Siemens Energy & Automation, Inc.
Bellefontaine, Ohio 43311 U.S.A.
Installation Instructions
Hazardous Voltage.
Will cause death or severe
injury.
Turn off and lock out all power supplying this
device before removing cover(s) or device
and while cover(s) are removed.
Wire connector shield no. NDTS must be
installed when wire connectors TA2K8750,
TA3P8750, TA4P8500, TA2N8750,
TA3N8750, OR TA4N8500 ARE USED.
Replace all covers and shields before power
supplying this device is turned on.
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© Siemens Energy & Automation, Inc. 1990
Neutral Sensing Transformer.
An external transformer is required for circuit break-
ers equipped with ground fault protection when op-
erating in the RESIDUAL mode on 3 phase 4 wire
systems and when operating in the GROUND RE-
TURN mode on any system. The sensors listed
below must be used for these applications. The
sensor catalog number must be matched to the cir-
cuit breaker Maximum Continuous Current rating
(In) as shown in the table. Please note that sen-
sors used with other breaker types cannot be used
with the SMD/SND circuit breakers. Installation in-
structions are included with the sensors.
Transformer
Circuit
Transformer
Catalog No.
Breaker Rating
Color
N06SMDA
600 Amps
GREEN
N07SMDA
700 Amps
GREEN
N08SMDA
800 Amps
GREEN
N10SNDA
1000 Amps
GREEN
N12SNDA
1200 Amps
GREEN
Electronic Testing
Senstrip III solid state molded case circuit break-
ers may be tested for electronic functionality by
the use of a TS-31 test set available from local
Siemens sales offices.
NOTE: Time current characteristic curves and
information on factory installed accessories can
be obtained from local Siemens sales offices.
This product is covered by the following patent: 4,631,525.
Released Production, B v1, Dec 18, 1998
Released Production, C v1, Apr 18, 2011
