Specifications

G4500 BLACKBOX PORTABLE OPERATIONAL MANUAL
16
The Hardware | Elspec
Voltage Inputs
The BLACKBOX Portable provides 4 fast sampling AC/DC voltage inputs and
an auxiliary DC voltage input.
Fast AC/DC Channels
The fast sampling AC/DC channels are designed for AC network monitoring but
are suitable for DC voltage readings as well. The inputs are marked as L1, L2,
L3, and N with corresponded colors Red for L1, Yellow L2, Blue L3 and
Black for an N (Neutral).
All inputs are sensed/sampled simultaneously and continuously at 1024 samples
per cycle resolution using the Earth terminal (Green colored) as a reference. The
Phase (line to neutral) and Line (line to line) voltages are further calculated by a
digital signal processor unit at the same 1024 samples per cycle resolution.
Specifications
Maximum voltage
±8kV peak (to Earth terminal)
Maximum continuous
voltage
1kV (to Earth terminal)
Maximum voltage
between channels
10kV
Input impedance (to
Earth terminal)
>3 MΩ
Input capacitance
< 20pF
Reference
Earth terminal