BENSHAW RediStart EXEXMVRMX3 Series, User Manual

Page: 35 / 222

Current Transformers
3.7 Current Transformers
3.7.1 CT Mounting
If the CTs are shipped loose they need to be mounted on the power wiring. Thread the power wire through the CT and supplied sleeving,
ensuring the polarity mark is towards the line side. (The polarity marks may be a white or yellow dot, an “X” on the side of the CT, or the
white wire.) Each phase has its own CT. The CT must then be attached to the power wiring using two tie-wraps.
3.7.2 CT Polarity
The CT has a polarity that must be correct for the starter to correctly measure Watts, kW Hours, Power Factor, and for the Power and
TruTorque motor control functions to operate properly.
Each CT has a dot on one side of the flat surfaces. This dot, normally white in color, must be facing in the direction of the line.
CT1 must be on Line L1, CT2 must be on Line L2, CT3 must be on Line L3.
3.7.3 Zero Sequence Ground Fault Current Transformer
The Zero Sequence Ground Fault CT can be installed over the three phase conductors for sensitive ground current detection or for use
with high resistance grounded systems.
25
3 - INSTALLATION
Figure 7: BICT 2000/1-6 Mechanical Dimensions