The connection rule of Electionic Load


 1.Quick Start guide for e-Load 

 WARNING

Risk of electric shock.

  • The DC LOAD conforms to IEC Safety Class I (equipment that has a Protective Con-doctor terminal). Be sure to earth ground the product to Prevent electric Shock.
  • The DC LOAD is grounded through the power cord ground wire. 
  • Connect the protective conductor terminal to earth ground.

1.1. Installation and Preparation  

  1. Turn the POWER switch off
  2. Check that the AC power line meets the nominal input rating of the DC LOAD.
  3. Connect the power cord to the AC INPUT.
  4. Check that the power cord is connected correctly.
  5. Connect the power cord plug to a properly grounded outlet.

1.2.Checking Whether the Power Is On or Off


  1. Check that the power cord is connected correctly.
  2. Check that nothing is connected to the DC INPUT (load input) terminals on the rear panels.
  3. Turn the POWER switch on .
  4. If you notice strange sounds, unusual odors, fire, or smoke around or from inside the DC Load, turn the POWER switch off, or remove the power cord plug from the outlet.
  5. Press the  side of the POWER switch to turn the power off.

1.3.Connecting to the DUT

 CAUTION
Risk of damage.
  • Do not connect the DUT to the load input terminals while the product’s load is turned on.
  • Do not invert the polarity when connecting. An overcurrent might flow when the load is turned on.
  • To avoid overheating, observe the following precaution.
  • Use the supplied screws to connect the cables with crimping terminals.

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1.4 Connecting to the load input terminals on the rear panel

 WARNING

Risk of electric shock.
  • Be sure to attach the cover for the load input terminals on the rear panel.
  1. Turn the load off.
  2. Turn off the output of the DUT.
  3. Connect the DUT to the load input terminals on the rear panel.
  4. Connect the load cables to the load input terminals on the rear panel using the included load input terminal screw set.
  5. Do not invert the polarity when connecting.
  6. Connect the positive (+) input terminal on the load generator to the high Potential output of the DUT & Load unit, and connect the negative (-) polarity input terminal on the load generator to the low Potential output of the DUT & Load unit.
  7. This completes the connections.

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1.5.Wire/Cable Guide

The following table provides a guide to the current carrying capability (ampacity) of Both Metric and AWG sizes. Metric sizes are expressed as a cross sectional areas (CSA). 

If in any doubt of a cables ampacity it is recommended that you ask your Cable supplier.

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1.6.Power ON / Off the Load and DUT 

Power ON Sequence
1.Turn the POWER switch on the Load.
2.Turn the POWER switch on the DUT.

Power OFF Sequence
1.Turn the POWER switch off the DUT.
2.Turn the POWER switch off the Load.


 2. Electronic Load testing connection 

When the Current/Watt rating exceeds the Plug-in unit rating.

Two or more Plug-in units may be parallelled to increase the power rating. Different electronic load modules （such as a 3310 and a 3320） may be parallelled together.

Delete short key of Electronic Load is recommended for parallel operation.

Prodigit strongly advises against series wiring of Electronic Loads.


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 3. Vsense and Imonitor connection 

Due to the large changes of load current will cause a voltage drop on the conductor, the Vsense input BNC is designed to compensate this condition. Prodigit 3310/3320 series Electronic Loads are equipped with Auto-Vsense capability. The DVM will measure Load input binding post when Vsense BNC to clip cable is not used. The DVM will measure the power supply output terminal voltage when Vsense cable is used, the connection diagram is shown below :


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Imonitor BNC output is used to monitor the load current flow through the Electronic Load,Imonitor output is 10V F.S for Prodigit 3310/3320 series, it is normally connected to an oscilloscop for dynamic current wave form monitor, the Imonitor signal is opto-isolated to Load input common for 3310 series Electronic Load, this can eliminate the Ground loop when connects to an oscilloscope, because the Ch1 and Ch2's common on an oscilloscope is connected(not a diffential input.
 

 4. Multipule output (both +/-) power supply testing connection 

There is a rule for connection between a multiple output power supply and a multi-channel Electronic Load: Rule: The potential of Electronic Load's positive input (Red binding post) must be higher than the Negative input （black binding post）


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The above example shows a four output power supply connects to four channel Electronic Load.



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