Direct current

Electrical Properties AC Conductivity, Ac Resistivity, Dielectric loss, and Dielectric constant are electrical properties and measured as a function of frequency. AC Conductivity and Resistivity AC resistance (ρac) was recorded by LCR meter model 4275 in the frequency range 1MHz to 3GHz. AC conductivity was determined by using the value of Ac resistance. As we know, Ac Conductivity is reciprocal of Ac resistance can be calculated by the relation; ac =1/ρac (6) The variation of AC…

Fig. 3. Schematic Diagram of Power Line Guardians (“PLG”) PLGs are also used to give the real-time data on the lines such as: line current, conductor temperature, frequency, sag [17]-[21]. Fig. 4. The PLG communications system. The diagram (Fig.4) shows the PLG communications system. PLGs (blue) control the power flows on the lines. Super PLGs (red) can control both the power flows and the PLGs. These Super PLGs are also used to communicate with Energy Management Systems (EMS) and allow…

Feed Forward Control model in Simulink To implement feed forward control. Firstly, the transfer function of the linear DC Motor model has to be obtained. Actually in our case, the input of the plant is current so the transfer function of the mathematical model in ratio of angular velocity to current has to be obtained. It is given by: G(s)=Ω_1/I_a =R_A/K_M 1/(T_e s+1) where T_e=(J_meq R_A)/(K_m Cϕ) is electro-mechanical time constant. The feed forward control could be determined using…

the Avo 8, possible reasons for varience include a parallax error (not looking at the reading from directly above the meter), a reading error due to less divisions when measuring resistance, or the device not being properly zeroed. When measuring current, there are also fewer division, parallax is still a potential issue, and finally, incorrect zeroing of the meter. Voltage has an additional error, the loading of the meter itself. Alongside this issue, there is also parallax, zero, and…

circuit the internal resistance of a DC source should be equal to zero for maximum power transfer to the load resistance. The derivation of the maximum power transfer theorem for resistive and non-linear impedance AC circuits. I – Phasor current (ωL or-1/ωC)_L and (ωL or-1/ωC)_r= X_L and X_r respectively I = (E_rms∠0°)/(Z+Z_r ) = (E_rms∠0°)/(r+R_L+j(X_r+X_L)) P_L= |I|^2 R_L =R_L/(〖(r+R_L)〗^2+〖(X+X_L)〗^2 ) 〖E_rms〗^2 2.1) The maximum power transfer when we have the choice to…

1762-IF4 is an Allen Bradley MicroLogix 1200 System with 4 Channel Current/Voltage Analog Input Module. It has a dimension of 90 x 87 x 40.4 mm. It has Delta-Sigma converter and 4 differential (bipolar) inputs. It’s analog operating voltage range is -10 – 10 V DC normal and -10.5 – 10.5 V DC full scale. It’s analog operating current range is 4 – 20 mA normal and -21 – 21 mA full scale. It converts the analog input up to the full-scale range. It enhances the functionality of MicroLogix 1200…

2.5PRODUCTS AND SERVICES PROFILE The products and services of L&T’s Electrical & Automation are:  RELAYS Larsen & Toubro offers a wide range of Protection, Control & Monitoring Relays. These are Numerical relays suitable for Low Voltage & Medium Voltage power distribution system. These are manufactured at L&T’s Mysore Works equipped with modern infrastructure and employing latest testing equipment.  SWITCHGEAR PRODUCTS Larsen & Toubro Limited is among the major manufacturers of low voltage…

In essence, Tesla coils are a high-voltage, resonant transformer circuits. They consist of the six major components (Behrend 1), namely: Primary transformer Tank capacitor Spark gap Primary coil Secondary coil Toroid Figure 1: Tesla coil (diagram) A primary transformer is a step-up transformer that takes the line voltage of the AC source and steps it up to a range between 12 kV and 50 kV at 60 Hz (Johnson 4). The efficiency of this transformer is largely dependable on the construction…

Damping to Solar Irradiation When solar irradiation increases, the PV array would equip the PV inverter with more voltage.The output current of the PV inverter should be increased to acquire more power from the PV array. To relieve the tracking error for the high-irradiation case, a high value of χ compared to Test 1 should be taken up. The best method to decrease the current deviation is to alter χ to decline the control gains to adapt PV inverter to the changed solar irradiation. The…

Vibration Analysis of a Centrifugal Pump A.Naveen Varma1, K. Bala Bhaskar1, B. Sai Kumar1, G.Giridhar1, Vamsi Raja2, P.Phani Prasanthi3 1Research Scholars 1Department of Mechanical Engineering, P.V.S.I.T. Kanuru (A.P), India-520007 2Associate Manager, Kirloskar Brothers Limited, Pune, India. 3Assistant Professor 3Department of Mechanical Engineering, P.V.S.I.T. Kanuru (A.P), India-520007. ABSTRACT: Centrifugal pumps are among the more versatile and widely used products of rotating mechanical…