main function of an interposing current transformer is to balance the
currents supplied to the relay where there would otherwise be an
imbalance due to the ratios of the main current transformers.
Interposing current transformer are equipped with a wide range of taps
that can be selected by the user to achieve the balance required.
Query:What are Motor Generator Sets and explain the different ways the motor generator set can be used ?
Generator Sets are a combination of an electrical generator and an
engine mounted together to form a single piece of equipment. Motor
generator set is also referred to as a genset, or more commonly, a
generatorThe motor generator set can used in the following different
2.DC to AC
3.DC at one voltage to DC at another voltage
4.AC at one frequency to AC at another harmonically-related frequency
Query:What is power quality meter ?
Resolution:Power Quality meters are common in many
industrial environment. Small units are now available for home use as
well. They give operators the ability to monitor the both perturbations
on the power supply, as well as power used within a building, or by a
single machine or appliance. In some situations, equipment function and
operation is monitored and controlled from a remote location where
communication is via modem, or high-speed communication lines.So we can
understand the importance of power measurement through power quality
meters.Query:What is the different between digital phase converter and ordinary phase converter?
Resolution:Digital phase converter are a recent
development in phase converter technology that utilizes proprietary
software in a powerful microprocessor to control solid state power
switching components. This microprocessor, called a digital signal
processor (DSP), monitors the phase conversion process, continually
adjusting the input and output modules of the converter to maintain
perfectly balanced three-phase power under all load conditions.
Query:Explain the operation of variable frequency transformer?
Resolution:A variable frequency transformer is used to
transmit electricity between two asynchronous alternating current
domains. A variable frequency transformer is a doubly-fed electric
machine resembling a vertical shaft hydroelectric generator with a
three-phase wound rotor, connected by slip rings to one external ac
power circuit. A direct-current torque motor is mounted on the same
shaft. Changing the direction of torque applied to the shaft changes the
direction of power flow; with no applied torque, the shaft rotates due
to the difference in frequency between the networks connected to the
rotor and stator.The variable frequency transformer behaves as a
continuously adjustable phase-shifting transformer. It allows control of
the power flow between two networks .
Query:What is the main use of rotary phase converter ?
Resolution:Rotary phase converter will be converting
single phase power into true balanced 3 phase power,so it is often
called as single phase to three phase converter .Often the advantages of
3 phase motors, and other 3 phase equipment, make it worthwhile to
convert single phase to 3 phase so that small and large consumers need
not want to pay for the extra cost of a 3 phase service but may still
wish to use 3 phase equipment.