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External Accessories

Neutral Sensing Transformer

Important

The SB series of electronic trip circuit breakers equipped with
ground fault protection may be used in the Residual or Ground
Return modes. When used in the Residual mode the orienta-
tion of the neutral sensing transformer is important for proper
operation. See illustrations below for proper orientation of the
neutral sensor for Residual mode Ground Fault. Orientation of
the neutral sensor is not required when used in the Ground
Return mode of Ground Fault.

Standard Connection

Reverse Connection

Installation of neutral transformer

Terminal Connections

After properly orienting and mounting the neutral sensing
transformer, maintain the correct polarity by connecting ter-
minal LT1 1 on the circuit breaker to terminal X1 on the neutral
sensor, and terminal LT12 on circuit breaker to terminal X2 on
the neutral sensor.

Trip Unit Connections

Check to see if there are wires routed from terminal block
positions LT1 1 and LT12 to the inside of circuit breaker. If
there are, discard the 2 connection wires supplied with the
transformer. If not, these wires will need to be installed.
Remove breaker front cover and trip unit (see pages 36-37 of
guide). Follow steps 2 and 3 on page 54. With a small
screwdriver, press in tab on right side of 36 pin trip unit
connector and release it from mounting bracket. Connect the
wire marked LT11 from trip unit connector position #8 to
terminal block position LT11. Connect wire marked LT12 from
connector position #15 to terminal block position LT12. Make
sure these connectors are fully seated and locked into con-
nector. Route wires as shown below. Use number 1 8-gauge
copper wire (to be supplied by customer) for lead wires .
Replace trip unit and front cover taking care not to pinch any
wires.

Courtesy of NationalSwitchgear.com

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Содержание SBA 1200

Страница 1: ...Manual No SG SB Encased Systems Breakers 400 2000 Ampere Frame Ratings Information and Instruction Guide Courtesy of NationalSwitchgear com ...

Страница 2: ...to de energize clear ground and tag circuits and equipment in accordance with established safety practices b is trained in the proper care and use of protective equipment such as rubber gloves hard hat safety glasses or face shields flash clothing etc in accordance with established safety practices c is trained in rendering first aid SUMMARY These instructions do not purport to cover all details o...

Страница 3: ...nlocked Position 22 Unlocked to Test Position 23 Test to Connected Positions 24 Connected to Test Position 25 Test to Unlocked Position 26 Rotating the Moveable Drawout Element 27 Part Three Monitoring the Electronic Trip Unit 28 35 Page Internal Accessories Preliminary Installation Procedures 36 37 Electric Motor Operator 38 47 Local Electric Close 47 Remote Close Assembly 48 51 Auxiliary Switche...

Страница 4: ...pplications for SB breakers include main tie feeder and emergency source breakers in industrial plants large com mercial complexes and medical and health care facilities The circuit breakers are constructed for either fixed or drawout installation They can be physically grouped in central distribution switchboards or used separately in stand alone applications The SB breaker is equipped with a two...

Страница 5: ... the SB breaker is specified on the front cover label and is further identified by the use of a color bar at the top left of the breaker label Blue indicates the alternate or the lowest interrupting category Black indi cates the standard or middle interrupting rating A Red label indicates the highest available interrupting rating for the SB breaker Overcurrent Protection Configurations Siemens Ele...

Страница 6: ...g capacity within a smaller size than could have been achieved by more conventional con struction The electrical insulation property of the thermoset material enhances the safety of operation The insulated case physically isolates and electrically insulates the user from the internal high voltage contacts The arc chambers and main contact structure are encased in the back compartment The trip unit...

Страница 7: ...s compact packaging is made possible by the insulated encased construction and thermal performance of the SB breaker Even when operated at 100 of the frame rating no additional ventilation is required for the 800A 1200A and 2000A frames Detailed outline drawings of the breakers and drawout elements are included in the Outline Dimensions section pages 82 93 Example Six 800A Siemens SB Encased Syste...

Страница 8: ...clearly display the opened or closed status of the circuit breaker and charged or discharged status of the stored energy mecha nism Once the breaker is closed the mechanism can be re charged The breaker is now prepared for a rapid open close or open close open operation Centralized Controls The manual charging handle pushbutton control switches and color coded indicators are grouped in the central...

