Currents
As mentioned previously, after you have Plugged in your Current Probes it will be automatically
recognized. Therefore, only minor configuration adjustments will need to be made in the Current
Configuration Window. Elspec supplies a complete range of Clamps with the Portable BLACKBOX
that are divided into two categories: Custom Clamps & all other Clamps - See Optional
Accessories.
The Custom clamps are capable of measuring currents up to 3000 Amps at very high frequencies of
10 kHz. The probes provide a linear voltage output replicating input current waveform ranges of
either 30, 300, or 3000 Amperes. The Ampere setting is controlled & set by the user via a Rotary-
Switch. Due to the nature of this setting, the Hardware range needs to be configured accordingly in
the unit's Web Interface. As such, the configurations differ for the two different groups of Clamps -
Currents Configuration - Elspec Custom Clamps:
Access your Portable BLACKBOX Unit via Elspec's Web Interface log on as the
Administrator under Configuration Device Setup select the Currents Tab:
As mentioned all the connected clamps will be automatically recognized. Adjust the Currents
Probe Info in the applicable sections:
Primary & Secondary Transformation Ratios for all the Current channels;
Nominal Ampere Values for all the Current Channels (Nominal is set for the current
measurements that will define PQZIP threshold / tolerance value & it is also used for event
settings);
Either Reverse the Polarity / maintain it at Normal from the drop-down selection (Polarity
toggling is used to correct incorrect wiring);
Clamp’s Current / Voltage Ratio as per the Clamp's Rotary Current Setting - use the table
below as your guide:
CLAMP ROTARY CURRENT SETTING
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