Download electric energy

Tutorial: Mechanic - electrician
Topic:
Basics of electrical engineering
the 2nd. year, Three-phase current
Appliances, connection
Prepared by: Škarka Miloš
Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002
je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
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Appliance is an electro technical device
altering (consuming) electric energy into a
different kind of energy.
Electrical appliance along with a source of
electric energy is the most important part of
electric circuit.
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Important parameters of electric appliances
are voltage, which they have to be connected
to, and electric input determining how much
electric energy the appliance consumes in
one time unit (1 s).
Label of electromotor
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Safety parameters (safety regulations) in
electric devices serve for preventing injuries
caused by electric current. That‘s why
producers of electric appliances (and
distributors) has to perform basic tests before
they launch their products on the market
(according to ČSN 34 5610, ČSN 34 5611, …)
and also gain certificate from authorized
testing lab EZÚ Praha (Elektrotechnický
zkušební ústav).
One-phase
– work on phase voltage 230V,
vacuum cleaner, microwave, hairdryer, TV
Two-phase-
work on comprehensive voltage
400v or 2x 230V
cook top, welder, appliances with higher input
Three-phase- work on voltage 3x230/3x400V
motors, convector heaters, cook tops, water
boilers
A socket is an electro technical part serving for
connecting electrical appliances to electric
distribution network. The socket is the
immovable part of the socket connection. The
counterpart to the socket is the plug.
Socket connection: left tube L, right N, pin PE
(pin on the top).
Plug and socket Schuko
Standard socket for Europe
Plug with protective contact
Serves for connecting three-phase appliances.
In the TNC network we use four-pin –PEN + L1, L2,
L3
In the TNC-S and TNS network we use five-pin
socket
PE+N+L1, L2, L3
TNC network plug
Electric sockets in motion
Sockets of all countries, unite!
Let‘s go to
USA
Type A
Can be used for example : USA, CANADA, VIETNAM…
Let‘s go to Cuba
Type B
Protective PE
Phase
Neutral
Similar to type A with clearly put pin
Can be used for example : USA , CANADA, TAHITI, CUBA, AZORS, BAHAMAS
Let‘s go to Croatia
Type C
Pair of flat pins with diameter 4,8mm for appliances in protection class 2
Can be used for example : Spain, Sweden, Czech Republic, Phillipines,
Croatia, Iraq, Iceland, Canarian Islands
Let‘s go to Greece
Can be used for example: Greece, Aghanistan, Maledives, India
Let‘s stay home
Type E
Pair of round pins with diameter 4.8mm, grounding tube with diameter 4.8mm
Can be used for example: Czech Republic, Germany, Poland, Tunisia
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Appliance definition
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Main parameters of appliances
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What information is on the label of an appliance
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Division according to the number of phases
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What voltage does the one-phase appliance
operate on?
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How many conductors will you connect to threephase socket in TNC-S network?
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