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Installation and de-installation
4.7
51/90
De-installation
Dangerous voltage on conductors
The connecting wires at the place of installation must not be live when removing the meter. Touching of live parts is dangerous to life. Remove the
corresponding supply fuses and keep these in a safe place until work is
completed, so that they cannot be replaced by anyone unnoticed.
The meter should be removed as follows:
1.
Remove the two utility seals at the screws of the terminal cover.
2.
Release the two screws of the terminal cover and remove it.
3.
Check that the connecting wires are not live using a phase tester or
universal measuring instrument. If they are live, remove the corresponding supply fuses and keep these in a safe place until work is
completed, so that they cannot be replaced by anyone unnoticed.
4.
Remove the connecting wires of the signal inputs and outputs from the
screwless spring-loaded terminals as follows:
– Place a size 1 screwdriver in the upper opening and insert it turning
slightly upwards (figure 50 A).
– Then draw the wire from the lower opening (figure 50 B).
– Withdraw the screwdriver (figure 50 C).
Figure 50 Removing connections in screwless spring-loaded terminals
Damage to terminals
Never withdraw connecting wires from closed terminals. The terminals
could be damaged.
5.
Release the terminal screws 1, 3, 4, 6, 7, 9, 10 and 12 of the phase
connecting wires with a suitable screwdriver and withdraw the phase
connecting wires from the terminals.
6.
Fit a substitute meter as described in section 4.3 "Connecting meter"
and the following sections.
D000045598 en a – S650 Series 3 – SMA300AR/CR – User Manual
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