Fluke 1744 - Manual (Page 59)

1744/1743
Users Manual
50
Input Voltage
Input range V
I
P-N: 69, 115, 230, or 480 V ac
Input range V
I
P-P 120, 200, 400, or 830 V ac
Max overload voltage 1.2 V
I
Input range selection By job programming
Connections P-P or P-N, 1- or 3-phase
Nominal voltage V
N
≤ 999 kV (using PTs and ratios)
Input resistance Approx. 820 ke per channel. Lx-N
Single phase (L1 or A, L2 or B, L3 or C connected):
app. 300 ke
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, 150, 1500, or 3000 A ac
Measuring range 0.75 A to 3000 A ac
Intrinsic uncertainty < 2% of I
I
Position influence Max. ±2% of m.v. for distance conductor to
measuring head >30 mm
Stray field influence <± 2 A for Iext= 500 A ac and distance to measuring
head >200 mm
Temperature coeff. 0.005% / K
Current transformer Ratio : ≤ 999 kA / I
I
Ratio selection By job programming
Connection 3-phase, 3-phase + N 2-phase L1 or A and L3 or C
(2 W-meter-method) 7-pole connector