High Voltage
Differential
Probes
HVD3605, HVD3206
HVD310x
Key Features
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1 kV, 2 kV, 6 kV CAT safety
rated models
World’s only 1500 Vdc safety
rated probe per IEC/EN 61010-
031:2015
Widest differential voltage
ranges available
Exceptional common-mode
rejection ratio (CMRR) across a
broad frequency range
1% gain accuracy
High offset capability at both
high and low attenuation
AC and DC coupling
ProBus active probe interface
with automatic scaling
Auto-zero capabilities
Wide oscilloscope compatibility
The HVD3000 series high voltage differential probes provide high CMRR
over a broad frequency range to simplify the measurement challenges
found in noisy, high common-mode power electronics environments.
The probe’s design is easy-to-use and enables safe, precise high voltage
floating measurements.
Exceptional Common-Mode
Rejection Ratio
The CMRR for the probes is
exceptional out to very high
frequencies, greatly improving
measurement capability in the noisy,
high common-mode environments
found in power electronics. The high
CMRR combined with low probe
noise and high offset capability
provides superior measurement
capabilities compared to other HV
differential probes.
Widest Application Coverage
The HVD3000 series of high voltage
differential probes cover the fullest
range of applications, from 120/240 V
switch-mode power supplies through
600 V class and 5 kV class electrical
apparatus, Each model has the best
available gain accuracy, widest differ-
ential and offset voltage range, and
superior CMRR.
World’s Only 2 kV Rated Probe
The HVD3206 is specifically designed
for 1500 Vdc solar photovoltaic (PV)
measurements per the IEC/EN 61010-
031:2015 standard.
High Precision Measurements
HVD3000 series probes provide 1%
gain accuracy enabling precise voltage
measurements. AutoZero capability
ensures further measurement
precision by allowing small offset
drifts to be calibrated out of the
measurement.
Complete Probe Integration
The ProBus interface provides power
and communication to the probe
eliminating the need for a separate
power supply or batteries. Attenuation
is automatically selected based on
oscilloscope gain range (V/div) setting.
WIDE APPLICATION COVERAGE - 600 V TO 5 KV APPARATUS
600 V Class, 3-phase Electrical Apparatus
The HVD310x probes are available in a range of bandwidths from 25 to 120 MHz with standard 2 meter cable (6 meter
cable model available). All probes have industry best CMRR for best noise-immunity, are guaranteed to 1% gain accuracy,
and have the industry’s widest differential voltage range in a 1 kV rated high voltage differential probe.
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Only 1 kV safety rated probe that
serves the full 600 V class requirement
1500 V differential range with
industry’s best overshoot
measurement capability (to 2000 Vpk)
Industry’s best offset capability
(1500 V) when used with HDO Series
oscilloscopes
Bandwidth rating up to 120 MHz
6 meter cable model available
(HVD3106-6M)
Models available without accessories
for a lower cost (HVD310x-NOACC)
Sinusoidal AC
Line Input
Vrms or
Vac
400
480
600
690
Vpk-pk
Line-Line
1131
1358
1697
1952
Line-
Neutral
653
784
980
1127
DC Bus
Voltage
Vdc
566
679
849
976
Drive / Inverter
Pulse-Width Modulated (PWM) Output
Vpk (Rated)
Line-Line
566
679
849
976
Line-
Neutral
327
392
490
563
Vpk (with Overshoot)*
Line-Line
849
1019
1274
1464
Line-
Neutral
491
588
735
845
*Based on 50% overshoot condition
5 kV Class, 3-phase Electrical Apparatus
The HVD3605 probe is safety-rated for 6000 Vrms and 8485 V(DC + peak AC) for full coverage of 5 kV class apparatus. The
probe has ample 100 MHz of bandwidth, is standard with a 6 meter cable, is guaranteed to 1% gain accuracy, has excellent
CMRR, and has the industry’s widest differential voltage range.
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Only probe that permits AC Line,
DC Bus, and Drive/Inverter output
voltage probing through
4160 V apparatus ratings
Industry’s best overshoot
measurement capability
(to 7600 Vpk)
Industry’s best offset capability
(6000 V) when used with
HDO Series oscilloscopes
Standard 6 meter cable
Vrms or
Vac
2400
3300
4160
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Sinusoidal AC
Line Input
Vpk-pk
Line-
Line-Line Neutral
6788
9334
11766
3920
5388
6794
DC Bus
Voltage
Vdc
3395
4666
5884
Drive / Inverter
Pulse-Width Modulated (PWM) Output
Vpk (Rated)
Line-Line
3395
4666
5884
Line-
Neutral
1960
2694
3397
Vpk (with Overshoot)*
Line-Line
4244
5833
7355
Line-
Neutral
2450
3368
4246
*Based on 25% overshoot condition
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WORLD’S ONLY 2 KV SAFETY RATED MODEL
Solar PV Inverters
The HVD3206 probe is rated to 1500 Vdc (2000 V DC + peak AC). This makes the probe ideal for testing single-phase
or three-phase inverters or newer 1500 Vdc rated string-inverters (per IEC/EN 61010-031:2015). The HVD3206 has
the same excellent 1% gain accuracy, industry-leading CMRR, industry-best offset range, standard 2 meter cable (6
meter cable model available), and a guaranteed 2000 Vpk differential voltage range.
