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Digital insulation testing up to 10kV
The 1555 and redesigned Fluke 1550C insulation resistance testers offer digital insulation testing up to 10kV, making them ideal for testing a wide range of high voltage equipment including switch gear, 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 1555 and 1550C are perfect tools for preventative or predictive maintenance programs designed to identify potential equipment failures before they occur.
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Features and benefits:
- Test voltages up to 10 kV provides solutions for all applications
- CAT III 1000 V, CAT IV 600 V safety rating
- Voltage breakdown detection alerts the user that 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 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 2TΩ
- 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
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Test voltage (dc)
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Range (dc)
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Accuracy (± reading)
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| 250 V |
< 200 kΩ
200 kΩ to 5 GΩ
5 GΩ to 50 GΩ
> 50 GΩ |
unspecified
5 %
20 %
unspecified |
| 500 V |
200 kΩ
200 kΩ to 10 GΩ
10 GΩ to 100 GΩ
> 100 GΩ |
unspecified
5 %
20 %
unspecified |
| 1000 V |
< 200 kΩ
200 kΩ to 20 GΩ
20 GΩ to 200 GΩ
> 200 GΩ |
unspecified
5 %
20 %
unspecified |
| 2500 V |
< 200 kΩ
200 kΩ to 50 GΩ
50 GΩ to 500 GΩ
> 500 GΩ |
unspecified
5 %
20 %
unspecified |
| 5000 V |
< 200 kΩ
200 kΩ to 100 GΩ
100 GΩ to 1 TΩ
> 1 TΩ |
unspecified
5 %
20 %
unspecified |
10000 V
(1555 only) |
< 200 kΩ
200 kΩ to 200 GΩ
10 GΩ to 2 TΩ
> 2 TΩ |
unspecified
5 %
20 %
unspecified |
| Bar graph range |
0 to 1 TΩ |
| Insulation test voltage accuracy |
-0 %, +10 % at 1 mA load current |
| Induced ac mains current rejection |
2 mA maximum |
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Charging rate for capacitive load
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5 seconds per μF
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Discharge rate for capacitive load
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1.5 s/μF
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Leakage current measurement
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Range: 1 nA to 2 mA
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Accuracy: ± (5 % + 2 nA)
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Capacitance measurement
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Range: 0.01 uF to 15.00 μF
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Accuracy: ± (15 % rdg + 0.03 μF)
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Timer
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Range: 0 to 99 minutes
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Resolution Accuracy:
Setting: 1 minute
Indication: 1 second
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Live circuit warning
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Warning Range:
30 V to 660 V ac/dc,
50/60 Hz
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Voltage Accuracy:
± (15 % + 2 V)
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General specifications
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| Display |
75 mm x 105 mm |
| Power |
12 V lead-acid rechargeable battery, Yuasa NP2.8-12 |
| Charger Input (AC) |
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 |
170 mm x 242 mm x 330 mm (6.7 in x 9.5 in x 13 in) |
| Weight |
3.6 kg (7.94 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 |
CAT III 1000 V, CAT IV 600 V |
| Pollution degree |
2 |
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