Voltage and current measurement, Input voltage, Current input with flexi-set – Atec Fluke-1740 Series User Manual
Page 5: Current input for clamp
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
Ω
Current transformer
Ratio
≤ 999 kA/I
I
Ration selection
By job programming
Power configurations
Delta, -Element Delta, Wye, Single Phase, Split Single Phase