Страница 9: ...echanism The moveable drawout element can be easily pulled between the unlocked position and the withdrawn position A color coded indicator displays the position of the moveable drawout element In addition to the integral pump handle two levers are used to control the movement of the moveable drawout element A single interlock lever automatically locks the moveable drawout element when it reaches ...

Страница 10: ...Optional protection configurations are Protection Configuration Identifier Long Time Short Time LS Long Time Instantaneous LI Long Time Short Time Instantaneous LSI Long Time Short Time Ground Fault LSG Long Time Instantaneous Ground Fault LIG Long Time Short Time Instantaneous Ground Fault LSIG As standard features the trip unit has two built in test functions and a fault identification function ...

Страница 11: ...lace Depending upon the installation scheme it may be necessary to remove the tie wraps on the extension rails just prior to securing the stationary drawout element in the switchboard If the stationary drawout element is secured to a pallet remove the securing device If the preferred rear mounting surface is to be used see Outline Dimension Drawings section remove the eight 8 3 a 16 bus support bo...

Страница 12: ... Drawout Element Preferred Lifting Arrangement Attach the lifting device accessory as illustrated If lifting straps are used instead of the lifting device accessory the lifting straps should go between the primary contacts In either of these arrangements the moveable drawout element may be balanced as it is being lifted by a crane or hoist The moveable drawout element should not be lifted by the p...

Страница 13: ...tion The outline drawing for the 800A and 1200A frame is located on pages 90 91 The outline drawing for the 2000A frame is located on pages 92 93 The locations of the mounting holes and the recommended screws are depicted on the drawing All four mounting screws will be used to secure the breaker to the switchboard Carefully uncrate the breaker and remove all packing mate rial The keys for a breake...

Страница 14: ...t be removed This is done by removing the four 4 recessed Phillips head screws in positions 2 3 6 and 7 and the four 4 Phillips head screws in positions 1 4 5 and 8 that hold the front cover in place NOTE For more complete information on other stan dard and optional features of the Electronic Trip Unit see Siemens Electronic Trip Unit for Type SB Circuit Breakers Information and Instruction Guide ...

Страница 15: ...cannot be aligned with the pins the trip unit cannot be installed in the SB breaker If there is any doubt about a trip unit being the proper trip unit for a breaker hold the trip unit upside down and check the alignment of the pins and holes 5 Check for proper pin alignment 6 Lower trip unit onto support plate After the connector has been mated lower push the trip unit onto the support plate The p...

Страница 16: ...cur Check to see that the breaker is open before inserting or removing a rating plug The breaker should always be in the open position when there is not a rating plug in the trip unit 1 Remove the trip unit screws that hold the transparent cover The rating plug and adjustments on the front panel of the trip unit are protected by a transparent cover Prior to installing a rating plug or setting the ...

Страница 17: ...ing the need for screws or latches To remove a rating plug squeeze the clips and pull the plug from the plug receptacle Since the plug is held in place by compression some force will be required to remove the plug Do not close the breaker with the rating plug removed from the trip unit 5 To replace the cover bow slightly in the middle and snap into place After the rating plug has been inserted and...

Страница 18: ... should be familiar with the test and monitoring functions presented in Part Three Operating instructions for the accessories are presented in the Accessories Section Part One Operating the SB Encased Systems Breaker Operating the SB Breaker The SB breaker controls and charging handle for the stored energy mechanism are located in the central escutcheon of the front panel Standard controls are Pus...

Страница 19: ...to fully charge the stored energy mecha nism When the stored energy mechanism is fully charged the charging handle will be restrained by an internal stop and the Spring Charged Spring Discharged indicator will point to Spring Charged The charging handle will return to the stowed position when released If an optional electric motor operator is employed the electric operator will automatically recha...

Страница 20: ...ting the SB Encased Systems Breaker Discharging energy in the stored energy mechanism Closing the SB Breaker Locally Before the breaker can be closed the stored energy mecha nism must be fully charged and all of the closing prevention devices and accessories must be in the non inhibiting state or position In this condition all that is required to close the breaker is to push the Close pushbutton W...

Страница 21: ...tion The unlocked position is a transition position between the test Part Two Manipulating the Moveable Drawout Element position and the withdrawn position Physically the unlocked position and test position are the same However in the unlocked position the moveable drawout element is disen gaged from the interlock mechanism The breaker should not be tested when the moveable drawout element is in t...

