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Siemens Energy & Automation, Inc.
Bellefontaine, OH 43311 U.S.A.
5 of 5
Page
761411A03
Pc. No.
© Siemens Energy & Automation, Inc. 1989
Installation Instructions
RESIDUAL SETTING (OUTGOING CIRCUIT
METHOD)– This is the standard position to which
the breaker is set when shipped from the factory.
With the switch in this position the circuit breaker
may be used on 3 phase 3 wire or, with the addition
of an external neutral sensing transformer, on 3
phase 4 wire systems. See Neutral Sensing Trans-
former section for more information.
GROUND RETURN SETTING (GROUND RETURN
METHOD) – This setting may only be used for ser-
vice disconnects or separately derived systems.
With the switch in this position, the circuit breaker
may be used on 3 phase 3 wire and 3 phase 4 wire
systems. An external sensing transformer, which is
installed on the main bonding jumper, is required
for this method. See Neutral Sensing Transformer
section for more information.
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 sen-
sor catalog number must be matched to the circuit
breaker Maximum Continuous Current rating (ln) as
shown in the table. Please note that sensors used
with other breaker types cannot be used with the
SJD/SLD circuit breakers. Installation instructions
are included with the sensors.
Transformer
Catalog No.
Breaker Rating
N02SJD
200 Amps
N03SJD
300 Amps
N04SJD
400 Amps
N05SLD
500 Amps
N06SLD
600 Amps
This product is covered by one or more of the following patents: 4,631,525; 4,513,267; 4,484,164.
Circuit
Transformer
__Color__
GREEN
GREEN
GREEN
GREEN
GREEN
Electronic Testing
Sensitrip 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 in-
formation on factory installed accessories can be
obtained from local Siemens sales offices.
Maintenance
JD and LD frame circuit breakers are designed to
provide years of maintenance free service. Experi-
ence has shown that properly applied molded case
circuit breakers normally do not require mainte-
nance. However, some industrial users may choose
to establish an inspection and maintenance proce-
dure to be carried out on a regular basis. For de-
tailed information, consult applicable NEMA publi-
cation or your local Siemens sales office.
NOTE: Do not spray or allow any petroleum based
chemicals, solvents or paints to contact the molded
parts or nameplates.
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.
Replace all covers and shields
before power supplying this device
is turned on.
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