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winding motors can be protected, using either one
Current Monitors, by following
one of the two methods shown below and on the next page:
This method uses only one (1) Model 610
, and placing the third CT on the
phase imbalance trip point at 29% or less. The current trip level
should be the motor's FLA times 1.08 (8% about the FLA). This
method will protect against all major faults in either part winding.
This method uses two (2) Model 610 monitors by
placing one (1) CT on each power wire connected to both of the
This method provides complete coverage.
The selected trip current level, used by each Model 610, should be
(the current allowed in each part winding) times 1.08 for
To protect a 3 phase part (split) winding motor, using a single
Single 610 Part (Split) Winding Motor Installation
To protect a 3 phase part (split) winding motor, using two
610 Part (Split) Winding Motor Installation
motor contactors and motor.
Single Model 610 Part (Split) Winding Motor Wiring Diagram
Single 610 Part (Split) Winding
Motor Installation
Disconnect power from the motor(s) and ensure the motor(s)
is/are electrically disabled prior to the Model 610 Digital
Current Monitor's installation.
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