Страница 22: ... out neutral and racking in When the lever is in the racking out position pulled all the way out the moveable drawout element may be racked from the connected position to the test position and from the test position to the unlocked position When the lever is set in the neutralposition located midway between the racking in and racking out positions the racking pump handle is disengaged from the rac...

Страница 23: ...veable drawout element is being racked from one position to another position the indicator will display the more critical position The connected position is defined to be more critical than the test position and the test position to be more critical than the unlocked position This means that when racking the moveable drawout element from the connected position to the test position the indicator wi...

Страница 24: ...oveable drawout ele ment moves into the unlocked position When the moveable drawout element is in the unlocked position the pointer on the position indicator will point to the unlocked symbol To move the moveable drawout element from the unlocked position to the fully withdrawn position pull the moveable drawout element outward until the extension rails are fully extended Part Two Manipulating the...

Страница 25: ... racking in position 2 Pull the interlock lever down to the interlock disengaged position Illustrated beneath padlock device If the breaker contacts are closed pulling the interlock lever down will trip the beaker 3 Pump the racking pump handle until the moveable drawout element has reached the test position 4 When the moveable drawout element reaches the test position the interlock lever will aut...

Страница 26: ...are closed pulling the interlock lever down will trip the breaker 3 Pump the racking pump handle until the moveable drawout element is in the connected position 4 As soon as the moveable drawout elements racked from the test position the position indicator will display that the moveable drawout element is in the connected position However the moveable drawout element will not be completely in the ...

Страница 27: ...terlock lever down to the interlock disengaged position Illustrated beneath padlock device If the breaker contacts are closed pulling the interlock lever down will trip the breaker 3 Pump the racking pump handle until the moveable drawout element is in the test position 4 When the moveable drawout element reaches the test position the interlock lever will automatically return to the interlock enga...

Страница 28: ...he directional shift lever to the racking out position 2 Pull the interlock lever down to the interlock disengaged position Illustrated beneath padlock device If the breaker contacts are closed pulling the interlock lever down will trip the breaker 3 Pump the racking pump handle until the moveable drawout element is in the unlocked position 4 When the moveable drawout element reaches the un locked...

Страница 29: ...nt to the fully with drawn position holding the moveable drawout element as depicted above 2 Note the depressions at the end of the extension rails As the moveable drawout element is rotated the ends of the support brackets will rest in these depressions preventing the moveable drawout element from sliding on the extension rails 3 Rotate the moveable drawout element forward to the de sired positio...

Страница 30: ...ition Therefore Siemens recommends that all adjust ment changes be made with the breaker open To set an adjustment place a slotted screwdriver onto the point to point adjustment switch and rotate the switch to the desired setting The figure on the following page describes the region of the time current curve that is being effected by each adjustment For complete information on setting the individu...

Страница 31: ...Operations Fault Protection Adjustments 29 Trip Unit Current Shaping Adjustments This curve is for illustration purposes only Courtesy of NationalSwitchgear com ...

Страница 32: ...90 95 and 100 of the rating plug value Ir Continuous Operating Current Adjustable Long Time Delay The Long Time Pickup is nominally set at 115 percent of the continuous amps setting The Long Time Delay adjustment is used to set the tripping delay of the SB breaker based on the magnitude of the overcurrent condition On Siemens Elec tronic Trip Units the long time delay which is an inverse 12 t ramp...

Страница 33: ...fore responding to the current value selected on the Short Time Pickup adjustment There are two modes of operation of this adjustment on all Siemens Electronic Trip Units one is a fixed delay the other is an inverse 12 t ramp delay The 12 t Delay has the characteristic of being inversely proportional to the square of the magnitude of the overcurrent condition This means that higher overcurrent con...

Страница 34: ...antaneous override function has been provided It is set nominally at the short time rating of the respective breaker frame size This allows the breaker to ride through high faults up to its short time capability however it is self protecting above these values Breaker Frame Size Short Time kA Rating 500 seconds max 800A 1200A 2000A 25 25 35 Discriminator Circuit Making Current Release This circuit...

Страница 35: ...ode the Ground Fault Delay may be set to 1 2 3 4 or 5 seconds In the inverse I2 t ramp delay mode the delay may be set to a calibrated value of 1 2 3 4 or 5 seconds at a current equal to 0 5 times the frame ampere rating In The inverse I2 t ramp delay reverts to a fixed delay of the same value when the ground current Ig exceeds 50 percent of the frame rating In Ground Fault Memory Circuit All Siem...

