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Voltage and current measurement, Input voltage, Current input with flexi-set – Atec Fluke-1740 Series User Manual

Page 5: Current input for clamp

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5 Fluke Corporation 1740 Series Three-Phase Power Quality Loggers Memobox

Voltage and current measurement

Input voltage

Input range V

I

P-N

max 480 V ac

Input range V

I

P-P

max 830 V ac

Max. overload voltage

1. V

I

Input range selection

By job programming

Connections

P-P or P-N, 1- or 3-phase

Nominal voltage V

N

≤ 999 kV with PTs and ratio

Input resistance

App. 80 k

Ω per chan. Lx-N Single phase (L1 or A, L or B, L3 or C connected): app. 300 kΩ

Intrinsic uncertainty

0.1 % of V

I

Voltage transformer

Ratio: < 999 kV / V

I

Ratio selection

By job programming

Current input with Flexi-Set

Input ranges I

I

(L1 or A, L2 or B, L3 or C, N)

15 A/150 A/1500 A/3000 A ac

Measuring range

0.75 A to 3000 A ac

Intrinsic uncertainty

< % of I

I

Position influence

Max. ± % of measured value – for distance conductor to meas. head > 30 mm

Stray field influence

< ± A ac for I

ext

= 500 A ac and distance to measuring head > 00 mm

Temperature coefficient

< 0.05 %/K

Current transformer

Ratio

≤ 999 kA/I

I

Ratio selection

By job programming

Connection

3-phase, 3-phase +N, phase L1 or A and L3 or C ( W-meter-method) 7 pole connector

Current input for clamp

Input ranges I

I

(L1 or A, L2 or B, L3 or C, N)

0.5 V nominal (for I

I

) 1.4 Vpeak

Intrinsic uncertainty

< 0.3 % of I

I

Max. overload

10 V ac

Input resistance

App. 8. k

Current transformer

Ratio

≤ 999 kA/I

I

Ration selection

By job programming

Power configurations

Delta, -Element Delta, Wye, Single Phase, Split Single Phase