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Vitrek built the 95X Series from the ground up with DSP technology – to bring you the safest, fastest, most capable, feature rich hipot testers available. The 95X Series combines high output power, with a wide range of AC & DC voltage outputs and extremely low leakage current measurement. Then we added a 4-wire milli-ohmmeter with dynamic range up to 100K ohms and an overlapping Tera-ohm class Insulation Resistance function. Top that off with an available 40 Amp Ground Bond capability and you’re just beginning to get a feel for what the Vitrek 95X Series Hipot Testers can do for you.
For more than 25 years Vitrek has been driven by an obsession to build a better hipot tester. Increased user safety, faster test times, higher output voltages and more functionality have been our driving force. The 95X series is the result of this pursuit – offering power, speed, accuracy and resolution that leave the others far behind.
Speed and power go hand in hand, the 6.5KVDC models offer 50mA of source current for DC Hipot – providing the power you need to rapidly charge and discharge challenging DUTs. Models are also available with DC hipot up to 11KV and 15KV. Most of the 95x series also offer 50mA of sourcing for AC hipot, but for heavier AC loads the 95X can be configured to source up to 100mA or even as much as 200mA. For higher AC hipot voltages the 95X can generate up to 10KV internally and all models are available with an external 30KVAC hipot option.
When it comes to making critical leakage current measurements, the 95X delivers rock-solid resolution down to 100 pico-amps. This high resolution provides built-in insulation resistance measurement (IR) up to a Tera-ohm, add a 4-wire milli-ohmmeter with autoranging up to 100K ohm and an available 40 amp Ground Bond function – and you are beginning to understand the versatility of the Vitrek 95X Series.
The 95X has the ability to directly control up to four 64 channel HV scanners, right out of the box. That is up to 256 test points and using a PC with Vitrek’s QuickTest Pro software you can expand the count up to 640 test points. The HV Switching System of choice is the Vitrek 964i which can hold eight 8 channel switching cards – available in 7, 10 & 15 KV ratings. The 964i also has switching cards to handle routing up to 40 amp ground bond currents.
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Specifications are valid at the 95x terminals for 1 year at ambient temperatures within ±5C of calibration temperature (add 5% of accuracy specification per C outside of this). All specifications are relative to the calibration standards used. Add ½ digit to all accuracies for displayed results (results available with enhanced resolution from interfaces).
The listings below show the maximum loading current and power capabilities of the 95x at ambient temperatures ≤30C. For ambient temperatures above 30C linearly reduce the maximum loading current and power by 1%/C.
For frequencies above 100Hz other than 400Hz, the user should linearly interpolate using the <100Hz and 400Hz capabilities shown in the applicable listing.
Where both a current and power limit is shown, the most stringent limit applies.
951i-954i and 957i, <100Hz : 50mArms (40mArms resistive), reduce by 0.08mA per V above 5525Vrms
951i-954i and 957i, 400Hz : 35mArms, reduce by 0.065mA per V above 5600Vrms
Option AC-2, <100Hz : 200mArms (135mArms resistive), reduce by 0.67mA per V above 1750Vrms
Option AC-2, 400Hz : 140mArms, reduce by 0.4mA per V above 1700Vrms
Option 500VA, <100Hz : 100mArms (50mArms resistive), reduce by 0.14mA per V above 5425Vrms 500VA Above 65mArms has a limited test time (e.g. 1sec at 100mArms)
Option 500VA, 400Hz : 85mArms (50mArms resistive), reduce by 0.11mA per V above 5375Vrms Above 65mArms has a limited test time (e.g. 1sec at 100mArms)
955i and 957i Opt. AC-10, <100Hz : 30mArms (20mArms resistive)
955i and 957i Opt. AC-10, 400Hz : 22mArms
Option AC-30 : 10mArms (7mArms resistive) 250VA
951-4i and 957i (standard build) : 12KΩ + 0.5H
Opt. 500VA : 7KΩ + 0.25H
Opt. AC2 : 1.4KΩ + 0.2H
955i and 957i Opt. AC10 : 25KΩ + 1.0H
SOURCE set to EXT : 200KΩ
Peak Shutdown Current
951-4i and 957i (standard build) : 120mA
Opt. 500VA : 145mA
Opt. AC2 : 280mA
955i and 957i Opt. AC10 : 60mA
SOURCE set to EXT : 21mA
DUT GROUNDED set to YES : 50mA
Test Voltage Range
951-4i and 957i (standard build or Opt. 500VA) : 20 to 6000Vrms, reduce maximum voltage by 0.6V per Hz above 100Hz
955i and 957i Opt. AC-10 : 50 to 10000Vrms, reduce maximum voltage by 1V per Hz above 100Hz
Opt. HSS : 20 to 4000Vrms
Opt. AC-2 : 10 to 2000Vrms, reduce maximum voltage by 0.2V per Hz above 100Hz
Opt. AC-30 : 120 to 30000Vrms
For line voltages below 115V linearly reduce the maximum test voltage by 1%/V unless Opt. LOLINE is fitted (there is no reduction for Opt. LOLINE).
Test Voltage Accuracy
<(± 0.5% ± 1.5V ± (0.01% + 0.2V) per mArms load ± 0.01% per Hz above 100Hz)
955i and 957i Opt. AC10 : Add ±0.1% above 7000Vrms
Opt. AC-30 : <(± 1.5% ± 5V ± (0.05% + 1V) per mArms load)
Test Voltage Overshoot
<5% ( <2% (>0.5s ramp time) Settling to
<±0.5% of final value in
Test Voltage Waveform
Sinewave, 1.35 – 1.46 Crest Factor
Test Frequency Range
951-4i and 957i : 20 to 500Hz
955i and 957i Opt. AC10 : 40 to 500Hz
Opt. AC-30 : 40 to 80Hz
Test Frequency Accuracy
Measurements are performed in the RETURN terminal of the 95x.
1uA to 280mApk (DC-50kHz bandwidth)
<(± 1% ± 1uA) accuracy
<30usec detection time, <3msec response time (typically <500usec)
0.0nA to 200mArms (RMS, In-phase or Quadrature)
Greater of 1 cycle or 10ms measurement period
RMS : <(± 0.5% ± 10nA ± 0.15nA per kV*Hz) accuracy
InPhs : <(± 0.5% ± 10nA ± 0.01nA per kV*Hz) accuracy
Quad : <(± 0.5% ± 10nA ± 0.15nA per kV*Hz) accuracy
Add 0.005% per Hz above 100Hz
955i and 957i Opt. AC10 : Add 50nA (RMS, InPhs and Quad) above 7000Vrms
<±0.005° per Hz phase relative to test voltage (InPhs, Quad)
1 to 30mArms (50KHz-5MHz bandwidth)
<(± 10% ± 1mA) accuracy at 1MHz
4us, 10us, 15us, 20us, 30us or 40us measurement period
<(± 1% of error ± 0.01pF)