Hioki insulation resistance testers or megohmmeters feature all-in-one designs including built-in rugged cases and test lead storage compartments. The IR3455 is a 5-range, 250 V to 5000 V digital insulation resistance tester offering up to 10 TΩ of insulated resistance testing. High performance features include bargraph, built-in memory, leak current and voltage testing, and DAR and PI calculation capabilities to help shorten work time associated with field insulation testing.
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Measure insulation of high-voltage equipment (such as transformers, cables, and motors)
Wide testing voltage range, up to 5.00 kV from 250 V DC
Wide measurement insulation range, up to 10 TΩ
PI (Polarization Index) and DAR (Dielectric Absorption Ratio) automatically calculated / display
Data memory function to reduce handwritten notes
Bright LED luminous scale
Extended operating temperature range of -10°C to 50°C
Basic Specifications
Test voltage
250 V to 5.00 kV DC, (Possible in 25 V steps between 250 V and 1 kV and in 100 V steps between 1 and 5 kV)
Measurement range
0.00 MΩ to 500 GΩ (250 V)
0.00 MΩ to 1.00 TΩ (500 V)
0.00 MΩ to 2.00 TΩ (1 kV)
0.00 MΩ to 5.00 TΩ (2.5 kV)
0.00 MΩ to 10.0 TΩ (5 kV)
Measurement current
1 mA (Test voltage 250 V to 1.00 kV), 0.5 mA (Test voltage 1.10 kV to 2.50 kV) 0.25 mA (Test voltage 2.60 kV to 5.00 kV), Short-circuit current: 2 mA or less
Resistance range
10 MΩ to 10 TΩ, 7 ranges (auto range)
Accuracy
±5% rdg. ±5 dgt. Up to [Test voltage (setting value)/Resistance measurable at 100 nA]
±20% rdg. ±5 dgt. [Test voltage (setting value)/Resistance measurable at 100 nA] to [Test voltage (setting value)/Resistance measurable at 1 nA] or 500 GΩ
±30% rdg. ±50 dgt. [Test voltage (setting value)/Resistance measurable at 1 nA] or 501 GΩ to 9.99 TΩ
Leakage current measurement
1.00 nA to 1.20 mA, 6 ranges (current measurement that occurs when test voltage is generated)
Accuracy ±2.5% rdg. ±5 dgt. (1 mA range); refer to complete catalog for other ranges
Voltage measurement
±50 V to ±1.00 kV DC, 50 V to 750 V AC (50/60 Hz),
Accuracy: ±5 % rdg. ±5 dgt. , Input resistance: Approx. 10 MΩ
Temperature measurement
-10.0 ˚C to 70.0 ˚C, 3 ranges (used with optional sensor)
Accuracy ±1.0 ˚C (0.0 ˚C to 40.0 ˚C); refer to complete catalog for other ranges
Other functions
Insulation Diagnosis (Temperature compensation, PI/DAR display, Step voltage test), Data memory, Communication (USB 2.0, PC application software), auto discharge, hot conductor warning indication, etc.
Display
Digital LCD, max. 999 dgt. with backlight, Bar graph display
Power supply
LR6 (AA) alkaline batteries ×6, Battery pack 9459, or AC adapter 9753 or 9418-15 (100 - 240 VAC)
Continuous use : [LR6] 5 hr, [9459] 9 hr, (Occur 5 kV, +/- open terminal)
Dimensions and mass
260 mm (10.24 in)W × 250.6 mm (9.87 in)H × 119.5 mm (4.70 in)D, 2.8 kg (98.8 oz)
Accessories
Test lead 9750-01 ×1, Test lead 9750-02 ×1, Test lead 9750-03 ×1, Alligator clip 9751-01 ×1, Alligator clip 9751-02 ×1, Alligator clip 9751-03 ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×6, USB cable ×1, PC application software (CD-R) ×1
