Motor Wiring Diagrams

Motor Wiring Diagram 587-13816

Single Voltage, Delta Connected, With Current Transformers To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.

Motor Wiring Diagram 587-18753

Single Voltage, Wye Connected, With Current Transformers To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.

Motor Wiring Diagram 3226

Two Speed, One Winding, Constant Torque or Variable Torque, Single Voltage Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Two Speed, One Winding, Single Voltage, Constant Horsepower To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Two Speed, Two Winding, Single Voltage, Constant Torque, Variable Torque, or Constant Horsepower

Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


WYE Start - Delta Run, Single Voltage Motors or Dual Voltage Motors on Low Voltage Only Per NEMA MG1 1998-1.76, "A Wye Start, Delta Run motor is one arranged for starting by connecting to the supply with the primary winding initially connected in wye, then reconnected in delta for running condition." This is accomplished by a special Wye-Delta starter configuration using six leads from the motor and is intended to limit the inrush current required to start the motor. Motors designed by US Motors for Wye start, Delta Run may also be used for across the line starting using only the Delta connection. Damage will occur if the motor is operated with load for more than 30 seconds on the Wye without transition to Delta. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


6 Lead, Single Phase, Dual Voltage, Single Phase Type R or C Motor Lead Connections Connected for Counter - Clockwise Rotation

To Reverse Rotation Interchange Leads 2 & 4


4 Lead, Single Phase, Single Voltage, Single Phase Type R or C Motor Lead Connections, Connected for Counter - Clockwise Rotation

To Reverse Rotation Interchange Leads 2 & 4

Motor Wiring Diagram B109144

9 Lead, Dual Voltage (WYE Conn.) To reverse direction of rotation interchange connections L1 and L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.


9 Lead, Dual Voltage, WYE Connection, Part Winding Start ( PWS ) on Low Voltage Per NEMA MG1 1998-1.75, "A Part-winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits, at a predetermined point in the starting operation." This is intended to limit the inrush, current required to start the motor. NEMA MG1 1998 14.38 states that the motor, may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-winding Start also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on Part-winding without transition to full winding. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


12 Lead, Dual Voltage, WYE Start / DELTA Run, Both Voltages Per NEMA MG1 1998-1.76, "A Wye Start, Delta Run motor is one arranged for starting by connecting to the supply with the primary winding initially connected in wye, then reconnected in delta for running condition." This is accomplished by a special Wye-Delta starter configuration using six leads from the motor and is intended to limit the inrush current required to start the motor. Motors designed by US Motors for Wye start, Delta Run may also be used for across the line starting using only the Delta connection. Damage will occur if the motor is operated with load for more than 30 seconds on the Wye without transition to Delta. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


9 Lead, Dual Voltage, Delta Connection, Part Winding Start ( PWS ) on Low Voltage Per NEMA MG1 1998-1.75, "A Part-winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits, at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-winding Start also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on Part-winding without transition to full winding. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Single Voltage, Wye or Delta Connection, Part Winding Start (PWS) or Full Winding - Across the Line Start

Per NEMA MG1 1998-1.75, "A Part-winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits, at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-winding Start also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on Part-winding without transition to full winding. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Single Voltage, Wye or Delta Connection, Part Winding Start ( PWS ) or Full Winding - Across the Line Start

Per NEMA MG1 1998-1.75, "A Part-winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits, at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-winding Start also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on Part-winding without transition to full winding. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.

Motor Wiring Diagram 0338210 B

Winding RTD's

QTY-6

6 LEAD RTD's 1. There are qty-6 dual elements, Resistance Temperature Detectors (RTD) installed in the stator winding, (2 per Phase). Refer to nameplate attached to the motor adjacent to accessory outlet box for rating of the RTD's. 2. Detectors are installed in phases as shown. (White)


4-Lead, Single Phase, Single Voltage, Connected for CCW Rotation Facing End Opposite Drive Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number. Motor must be grounded (use green lead if supplied per the NEC)


Two Speed, Two Winding, Single Voltage, 7 – Lead (3 – Lead High Speed, 4 – Lead Low Speed), Constant Torque, Variable Torque, or Constant Horsepower

To Reverse Direction Of Rotation, Interchange Leads 1 & 2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


12 Lead, Dual Voltage, WYE Connection, with Thermal Protector, (9 Motor Lead & 3 Protector Leads) To reverse direction of rotation interchange connections L1 and L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.


Winding RTD's

Qty. 12

3 lead 1. There are qty-12 Resistance type Temperature Detectors (RTD) installed in the stator winding (4 per Phase). Refer to nameplate attached to the motor adjacent to accessory outlet box for rating of the rtd's. 2. Detectors are installed in phases as shown.

Motor Wiring Diagram 0412877 D

Winding RTD's

Qty-6 o 3 lead RTD's

Qty-6 o 2 lead RTD's

1. There are qty-12 Resistance type Temperature Detectors (RTD) installed in the stator winding, 4 per phase. Refer to nameplate attached to the motor adjacent to accessory outlet box for rating of the RTD's. 2. Detectors are installed in phases as shown.