Страница 36: ... fault current returns viaa path other than the neutral Therefore the vector sum of the phase currents no longer equals the neutral current This current differential is detected by the trip unit and used in the execution of the ground fault protection function Source Ground In this scheme the phase currents are not used in detecting and processing ground faults The trip unit executes the ground fa...

Страница 37: ...nt The integral test function enables the user to exercise the trip unit electronics the magnetic latch and the breaker mecha nism The purpose of the integral test function is to provide the user an easy means to conduct a go no go type test before bringing the breaker on line After the breaker has been brought on line it may be used during routine inspec tion and maintenance Both phase fault curr...

Страница 38: ...ssory installation procedures outlined in this booklet are general by nature and may not contain the latest up to date information for complete installation Therefore it is Siemens recommendation that all accessories be installed utilizing the instruction information accompanying the accessory 1 Prior to cover removal check to be sure the circuit breaker main contacts are open and the closing spri...

Страница 39: ...d screws at the corners and the 4 head screws in recesses in cover 4 Remove cover 5 Remove the trip unit if installed by removing trip unit retaining screw 6a Slide the trip unit up to clear the support bracket pins b Remove the trip unit by pulling the trip unit away from the trip unit plug Courtesy of NationalSwitchgear com ...

Страница 40: ...ront of the breaker Components required to access or activate an accessory such as a switch or indicator at a remote location are assumed to be user supplied unless otherwise stated Group One Internal Accessories Secondary connections to remote locations are made to secondary disconnects on drawout breakers and to con trol terminal blocks on fixed mounted breakers The terminal points for all inter...

Страница 41: ... pin from each side 3 Rotate the bar caps upward 4 Lift out the crankshaft assembly Rotating the crank shaft back and forth will make removal easier 5 Remove the left and or right mechanism assemblies as required by removing two 2 5 6 bolts and nuts on each side Re installation of Left and Right Drawout Mechanism Assemblies 1 Attach the left and or right mechanism assemblies to the breaker using t...

Страница 42: ...tall the bar cap pins through the bar caps and left and right mechanism assemblies with the head of the pins toward the center of the breaker 6 Install an E ring on each bar cap pin 7 Complete steps 1 to 4 on pages 23 26 to verify the lock bar is in the proper position It should be necessary to pull the interlock lever down before racking the drawout and the lever should return to the engaged posi...

Страница 43: ... other components of the electric operator are installed on the left side The motor fuse is accessible from the front panel The principal components of the electric operator are a charging motor motor controller gear box cam mecha nism closing solenoid motor fuse and check switches to monitor the positions of the mechanical components The charging motor gear box and cam mechanism are inte grated i...

Страница 44: ...the Handle Check Switch from the Solenoid Bracket Mount the Remote Close Solenoid to the mechanism plate Make sure that the Solenoid Plunger is seated inside the Solenoid Secure the assembly with the 6 32 x l 4 screw torque to 9 10 in lbs and 10 32 x 3 8 screw torque to 25 32 in lbs Reattach the Handle Check Switch to the Solenoid Bracket with the 4 40 x l 2 screws torque to 4 6 in lbs NOTE If the...

Страница 45: ...o 9 11 in Ibs Check adjustment after tightening screws and read just if necessary 8 Plug J1 6 and J1 7 Connectors into the Connector Strip until latch tabs snap into slots Gently pull wires to ensure they are latched into the Connector Strip 9 Install the Electric Motor Controller ECMC Assembly to the Motor Operator Assembly with the four 6 32 x l 4 screws and 6 lockwwashers Torque screws to 9 11 ...

Страница 46: ...ssembly Make sure to install the Insulator between the Switch and metal bracket Secure the assembly with the two 4 40 x 1 2 screws Torque screws to 4 6 in lbs Check to be sure the Actuator fits into the slot in the push link and does not bind 12 Route the two wires attached to the B Switch from the right side of the breaker to the left side of the breaker The wires need to be fed under the mechani...

Страница 47: ...it by replacing the mounting screw Torque screw to 6 8 in lbs 18 Before replacing the breaker cover remove the fuse hole plug from the inside of the cover as illustrated above Also cut out the Fuse not installed area of the rating label 19 Replace front cover being careful not to pinch the wires that are routed to the secondary disconnects or terminal block 20 Replace the 4 10 Phillips head screws...

