EDMI Atlas Mk10, Справочник по аппаратуре

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Under the Meter Lid
6-7
Under the Meter Lid
Removing the sealable screw allows the meter lid to be removed. Generally
connections to the I/O connectors do not need to be detached to allow the cover to be
removed. Removal of the meter lid is required to access the
Config Jumper
, and to add
or remove the CT to VT links on meters with old style terminal blocks.
Care must be taken as dangerous voltages are present in the circuitry under the meter lid
while the meter is active. Most of the circuitry is at neutral potential.
Even when the meter is not powered, care should be taken to prevent electrostatic
damage to the circuitry of the meter.
CT to VT Links
Whole current meters have CT to VT links between TB1 terminals 1 and 2, 4 and 5, 8
and 9, 12 and 13. There is also a fixed link between 12 and 14. These links may need
to be removed to allow testing on some types of test bench. There are two options for
removing them. The first option has external VT to CT link connections. Figure 6-8
shows the location of the links, just above the terminal block.
•
Figure 6-8 Location of the CT to VT links.
To remove the link connections either loosen the screws, slide the metal shims to the
right and retighten (Figure 6-9), or remove the left hand screws completely for better
isolation (Figure 6-10).
•
Figure 6-9 Meter with the CT to VT links disconnected by sliding shims.
•
Figure 6-10 Meter with the CT to VT links disconnected by removing screws.
The Mk10E Meter 6-7