16
Accessories
INSTALLATION AND OPERATION INSTRUCTIONS
MN280103EN March 2023 www.eaton.com
Figure 13 . Site-ready with wildlife guards
Figure 14 . Wildlife guard unlatched around
the top bushing skirt
Figure 15 . Top wildlife guard latched around
the top bushing skirt
Integrated voltage sensor option (6 sensors)
The NOVA NX-STS recloser is available with integrated
voltage sensors for source- and load-side voltage sensing.
This is accomplished by using a high-voltage resistor
encapsulated within each interrupter module for source-
side voltage sensing, and a load-side resistive sensor
encapsulated in silicone rubber insulation connected to the
recloser’s load-side terminal. The integrated voltage sensors
and recloser control system support a voltage-sensing
magnitude accuracy of ±2% and a phase-degree accuracy
of ±1.5° over the full rated ambient temperature range
of the recloser and control. The accuracy for this system
applies when the following conditions are met:
•
Voltage range is greater than 50% to 100% of the rated
maximum voltage of the recloser
•
Ratio of load-to-source voltage magnitudes is between
0.5 and 2.0, inclusive
•
Phase angle difference between load and source voltages
is no greater than 30 degrees
The load-side voltage sensor can be installed at the factory,
or can be installed in the field as a service kit. When
installed, the load-side top terminal is connected to the
recloser load-side terminal, and the end of the sensor is
securely connected to the recloser head casting. The load-
side sensor connections are made within the recloser tank.
A single 37-pin control cable is used to bring source and load
voltages to the Form 7 control, in conjunction with other
control cable signals including TRIP and CLOSE, recloser
status, and current values. The control cable uses Eaton’s
MIL-DTL-38999 Series IV twist-lock cable connector design.