Страница 48: ...r AC ECMC Assembly 7 Electric Operator Label 8 B Switch Assembly Motor Operator 9 10 32 UNC 2B x 1 4 PHMS 10 10 32 UNC 2B x 3 8 PHMS 11 6 32 UNC 2B x 1 4 PHMS 12 4 40 UNC 2B x 1 2 PHMS 13 6 Lockwasher 14 6 32 UNC 2B x 1 4 PHMS 15 6 32 UNC 2B x 1 4 Type F CPHS 16 Cable Tie 17 Local Close Switch Assembly 18 Wire Tie Adhesive Mounting Base Courtesy of NationalSwitchgear com ...

Страница 49: ...ith either the electric operator or remote closing solenoid The local electric close is commonly used in conjunction with a manual close blocking device see Closing Blocking Device page 68 The electric close pushbutton switch is installed in the center escutcheon of the front panel directly below the push to close button switch The Local Electric Close accessory is not field installable Electric M...

Страница 50: ...slide the solenoid over the solenoid plunger Figure 1 Remote Close Assembly 3 Attach the remote close assembly to the mechanism plate using the 2 10 screws provided The assembly is aligned by a set out in the mechanism plate that fits in a hole in the remote close bracket Note Torque screws to 24 32 in Ibs 4 Align remote close link with solenoid and tighten set screw see TOP VIEW Detail in Figure ...

Страница 51: ...ure that the switch lever is inside the top cavity of the pusher link See Figure 4 10 Make sure that the switch lever rests on the pusher link when the breaker main contacts are open See Figure 4 Place insulator between B switch and bracket Secure that B Switch with the 2 4 screws provided Note Torque screws to 5 6 in Ibs 11 Route wires from B switch See Figure 5 Route wires beneath mechanism plat...

Страница 52: ...ing it onto the plug Slide the trip unit over the bracket pins Secure the trip unit by replacing the mounting screws Torque screw to 6 8 in Ibs 15 Apply remote close accessory label to side of the breaker cover Mark label on the opposite side of the cover to indicate that the remote close has been in stalled Figure 6 Wire Routing Assembly Left Side Courtesy of NationalSwitchgear com ...

Страница 53: ...cover screws to 28 32 in lbs Torque 1 4 cover screws to 68 75 in lbs 17 For fixed mounted breakers connect the insulated termi nals to the proper terminal block locations For drawout breakers follow steps 18 and 19 18 Route wires through the hole in the drawout movable element Figures 7 19 Connect the insulated terminals to the proper secondary disconnect locations See Figure 7 Figure 7 Courtesy o...

Страница 54: ...ches should be installed prior to the SB breaker being installed in the switchboard Before starting the installation the breaker should be in the open position and the stored energy mechanism should be dis charged A drawout constructed SB breaker already in stalled in the switchboard should be placed in the fully withdrawn position to allow access to the secondary discon nects The auxiliary switch...

Страница 55: ... trip unit top is not secured properly the interlock will prohibit closing of the breaker 6 Replace the front cover of the breaker being careful not to pinch wire leads routed to secondary disconnects or terminalblocks Securewitheight 8 Phillipsheadscrews Installation of the auxiliary switch is complete Wiring Information Courtesy of NationalSwitchgear com ...

Страница 56: ...iring The trip solenoid is installed on the right side of the front compartment behind the trip unit and beneath the reset plate Notes 1 Wire markings are shown in brackets like this 2 LT indicates left top terminal block or secondary con nector If practical the UVR should be installed prior to the SB breaker being installed in the switchboard Before starting the instal lation the breaker should b...

Страница 57: ...ch wire leads routed to secondary disconnects or terminal block Secure with eight 8 Phillips head screws Installation of the undervoltage release accessory is complete Undervoltage Release Ratings Catalog Number Hold in Current Amperes Operating Voltage SBUV12 SBUV24 SBUV48 SBUV125 12 06 03 02 12V dc 24V dc 48V dc 125V dc SBUV120 SBUV240 SBUV480 SBUV600 02 02 02 02 120V ac 240V ac 480V ac 600V ac ...

