Field rheostats having sufficient resistance to reduce the voltage the proper amount must be used with voltage regulator installations.
Therefore, feeder regulation by means of rheostats is practically the same in the case of alternating current as in that of direct current.
It may seem unnecessary to employ a rheostat in each of two separate field circuits to regulate the voltage of the alternator, but these rheostats are not both used to produce the same result.
Full secondary voltage is applied, and rheostats or auxiliary auto-transformers are inserted in the circuit to properly regulate the voltage.
A and A' are the armatures of the two machines, the fields of which are partly separately excited, the amount of excitation current being controlled by the series compounding rheostats B and B', which form a stationary shunt.
The type of resistance used in motor starting rheostats of small size consists usually of tinned iron wire wound on asbestos tubes, as shown in fig.
Cutler-Hammer motor starting rheostats with no voltage and overload release.
Rheostats embodying these methods are known as compound speed regulators, one form being shown in fig.
Motor starting rheostats or "starting boxes," are designed to start a motor and bring it gradually from rest to full speed.
Button contacts are usually furnished with motor starting rheostats of small size while contact segments are used on those of greater capacity.
These regulators may operate rheostats that are in series with the magnet windings of the generators to be regulated, and raise or lower the generator voltage by varying the exciting current in these windings.
The switches which open and close the power circuits through motors and rheostats are called contactors, each comprising a magnetic blow-out switch and the electro magnet which controls the movements of the switch.
The switches most essential are those for opening and closing the motor and the generator circuits of the charging sets and with these usually are associated the starting rheostats of the motors and the field rheostats of the generators.
The starting rheostats are adapted to allow resistance to be removed from the motor armature circuit, allowing the armature to gain speed and increase its counter-electromotive force without overheating.
Rheostats must be plainly marked with their rated capacity in volts and amperes, and, if mounted on a standard, must be raised to a height of at least three inches above the floor.
As a rule much light is wasted on small pictures because the apparatus is at hand to deliver it; with large pictures, the illumination is often poor because transformers and rheostats are seldom fitted to deliver more than 60 amperes.
For solderless lugs, such as are used onrheostats or for arc lamps, see "Portable Stage Equipment.
In motor-starting rheostats for alternating-current circuits the automatic interrupting device may be omitted.
Overload-release devices on motor-starting rheostats will not be considered to take the place of the cutout required to protect the motor and the rheostat.
There are productions in which it is necessary to place the arc lamps and their rheostats directly in the way of flying paper used to make "snow".
Overload-release devices on motor-starting rheostats will not be considered to take the place of the cut-out required by this section.
For the connections to the arc lamp and rheostats it is not practicable to use soldered lugs because no solder will stand the heat.
It is arranged so that the operator can move all the rheostats at once, if desired, thus producing a gradual brightening or dimming of the lights.
Any degree of brightness may be obtained by manipulating therheostats on the switchboard.
The annular table carries the rheostats by which the light is regulated, according to the effects to be produced with iris diaphragms, which permit of obtaining vanishing effects and night, sunrise, or sunset effects.
Which is the word, which the gesture, that, springing directly from the depths of one character, penetrates to the depths of another?
His vision was more uncertain and so his faith was weaker.
It was just what the books left out that Ibsen wanted to express.
To get both connections at the same time, rheostats for shunt motors are arranged as shown in fig.
Rheostats designed to be used in starting electric motors are frequently called "starting boxes.
Overload release devices on motor starting rheostats will not be considered to take the place of the cut out required if they be inoperative during the starting of the motor.
In this case rheostats must not be used for dimming the light because of the attendant changes in color or quality of the light.
These rheostats are very seldom in use when the car is in motion, because it is a waste of power to pass the current through them.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "rheostats" in a variety of sentences. We hope that you will now be able to make sentences using this word.
