140-50 Current Coil

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140-50 Current Coil

Product catalog summary

General Data:

Continuous rating of 20 A, with a maximum of 30 A for 5 minutes.
Coil turns available in x25 and x50 configurations.
Accuracy is ±0.3% for both DC and AC currents up to 100 Hz.
Typical impedance for x25 coil: 77 µH + 25 mΩ at 50/60 Hz, 77 µH + 37 mΩ at 1 kHz.
Typical impedance for x50 coil: 170 µH + 50 mΩ at 50/60 Hz, 170 µH + 75 mΩ at 1 kHz.
Cross-section area: 25 x 13 mm for 25 turns, 24 x 26 mm for 50 turns.
Operating temperature range: 5 °C to 40 °C.
Dimensions: 195 x 125 x 40 mm, Weight: approximately 1.2 kg.

Important Note:

Connecting a clamp meter increases the total impedance, leading to a higher voltage drop at coil terminals. If the voltage drop exceeds the compliance voltage of the current source, it may cause an overload. To prevent this, reduce the amplitude and/or frequency of the current.

Highlights:

Designed for calibrating AC/DC clamp ammeters up to 1500A.
Features dual multipliers: x50 and x25.
Offers a simple and cost-effective solution with low voltage drop.

Description:

The 140-50 Current Coil includes two separate negative terminals for x25 and x50 circuits and a joint positive terminal. Calibration should occur in a safe environment free from magnetic conductive parts to avoid interference with the magnetic field, which could affect calibration accuracy. Proper positioning of the clamp meter is crucial for optimal results.

Catalog excerpts

Designed for calibration of AC/DC clamp ammeters up to 1500A Dual multiplier x50, x25 Simple, cost saving Low voltage drop 140-50 Current Coil has two separate negative terminals for x25 and x50 coil circuits and one joint positive terminal. Clamp meters should be calibrated in safe environment where no magnetic conductive parts could interfere with current coil’s magnetic field and thus influence uncertainty of calibration. Clamp meter should be positioned as in the pictures below for best results. GENERAL DATA Number of coil turns Typical x25 coil impedance* Typical x50 coil impedance* Cross section area of the post Operating range * Connecting a clamp meter to 140-50 Current Coil increases its total impedance, which in turn increases voltage drop at coil terminals for any given current and frequency combination. Increasing voltage drop beyond max. compliance voltage of current source (f.e. multifunction calibrator) will cause the current source to overload and trip. If this happens, reduce amplitude and/or frequency of set current to decrease voltage drop down below compliance voltage limit. Zelezna 3 | 619 00 Brno | Czech Republic | 420 543 250 886 | [email protected] |

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140-50 Current Coil

140-50 Current Coil

Catalog excerpts

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