Watt Meter

10760

Manufacturer Part Number10760
DescriptionWatt Meter
ManufacturerSimpson
10760 datasheets
 

Specifications of 10760

Meter FunctionWattMeter Range0W To 750W
Meter Size/dimensions4.5 In.Scale Length89mm
Meter ShapeRectangularDisplay Accuracy ±2%
Accuracy+/-2 %Barrel Size2.83"
Power Meter Range0-750 WEquipment TypeWattage Meter
Range0 - 750Size4.50 in
Meter MovementDynamometerRohs CompliantNA
Lead Free Status / RoHS Statusna  
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Donut Current Transformer Wrapping Information
Donut Current Transformer Wrapping Information
C
Primary Turn Ratio Modification
6
Formula:
Ka = Kn x Nn / Na
Where:
Ka = Actual Transformer Ratio
Kn = Nameplate Transformer Ratio
Na = Actual Number of Primary Turns
Nn = Nameplate Number of Primary Turns
The ratio of the current transformer can be modified by adding
more primary turns to the transformer. By adding primary
turns, the current required to maintain five amps on the sec-
ondary is reduced.
Example:
A 100:5 current transformer designed for one
primary turn.
1 Primary Turn
Nameplate
Actual
Ratio
Ratio
100:5
100:5
2 Primary Turns
Nameplate
Actual
Ratio
Ratio
100:5
50:5
4 Primary Turns
Nameplate
Actual
Ratio
Ratio
100:5
25:5
Primary Turn Ratio Modification
Formula:
lp
Ns
ls
Np
Where:
lp - Primary Current
ls - Secondary Current
Np - Number of Primary Turns
Ns - Number of Secondary Turns
Example:
A 300:5 Current Transformer.
300p
60s
5s
1p
(In practicality one turn is dropped from the secondary as a ratio correc-
tion factor.)
The ratio of the current transformer can be modified by altering the
number of secondary turns by forward or backwinding the secondary
lead through the window of the current transformer. By adding second-
ary turns, the same primary current will result in a decrease in second-
ary output. By subtracting turns, the same primary current will result in
greater secondary output.
Again using the 300:5 example adding five secondary turns will require
325 amps on the primary to maintain the 5 amp secondary output or
325p
65s
5s
1p
Deducting 5 secondary turns will only require 275 amps on the primary
to maintain the 5 amp secondary output or
325p
65s
5s
1p
The above ratio modifications are achieved in the following manner: