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.

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 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