MI 2892 Power Master
Recording Practice and Instrument Connection
122
Current clamps:
A1033 (1000A/1V)
900 A
900 A
900 A
Clamp Selected: A 1033
Clamp Range: 1000 A
2700A parallel load
feeding
Load
Instrument display:
Irms = 2700 A
Current transformer:
Primary current: 1A
Secondary Current: 3A
Figure 4.19: Parallel feeding of large load
Example: 2700 A current load is fed by 3 equal parallel cables. In order to measure current we
can embrace only one cable with clamps, and select: Current transformer, Primary current: 1 A,
Secondary current: 3A in clamp menu. Instrument will assume that we measure only third part
of current.
Note: During setup current range can be observed by “Measuring range: 100% (3000 A/V)” row.
Indirect current measurement
Indirect current measurement with primary current transducer is assumed if user selects 5 A current
clamps: A1122 or A1037. Load current is in that case measured indirectly through additional primary
current transformer.
In example below we have 100 A of primary current flowing through primary transformer with ratio 600
A : 5 A. Settings are shown in following figure.