Страница 58: ... from the shunt trip assembly Be careful not to drop and damage the plunger 2 Align the shunt trip solenoid on the reset mechanism Make sure that the secondary latch is positioned inside the groove of the solenoid plunger See Figure 1 3 Secure the shunt trip solenoid with the tow 6 32 SEMS screws provided See Figure 1 Note Torque screws to 18 20 in Ibs 4 Check the plunger for binding after the scr...

Страница 59: ... unit and breaker front cover being careful not to pinch wire leads routed to secondary disconnects or terminal block See Figure 6 11 Apply the shunt trip accessory label to side of the breaker cover see Figure 7 Mark the label that is on the opposite side of the cover to indicate that the shunt trip has been installed Shunt Trip Ratings Catalog Number In Rush Current Amperes Operating Voltage SBS...

Страница 60: ...e bell alarm contact is a latching type and remote reset capability is provided To install the bell alarm first remove the breaker front cover and trip unit if previously installed see page 37 1 With a small screwdriver press in tab on right side of 36 pintripunitconnectorandreleasefrommountingbracket 2 Connect bell alarm lead wires 1 and 22 to corre sponding numbered holes in pin connector Note I...

Страница 61: ...Internal Accessories 59 Electronic Bell Alarm Electronic Bell Alarm or Display Module Relay Schematic Drawing only 1 device per breaker Courtesy of NationalSwitchgear com ...

Страница 62: ...allation procedures are outlined on pages 36 37 NOTE To properly use the Siemens Remote Indicator Panel the SB Circuit Breaker Trip Unit must be removed See Instructions Pages 36 37 if previously installed 1 With a small screwdriver press in tab on right side of 36 pintripunitconnectorandreleasefrommountingbracket 2 Connect the wires provided between the trip unit 36 pin connector and the External...

Страница 63: ...ws Hold unit in location desired Mark and drill 4 holes for 6 screws Mount Remote Indicator Panel with 4 6 Screws Not Supplied Wiring Note that these terminal blocks are removable for ease of wiring Pull them straight out to unplug insert wires and tighten screws then plug them back into circuit board Wire Remote Indicator Panel to circuit breaker using terminals on left side marked LB4 LB8 Connec...

Страница 64: ...the Module located in the Trip Unit This could be either a Display Module or a Ground Fault Monitor Module When the current exceeds the switch setting relay M A pulls in and it drops out when the current goes below the switch setting 62 Internal Accessories Remote Indicator Panel Ground Fault Sensing and Relaying System When used with a Ground Fault Monitor Module Cat No SBGFM the Remote Indicator...

Страница 65: ...thatiftheGroundFaultMonitorisremovedwhilethe circuit breaker is powered up the alarm line will be set to its ON state NOTE Option for Ground Fault Detection and Alarm without tripping in accordance with NEC Article 700 Section 700 26 is available Consult Siemens Sales Office for further information Ground Fault Monitor and Display Module Display Module The Display Module provides features for allo...

Страница 66: ...y Module Relay or Remote Indicator Panel For a system completely enclosed within the breaker case the internally mounted Display Mod ule Relay is used If remote cause of trip information is required the Remote Indicator Panel may be used in place of the Display Module Relay Ground Fault Relaying System System Operation The user must first set the desired ground fault pickup and delay settings on t...

Страница 67: ...hest setting Set the Ground Fault Monitor to the LO pickup on the 1 second delay band Using a low voltage current source apply a test current equal to 50 of the rating plug value The circuit breaker must not trip Reduce the test current to zero Using a suitable means short the X1 wire and the X2 wire connections together on the Neutral Sensor Reapply a test current equal to 50 of the rating plug v...

Страница 68: ...66 External Accessories Ground Fault Sensing and Relaying Courtesy of NationalSwitchgear com ...

Страница 69: ... keep the other breaker in the open tripped position The interlock device is available for fixed mounted breakers installed side by side or in the same verti cal section On drawout configured breakers the interlock device is available for breakers installed in adjacent cubicles either vertically or horizontally The mechanical interlock device is not field installable Mechanical Interlock Padlock D...

Страница 70: ...Blocking Devices Drawout padlock device kit Padlock device is installed above the interlock lever Closing Blocking Device on SB Breaker A closing blocking device is used to prevent local closing of the breaker under normal operating conditions The device is a cover that mounts over the push to close pushbutton block ing normal access to this switch A small hole in the center of the cover provides ...

