ZES ZIMMER LMG450, Руководство пользователя

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General LMG450
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frequency converters or standard main supply with L1, L2, L3, N and PE (in this case you
could for example measure I
N
and U
NPE
!)
In this situation there is no group B!
The standard wiring for this is ‘4+0 Channels’.
•
You measure with 3 channels (group A) at one system and with the 4
th
channel (group B) at
another system. Examples for such systems are standard 3 phase systems with one phase
output, motor applications at frequency converters where the torque is measured with the
4
th
channel or car applications, where the 4
th
channel measures the DC power of the battery.
The standard wiring for this is ‘3+1 Channels’.
If you have installed the option star to delta conversion, (L45-O6) you have three further
possible wirings:
‘3+1, U*I*->U
∆
I
∆
’
‘3+1, U
∆
I*->U
∆
I
∆
’
‘3+1, U
∆
I*->U*I*’
•
You measure with 2 channels (group A) at one system and with the other two channels
(group B) at the second system. Examples for this could be three phase converter from
50Hz to 60Hz.
Both groups are measured in 2 wattmeter method. There are two possible applications:
You measure a 3phase, 3wire system (aron circuit, Aron set to on)
You measure a 2phase, 3wire system.(Aron set to off).
The standard wiring for this is ‘2+2 Channels’. If you have installed the option star to delta
conversion (L45-O6) you have two further possible wirings:
‘2+2, U
∆
I*->U
∆
I
∆
’
‘2+2, U
∆
I*->U*I*’
If a group has more than one measuring channel, you can get additional information about the
group:
•
In many cases the instantaneous values of all used measuring channels are calculated
together. By this you can see for example the not measured voltages and currents in wiring
‘2+2 Channels’ (aron circuit).
This virtual channel can be used like a standard channel (you get all values, scope,
harmonics, flicker, ...)
This kind of channels we call ‘linked channels’
•
The total values of a group are calculated (total active power, total power factor, total
energy, ...).
This kind of channels we call ‘sum channels’.