Load Box Instructions

 

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FUNCTION NAME

 

DESCRIPTION

Power

  Up (ON) - Energizes the load box
Down (OFF) - No voltage to the load box

Voltage Phase A, B, C

  Up (ON) - Energizes individual VT's
Down (OFF) - No voltage to individual VT's

Unity/Lead/Lag

  Up (Lag) - Causes a lagging phase shift (all 3 phases)
Middle (Unity) - Causes nophase shift (all 3 phases)
Down (Lead) - Causes a leading phase shift (all 3 phases)

Fuse

  120V, 0.5 amp (Normal current is >150 mA & 0.5A max)

VARIAC
(Current Adjuster)

  0 to 100% of full load. This controls the magnitude of the applied current on all 3 phases from 0 amps to the max current (approx. 10A).   Clockwise rotation increases current.

Imbalance

  Creates an imbalance between current elements.
Up - lightest
Middle - Most current (Normal)
Down - light
(example: Up - 4A, Middle - 12A, Down - 6A)

Reverse

  Down - Reverses the direction of the current in individual CT's.
Up - Not reversed (Normal)

Bypass

  Up - Removes current from individual CT's.
Down - Current goes through individual CT's. (Normal)

Removable Feet

  These feet are now easily removable for shipping.   There are 4 screwss in the feet.  They are screwed directly into the load box without any nuts or washers.  Simply use a Philips screw driver to remove these 4 screws.

Cover

  The front cover on the Load Box shouold be on when the meter is inserted into the Load Box. The cover can be removed by lifting the silver tab (it is near the socket) toward the socket and then pulling the cover away from the box.

Cable Holes

  There are two holes for cables.  There is a small hole in the back and a large hole in the top(it is normallly covered).

Safety

  UNPLUG THE LOAD BOX FROM THE 120V SOURCE BEFORE INSERTING OR REMOVING THE METER