Here are some features and capabilities of the Fluke 1663:

1. Insulation Resistance Testing: Helps in checking the insulation of wiring to ensure it is intact and will prevent potential faults.

2. Continuity Testing: Verifies that there are no open circuits in the conductive paths.

3. RCD Testing: Checks the operation of residual-current devices (RCDs) to ensure they trip under fault conditions.

4. Loop and Line Resistance: Provides measurements that can indicate potential issues in the installation.

5. Phase Sequence Testing: Helps ensure that motors and other equipment are wired correctly and will rotate in the expected direction.

6. Voltage Measurement: Ensures that the voltage levels in the installation are within the expected range.

7. Earth Resistance Testing: Checks the resistance of earthing to ensure safety, especially in fault conditions.

8. Automatic Test Sequences: The Fluke 1663 offers pre-set test routines that automatically run multiple tests without manual intervention, saving time and reducing the risk of user error.

9. Large Display: Features a clear display that shows results in an easily readable format.

10. Safety Ratings: Designed with safety in mind and adheres to key international standards for installation testing.

11. Memory and Data Storage: Some models in the 1660 series, including the 1663, might have the capability to store test results, which can then be transferred to other devices or systems for reporting or analysis.

12. Rugged Design: Built for field use, the Fluke 1663 is robust and designed to withstand rough handling and challenging work environments.

Professionals involved in electrical installation, maintenance, or inspection will find tools like the Fluke 1663 invaluable. It provides the comprehensive testing capabilities needed to ensure that electrical installations are safe and meet regulatory standards.