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CT Ratio Calculator

Inputs

CT Nameplate Ratio (examples: 250/5A, 600/1, 1000/5)

Primary Turns (passes through CT)

Primary Current Injected (A)

Optional measurement

Measured Secondary Current Is (A)

OR Burden Voltage (Vrms)

Burden Resistance (Ω)

If you enter V and R, Is = V/R. If you also enter Is, the Is field wins.

Results

CT Ratio

—

Primary Turns

—

Primary Injected

—

Effective Primary

—

Expected Is

—

Measured Is

—

Error

—

Is_expected = (Ip × Turns / Ip_rated) × Is_rated

Our products are of the highest quality and conform to all local and internationally recognised Approval Certificates.

Email: info@acorp.co.za
Telephone: +27 11 467 3788
Alternative: +27 11 467 1695
James Daly (Manager): +27 72 946 4913

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CT Ratio Calculator