Measurement Uncertainties for Test Benches
A test bench consists of several elements which can introduce additional variable errors.
Maximum Current for Energy Meters
An energy meter has certain specifications, including maximum current. This is the base for all kind of meter type tests.
Markings on the Case of Energy Meters
The IEC 62052-11 Edition 2 has introduced some changes for the meter marking and documentation. Today we cover the mandatory content of the nameplate for IEC meters.
Ring Wave Immunity Test
The IEC 62052-11 Ed.2 comes with a lot of changes for meter type testing. Another new introduced test for electromagnetic compatibility (EMC) is the ring wave immunity test.
Electrostatic Discharge Test for Energy Meters
Sometimes it happens that you touch the door knob and you get an electrical shock. It’s not dramatically for your body but an unpleasant feeling.
The Stability of IEC Standards
Meter manufacturers, utility laboratories and type testing institutes have planning security until year 2025.
The Critical Change Value
The critical change value indicates the maximum amount of change allowed in the meter’s energy registers during disturbance tests without any current flowing in the meter’s current circuits.
The Optical Test Output and Pulses
Each electronic energy meter must have at least one optical test output. Commonly its named with flashing pulse diode or similar.
Where is the Basic Current?
In the last 100 years we had a lovely Ib for direct connected meters. Now the name has changed to nominal current In.
The Initial Start-Up for Energy Meters
Electronic energy meters are like small computers. The need some time for starting up.