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Line-
Neutral
637
637
Only 1500 Vdc safety rated probe per
IEC/EN 61010-031:2015
Guaranteed 2000 Vpk differential
voltage range
Industry’s best offset capability
(1500 V) when used with HDO Series
oscilloscopes
Bandwidth rating up to 120 MHz
6 meter cable model available
(HVD3206-6M)
Solar String DC
Bus Voltage
Vdc
1000
1500
Line-Line
849
849
Sinusoidal AC Output
Vpk (Rated)
Line-
Neutral
490
490
Vpk (with Overshoot)*
Line-Line
1104
1104
*Based on 30% overshoot condition
DC-DC Converters
High-power DC-DC converters can operate at substantial voltages, 500 Vdc or higher. The HVD310x models provide up to
1000 Vdc common-mode (HVD3206 models provide up to 1500 Vdc) and high precision (1% gain accuracy) DC voltage
measurements. Automatic switchable attenuation keeps the probe in the optimum measurement range. Multiple probes
can be used to understand complex device switching performance.
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Common mode range up to ±2000 V
(DC + peak AC) with HVD3206
High precision - 1% accuracy
Automatic gain switching for optimum
performance
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SUPERIOR PERFORMANCE AT LOWER VOLTAGES
120 V / 240 V Half-Bridge Circuit Topologies
Single-phase switch-mode power supplies and other devices utilizing half-bridge topologies need test and validation at
DC bus voltages up to 340 Vdc with up to 680 Vp-p on the input voltage. HVD310x probes are cost-effective solutions for
probing the wide range of high voltage signals present in these systems. “No Accessory (NOACC)” versions of these probes
permit additional cost savings. Use your existing accessories or purchase just the ones you want.
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High precision - 1% accuracy
Automatic gain switching for optimum
performance
Input Voltage
(Vrms or Vac)
120
240
Input Voltage
(Vpk-pk)
340
680
DC Bus Voltage
(Vdc)
170
340
Output PWM Voltage
(Vpk)
170
340
MOSFET/IGBT Devices
Upper-side Gate Drive Voltage Measurements
Typically from 3 to 20 volts and “floating” at up to the DC
Bus voltage. HVD Series probes can provide very good
results, but the HVFO High Voltage Fiber Optic probe
is optimized for the best upper-side gate drive voltage
measurements with 140 dB CMRR, reduced DUT loading,
and better pulse response.
HVFO103
High Voltage Fiber
Optically-Isolated Probe
Device Analysis
Conduction loss or Rds(on) measurements require a
voltage probing solution that has high CMRR, fast overdrive
recovery, voltage clamping (so the oscilloscope is not
overdriven), compensation flatness, gain/amplification to
see small signal details, and precise offset generation to
see the switching device’s turn-off performance. For this
type of analysis, the Teledyne LeCroy DA1855A Differential
Amplifier is the best solution. It provides 100 MHz
bandwidth, excellent common mode rejection ratio (CMRR)
of 100,000:1 (typical), and overdrive recovery to within
100 mV from a 400 V input signal in less than 100 ns.
DA1855A
Differential Amplifier
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UNDERSTANDING HV DIFFERENTIAL PROBE RATINGS
AC line voltages and power electronics systems can operate at very high voltages, and all parts of the measurement
circuit are not necessarily connected to ground, requiring HV safety ratings. Additionally, a variety of terms may be used
to describe the same voltage. Below is a simple tutorial to help you understand the various types of voltage terms and
how they relate to each other. Understanding these voltage terms is necessary to ensure the correct probe selection.
Single-phase AC Line Input
Ratings are provided in Vrms (also referred to as Vac) referred
Line-Neutral. AC Line inputs are usually grounded and these
voltages can be assumed to have a 0V reference voltage.
Vpeak is calculated as √2*Vrms and Vpk-pk is calculated as
2*Vpeak. The example to the right is for a 120 Vrms rating.
Three-phase AC Line Input
Ratings are provided in Vrms (also referred to as Vac)
referred Line-Line (L-L), which can be converted in
magnitude to a Line-Neutral basis by dividing by √3.
Vpeak (L-L) is calculated √2*Vrms and Vpk-pk is calculated
as 2*Vpeak. The example on the left is for a 480 Vrms
three-phase rated system with signals shown as Line-Line.
Rectified AC (DC Bus/Link Voltage)
For three-phase inputs, the three Line-Neutral (L-N) AC
Line inputs are rectified and summed to provide a “stiff” DC
(bus/link) voltage for the input to an inverter subsection.
The example shown to the right is for a 600 Vrms system.
The Line-Neutral RMS voltages are 600V/√3, and each
Vpeak(L-N) is calculated as √2*Vrms. The DC bus voltage
after rectification and filtering is equal to √3*Vpeak(L-N), or
847 Vdc in this case.
Inverter or Drive H-Bridge or
Cascaded H-Bridge Outputs
The nominal peak voltage (+ or -) of the PWM signals
without accounting for signal overshoot is equal to the DC
bus voltage. The measured 0V differential voltage value is
not ground-referenced, and therefore a differential probe
suitably rated to the DC bus voltage is recommended. Note
that the +Vpeak and -Vpeak plus overshoot safety margin
(typically ~50%) is what the HV differential probe must
measure - Vpk-pk (2*Vpeak) will never occur in the circuit.
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