Страница 71: ... moveable draw out element is in the connected position A maximum of four A and B cell switches may be installed in a breaker The switch contact ratings are given in the following table Switch Contact Ratings Supply Voltage Ampere Rating 120 VAC 240 VAC 480 VAC 24 VDC 125 VDC 10 Amps 10 Amps 6 Amps 3 Amps 0 6 Amps The cell switches are installed on the left rear flange of the stationary drawout el...

Страница 72: ... withdrawn to the unlocked posi tion The drawout safety shutters kit consists of two shutter assem blies and mounting hardware The shutters are symmetrical so that either shutter can be used to cover the line or load stabs The shutters are installed on the sides of the stationary drawout If practical the drawout safety shutters should be installed prior to the stationary drawout element being inst...

Страница 73: ... sides of the stationary drawout element 6 Install shutter springs zinc silver spring is used for the top shutter white springs are used for the bottom shutter Installation of the bottom shutter is similar to the top 7 Push down on the top shutter and pull up on the bottom shutter to ensure that they will move freely in the tracks 8 Drawout Safety Shutters shown installed 9 Install terminal blocks...

Страница 74: ...d Secondary Disconnects terminal points Control Terminal Block mounted on fixed mounted breaker Control Terminal Blocks Control terminal blocks provide electrical access to the inter nal accessories and trip unit of a fixed mounted breaker A breaker can be equipped with up to four control terminal blocks each with 12 terminal points The terminal blocks accept 12 AWG user wiring They are rated for ...

Страница 75: ...d the A block is at the bottom These are also reversed on the left side A at the top B at the bottom The blocks and drawout elements are keyed to prevent improper installation Disconnects should be affixed to stationary and moveable drawout elements prior to racking in the moveable element The secondary disconnects are attached with screws to the stationary and moveable drawout elements Secondary ...

Страница 76: ... the pressure wire connectors 1 Attach the power cables to the connectors and tighten the set screws Use the recommended torque supplied with the terminal connector 2 Mount the connectors to the terminal pads with the mounting bolts Use torque value supplied with the terminal connector T Connectors T connectors are used to connect power buses to the SB breakers The connectors are rotatable to allo...

Страница 77: ...H1200 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 breake...

Страница 78: ... and terminal LT12 on circuit breaker to terminal X2 on the neutral sensor Trip Unit Connections Check to see if there are wires routed from terminal block positions LT1 1 and LT12 to the inside of circuit breaker If there are discard the 2 connection wires supplied with the transformer If not these wires will need to be installed Remove breaker front cover and trip unit see pages 36 37 of guide F...

Страница 79: ...or crane to lift a moveable drawout element Provisions are provided on the drawout elements to attach a lifting device The attach ment location allows the elements to be balanced as they are being lifted and installed The instructions for attaching the lifting devices are contained in the Installation Instructions section Lifting Device Bracket Connecting point of the lifting device Lifting the Mo...

Страница 80: ...ing Instructions section The auxiliary power supply operates from 120V ac source power Auxiliary Power Supply Test Procedures 1 To test trip unit plug Auxiliary Power Module APM into front of trip unit 2 Hold down Power button on this Auxiliary Power Module andthedesiredtestbuttonsonthetripunit Notethatonly the Power button must be held down for the duration of the test sequence If Power button is...

Страница 81: ...and then press ENTER Entry of erroneous data in the above steps will result in false tests and results F After entering the breaker switch settings you must select the test you wish to have performed Enter test L Long S Short I Inst G Gnd Fault C CT Cont L Long time or overload test S Short time test I Instantaneous test G Ground fault test C Current transformer continuity test G If you press ENTE...

Страница 82: ... ENTER to Continue or A to abort Universal Test Kit TS 31 andthenforthephasetotest Amessagewillthenappear stating the test results For example CT Resistance Test Phase X PASSED Press any key to continue M There are additional ERROR messages which may ap pear on the display during this operation which were not covered previously Test Not Running Check Test Cable Press enter to continue The test set...

Страница 83: ...front of the breaker while guiding the rubber inserts into the holes located in the breaker cover See Figure 1 3 Secure the dead front shield by tightening the two 2 screws provided Note Approximately ten 10 complete rotations of the screws will secure the dead front shield Dead Front Shield Figure 1 4 Check the dead front shield to insure that it is properly secured Tighten screws more if the dea...

