three phase automatic voltage regulator
... configuration. In the indoor 30A AVR each primary is made up of two coils connected in series. See appendix 1 for the connection diagram. In the outdoor 30A, indoor 50A and outdoor 50A AVRs, the primaries are made up of two coils connected in parallel. The 12A and 20A transformers have single coils. ...
... configuration. In the indoor 30A AVR each primary is made up of two coils connected in series. See appendix 1 for the connection diagram. In the outdoor 30A, indoor 50A and outdoor 50A AVRs, the primaries are made up of two coils connected in parallel. The 12A and 20A transformers have single coils. ...
UETTDRSO15A Operate and monitor system equipment (SCADA)
... • The main use of this scheme is to Isolate both sides of the faulty circuit • This Schemes are used during the following circumstances – A feeder with a weak in feed at one end, insufficient to operate the protection for all faults – Feeder protection applied to transformer –feeder circuits – Fault ...
... • The main use of this scheme is to Isolate both sides of the faulty circuit • This Schemes are used during the following circumstances – A feeder with a weak in feed at one end, insufficient to operate the protection for all faults – Feeder protection applied to transformer –feeder circuits – Fault ...
Branch Circuits and Feeders - Goodheart
... must be greater than the maximum load the circuit will provide. For multiple-load branch circuits, the conductor ampacity must correspond to the rating of the overcurrent protective device. However, for circuits supplying hardwired devices (such as electric heaters, air-conditioning units, and water ...
... must be greater than the maximum load the circuit will provide. For multiple-load branch circuits, the conductor ampacity must correspond to the rating of the overcurrent protective device. However, for circuits supplying hardwired devices (such as electric heaters, air-conditioning units, and water ...
SERIES-PARALLEL DC CIRCUITS
... of each resistor. Note that the supply E2 has been replaced by a short-circuit equivalent. This does not mean that one should place a short-circuit across the terminals of the supply. Simply remove the supply from the network and replace it by a direction to ground, as shown in Fig. 3.2. Keep this i ...
... of each resistor. Note that the supply E2 has been replaced by a short-circuit equivalent. This does not mean that one should place a short-circuit across the terminals of the supply. Simply remove the supply from the network and replace it by a direction to ground, as shown in Fig. 3.2. Keep this i ...
Fault Analysis
... • Negative and zero sequence load, as an admittance • Set on a bus‐basis, with admittance given is total admittance for all loads at that bus ...
... • Negative and zero sequence load, as an admittance • Set on a bus‐basis, with admittance given is total admittance for all loads at that bus ...
GIC Quick Start Guide
... flow, one‐lines and case information displays. PowerWorld on‐line training, including videos and slides, is available at [1]. As is described in [2], GICs are induced in the electric power grid when coronal mass ejections (CMEs) on the sun send charged particles towards the earth. These particl ...
... flow, one‐lines and case information displays. PowerWorld on‐line training, including videos and slides, is available at [1]. As is described in [2], GICs are induced in the electric power grid when coronal mass ejections (CMEs) on the sun send charged particles towards the earth. These particl ...
Sound Reproduction By Wave Field Synthesis
... inside a source-free volume V can be calculated if the pressure field due to the primary sources on the enclosing surface S is known (Section 2.2.1). The loudspeakers are not positioned in a wave front of the imaginary source that is synthesized, so the surface used in the Kirchhoff-Helmholtz integr ...
... inside a source-free volume V can be calculated if the pressure field due to the primary sources on the enclosing surface S is known (Section 2.2.1). The loudspeakers are not positioned in a wave front of the imaginary source that is synthesized, so the surface used in the Kirchhoff-Helmholtz integr ...
Standing wave ratio
In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave's amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line.The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced ""viswar""). For example, the VSWR value 1.2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1.2 times that of the minimum AC voltage along that line. The SWR can as well be defined as the ratio of the maximum amplitude to minimum amplitude of the transmission line's currents, electric field strength, or the magnetic field strength. Neglecting transmission line loss, these ratios are identical.The power standing wave ratio (PSWR) is defined as the square of the VSWR, however this terminology has no physical relation to actual powers involved in transmission.The SWR can be measured with an instrument called an SWR meter. Since SWR is defined relative to the transmission line's characteristic impedance, the SWR meter must be constructed for that impedance; in practice most transmission lines used in these applications are coaxial cables with an impedance of either 50 or 75 ohms. Checking the SWR is a standard procedure in a radio station, for instance, to verify impedance matching of the antenna to the transmission line (and transmitter). Unlike connecting an impedance analyzer (or ""impedance bridge"") directly to the antenna (or other load), the SWR does not measure the actual impedance of the load, but quantifies the magnitude of the impedance mismatch just performing a measurement on the transmitter side of the transmission line.