| General |
| Intrinsic error |
Refers to the reference conditions and is guaranteed for two years |
| Warranty |
2 years |
| Recalibration interval |
2 years recommended |
| Quality system |
developed, designed, and manufactured according to DIN ISO 9001 |
| Reference conditions |
23 °C ± 2 K; 74 °F ± 2 K , Vm = 230 V ± 10 % 50 Hz ± 0.1 Hz or 60 Hz ± 0.1 Hz
phase sequence L1, L2, L3
|
| interval length |
10 minutes
Wye connection (L1, L2, L3 to N)
Power supply: 88 V to 265 V ac |
| Ambient conditions |
| Working temperature range |
-10 °C to 55 °C (14 °F to 131 °F) |
| Storage temperature range |
-20 °C to 60 °C (-4 °F to 140 °F) |
| Reference temperature range |
23 °C ± 2 K (74 °F ± 2 K) |
| Relative humidity |
Fluke 1745: Class B2 acc. IEC 60654-1
Fluke 1744/43: Class C2 acc. IEC 60654-1 |
| Housing |
robust, fully insulated housing and accessories |
| Environmental protection |
Fluke 1745: IP50 as per EN60529
Fluke 1744/43: IP65 as per EN60529 |
| Safety |
IEC/EN 61010-1 600 V CAT III
300 V CAT IV, pollution degree 2
double insulation |
| Type test voltage |
5.2 kV rms, 50 Hz/60 Hz, 5 s |
| EMC |
| Emission |
IEC/EN 61326-1, EN55022 |
| Immunity |
IEC/EN 61326-1 |
| Input voltage |
| Input range VI P-N |
max 480 V AC |
| Input range VI P-P |
max 830 V AC |
| Max. overload voltage |
1.2 VI |
| Input range selection |
By job programming |
| Connections |
P-P or P-N, 1- or 3-phase |
| Nominal voltage VN |
<= 999 kV with PTs and ratio |
| Input resistance |
App. 820 kΩ per chan. Lx-N Single phase (L1 or A, L2 or B, L3 or C connected): app. 300 kΩ |
| Intrinsic uncenrtainty |
0.1 % of VI |
| Voltage transformer |
Ratio: <999 kV / VI |
| Ration selection |
By job programming |
| Current input with Flexi Set |
| Input ranges II L1 or A, L2 or B, L3 or C, N |
15 A / 150 A / 1500 A / 3000 A ac |
| Measuring range |
0.75 A … 3000 A ac |
| Intrinsic uncertainty |
< 2 % of II |
| Position influence |
Max. ± 2 % of measured value – for distance conductor to meas. head > 30 mm |
| Stray field influence |
< ± 2 A ac for Iext=500 A ac and distance to measuring head > 200 mm |
| Temperature coefficient |
< 0.05 % / K |
| Current transformer |
Ratio <= 999 kA / II |
| 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 |
| Current input for clamp |
| Input ranges II L1 or A |
L2 or B, L3 or C, N: 0.5 V nominal (for II) 1.4 Vpeak |
| Intrinsic uncertainty |
< 0.3 % of II |
| Max. overload |
10 V ac |
| Input resistance |
App. 8.2 kΩ |
| Current transformer |
Ratio Ω 999 kA / II |
| Power systems |
Delta, 2-Element Delta, Wye, Single Phase, Split Single Phase |
| Power supply |
| Functional Range |
88 V to 660 V absolute, 50 Hz / 60 Hz |
| 100 V to 350 V dc Internal fuse |
630 mA T |
| Power consumption |
5 Watts |
| Ride through |
Fluke 1745: Internal battery for typ. > 5 hours ride through with intelligent power management |
| Fluke 1743/44 |
3 sec Capacitor |
| Fuse |
Power supply fuse can be replaced in service facility only. Supply can be connected in parallel to measuring inputs (up to 660 V) |
| Display |
| Display, indicators |
LEDs for status and voltage levels
Fluke 1745: LC-display with backlight for voltage, current, active power, phase sequence. |
| Interface |
RS 232, 9600...115 000 Baud, automatic Baud rate selection, 3-wire communication |
| Dimensions |
| Fluke 1745 |
282 mm x 216 mm x 74 mm (115in x 88in x 33in) |
| Fluke 1743/1744 |
170 mm x 125 mm x 55 mm (69in x 51in x 22in) |
| Weight |
| Fluke 1745 |
approx. 3 kg |
| Fluke 1744/1743 |
approx. 2 kg |
| Measurement |
| A/D converter |
16 bit, sample rate: 10.24 kHz |
| Anti-aliasing filter |
FIR-Filter, fc =4.9 kHz |
| Frequency response |
Uncertainty < 1 % of Vm for 40 Hz to 2500 Hz |
| Interval length |
1, 3, 5, 10, 30 s, 1, 5, 10, 15, 60 minutes |
| Averaging time for Min/max values |
½, 1 mains period, 200 ms,1 , 3 , 5 s |
| Time base |
Resolution: 10 ms (at 50 Hz), deviation: 2s/day at 23 °C; 74 °F ± 2K |
