Low voltage power transformers

   Single-phase low-voltage power transformers of type TP8 of all climatic design with a supply voltage of 220V with a nominal frequency of 50 Hz and a supply voltage of 115/220 V with a nominal frequency of 400 Hz are intended for operation in power supplies of electronic equipment.
   Design transformers is shown in Fig. 1 and Fig. 2, and the overall dimensions are given in Table 2 and Table 3, respectively.
   Basic technical data transformers in no-load and rated load modes are given in Table 4 (for transformers with a frequency of 50 Hz) and Table 5 (for transformers with a frequency of 400 Hz).
   An example of writing a symbol                                                                                                                        
   Transformer TP8 - 1 - 220 - 400                                                       
   Type designation - TP8
   Development serial number - TP8
   Type number - 1   
   Supply voltage - 220
   Power supply frequency - 400                                                                                                                                                                                              
                                                                                                                                                                                                                                  

            EXTERNAL INFLUENCING FACTORS
          
  Sinusoidal vibration:
               frequency range, Hz
                    for transformers with a frequency of 50Hz 1-2000
                     - - - 40Hz 1-5000
               acceleration amplitude, m • s2 (d)
                   for transformers with a frequency of 50Hz 100 (10)
                   - - - 40Hz 400 (40)
           Single action mechanical shock:
                peak shock acceleration, m • s2 (d) 10000 (1000)
                duration of action, ms 0.1-2
          Repeated mechanical shock:
                peak shock acceleration, m • s2 (d) 1,500
                duration of action, ms 1-5
         Atmospheric reduced working pressure, Pa (mm Hg)
               for transformers with a frequency of 50Hz 5,3 * 104(400)
               - - - 40Hz 0.67 * 103(5)
        Atmosph. increased working pressure, Pa (kgf / cm2): 29.4 * 104(3)
        Increased operating temperature of the environment, "С 85
        Reduced operating temperature of the medium, "С minus 60
        High relative humidity, % 98
        Salt (sea) fog.
        Atmospheric condensed precipitation (frost, dew).
        Static dust.

       RELIABILITY PARAMETERS
       Minimum MTBF, h:
                in extreme modes 20,000
                at temperatures from minus 60 to + 60'C 40,000
      Persistence, years 15
      Change in electrical parameters during:
               minimum operating time
               no-load current, % +30
               voltages per sec. exchange in x mode. x., % ± 3
              stress on the second. exchange in the mode of number. load, %
                  for transformers with a frequency of 50 Hz ± 8
                  for transformers with a frequency of 400 Hz + 13 / -8
             insulation resistance of windings, Mohm not less than 20
             shelf life
             no-load current, % +30
             stress on the second. exchange in x mode. x., % ± 3
             stress on the second. exchange in the mode of number. load, %
                  for transformers with a frequency of 50 Hz ± 7
                  for transformers with a frequency of 400 Hz + 12 / -7
                 res. insulation of windings, MOhm, not less than 22
      Permissible deviation of voltages on the secondary windings:
              idling, % ± 3
              at rated load, %:
              for transformers with a frequency of 50 Hz ± 5
              for transformers with a frequency of 400 Hz + 10 / - 5
     Voltage asymmetry of windings II, III
             idling, %, no more than 2
     The permissible deviation of the rated voltage and frequency of the supply voltage are given in table. 1.

        INSTRUCTIONS FOR USE AND OPERATION
  Transformers must be operated in modes not exceeding those indicated above.
  It is allowed to solder no more than two wires to one contact lug, including the leads of suspended parts.
  Soldering "end-to-end" and "overlap" is not allowed.
  The resonant frequency is greater than 5000 Hz.
  The efficiency of transformers is not less than 70%.

  The material was prepared by A.A. Kovpak, town. Doslidnitsky, Kiev region

 

To the list of articles

Order toroidal transformer

 

Total comments: 0

leave a comment

Your email will not be published.

en_GBEN