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Power supplies and transformers

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USB power supply Legrand 077594 Module frame White

USB power supply Legrand 077594 Module frame White

ELEKTRO - SYCHRA, spol. s r. o.
Starting at
€29.99 +VAT
CZK 763.88
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 9003
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 240
  • Frequency: 50 - 60
Supplier
ELEKTRO - SYCHRA, spol. s r. o.
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USB power supply Legrand 774170 Flush mounted (plaster) Beige

USB power supply Legrand 774170 Flush mounted (plaster) Beige

ELEKTRO - SYCHRA, spol. s r. o.
Starting at
€26.90 +VAT
CZK 685.04
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 1013
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 240
  • Frequency: 50 - 60
Supplier
ELEKTRO - SYCHRA, spol. s r. o.
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USB power supply Legrand 770270 Flush mounted (plaster) Aluminium

USB power supply Legrand 770270 Flush mounted (plaster) Aluminium

ELEKTRO - SYCHRA, spol. s r. o.
Starting at
€29.73 +VAT
CZK 757.19
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 7040
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 240
  • Frequency: 50 - 60
Supplier
ELEKTRO - SYCHRA, spol. s r. o.
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USB power supply Legrand 764694 Flush mounted (plaster) Beige

USB power supply Legrand 764694 Flush mounted (plaster) Beige

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€13.66 +VAT
PLN 63.15
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 1013
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 250
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 753212 Flush mounted (plaster) Beige

USB power supply Legrand 753212 Flush mounted (plaster) Beige

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€25.26 +VAT
PLN 116.79
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 1013
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 100 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 755114 Flush mounted (plaster) Anthracite

USB power supply Legrand 755114 Flush mounted (plaster) Anthracite

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€55.19 +VAT
PLN 255.19
  • Max. output current [mA]: 1000
  • RAL-number: 7015
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 250
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Schneider Electric EPH2700262 Flush mounted (plaster) Stainless steel

USB power supply Schneider Electric EPH2700262 Flush mounted (plaster) Stainless steel

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€25.67 +VAT
PLN 118.67
  • Min. depth of built-in installation box [mm]: 30.8
  • Number of outputs: 2
  • Output voltage [V]: 5
  • Max. output current [mA]: 2100
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 068118 Module frame Anthracite

USB power supply Legrand 068118 Module frame Anthracite

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€28.98 +VAT
PLN 133.98
  • Max. output current [mA]: 1000
  • RAL-number: 7015
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 250
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 753312 Flush mounted (plaster) Aluminium

USB power supply Legrand 753312 Flush mounted (plaster) Aluminium

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€26.52 +VAT
PLN 122.64
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 7040
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 100 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 067462 Module frame

USB power supply Legrand 067462 Module frame

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€19.28 +VAT
PLN 89.14
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 753114 Flush mounted (plaster) Anthracite

USB power supply Legrand 753114 Flush mounted (plaster) Anthracite

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€55.70 +VAT
PLN 257.53
  • Max. output current [mA]: 1000
  • RAL-number: 7015
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 250
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 753012 Flush mounted (plaster) Beige

USB power supply Legrand 753012 Flush mounted (plaster) Beige

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€25.06 +VAT
PLN 115.89
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 1013
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 100 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 664797 Flush mounted (plaster) Anthracite

USB power supply Legrand 664797 Flush mounted (plaster) Anthracite

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€37.30 +VAT
PLN 172.48
  • Max. output current [mA]: 1000
  • RAL-number: 7015
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 250
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 754995 Flush mounted (plaster) White

USB power supply Legrand 754995 Flush mounted (plaster) White

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€18.13 +VAT
PLN 83.83
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 9003
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 100 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 077594 Module frame White

USB power supply Legrand 077594 Module frame White

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€26.65 +VAT
PLN 123.22
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 9003
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 077594 Module frame White

USB power supply Legrand 077594 Module frame White

TT Partner Artur Krupa
€33.05 +VAT
PLN 152.79
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 9003
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 240
  • Frequency: 50 - 60
Supplier
TT Partner Artur Krupa
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USB power supply Legrand 753011 Flush mounted (plaster) White

USB power supply Legrand 753011 Flush mounted (plaster) White

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€25.06 +VAT
PLN 115.89
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 9003
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 100 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Schneider Electric EPH2700223 Flush mounted (plaster)

USB power supply Schneider Electric EPH2700223 Flush mounted (plaster)

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€20.32 +VAT
PLN 93.93
  • Min. depth of built-in installation box [mm]: 30.8
  • Number of outputs: 2
  • Output voltage [V]: 5
  • Max. output current [mA]: 2100
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 077591 Module frame White

USB power supply Legrand 077591 Module frame White

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€17.88 +VAT
PLN 82.67
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 1500
  • RAL-number: 9003
  • Output voltage [V]: 5
  • Number of outputs: 1
  • Operating voltage [V]: 220 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Schneider Electric EPH2700221 Flush mounted (plaster) White

