Download ME381 and MT381 User manual

ME381 and MT381
Table of contents
1. Safety information ................................................................................................ 13
1.1.
Safety instructions ......................................................................................... 14
2. Energy metering and Mx381 meters .................................................................... 16
3. Mx381 meters introduction .................................................................................. 18
3.1.
Standards and references ............................................................................. 18
3.2.
Mx381 meter appearance ............................................................................. 20
3.3.
Main meter properties ................................................................................... 24
3.4.
Mx381 meter connection into the network..................................................... 26
3.5.
Energy and demand registration ................................................................... 27
3.5.1
Energy .................................................................................................... 28
3.5.2
Demand .................................................................................................. 29
3.6.
Measurement principle .................................................................................. 33
3.6.1
Energy LED impulse output .................................................................... 33
3.6.2
Energy METRO pulse output .................................................................. 33
3.6.3
Measured quantities ............................................................................... 35
3.6.4
Voltage ................................................................................................... 36
3.6.5
Current.................................................................................................... 37
3.6.6
Net frequency ......................................................................................... 38
3.6.7
Power ..................................................................................................... 38
3.6.8
Power factor ........................................................................................... 38
3.6.9
Energy .................................................................................................... 39
3.6.10
Measurement period parameterization ................................................ 41
4. Meter construction ............................................................................................... 42
4.1.
Technical figures and dimensions ................................................................. 42
4.2.
Meter case .................................................................................................... 44
4.2.1
Terminal block ........................................................................................ 45
4.2.2
Meter cover............................................................................................. 45
4.2.3
Terminal cover ........................................................................................ 46
4.2.4
Sealing.................................................................................................... 48
4.3.
Front plate ..................................................................................................... 50
4.4.
Console keys................................................................................................. 54
4.4.1
LCD ........................................................................................................ 54
Mx381_User_manual_eng_V1.00.doc 3