19:48◄ MessagesHealth and SafetyMr Ali Lilo, AL4510222LTime remaining: 54 QuickQuestainfonds Selectof Health and Safety atWork published by theHSE and is aimed ata) sub-contractorsb) people who aremanaging abusinessc) employeesd) apprentices5G 15Prev Next17Questi18Questi19Questi20Questi21Questi22QuestiSubmit Answers

Option C) employeesExplanation:Essentials of health and safety at Work, published by the HSE, is…

Answered: 19:48 ◄ Messages Health and Safety Mr…

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter17: Commercial And Industrial Air-conditioning Control Systems

Section: Chapter Questions

Problem 6RQ

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Given the center-tap fullwave rectifier circuit shown 220V 60Hz (+2) 220V:Es1-0-Es2 Es1 E$2 D1 D2 RL The transformer is rated 220V:12V-0-12V (Es1=Es2=12V) and the average current through the load RL is 400mA. Determine: (a) Average value, RMS value, and frequency of load voltage VRL. (b) Power dissipated by the load RL. (c) Average current and PIV of each diode.
Q-1: Give brief answer to the following: (Answer Ten only)1) what is the potential transformer used for in power substation?2) what is process leads to lowering the number of free electrons?3) what is The Townsend’s Criterion4) why Sulphur Hexafluorid has good insulation strength?5) What is Intrinsic Breakdown6) why do bubbles lead to breakdown of liquid?7) how to decease the ripple voltage of cockroft-walton voltage multiplier circuit8) how much the maximum charging current of A Van de Graaff generator has a beltwidth 1 m, a belt speed of 4 m/s, and charge density of 10 c/m29) Why does need for Reactive Power Compensation in test transformer?10) The output voltage of series resonant circuit is given by the formula _________11) what is impulse voltage and what is its standard wave shape?12) Which advice can measure impulse voltage?
Identify the power system component represented by the given symbol. BE O potential transformer O Circuit breaker O Lightning arrester O current transformer
Reconsider Problem 3.29. If Va,VbandVc are a negative-sequence set, how would the voltage and current relationships change? (a) If C1 is the complex positive-sequence voltage gain in Problem 3.29 and (b) if C2 is the negative sequence complex voltage gain, express the relationship between C1andC2
With base MVA of 150 and base voltage of 33. If the reactance of the transformer is 0.23 pu. The parameter of the reactance of the transformer in the Neplan software is O 1.66 2.30 23 0.23 O Non of them
Direction. Answer each problem and show your solutions cleanly and clearly. Draw circuit diagrams. Practice Problem 1.1 Design a transformer to step-down the voltage from 240 to 12 Volts. If 360 turns are used in the primary, how many turns are required on the secondary? Ans: N = 18 turns
A transformer with a central tap was purchased that provides a voltage of 11Vac between the central tap and either of its ends. We want to make a regulated voltage source that is ± 12Vdc ... is it possible to make the source with the transformer you bought or need to go change it? What would you recommend?What are the minimum components that you must buy to make the voltage source? Just provide your view please
What is an autotransformer?
1. The power transformer that used to steps the voltage down from transmission levels to distribution levels is called: A) Substation transformer C) Distribution transformer B) Unit transformer D) Potential transformer. 2. The primary and secondary windings of an ideal transformer have power factor. A) Higher. B) Much lower. D) Lower. C) Same. 3. Volt-amperes reactive (VAR) is the unit that used to measure the A) Active power. B) Reactive power. C) Real power. D) Apparent power. 4. The portion of the flux that goes through one of the transformer coils but not the other one is called. A) Average flux B) Mutual flux C) Total flux D) Leakage flux 5. The fundamental component of the magnetization current the voltage applied to the core by 90°: A) Lags, 45°. B) Leads, 45°. C) Lags, 90°. D). Leads, 90°. 6. The ---- are resistive heating losses in the core of the transformer. A) Hysteresis losses. B) Copper losses. C) Leakage flux losses. D) Eddy current losses. 7. The total rotational losses…
Combination circuit what is PT? RT? IT? Voltage Across each load?
1. Outline/Give Two examples for job factors that could lead to poor/bad health and safety behaviour in the workplace? 2. Give thegning limit FB 3. Me 0 4. Before repair work or maintenance of electrical equipment and devices is started, WHAT steps are necessary to undertake to have maximum electrical safety? 5. What power tool is most likely to cause a burn hazard? END Scanned by Candcase
Choose the portective device which can handles short circuits lesser time than Reclosers. O a. Potential Transformer O b. Current Transformer O c. Circuit Breakers O d. Fuse

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