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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.

Page 

2 of 6

2. For applications where mounting is on a flat

surface of the equipment, drill and tap
mounting bolt holes as shown in Fig. 2. For
handle escutcheon cutout, refer to Fig. 3.

3. Ensure that any internal breaker accessory

terminals can be properly connected with the
circuit breaker in the mounted position.

4. Position the circuit breaker in the mounting

location, install the mounting hardware and
tighten securely.

5. Connect the line and load terminals and

torque using the values shown on the circuit
breaker nameplate.

6. Connect all accessory terminals, if present.

7. Check all mounting hardware for secureness.

Check wire connectors for correct torque
requirements.

Manual Operation

Manual operation of the device is controlled by the
circuit breaker handle and the PUSH-TO-TRIP
button. The device handle has three indicating posi-
tions, two of which are molded into the handle to in-
dicate ON and OFF. The third position indicates a
TRIP position and is between ON and OFF positions.
(See Fig. 4)

A. Device Reset

After tripping, the device is reset by moving the
device handle to the reset position and then mov-
ing the handle to the ON position.

B. The PUSH-TO-TRIP Button

The PUSH-TO-TRIP button checks the tripping
function and is used to manually exercise the op-
erating mechanism.

DRILL AND  TAP
3/8 - 16 HOLE
(4 PLACES)

C

L

OF HANDLE

14.25

6.28

1.50

3.00

3.75

1.87

4.87

2.43

2.62

3.87

7.75

Fig. 2

Fig. 3

OF HANDLE

OF HANDLE

Released Production, B v1, Dec 18, 1998

Released Production, C v1, Apr 18, 2011

Summary of Contents for SMD6

Page 1: ...nectors Mounted hardware and unmounted wire connec tors where required are available as separate cata log items Circuit Breaker Preparation A Before installing or servicing the breaker turn off and lock out all power to prevent incidental or accidental contact B Make sure that the device is suitable for the in stallation by comparing nameplate ratings with system requirements Inspect the device fo...

Page 2: ...n securely 5 Connect the line and load terminals and torque using the values shown on the circuit breaker nameplate 6 Connect all accessory terminals if present 7 Check all mounting hardware for secureness Check wire connectors for correct torque requirements Manual Operation Manual operation of the device is controlled by the circuit breaker handle and the PUSH TO TRIP button The device handle ha...

Page 3: ...rame devices are designed to provide years of maintenance free service Sensitrip III Solid State Molded Case circuit breakers may be tested for electronic functionality by the use of TS 31 test set available from local Siemens sales offices Maintenance Experience has shown that properly applied molded case circuit breakers normally do not require main tenance However some industrial users may choo...

Page 4: ...es the continuous amps setting The dia gram below illustrates the possible settings for this switch Short Time Pickup xIr Long Time Delay 6xIr The adjustable long time delay switch allows for se lection of long time delays based on I2 t curves at six time the continuous amps setting Ir The dia gram below illustrates the possible settings for this switch Continuous Amps Ir In Long Time Delay Secs 6...

Page 5: ...fault option has two modes of opera tion The mode is set by a switch on the bottom of the trip unit with the settings identified as RESIDUAL and GROUND RETURN See Fig 4 for switch lo cation RESIDUAL MODE OUTGOING CIRCUIT METHOD This is the standard position that the breaker is set to when shipped from the factory With the switch in this position the circuit breaker may be used on 3 phase 3 wire or...

Page 6: ... 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 Rati...

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