Product Introduction The Fluke 1555 Insulation Resistance Tester is a specialized electrical testing instrument used to measure the insulation resistance of wiring, cables, motors, transformers, and other electrical equipment.  Fluke 1555   is a high-voltage insulation resistance tester developed and manufactured by Fluke Corporation. It is designed to test the insulation resistance of high-voltage power equipment, wires, and cables. Fluke 1555 has high precision and reliability, a wide measurement range, and is suitable for maintenance and troubleshooting of various industrial and power systems. It can provide reliable insulation test results and has a visual display screen and an easy-to-use interface. Fluke 1555 also provides various security features to ensure the safety of testing operations and comply with relevant security standards and regulations. It is one of the commonly used tools by professional electrical engineers and maintenance personnel to ensure the electrical safety and reliability of the system. Product Features 1. For the testing of windings with star connections and neutral point leads, the instrument can adopt a three-phase simultaneous measurement method to test the resistance of phases A0, B0, and C0, saving testing time. And first test the data of phase A0, and then test the three-phase simultaneously, which solves the problem of the inability to test the neutral point lead out resistance when testing the three-phase simultaneously, making the test data closer to the single-phase test value. 2. For the testing of Y-shaped and △ - shaped windings, the instrument can perform three-phase automatic testing and convert the three-phase unbalance rate. 3. The instrument has the functions of assisting magnetic testing and demagnetization, meeting various needs of on-site experiments. 4. The instrument has multiple protection functions such as back electromotive force protection, wire breakage protection, and power-off protection. 5. The instrument has a wide measurement range, up to 200 Ω, and high accuracy. 6. Clock and date display without power failure; The data storage methods are divided into local storage and USB storage, among which local storage can store 200 pieces of test data; The USB flash drive stores data in Word format, which can be directly edited and printed on a computer. 7. Thermal printer printing function, fast and silent. 8. Small size, light weight, convenient to carry and use. Technical Parameter single phase 20 A      0.500mΩ～1.000Ω 10A        1.000mΩ～2.000Ω 5  A      10.00mΩ～4.000Ω 1 A        100.0mΩ～20.00Ω 0.1A      1.000 Ω～200.0Ω three-phase 10A + 10A 1.000mΩ～0.800Ω 5 A + 5 A  10.00mΩ～1.600Ω 1 A + 1 A 100.0mΩ～8.000Ω  Accuracy ± (reading x 0.2%+2 words) Resolution 0.1u Ω Working power supply AC220V ± 10%, 50/60Hz Operating temperature -10 ℃~50 ℃ Relative humidity <90%, no condensation Instrument volume  410 × 290 × 220mm Instrument weight 9Kg (excluding testing line)