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SM-1500  

Motor Cutoff Switch Assembly

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Courtesy of NationalSwitchgear.com

Summary of Contents for SM-1500

Page 1: ...SM 1500 Motor Cutoff Switch Assembly Powered by Safety Courtesy of NationalSwitchgear com ...

Page 2: ...witch Assembly SM 1500 Contact Information Powell Electrical Systems Inc www powellind com info powellind com Service Division PO Box 12818 Houston Texas 77217 2818 Tel 713 944 6900 Fax 713 948 4569 Courtesy of NationalSwitchgear com ...

Page 3: ... 2002 4 13 4 13 3 as a signal word but used in this manual is IMPORTANT This is defined as IMPORTANT indicates a section of the manual covering a non hazardous situation but one where Powell feels proper attention is warranted IMPORTANT IMPORTANT Qualified Person For the purposes of this manual a qualified person as stated in NFPA 70 is one familiar with the construction and operation of the equip...

Page 4: ...7 1 Removing the Old Motor Cutoff Switch Assembly 7 2 Installing the New Motor Cutoff Switch Assembly into the Circuit Breaker 8 Figure 1 Motor Cutoff Switch Assembly 6 Figure 2 Motor Cutoff Switch Assembly Installed 7 Figure 3 Removing Hex Head Bolts 7 Figure 4 Cut Tie Wrap Holding Wire Harness to Motor Cutoff Switch Wires 8 Figure 5 Disconnect Wires from Motor Cutoff Switch 8 Figure 6 Installing...

Page 5: ...Powered by Safety ii Motor Cutoff Switch Assembly SM 1500 This page is intentionally left blank Courtesy of NationalSwitchgear com ...

Page 6: ...e by knowledgeable users of such equipment having experience and training in the field of high voltage electricity This document and all other documentation shall be fully read understood and all warnings and cautions shall be abided by If there are any discrepancies or questions the user shall contact Powell immediately at 1 800 480 7273 WARNING WARNING Before any adjustment servicing part replac...

Page 7: ... Procedure for critical adjustments 4 Illustrations photographs and description of the motor cutoff switch assembly The illustrations contained in this document may not represent the exact construction details of each particular type of motor cutoff switch assembly The illustrations in this document are provided as general information to aid in showing component locations only All photos and illus...

Page 8: ...atisfactorily 6 Where the possibility of induced voltages or stored electrical energy exists ground the phase conductors or circuit parts before touching them Where it could be reasonably anticipated that the conductors or circuit parts being deenergized could contact other exposed energized conductors or circuit parts apply ground connecting devices rated for the available fault duty B Safety Gui...

Page 9: ...e it from the metal clad switchgear 2 DO NOT WORK ON A CIRCUIT BREAKER WITH THE CONTROL CIRCUIT ENERGIZED 3 EXTREME CARE MUST BE EXERCISED TO KEEP ALL PERSONNEL TOOLS AND OTHER OBJECTS CLEAR OF MECHANISMS WHICH ARE TO BE OPERATED DISCHARGED OR RELEASED These circuit breakers utilize stored energy mechanisms These mechanisms must be serviced only by skilled and knowledgeable personnel capable of re...

Page 10: ...t the test personnel be no closer than one meter 3 from the front of the circuit breaker THE CIRCUIT BREAKER SHALL BE EITHER FULLY OPEN OR FULLY CLOSED WHEN MAKING HIGH POTENTIAL TESTS DO NOT TEST WITH CONTACTS PARTIALLY OPEN F Safety Labels The equipment described in this document has DANGER WARNING CAUTION and instruction labels attached to various locations All equipment DANGER WARNING CAUTION ...

Page 11: ...cted by means of a visible break and securely grounded Do NOT start to work on a closed circuit breaker or a circuit breaker with the main closing spring charged You should have the following when receiving the motor cutoff switch assembly Motor Cutoff Switch Use existing hardware when replacing Motor Cutoff Switch assembly 1 4 20 x 3 4 Hex Head Bolt 2 1 4 20 Flat Washers 4 1 4 20 Star Nuts 2 Tool...

Page 12: ...gure 2 Motor Cutoff Switch Assembly Installed a a Motor Cutoff Switch Assembly b Elevate and secure the circuit breaker so that there is at least 6 inches of clear space below the base pan of the circuit breaker c Once the circuit breaker is stable and secure remove the two 2 1 4 20 x 3 4 hex head bolts holding the assembly to the circuit breaker floor pan using a 7 16 socket wrench and 7 16 open ...

Page 13: ... on a closed circuit breaker or a circuit breaker with the main closing spring charged Perform the following steps to install the new motor cutoff switch assembly a Remove the front cover of the circuit breaker b Elevate and secure the circuit breaker so that there is at least 6 inches of clear space below the base pan of the circuit breaker c Once the circuit breaker is stable and secure position...

Page 14: ... using the two 2 1 4 20 star nuts Figure 6 a and torque the two hex head bolts to 5 7 ft lbs e Reconnect the wires to the new motor cutoff switch Figure 7 and tie wrap the wire harness to the wires from the motor cutoff switch Figure 8 No adjustments are required Figure 7 Reconnect Wires to Motor Cutoff Switch Figure 8 Tie Wrap Wire Harness a Tie Wrap a b Operate the circuit breaker electrically s...

Page 15: ...Powered by Safety 10 Motor Cutoff Switch Assembly SM 1500 This page is intentionally left blank Courtesy of NationalSwitchgear com ...

Page 16: ...ice Division Houston PO Box 12818 Houston TX 77217 Tel 713 944 6900 Fax 713 948 4569 www powellind com info powellind com 2006 Powell Industries Inc All rights reserved SM 1500 Motor Cutoff Switch Assembly January 2009 Courtesy of NationalSwitchgear com ...

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