23 ¡ÆC ¡¾ 2 K; 74 ¡ÆF ¡¾ 2 K , Vm=230 V ¡¾ 10%, 50 Hz ¡¾ 0.1 Hz or 60 Hz ¡¾ 0.1 Hz

Phase sequence:

L1, L2, L3

Interval length:

10 minutes

Wye connection:

(L1, L2, L3 to N)

Power supply:

88 V ... 265 V AC

Operating temp. range:

0 ¡ÆC to 35¡ÆC; 32 ¡ÆF to 95¡ÆF

Storage temp. range:

-20 ¡ÆC to 60¡ÆC; -4 ¡ÆF to 140¡ÆF

Reference temp. range:

23 ¡ÆC ¡¾ 2 K; 74 ¡ÆF ¡¾ 2 K

Relative humidity:

Fluke 1745: Class B2 acc. IEC 60654-1
Fluke 1744/43: Class C2 acc. IEC 60654-1

Fluke 1745:

IP50 as per EN 60529

Fluke 1744/1743:

IP65 as per EN 60529

Emission:

IEC/EN 61326-1, EN55022

Immunity:

IEC/EN 61326-1

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 k¥Ø per chan. Lx-N Single phase (L1 or A, L2 or B, L3 or C connected): app. 300 k¥Ø

Intrinsic uncenrtainty:

0.1 % of VI

Voltage transformer:

Ratio: <999 kV / VI

Ration selection:

By job programming

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. ¡¾ 2 % of measured value – for distance conductor to meas. head > 30 mm

Stray field influence:

< ¡¾ 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

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 k¥Ø

Current transformer:

Ratio ¥Ø 999 kA / II

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)

Intervals:

A function > 12000 intervals for > 85 days with 10 min intervals
P function > 30000 intervals for > 212 days with 10 min intervals

Events:

> 13000

Memory model:

linear, circular

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)

Fluke 1745:

approx. 3 kg

Fluke 1744/1743:

approx. 2 kg

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:

¨ö, 1 mains period, 200 ms,1 , 3 , 5 s

Time base:

Resolution: 10 ms (at 50 Hz), deviation: 2s/day at 23 ¡ÆC; 74 ¡ÆF ¡¾ 2 K