Glossary

Everything you need to know about technical terms, abbreviations, types of protection and X-dimension determination from the world of KRONENBERG. Here you will find answers to the most frequently asked questions.

Glossary

Everything you need to know about technical terms, abbreviations, types of protection and X-dimension determination from the world of KRONENBERG. Here you will find answers to the most frequently asked questions.

Lift Gobbledygook.

Service is important to us and part of our corporate culture. That is why we provide you with useful information about the technical terms and abbreviations used in our catalogue on this site. We also offer you information on the protection classes described in the catalogue and valuable information on how to determine the X-dimension.

  • Overview of technical terms and abbreviations used in our catalogue:

    ACalternating current
    DCdirect current
    NCnormally closed contact
    NOnormally open contact
    COchangeover contact
    Uirated isolation voltage
    Ithconventional thermal current in free air
    Uimprated impulse withstand voltage
    Uerated operational voltage
    Ierated operational current
    AC-15 utilization category for alternating voltage with inductive load
    DC-13 utilization category for direct voltage with electromagnetic load
    B10dnumber of cycles at which 10 % of electromechanical components have failed dangerously ausgefallen sind
    TMmission time
    EDduty cycle in %
  • Overview of the protection classes described in the catalogue:

    IPxyindex number x index number y
    IP00no protection against contact and foreign bodiesno water protection
    IP20protection against solid objects greater than 12 mmno water protection
    IP40protection against grain-shaped solid objects greater than 1 mmno water protection
    IP44protection against grain-shaped solid objects greater than 1 mmfront side protection against splashing water from all directions
    IP54protection against dustfront side protection against splashing water from all directions
    IP65protection against dust ingressprotection against water jets from all directions
    IP67protection against dust ingressprotection against immersion (in depths from 150 mm until 1000 mm no detrimental quantity of water may ingress with time limitation)
  • Definition of the X-dimension:

    X-dimension useThe X-dimension is the length specification for the order-related production of the latch bolt.
    scopethis instruction applies to the following door lock systems:
    DL(F), DL(F)MO, EL(F), CL(F), CL(F) MO
    measuring equipmentA tape measure or similar measuring tools are sufficient.
    tolerancesX-dimension tolerance DL(F) and EL(F): X + 1.5mm
    X-dimension tolerance CL(F): X +2 / -1 mm
    minimum length X-dimensionthe X-dimension must not be shorter than the following lengths:
    • door interlocks without oiled felt ring and holder: 5 mm
    • door interlocks with oiled felt ring and holder: 14 mm
    maximum length X-dimensionthe X-dimension must not exceed the following lengths:
    • DL(F), EL(F): 90 mm
    • DL(F)MO: 60 mm
    • CL(F), CL(F)MO: 35 mm

    Measure with door lock installed:

    We recommend carrying out the measurement with the door lock installed if possible.
    You will find these two installation variants on site:

    • proceeding:

       

      1. Measure the distance (a) between the door leaf (TB) and the frame (Z).
      2. Measure the thickness (t) of the frame sheet.
    • proceeding:

       

      1. Measure the distance (a) between the door leaf (TB) and the frame (Z).
      2. Measure the thickness (t) of the frame sheet.
      3. Measure the thickness (tu) of the support (U).

    measuring at door interlock uninstalled:

    at uninstalled door interlock you can determine the X-dimension in two ways:

    • note:
      Ensure that the faulty closure device is cancelled at the door interlocks DLF, ELF and CLF.

      proceeding:
      Measure the length (la) from the top edge of the latch bolt (RA) to the outside of the housing (GA).

      For the DL(F)- and EL(F) types applies:
      X-dimension = la – 20 mm

      For the CL(F) applies:
      X-dimension = la – 14.5 mm

    • note:
      Ensure that the latch bolt is pushed in completely.

      proceeding:
      Measure the length (le) from the top edge of the latch bolt (RA) to the outside of the housing (GA).

      For the DL(F)- and EL(F) types applies:
      X-dimension = le + 5 mm

      For the CL(F) applies:
      X-dimension = le + 3.5 mm

    note:

    Within a lift installation different X-dimensions can occur.
    If several or all door interlocks at a lift installation are replaced, please check the X-dimension at the doors concerned!

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