Connections in Detail
3-
Connections in Detail
Current and Voltage
• Figure 3-14 Connections for 3 element whole current
Figure 3-14 shows the normal connections for a whole current meter (the meter is only
available in a whole current configuration). The neutral connection must be made, even
if it is not connected to both 12 and 14. The VT/CT links connect TB1 terminals 1 to 2,
4 to 5, 8 to 9, and 12 to 13 to 14. The links are fitted under the main meter cover,
discussed earlier in this chapter.
The nominal voltage input range is 220 - 240 VAC. The absolute limits are 180VAC to
290VAC. The current range depends on the current range of the meter, and should be
limited to Imax (at present normally 100A).
In 3 element mode (4 wire) the maximum line to neutral voltage is 290V and the
maximum line to line voltage is 500V. At any higher voltage the meter may not operate
correctly and damage may occur.
• Figure 3-15 TB1 CT and VT connections for 3 element testing
Figure 3-15 shows the connection methods in 3 element (4 wire) mode when VT/CT
links are not fitted.
The Mk10D Meter 3-9
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