Hãng sản xuất: FLUKE
Model: 1744
Xuất xứ: USA
Bảo hành: 12 tháng
Thông số kỹ thuật:
| General Data | |
| 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 … 265 V AC |
| Environment conditions | |
| Working temperature range: | -10 °C to 55°C; 14 °F to 131°F |
| Operating temperature range: | 0 °C to 35°C; 32 °F to 95°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 |
| Protection type | |
| Fluke 1745: | IP50 as per EN 60529 |
| Fluke 1744/1743: | IP65 as per EN 60529 |
| 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 |
| Voltage and Current Measurement | |
| 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 |
| 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 |
| Logger | |
| 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, indicators | LEDs for status and voltage levels Fluke 1745: LC-display with backlight for voltage, current, active power, phase sequence. |
| Memory | |
| Intervals: | Capacity 8 MB Flash-EPROM 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 |
| 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 1743/1744: | 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 ± 2 K |
Bộ Datalogger công suất 3 pha Fluke 1744: Là công tơ điện hàng ngày cho các kỹ thuật viên khắc phục sự cố và phân tích các vấn đề về chất lượng điện. Có khả năng ghi đồng thời lên đến 500 thông số công suất lên đến 85 ngày và theo dõi các sự kiện, các logger điện này giúp phát hiện các vấn đề về chất lượng điện liên tục và khó tìm. Phần mềm PQ Log đi kèm nhanh chóng đánh giá chất lượng điện tại lối vào dịch vụ, trạm biến áp hoặc tại tải, theo tiêu chuẩn EN50160 mới nhất.
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