Introduction and Specifications
Performance Specifications 1
1-21
52120A/COIL 3 KA 25-Turn Coil
Number of turns .................................................... 25
Minimum internal jaw dimension to clear wires 26 mm (width) x 36 mm (length)
Maximum input current ........................................ 120 A continuous with built-in 12 V fan on
Maximum voltage .................................................. 4.5 V rms
Accuracy
Input Current
[1]
Frequency
Effective Current
Amp-turns
52120A + Coil Accuracy
[2]
±(% of Amp-turns + % of 52120A range)
% of Amp-turns % of 52120A Range
0 A to 100 A DC 0 to 2500 0.7 % 0.7 %
0 A to 120 A 10 Hz to 65 Hz 0 to 3000 0.7 % 0.7 %
0 A to 120 A 65 Hz to 300 Hz 0 to 3000 0.7 % 0.7 %
0 A to 40 A 300 Hz to 1 kHz 0 to 1000 0.7 % 0.7 %
0 A to 12 A 1 kHz to 3 kHz 0 to 300 0.8 % 1.0 %
0 A to 3 A 3 kHz to 6 kHz 0 to 100 1.5 % 1.0 %
0 A to 1 A 6 kHz to 10 kHz 0 to 50 5.0 % 1.0 %
[1] The inductance and mutual inductance of the 25 turn coil and clamp that is measured causes a frequency dependent compliance
voltage across the coil. The length and configuration of the cables that connect the current to the coil also have an effect.
Maximum input current is 120 A input at approximately 100 Hz. Maximum current input decreases to approximately 0.8 A at
10 kHz.
[2] Includes coil/clamp interaction.
52120A/COIL 6 KA 50-Turn Coil
Number of turns .................................................... 50
Minimum flexible probe length ............................ 500 mm
Maximum input current ........................................ 120 A continuous with built-in 12 V fan on
Maximum voltage .................................................. 4.5 V rms
Accuracy
Input Current
[1]
Frequency
Effective Current
Amp-turns
52120A + Coil Accuracy
[2]
±(% of Amp-turns + % of 52120A range)
% of Amp-turns % of 52120A Range
0 A to 100 A DC 0 to 5000 0.7 % 0.7 %
0 A to 120 A 10 Hz to 65 Hz 0 to 6000 0.7 % 0.7 %
0 A to 120 A 65 Hz to 300 Hz 0 to 6000 0.7 % 0.7 %
0 A to 120 A 300 Hz to 1 kHz 0 to 6000 0.7 % 0.7 %
0 A to 120 A 1 kHz to 3 kHz 0 to 3500 0.8 % 1.0 %
0 A to 25 A 3 kHz to 6 kHz 0 to 1250 1.5 % 1.0 %
0 A to 13 A 6 kHz to 10 kHz 0 to 600 5.0 % 1.0 %
[1] The inductance and mutual inductance of the 50 turn coil causes a frequency dependent compliance voltage across the coil.
Maximum frequency for 120 A input current is approximately 600 Hz. Maximum current input decreases to approximately 13 A at
10 kHz.
[2] Includes coil/probe interaction.
Note
The specifications for these coils are at 99 % confidence level and are the combined
accuracy of the coil and a 52120A. If the coils are used with other current sources
the calibration uncertainty of the coils alone is 0.65 % (99 % confidence level) from
0 Hz to 10 kHz.
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