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Installation and De-Installation
4.4
Check of Connections
4.5
Commissioning, Functional Check and Sealing
D000030110 d – E650 Series 3 (ZMD400AT/CT, ZFD400AT/CT) – User Manual
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 or the jumpers of the voltage circuits
in the test terminal block re-closed 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 com-
pleting the work to prevent anyone re-inserting them unnoticed. The jump-
ers in the test terminal block of the voltage circuits should again be opened
and secured.
Dangerous voltage on current transformers
The current transformer circuits must be closed before commissioning and
functional check of the meter. Opening the jumpers short-circuiting the sec-
ondary sides of the transformers permit the transformer current to flow
through the meter. Opening of the short-circuit jumper must never interrupt
the circuit.
Prerequisites for commissioning and functional check
The functional check requires voltage to be applied and load applied to all
phases. If export is possible, determine first the energy direction present.
If no network voltage is present, commissioning and functional check must
be performed at a later date.
Via the test terminal blocks you can also supply the meter from suitable
auxiliary sources on the secondary side with the system switched off.
Repeat the functional check later with the system switched on.
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© Landis+Gyr AG
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