External Accessories
75
Neutral Sensing Transformer
1.)
Turn off power feeding this device before starting the
installation.
2.)
Also turn off any line power within the immediate vicinity
to prevent the incidental or accidental contact of tools by
the installer.
Use transformers with the following breaker frame ratings only
NO4SB
NO8SB
N12SB
N16SB
N20SB
SBA0400
SBA0800
SBA1200
SBAl60
SBA2000
SBS0400
SBS0800
SBSl200
SBS1600
SBS2000
SBH0400
SBH0800
SBH1200
SBH1600
SBH2000
Introduction
This neutral sensing transformer is designed to be mounted
on a bus bar with maximum dimensions of 3.00" x .75".
Neutral Sensing Transformer
Neutral sensing transformers are used with 4-wire residual
ground fault protection and ground source schemes.
Neutral Sensing Transformer
Mounting
Position the neutral sensor as close as possible to the asso-
ciated circuit breaker and fabricate two .312 diameter holes
1.75 inches apart in bus, as shown below. Mount the neutral
sensor to the bus as shown with 1/4-20 hardware (not
provided). Torque mounting bolts to 50 in. lbs.
maximum
.
Bus Mounting
Summary of Contents for SBA 1200
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Page 94: ...92 Outline Dimension Drawing 2000A Fixed Mounted Courtesy of NationalSwitchgear com ...
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