| OVERVIEW & SPECIFICATION
The Fluke 1550C insulation resistance tester offers digital insulation testing up to 5 kV, making them ideal for testing a wide range of high voltage equipment including switchgear, motors, generators and cables.
Fluke insulation testers can now conduct the entire range of test voltages specified in IEEE 43-2000 with a best in class, 3 year warranty and CAT IV 600 V safety rating. With measurement storage and PC interface, the 1550C is the perfect tool for preventative or predictive maintenance programs designed to identify potential equipment failures before they occur.
- Test voltages to up 5 kV
- CAT III 1000 V, CAT IV 600 V safety rating
- Warning function alerts the user that line voltage is present and gives the voltage reading up to 600 V AC or DC for increased user safety
- Selectable test voltages in 50 V steps from 250 V to 1000 V, and 100 V steps above 1000 V
- Measurements can be stored in up to 99 memory locations, with each location assigned a unique, user defined, label for easy recall
- Long battery life gives the user over 750 tests between charges
- Automatic calculation of Dielectric Absorption (DAR) and Polarization Index (PI) with no additional setup
- Guard system eliminates the effect of surface leakage current on high-resistance measurements
- Large digital/analog LCD for easy viewing
- Capacitance and leakage current measurement
- Ramp function for breakdown testing
- Resistance measurements up to 2 TΩ
- Timer settings up to 99 minutes for timed tests
- 3-year warranty
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| Electrical Specifications |
| The tester’s accuracy is specified for one year after calibration at operating temperatures of 0 °C to 35 °C. For operating temperatures outside the range (-20 °C to 0 °C and 35 °C to 50 °C), add ± .25 % per °C, except on the 20 % bands add ± 1 % per °C. |
| Insulation Resistance Measurement |
| Test voltage (DC) |
Range |
Accuracy (± reading) |
| 250 V |
< 200 kΩ |
Unspecified |
| 200 kΩ to 5 GΩ |
5 % |
| 5 GΩ to 50 GΩ |
20 % |
| > 50 GΩ |
Unspecified |
| 500 V |
< 500 kΩ |
Unspecified |
| 500 kΩ to 10 GΩ |
5 % |
| 10 GΩ to 100 GΩ |
20 % |
| > 100 GΩ |
Unspecified |
| 1000 V |
< 200 kΩ |
Unspecified |
| 200 kΩ to 20 GΩ |
5 % |
| 20 GΩ to 200 GΩ |
20 % |
| > 200 GΩ |
Unspecified |
| 2500 V |
< 200 kΩ |
Unspecified |
| 200 kΩ to 50 GΩ |
5 % |
| 50 GΩ to 500 GΩ |
20 % |
| > 500 GΩ |
Unspecified |
| 5000 V |
< 200 kΩ |
Unspecified |
| 200 kΩ to 100 GΩ |
5 % |
| 100 GΩ to 1 TΩ |
20 % |
| > 1 TΩ |
Unspecified |
| 10000 V (1555 Only) |
< 200 kΩ |
Unspecified |
| 200 kΩ to 200 GΩ |
5 % |
| 200 GΩ to 2 TΩ |
20 % |
| > 2 TΩ |
Unspecified |
| Bar graph range |
0 to 1 TΩ (1550C) – 0 to 2 TΩ (1555) |
| Insulation test voltage accuracy |
-0 %, +10 % at 1 mA load current |
| Induced ac mains current rejection |
2 mA maximum |
| Charging rate for capacitive load |
5 seconds per μF |
| Discharge rate for capacitive load |
1.5 s/μF |
| Leakage current measurement |
Range: 1 nA to 2 mA |
| Accuracy: ± (5 % + 2 nA) |
| Capacitance measurement |
Range: 0.01 μF to 15.00 μF |
| Accuracy: ± (15 % rdg + 0.03 μF) |
| Timer |
Range: 0 to 99 minutes |
| Resolution: Setting: 1 minute, Indication: 1 second |
| Live circuit warning |
Warning range: 30 V to 660 V ac/dc, 50/60 Hz |
| Voltage accuracy: ± (15 % + 2 V) |
| Software specifications |
FlukeView Forms™ basic software requires a PC running Windows XP, Windows Vista , Windows 7 or Windows 8 |
| General Specifications |
| Display |
75 mm x 105 mm |
| Power |
12 V lead-acid rechargeable battery, Yuasa NP2.8-12 |
| Charger Input (AC) |
85 V to 250 V ac 50/60 Hz 20 VA |
| This Class II (double insulated) instrument is supplied with a Class 1 (grounded) power cord. The protective earth terminal (ground pin) is not connected internally. The extra pin is for added plug retention only. |
| Dimensions |
269 mm x 277 mm x 160 mm (10.6 in x 10.9 in x 6.3 in) |
| Weight |
3.7 kg (8.2 lb) |
| Temperature (operating) |
-20 ºC to 50 ºC (-4 ºF to 122 ºF) |
| Temperature (storage) |
-20 ºC to 65 ºC (-4 ºF to 149 ºF) |
| Humidity |
80 % to 31 ºC decreasing linearly to 50 % at 50 ºC |
| Altitude |
2000 m |
| Enclosure sealing |
IP40 |
| Input overload protection |
1000 V AC |
| Electromagnetic compatibility |
EN 61326 |
| Certifications |
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| Safety compliance |
IEC 61010-1: Overvoltage category II, pollution degree 2 |
| IEC 61010-2-030: Measurement 600V CAT IIV / 1000V CAT III |
| IEC 61557-1, IEC 61557-2 |
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