, and moving on to the … If the temperature of the cooled liquid entering the evaporator is varied, the refrigerating effect is also varied. ... mechanical parts due to the effect of external or internal forces on that parts. The excess energy is dissipated as heat into the surrounding tissue and blood. 3. 3 4. ... Methods for sa ving computer time are thus be used. 7. 5. MCQs in all electrical engineering subjects including analog and digital communications, control systems, power electronics, electric circuits, electric machines – and … 3.3.2 Protection against indirect contact. It helps to maintain the internal temperature of the transformer and is important for the safe operation. Both use different measuring tools. ... mechanical parts due to the effect of external or internal forces on that parts. 4. Enter the email address you signed up with and we'll email you a reset link. Both use different measuring tools. The harmonic content of the motor air gap or internal voltages e A, e B and e C is a function of the rotor magnets and stator winding configurations . DOE defines a “submersible electric motor” as an electric motor that: (1) Is intended to operate continuously only while submerged in liquid; (2) is capable of operation while submerged in liquid for an indefinite period of time; and (3) has been sealed to prevent ingress of liquid from contacting the motor's internal parts. Measuring electrical characteristics like impedance, inductance and capacitance tell the analyst plenty about the condition of the windings. Measuring Parameters and Vibration Severity Criteria 2 . Inductance is a great indicator of turn-to-turn shorts. 60 months: Insulation resistance: Overhaul and post overhaul: Perform IR check between motor leads and ground. 3.9.4 High temperature corrosion. A text book of Basic Electrical Engineering-VK Mehta. Electrical Engineering MCQs Need help preparing for your exams? Increasing temperature even more causes energy to increase more movement of particles, and further aprt into a gaseous state, called vaporizing. A proximity probe determines vibration data of the shaft based on a reference point, while a shaft stick involves placing a handheld accelerometer attached to a rod against the rotating surface of the shaft. The International Electrotechnical Commission (IEC) 60079 series of explosive atmosphere standards covers a wide array of important considerations when it comes to potentially explosive atmospheres. It should be stated, that variations in insulation resistance can be caused by numerous factors including: design, temperature, dryness, and cleanliness of parts, especially of bushings. 3 4. Measuring Parameters and Vibration Severity Criteria 2 . This Indian Standard was adopted by the Bureau of Indian Standards on 25 January 1989, after the draft finalized by the Low Voltage Switchgear and Controlgear Sectional Committee had been approved by the Electrotechnical Division Council. An important property of film capacitors is their ability to withstand high peak voltage or peak current surge pulses. Adams, in Sensor Technologies for Civil Infrastructures, 2014 Linear variable differential transformers. And the internal high-permeability magnetic shield minimizes the effects of external AC fields. A DC motor is an electric motor that runs on direct current (DC) electricity.DC motors were used to run machinery, often eliminating the need for a local steam engine or internal combustion engine.DC motors can operate directly from rechargeable batteries, providing the motive power for the first electric vehicles. LVDTs are a type of two-part inductive sensor in which a ferromagnetic armature moves within an outer transformer consisting of one primary and two secondary coils. It helps to maintain the internal temperature of the transformer and is important for the safe operation. Wet the surface area of internal layer with mixture. Electrical Engineering MCQs Need help preparing for your exams? The intermediate layer is adapted to allow fluid to flow through it. Capacitance to ground measures the amount of winding contamination (water, dirt, dust, etc. Record, temperature correct and trend We have over 5000 electrical and electronics engineering multiple choice questions (MCQs) and answers – with hints for each question. 3.3.2 Protection against indirect contact. An important property of film capacitors is their ability to withstand high peak voltage or peak current surge pulses. The windings should be reinsulated as appropriate. The first uses an accelerometer, and the latter uses a proximity probe or shaft stick. 2. Increasing temperature even more causes energy to increase more movement of particles, and further aprt into a gaseous state, called vaporizing. 3 4. The excess energy is dissipated as heat into the surrounding tissue and blood. If the temperature of the cooled liquid entering the evaporator is varied, the refrigerating effect is also varied. The excess energy is dissipated as heat into the surrounding tissue and blood. Fabricated parts required: Plywood base 2x Y-Rail 2x Y-Rail Angle 4x Belt Clamps Hardware required: 8x 8-32 x ½ machine screw 6x 8-32 x 1 ¼ machine screw 28x #8 washer 14x 8-32 nut 8x 1” ¼” dia hex bolt 8x ¼” cross nut 25x ¼” x 11mm threaded insert The base is the foundation of the machine and must provide a flat and stable support to mount the work piece and support the … The windings should be reinsulated as appropriate. All parts should be cleaned and baked dry to remove all dirt and contamination. CISPR 16-1:1993, Specification for radio disturbance and immunity measuring apparatus and methods - Part 1: Radio disturbance and immunity measuring apparatus 3 Definitions For the purpose of this part of IEC 60076, the following definitions apply. The electric energy that is input into the device is converted to mechanical energy by the motor. Mix the right quantity of resin and hardener. Wet the surface area of internal layer with mixture. And the internal high-permeability magnetic shield minimizes the effects of external AC fields. A DMM (digital multimeter), such as this Keithley DMM7510 from Tektronix, is a must-have instrument for motor testing. the volume of the cooled liquid being circulated. 4. Vice versa, by decreasing temperature, energy drops, movement drops, and condense back into a liquid. ). A DC motor is an electric motor that runs on direct current (DC) electricity.DC motors were used to run machinery, often eliminating the need for a local steam engine or internal combustion engine.DC motors can operate directly from rechargeable batteries, providing the motive power for the first electric vehicles. Forms of internal separation (if required) Presence of “live” warning labels. 5. A wide range of DMMs are available to measure voltage, current, and resistance, depending on the motor power ratings. A wide range of DMMs are available to measure voltage, current, and resistance, depending on the motor power ratings. The seat also includes a temperature-control system associated with at least one of the seating portion and the backrest portion. Vice versa, by decreasing temperature, energy drops, movement drops, and condense back into a liquid. Two types of technology share the name "sonar": passive sonar is essentially listening for the sound made … 7. Dealing with general equipment requirements, gas detectors, intrinsically safe equipment, a variety of different methods of equipment protection, and moving on to the … The temperature measured on the die of the temperature-measuring integrated circuit. CISPR 16-1:1993, Specification for radio disturbance and immunity measuring apparatus and methods - Part 1: Radio disturbance and immunity measuring apparatus 3 Definitions For the purpose of this part of IEC 60076, the following definitions apply. FOREWORD 0.1. The reset temperature is not precisely specified but the automatic thermal overload switch will reset after the motor cools down. The electric energy that is input into the device is converted to mechanical energy by the motor. Grind the above area to remove the internal liner of the pipe. It should be stated, that variations in insulation resistance can be caused by numerous factors including: design, temperature, dryness, and cleanliness of parts, especially of bushings. N.C. Yoder, D.E. The electric energy that is input into the device is converted to mechanical energy by the motor. Local Temperature Sensor: An element or function of an integrated circuit that measures its own die temperature. Stack several pieces of woven roving on a flat surface and impregnate with the resin mixture. A proximity probe determines vibration data of the shaft based on a reference point, while a shaft stick involves placing a handheld accelerometer attached to a rod against the rotating surface of the shaft. The temperature-control system includes a base layer and an intermediate layer disposed adjacent to the base layer. We have over 5000 electrical and electronics engineering multiple choice questions (MCQs) and answers – with hints for each question. 3.9.5 Factors influencing the rate of corrosion. 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