Check Of Connections; Commissioning, Functional Check And Sealing - Landis+Gyr E650 Series User Manual

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4.4

Check of connections

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4.5

Commissioning, functional check and sealing

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© Landis+Gyr
Effects of connection errors
Only a properly connected meter measures correctly!
Every connection error results in a financial loss for the power company!
Before putting into operation, check again whether all meter connections
are connected correctly according to the connection diagram.
Dangerous voltage on conductors
The supply fuses must be re-inserted before commissioning and functional
check of the meter. If the terminal cover is not screwed tight, there is a
danger of contact with the connection terminals. Contact with live
components is dangerous to life. The relevant supply fuses should
therefore be removed before making any modifications to the installation
and these kept in a safe place until completing the work to prevent anyone
re-inserting them unnoticed.
Prerequisites for commissioning and functional check
If no mains voltage is present, commissioning and functional check must be
performed at a later date.
The installed meter should be put into service and checked as follows:
1. Insert the supply fuses removed for installation. The meter is switched
on.
2. Check whether the operating display is correct (no error message).
3. Check on the display whether all three phases L1, L2 and L3 are
indicated and show the right phase sequence.
– If one phase is not present or less than 20 V, then the relevant
symbol is absent.
– With the normal phase sequence L1-L2-L3 the symbols are dis-
played continuously.
– If, however, the meter is connected with reversed phase sequence
(e.g. L2-L1-L3) the symbols flash. The direction of field rotation
(clockwise or anticlockwise) is determined by the parameterisation.
This has no influence on the measuring behaviour of the meter.
Figure 49. Phase sequence indication
4. Remove all supply fuses.
D000030108 en m – E650 Series 3 – ZMD300AT/CT – User Manual
Installation and uninstallation