Elgama G1B Series - Construction and Display

16
5 Construction
5.1 Case
Meter case, fixing holes and terminal block conform to the requirements of standard DIN 43857.
Meter case can be made from transparent highly mechanically resistant and fire retardant
insulation material – polycarbonate, stabilized by ultraviolet rays or molded of non-transparent
polycarbonate with transparent polycarbonate windows for LCD, optical interface and optical test
output. It protects meter interior parts and its nameplate. Main cover (transparent and non-
transparent parts of main cover) is fixed to the base by two sealing screws. Removal of main cover
of mounted meter could be done only after terminal cover removal. An option of special sealing
bolts preventing disassemble of meter is available. Terminal cover is fastened with 1 sealing screw
(suspended seal). Access to the terminals without terminal cover removal is excluded. This affords
additional level of security to the customer. Terminal cover has a hole for threading sealing wire to
sealing screw. The possibility to touch the meter terminals with sealing wire while sealing the
terminal cover is prevented.
Figure (See Figure 5-1) presents meter exterior parts and allotment of control elements. For case
dimensions and allotment of fixing holes see Figure A-0-1.
There is a liquid crystal display (LCD), optical communication interface, optical scroll key for
display control, sealable and not sealable buttons on the main cover of the meter. See chapter 11
for the explanation of display control commands, and chapter 6.10 for the description of push
buttons.
Table 5-1 Explanation of Figure
1
Optical Interface
6
LCD
2
Optical test output [imp/kWh]
7
Nameplate
3
Scroll push-button or Multifunctional (two-position) button
8
Changeable battery cover
4
Sealing screws of main cover and terminal cover
9
Sealed push-button
5
Eyelet
10
Status indicator (LED) of internal mains relay
Figure 5-1 G1B meter exterior view with transparent cover Figure 5-2 G1B meter exterior view with non-transparent cover
5.2 Nameplate
Nameplate for meter, with transparent cover, is printed on plates made of PET material during the
meter manufacturing process. This ensures that all marks and inscription are clear, non-erasable