Страница 84: ...82 Outline Dimension Drawing 800A Stationary Drawout Element 1200A Stationary Drawout Element Courtesy of NationalSwitchgear com ...

Страница 85: ...Outline Dimension Drawing 83 800A Stationary Drawout Element 1200A Stationary Drawout Element Courtesy of NationalSwitchgear com ...

Страница 86: ...84 Outline Dimension Drawing 800A Moveable Drawout Element 1200A Moveable Drawout Element Courtesy of NationalSwitchgear com ...

Страница 87: ...85 Outline Dimension Drawing 800A Moveable Drawout Element 1200A Moveable Drawout Element Courtesy of NationalSwitchgear com ...

Страница 88: ...86 Outline Dimension Drawing 2000A Stationary Drawout Element Courtesy of NationalSwitchgear com ...

Страница 89: ...87 Outline Dimension Drawing 2000A Stationary Drawout Element Courtesy of NationalSwitchgear com ...

Страница 90: ...88 Outline Dimension Drawing 2000A Moveable Drawout Element Courtesy of NationalSwitchgear com ...

Страница 91: ...89 Outline Dimension Drawing 2000A Moveable Drawout Element Courtesy of NationalSwitchgear com ...

Страница 92: ...90 Outline Dimension Drawing 800A Fixed Mounted 1200A Fixed Mounted Courtesy of NationalSwitchgear com ...

Страница 93: ...91 Outline Dimension Drawing 800A Fixed Mounted 1200A Fixed Mounted Courtesy of NationalSwitchgear com ...

Страница 94: ...92 Outline Dimension Drawing 2000A Fixed Mounted Courtesy of NationalSwitchgear com ...

Страница 95: ...93 Outline Dimension Drawing 2000A Fixed Mounted Courtesy of NationalSwitchgear com ...

Страница 96: ...BS08DFH SBS08DFH SBS12DFH SBS20DFH SBS20DFH Type SB Encased Systems Breaker Frames High Interrupting Rating To 200 A l R kA Breaker Type Fixed Mounted Catalog Number Drawout Breaker with Moveable Mechanism Stationary Drawout Mechanism Ampere Rating Frame Size Vertical Bus Catalog Number Horizontal Bus Catalog Number Vertical Bus Catalog Number Horizontal Bus Catalog Number 400 800 1200 1600 2000 8...

Страница 97: ...2000 2000 x x x x x x x x x x x x x x Rating Plugs Rating Plugs 400 Ampere Frame Rating Catalog Number Plug Rating 04SB200 04SB225 04SB250 200 225 250 04SB300 04SB350 04SB400 300 350 400 Rating Plugs 800 Ampere Frame Rating Catalog Number Plug Rating 08SB400 08SB450 08SB500 400 450 500 08SB600 08SB700 08SB800 600 700 800 Rating Plugs 1200 Ampere Frame Rating Catalog Number Plug Rating 12SB600 12SB...

Страница 98: ...l Alarm SBBA24 SBBA48 SBBA125 SBBA120 24V dc 48V dc 125V dc 120V dc Time Delay Undervoltage Accessory Catalog Number Time Delay Undervoltage Consult Siemens Drawout Safety Shutters Accessory Catalog Number 800A Envelope 1200A Envelope SBSS08 2000A Envelope SBSS20 Sliding Secondary Disconnects Accessory Catalog Number Sliding Secondary Disconnects SBSDLT SBSDLB SBSDRT SBSDRB The catalog number for ...

Страница 99: ...ower Motor runs for 20 seconds does not charge springs lamp on LT4 blinks slowly one second on two seconds off 1 Remove power from LT1 and LT5 manually charge breaker Reapply power to LT1 and LT5 motor should run for less than 10 seconds and shut off Lamp on LT4 should remain on Breaker will not close electrically 1 Check to see if springs are charged by checking charged indicator flag 2 Check for...

Страница 100: ...98 Courtesy of NationalSwitchgear com ...

Страница 101: ...Electrical Diagrams 99 Courtesy of NationalSwitchgear com ...

Страница 102: ...100 Electrical Diagrams Courtesy of NationalSwitchgear com ...

Страница 103: ...rgy Automation Inc Distribution Controls Division 3333 State Bridge Rd Alpharetta GA 30202 Siemens is a registered trademark of Siemens AG Bulletin 2 20 4C Supersedes 2 20 4B 994 Courtesy of NationalSwitchgear com ...

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