A strip chart recorder is a type of analog-graphical recorder which records the variation of one or more variables with respect to time on a chart (graph paper) moving at a constant speed.
What is Magnetic Recorder? Working & Diagram
Magnetic recorders are the type of analog recorders in which the data is recorded on a thin magnetic tape or wire. A magnetic recorder records the signals of high frequency and reproduces the recorded data in electrical form. The data that is recorded through magnetic recorder can be replayed or reproduced any number of times whenever required.
What is Single Acting Hydraulic Cylinder? Construction, Diagram, Working & Applications
Single acting hydraulic cylinder is a type of hydraulic cylinder which provides the working force only in single direction. It consists of a piston which moves in a cylinder barrel and a piston rod is connected at one end. When the fluid is supplied into the cylinder through pressure port provided at piston side, piston moves towards left or forward as shown in figure 1. Thereby performing work, then piston returns by spring force provided at piston rod. Single acting hydraulic cylinders are used to perform various operations such as braking, locking, clamping, etc.
What is Telescopic Cylinder? Construction, Diagram, Working & Applications
Telescopic Cylinder is a special type of hydraulic cylinder. It is used in applications where long extension strokes and small return strokes are required. Extension of this cylinder takes place in stages and every individual is provided with a stage sleeve which is fitted inside the previous stage.
What is Pressure Reducing Valve? Construction, Diagram, Working & Applications
Pressure Reducing Valve is a type of pressure control valve, used to reduce the pressure at particular locations of the system. It is generally used in the hydraulic systems where the low pressures are required. This valve is actuated by down stream or outlet pressure, and is closed when this pressure reaches the valve setting pressure.
What is Counterbalance Valve? Construction, Diagram & Working
Counterbalance valves are used to maintain the back pressure on a vertical cylinder to prevent the load from falling due to gravity.
What is an Electrical Load? Explanation, Types & Importance
The electrical load may be defined as the consumption of active and reactive power by an electrical appliance to utilize it for giving the required output from the appliance. It may also be the active and reactive power consumed by all the electrical appliances connected to particular premises such that the electrical appliances produce the desired output. They may be single-phase or three-phase, domestic and commercial types.
Transposition of Conductors | Transposition of Transmission Line
Interchanging the positions of conductors at regular intervals along the line so that each conductor occupies another conductor's position at an equal distance is known as Transposition of Transmission Line.
When in case of an overhead transmission line, all the three phases are supposed to be spaced symmetrically keeping the line constants, identical but due to some mechanical considerations it in not so, these are placed irregularly. It disturbs the line constants, as a result the voltage drop in the three lines will be different and unequal line voltage is achieved at the receiving end.
What is an Under Frequency Relay? Working, Diagram & Construction
The relay which operates based on the frequency and produces a tripping signal when the magnitude of frequency drops below a predetermined value is known as under frequency relay. Under frequency relays are either electromagnetic type or static type.
Class D Commutation of Thyristor | Impulse commutation | Auxiliary Voltage Commutation
The auxiliary voltage commutation is also called as “Impulse commutation”, or class D commutation. The circuit diagram for class D type commutation is as shown in Fig. 1(a). SCR1 is the main load carrying SCR whereas SCR2 is an auxiliary SCR which is turned on to turn off the main SCR. Auxiliary SCR is a low-power device. The auxiliary SCR, i.e. SCR2 is turned on first in order to charge the commutating capacitor C with the polarities as shown in Fig. 1(b). As soon as C is charged, SCR2 will turn off due to a lack of current. Thus SCR2 gets commutated naturally. This positive voltage will then be held on the commutating capacitor, as there is no discharge path for it.