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ZERO VOLT HIGH SPEED ELECTRONIC LOAD |
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ELZ-175 0V High Speed
Electronic Load. |
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ELZ-175 0V High
Speed Electronic Load.
The ELZ series is capable to load maximum current at 0V input. This
feature is suitable to test such Fuel Cell and Low output voltage DC
power supplies.
As provided maximum of 67.5A load current so it can be used for long
even current density of Fuel Cell has increased.
Constant Current (CC), Constant Resistance (CR), Constant Voltage
(CV), Constant Power (CP), External Control mode, Dynamic loading,
Sequence mode, Short and Current limit functions.
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Maximum
current (67.5A) can be loaded at 0V.
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High
current rate in a compact body.
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25A/us
slew rate
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Peak
loading mode for transient response
testing (Max.2kW)
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Max.
1024 steps in sequence mode.
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External
control mode suitable for
AC impedance measurement.
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Convenient current monitor for I-V evaluation
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Parallel
operation for expanded power
application. (Booster function)
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Peak power
The Extreme power technology manages loading time and average power.
The ELZ series can load much higher current than rated current for
limited time.
0V operation
Load current of 67.5A at 0V input.
AC impedance measurement
Provided external control input for current modulation.
AC impedance can be measured when used with FFT or FR analyzer.
IR measurement by current interruption
Because of high speed switching (25A/μs slew rate), this can
interrupt the load current like relay.
With ELZ series, simple current interruption system can be
configured for IR measurement.
Sequence function
With PC, maximum 1024 steps sequence operation possible.
Various current simulations can be performed.
Low inductance load cable Low-L (Option)
To minimize voltage drop between Electronic load and power device,
Low-L cable is recommended.
Low-L cables are available in 50cm, 1m and 2m.
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Load Section |
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Max rating |
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Input connector |
On front panel |
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Connection |
Terminal |
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Current |
67.5A |
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Voltage |
30V |
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Peak power (Pav1)(*1) |
2000W（20us or less） |
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Peak power (Pav2)(*1) |
215W (20s or less） |
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Rated power (Pave)(*1) |
175W |
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Constant current setting
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Range |
67.5A |
7.5A |
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Resolution(*2) |
10mA |
1mA |
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Accuracy |
+/- 0.2% of stg. +/- 0.1% of f.s.
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Slew rate |
0.25A/us - 25A/us |
0.025A/us - 2.5A/us |
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Internal min resistance (Typ)
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6m ohm (Typ) |
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Min operating voltage (Typ)
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0.0V(67.5A) |
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Minimum rise time |
500ns |
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CR mode 4V range |
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Setting |
10m ohm - 80 ohm |
0.1 ohm - 800 ohm |
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Resolution(*2) |
20ms |
2ms |
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Accuracy(*3) |
+/- 0.5% of Conv.Curr. +/- 0.2% of
f.s. |
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CR mode 30V range |
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Setting |
0.030 ohm - 240 ohm |
0.30 ohm - 2400 ohm |
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Resolution(*2) |
6.66ms |
666us |
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Accuracy(*3) |
+/- 0.5% of Conv. Curr. +/- 0.2% of
f.s. |
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CV mode |
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Voltage range |
30V |
4V |
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Resolution(*2) |
5mV |
0.5mV |
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Accuracy |
+/- 0.2% of stg. +/- 0.2% of f.s.
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CP mode |
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Power range |
175W |
20W |
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Resolution(*2) |
25mW |
5mW |
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Max current |
67.5A |
7.5A |
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Accuracy |
+/- 2.5% of stg. +/- 1% of f.s.
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External control mode
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range |
67.5A |
7.5A |
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Resolution(*2) |
20mA |
2mA |
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Accuracy |
+/- 0.2% of stg. +/- 500mA
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+/- 0.2% of stg. +/- 50mA
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Slew rate |
0.25 - 25A/us |
0.025 - 2.5A/us |
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Min rise time |
500ns |
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Control voltage |
0 - 10V |
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Dynamic mode |
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Control |
Loading mode |
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Loading mode |
CC mode |
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Setting period |
4us - 100ms / 200ms / 500ms / 1.0s
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Resolution |
2us / 5us / 10us / 50us |
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Mode |
Continuous, Single |
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Slew rate(*3) |
0.25 - 25A/us |
0.025 - 2.5A/us |
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Min rise time |
500ns |
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Sequence mode |
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Loading mode |
CC / CR / CV / CP mode |
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Max steps |
1024 |
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Step time |
1ms - 10min |
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Resolution |
1ms(1ms - 100ms) / 100ms(100ms -
10min) |
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Short mode |
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Max current |
Max 67.5A (Current limit setting)
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Current limit setting
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Current range |
67.5A |
7.5A |
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Setting range |
1 - 67.5A |
0.1 - 7.5A |
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Resolution(*2) |
1A |
100mA |
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Load alarm (Protection)
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Over current protection |
Limit the current and protection the
loading circuit |
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Over power protection |
Limit the power and protection the
loading circuit |
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Over voltage alarm |
Warning only, no protection
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Temperature protection |
Open the load and protect the
loading circuit |
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Reverse connection alarm
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Warning only, no protection
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*1 : Peak power : The
rated power and the peak power are controlled in the following
equation.
The peak power is affected by the environment
temperature.
*2 : Resolution : Approximate resolution at each setting mode.
*3 : Conv.Curr is ideal current value calculated by Input voltage /
Resistance being set
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Measurement Section |
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DC voltage |
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Range |
30.000V |
4.000V |
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Resolution |
1.0mV |
0.1mV |
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Accuracy(*1)
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+/- 0.05% of rdg. +/- 0.05% of f.s.
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Measuring time(*2)
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Approx. 100ms |
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DC current |
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Range(*3)
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67.5A |
7.5A |
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Resolution |
0.1mA |
0.1mA |
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Accuracy(*1)
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+/- 0.2% of rdg. +/- 0.2% of f.s.
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Measuring time(*2)
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Approx. 100ms |
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Power |
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Method(*4)
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Calculation [Voltage x Current]
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V x A |
Approx. 200ms |
*1 Guaranteed for 6
months under 23 +/- 5C, 70% RH
*2 Measurement time at the same measurement mode and range.
*3 2 ranges for current setting.
*4 The measurement value is being returned in absolute value.
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General |
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External interface |
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USB |
USB1.1 |
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External control voltage
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Input voltage : 0 - 10V |
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GPIB |
IEEE488.1 |
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General |
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Power |
AC100 - 240V, 50/60Hz |
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Power consumption |
150VA以下(AC100V時) |
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Dimensions |
215(W) X 128.6(H) X 420(D)
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Weight |
Approx. 10Kg |
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TRIG OUT(*1)
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Output |
Insulated pulse output approx. 5V
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Output R |
50 ohm |
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Pulse width |
Insulated pulse output approx. 5V
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CURRENT MONITOR(*1)
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Output |
5V / FS |
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Output R |
Less than 50 ohm |
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Freq. BW |
0 - 50kHz 0.05dB or less
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Phase within BW |
0.5C or less (at 50Khz) |
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Accuracy(*2)
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+/- 0.5% of Conv.Volt. +/- 0.5% of
f.s. |
*1 Factory option
*2 Conv.Volt means approximate voltage calculated
by "Measured current x (Current monitor FSs / Rated current)"
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