USB power supply Schneider Electric EPH2700221 Flush mounted (plaster) White

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€20.32 +VAT
PLN 93.93
  • Min. depth of built-in installation box [mm]: 30.8
  • Number of outputs: 2
  • RAL-number: 9003
  • Output voltage [V]: 5
  • Max. output current [mA]: 2100
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Schneider Electric EPH2700269 Flush mounted (plaster) Bronze

USB power supply Schneider Electric EPH2700269 Flush mounted (plaster) Bronze

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€25.67 +VAT
PLN 118.67
  • Min. depth of built-in installation box [mm]: 30.8
  • Number of outputs: 2
  • Output voltage [V]: 5
  • Max. output current [mA]: 2100
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 754997 Flush mounted (plaster) Aluminium

USB power supply Legrand 754997 Flush mounted (plaster) Aluminium

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€19.04 +VAT
PLN 88.02
  • Min. depth of built-in installation box [mm]: 40
  • Max. output current [mA]: 2400
  • RAL-number: 7040
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 100 - 240
  • Frequency: 50 - 60
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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USB power supply Legrand 50680 Flush mounted (plaster) White

USB power supply Legrand 50680 Flush mounted (plaster) White

Agartha Company s.r.o.
€12.10 +VAT
CZK 308.26
  • Max. output current [mA]: 1500
  • RAL-number: 9003
  • Output voltage [V]: 5
  • Number of outputs: 2
  • Operating voltage [V]: 220 - 250
  • Frequency: 50 - 60
Supplier
Agartha Company s.r.o.
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USB power supply Schneider Electric EPH2700261 Flush mounted (plaster) Aluminium

USB power supply Schneider Electric EPH2700261 Flush mounted (plaster) Aluminium

EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
€25.67 +VAT
PLN 118.67
  • Min. depth of built-in installation box [mm]: 30.8
  • Number of outputs: 2
  • Output voltage [V]: 5
  • Max. output current [mA]: 2100
Supplier
EL-MARO KRECZETOWSCY, RATAJCZAK SPÓŁKA JAWNA
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Didn't find what you were looking for? We will help you!

Power supplies and transformers

Power supplies and transformers are elements of the power grid and electrical installation, as well as automation systems. They are primarily used to change the output voltage in relation to the input voltage, but these devices cannot be used interchangeably, at least not in all cases.

Changing the voltage of the electrical system using power supplies and transformers

Although the task of both power supplies and transformers is to change the voltage of the electrical system, there are significant differences between them. A transformer is simply an electrical machine that transfers AC electricity from the input circuit to the output circuit. The transformers do not run on direct current. In turn, power supplies not only transform the voltage in terms of value, but also convert it from DC to AC and vice versa.

Electrical installation safety, transformers and power supplies

The main task of each transformer is to ensure the safety of the electrical installation, and in the case of transformer applications generating voltages lower than 12 V, also to protect human life.

Transformers in power grids are used to gradually lower the voltage in order to obtain the so-called low voltage, which is used to supply public utility facilities, as well as residential and single-family construction, as well as some industrial plants.

Smaller transformers are inserted into the LV electrical installation to adapt the voltage to specific consumers that require it. Examples include halogen lamps powered by 12V voltage or instantaneous water heaters powered by safe voltage.

Power supplies perform a similar function as transformers, both in the form of separate devices (e.g. power supplies for smartphones or laptops), but also built-in, for example in various household appliances.

Transformer and impulse power supplies in electrical installations

The most popular and widely available power supplies on the market include traditional transformer devices and electronic switching power supplies. Both solutions have their strengths and weaknesses - the most important thing when choosing the right camera is to precisely define the tasks of the power supply and the environment in which it is to work.

Transformer power supplies - advantages and disadvantages

Transformer power supplies, also known as linear power supplies, are used where low noise level and output power are required. Some manufacturers, e.g. Zamel or F&F, use voltage regulation with short-circuit current limiters and thermal protections in traditional transformer power supplies. The advantages of linear power supplies include:

  • low ripple and noise,

  • fast transient reaction,

  • low cost of production of devices with lower powers (the value of 400 W is assumed to be borderline of the price level).

The biggest disadvantages of transformer power supplies are:

  • low energy efficiency,

  • relatively heavy weight and dimensions,

  • high cost of production of devices with power over 400 W due to the generation of excessive heat at higher powers.

Although transformer power supplies have a long history, they are still used today. However, due to their disadvantages, they have been replaced by impulse power supplies in many applications.

Switch mode power supplies - advantages and disadvantages

Switch-mode power supplies are electronic devices, and their characteristic feature is the so-called high power density, i.e. relatively small dimensions at high rated powers. This allows the installation of devices in a small space, and thus saves space in control or electrical cabinets. The advantages of switching power supplies include:

  • relatively small size,

  • high efficiency regardless of the level of output voltages,

  • can be used to generate high output powers,

  • relatively low production cost, even at high powers.

Unfortunately, these power supplies also have disadvantages, which include higher ripple than transformer, and the output and common mode noise, as well as slower response and high-frequency spectrum content in the output signal.