The SR634 is a general purpose 1000AAC current probe designed for use with instruments that require a 5A current input. It works as a traditional current transformer (with ratios of 250:5, 500:5 or 1000:5) and has an output of 5mA per amp measured in the jaw. The SR634 has jack output termination that accept 4mm banana plugs. The rounded jaw design on this probe makes it well-suited for power applications where high accuracy and low phase shift is important.
Specifications
Model
SR634*
ELECTRICAL
Nominal Range
250, 500, 1000A
Measurement Range
0.1 to 1200A
Transformation Ratio
250:5, 500:5, 1000:5
Output Signal
5mA, 10mA, 20mAac/Aac (5Aac @ 250, 500 or 1000A)
Accuracy (250A Range)
1 to 5A 5A 12.5A 50A 250A 300A
≤10% ± 0.1A 10% of Reading 5% of Reading 2.5% of Reading 2% of Reading 2% of Reading
Phase Shift (250A Range)
12.5A 50A 250A 300A
10° 10° 10° 10°
Accuracy (500A Range)
1 to 10A 10A 25A 100A 500A 600A
≤6% ± 0.1A 6% of Reading 3% of Reading 2% of Reading 1% of Reading 1% of Reading
Phase Shift (500A Range)
10A 25A 100A 500A 600A
6° 4° 3° 2.5° 2.5°
Accuracy (1000A Range)
1 to 20A 20A 50A 200A 1000A 1200A
≤6% ± 0.1A 5% of Reading 3% of Reading 1.5% of Reading 1% of Reading 1% of Reading
Phase Shift (1000A Range)
20A 50A 200A 1000A 1200A
5° 3° 1.5° 1° 1°
Overload
1200A for 30 min ON, 15 min OFF
Frequency Range
30Hz to 5kHz; current derating above 1kHz using the formula: 1000A x 1/F (in kHz)
Note: Reference conditions: 23 ± 3°K, 20 to 75% RH, 48 to 65Hz, external magnetic field <40A/m, no DC component, no external current carrying conductor, test sample centered. Load impedance 0.2Ω @ lead <40mΩ for 250A range. *Diode Protection for open secondary (Output)
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