Fluke 1555 FC 10 kV Insulation Tester
The Fluke 1555 FC is a high-voltage digital insulation resistance tester designed for preventive maintenance, commissioning and diagnostic testing of electrical insulation systems.
Its 10 kV test capability makes it suitable for high-voltage equipment such as switchgear, motors, generators and cables, while measurement capability up to 2 TΩ allows technicians to identify deterioration in high-resistance insulation.
Key Features
10 kV maximum DC insulation test voltage
Selectable test voltages from 250 V to 10,000 V
50 V increments from 250 V to 1000 V
100 V increments above 1000 V
Insulation resistance measurement up to 2 TΩ
Automatic Polarization Index (PI) calculation
Automatic Dielectric Absorption Ratio (DAR) calculation
Fluke Connect® wireless connectivity
Remote test setup, start and stop
Real-time insulation resistance trending
Wireless test result storage and reporting
Guard system for minimizing surface leakage effects
Ramp function for breakdown testing
Leakage current measurement
Capacitance measurement
Timed tests up to 99 minutes
Up to 99 memory locations
Large digital/analog LCD
CAT III 1000 V / CAT IV 600 V
More than 750 tests per battery charge
3-year warranty
10 kV High-Voltage Insulation Testing
The primary capability of the Fluke 1555 FC is high-voltage insulation resistance testing.
The instrument provides selectable DC test voltages from 250 V to 10,000 V, allowing technicians to select an appropriate test voltage for different electrical equipment and insulation systems. Fluke states that the 1555 can perform the complete range of test voltages specified in IEEE 43-2000.
Available test voltage steps include:
250 V
500 V
1000 V
2500 V
5000 V
10,000 V
The instrument also provides intermediate selectable voltages in 50 V steps up to 1000 V and 100 V steps above 1000 V.
Insulation Resistance up to 2 TΩ
The Fluke 1555 FC measures insulation resistance up to 2 TΩ.
This high resistance measurement capability is useful for evaluating insulation condition in:
Motors
Generators
Transformers
Switchgear
Power cables
Electrical distribution equipment
High-voltage systems
The instrument provides a large digital/analog display for viewing rapidly changing insulation resistance measurements.
Automatic PI and DAR Calculations
The Fluke 1555 FC automatically calculates:
Polarization Index (PI)
Dielectric Absorption Ratio (DAR)
These diagnostic functions provide additional information about insulation condition without requiring separate manual calculations.
This makes the instrument useful for preventive maintenance programs where insulation performance needs to be compared over time.
Fluke Connect Wireless Testing
One of the key differences between the 1555 FC and conventional insulation testers is its wireless connectivity.
Using Fluke Connect, technicians can:
Configure tests remotely
Start and stop tests remotely
Monitor measurements from a safe distance
View real-time trends
Save test results
Analyze historical data
Create customized reports
Remote operation helps reduce the amount of time technicians need to spend near potentially hazardous electrical equipment during high-voltage insulation testing.
Real-Time Trending
The Fluke 1555 FC can transmit test data wirelessly so technicians can view a real-time trend graph on a compatible mobile device.
Instead of relying only on rapidly changing numerical readings on the instrument display, technicians can visually monitor how insulation resistance changes during the test.
This is particularly useful for longer-duration insulation tests.
Guard System
The built-in Guard system helps eliminate the influence of surface leakage current during high-resistance measurements.
This can improve the usefulness of insulation resistance testing when surface contamination or moisture may create unwanted leakage paths.
Ramp Function
The Fluke 1555 FC provides a ramp test function for breakdown testing.
The ramp function can help identify insulation breakdown behavior by progressively increasing the applied test voltage rather than immediately applying the maximum test voltage.
Leakage Current and Capacitance Measurement
In addition to insulation resistance, the 1555 FC measures:
Leakage current from 1 nA to 2 mA
Capacitance from 0.01 μF to 15.00 μF
These measurements provide additional information when evaluating electrical insulation and connected equipment.
Timed Insulation Testing
The built-in timer supports test durations of up to 99 minutes.
Timed testing can be used for standardized insulation tests and for observing resistance behavior over a defined period.
The timer resolution is 1 minute for setting, with 1-second indication resolution.
Test Result Memory
The Fluke 1555 FC can store measurements in up to 99 memory locations.
Each memory location can be assigned a user-defined label, helping technicians organize measurements by equipment, asset or test location.
Live Circuit Warning
The tester includes a live circuit detection function that warns the user when line voltage is present.
The specified warning range is 30 V to 660 V AC/DC, helping improve safety before a high-voltage insulation test is initiated.
Applications
The Fluke 1555 FC is suitable for:
Motor insulation testing
Generator insulation testing
Power cable testing
Switchgear testing
Electrical equipment commissioning
Preventive electrical maintenance
High-voltage insulation diagnostics
Power distribution equipment testing
Electrical asset condition assessment
Maintenance trend monitoring
Typical Equipment Tested
The 1555 FC can be used for insulation testing of:
Motors
Generators
Switchgear
Electrical cables
High-voltage electrical equipment
Distribution systems
Industrial electrical assets
General Specifications
Maximum test voltage: 10,000 V DC
Test voltage range: 250 V to 10,000 V
Insulation resistance: up to 2 TΩ
Leakage current: 1 nA to 2 mA
Capacitance: 0.01 μF to 15.00 μF
Timer: 0–99 minutes
Memory: 99 locations
Display: 75 × 105 mm
Battery: 12 V rechargeable lead-acid
Battery life: 750+ tests
Operating temperature: -20 °C to +50 °C
Storage temperature: -20 °C to +65 °C
Altitude: 2000 m
Enclosure: IP40
Dimensions: 269 × 277 × 160 mm
Weight: 3.7 kg
Safety rating: CAT IV 600 V / CAT III 1000 V
Warranty: 3 years
Standard Package
The standard Fluke 1555 FC configuration includes:
Fluke 1555 10 kV Insulation Tester
Heavy-duty test leads with alligator clips
Red, black and green test cables
AC power cord
Soft carrying case
Infrared adapter with interface cable
USB-IR cable installation guide
Fluke Connect wireless connector
Quick reference card
Fluke 1555 Kit Option
The Fluke 1555/Kit FC adds an IP67 hard case and a Certificate of Calibration to the package. This is worth displaying separately on the Shopify product page if you offer both configurations.
FAQ
What is the maximum test voltage of the Fluke 1555 FC?
The Fluke 1555 FC provides insulation test voltages up to 10,000 V DC.
What is the maximum insulation resistance measurement?
The Fluke 1555 FC measures insulation resistance up to 2 TΩ.
Does the Fluke 1555 FC support Fluke Connect?
Yes. The FC version supports wireless Fluke Connect operation, including remote test setup, test control, real-time trending and test-result reporting.
Can the Fluke 1555 FC calculate PI and DAR?
Yes. The instrument automatically calculates Polarization Index (PI) and Dielectric Absorption Ratio (DAR).
What equipment can be tested with the Fluke 1555 FC?
Typical applications include insulation testing of motors, generators, switchgear and electrical cables, as well as other high-voltage electrical equipment.
Does the Fluke 1555 FC include a calibration certificate?
The standard Fluke 1555 FC configuration does not list a Certificate of Calibration among its included accessories. The Fluke 1555/Kit FC configuration does include a Certificate of Calibration.