6 Leads Out, WYE Connection, Single Voltage Full Winding - Across the Line Start To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.

Motor Wiring Diagram 0418653 C

Thermistors

QTY-3 o 4 Leads Out

Must be compliant to ROHS Directive EU 2002/95/IEC and Regulation EC 1907/2006 (REACH) as amended 1. This motor contains qty-3 Positive Temperature Coefficient (PTC) thermistors (1 per phase) embedded in the motor winding. 2. The thermistor lead marked TM5 is the common lead.


Winding RTD's

Qty-9 o 3 Lead RTD'S

1. There are qty-9 Resistance type Temperature Detectors (RTD) installed in the stator winding, 3 per phase. refer to nameplate attached to the motor adjacent to accessory outlet box for rating of the RTD'S. 2. Detectors are installed in phases as shown.


Single Voltage, Wye or Delta Connected, With Single Current Transformer To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


6 Lead, 1.73 to 1 Ratio Dual Voltage or WYE Start - Delta Run on Low Volts In a 1.73 to 1 ratio, dual voltage application, this motor is operated on the WYE connection for high volts or on the DELTA connection for low volts. It may also be used as a WYE Start - DELTA Run motor on low volts only. Per NEMA MG1 1998-1.76, "A Wye Start, Delta Run motor is one arranged for starting by connecting to the supply with the primary winding initially connected in wye, then reconnected in delta for running condition." This is accomplished by a special Wye-Delta starter configuration using six leads from the motor and is intended to limit the inrush current required to start the motor. Damage will occur if the motor is operated with load for more than 30 seconds on the Wye without transition to Delta. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.

Wiring Diagram 453698

Induction Generator

4 Lead, Single Phase, Single Voltage Each lead may consist of 1 or more cables having the same number Insulate T5 and T8 separately from one another

Wiring Diagram 0463458 A

Winding RTD'S

Qty-6 o 2 Lead RTD's

1. There are qty-6 Resistance type Temperature Detectors (RTD) installed in the stator windings (1 per phase per winding.) Refer to nameplate attached to the motor adjacent to accessory outlet box for rating of the RTD's. 2. Detectors are installed in phases as shown.


12 Lead, Single Voltage, Wye Start - Delta Run or Part Winding Start


12 Lead, Single Voltage, Wye Start - Delta Run or Part Winding Start Per NEMA MG1 1998-1.76, "A Wye Start, Delta Run motor is one arranged for starting by connecting to the supply with the primary winding initially connected in wye, then reconnected in delta for running condition." This is accomplished by a special Wye-Delta starter configuration using six leads from the motor and is intended to limit the inrush current required to start the motor. Motors designed by US Motors for Wye start, Delta Run may also be used for across the line starting using only the Delta connection. Damage will occur if the motor is operated with load for more than 30 seconds on the Wye without transition to Delta. Per NEMA MG1 1998-1.75, "A Part-Winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits, at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-Winding Start may also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on part-winding without transition to full winding. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number. SPECIAL INFORMATION REGARDING PART WINDING STARTING This motor is not designed to fully accelerate when started with the part winding start connection shown on the motor connection diagram. In order to avoid damaging the motor when it is started with the part winding start connection, set timers so that the motor starter switches the motor connection from start to run within two seconds from the time that the motor is initially energized. The motor is not expected to fully accelerate before the motor connection is switched to run, but the momentary operation on the start connection should allow time for automatic voltage regulators on the power system to compensate for voltage dip resulting from the high current draw of the motor during

acceleration. Thus, voltage dip in the power system will be minimized through proper use of the part winding start connection. Once the motor has been switched over to the run connection, it will finish accelerating up to full speed. During the time that the motor is operated on the part winding start connection, it is expected that the motor may be noisier than when operated on the run connection and it is also expected that the line amp unbalance between phases may be approximately 100% to 150%. This is due to the adverse effect of harmonics that result from the unbalanced magnetic circuit on the part winding start connection. For further information regarding characteristics of polyphase induction motors when operated on a part winding start connection, refer to NEMA Publication MG 1-1998 Part 14.38.


2 Speed, 2 Winding, Single Voltage, Wye Start – Delta Run. Both High And Low Speeds Per NEMA MG1 1998 1.76 "A Wye Start Delta Run motor is one arranged for starting by connecting to the supply with the primary winding initially connected in wye then reconnected in delta for running condition." This is accomplished by a special Wye-Delta starter configuration using six leads from the motor and is intended to limit the inrush current required to start the motor. Motors designed by US Motors for Wye start Delta Run may also be used for across the line starting using only the Delta connection. Damage will occur if the motor is operated with load for more than 30 seconds on the Wye without transition to Delta. Per NEMA MG1 1998-1.75 "A Part-Winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-Winding Start may also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on part-winding without transition to full winding. To reverse direction of rotation interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number. SPECIAL INFORMATION REGARDING PART WINDING STARTING This motor is not designed to fully accelerate when started with the part winding start connection shown on the motor connection diagram. In order to avoid damaging the motor when it is started with the part winding start connection set timers so that the motor starter switches the motor connection from start to run within two seconds from the time that the motor is initially energized. The motor is not expected to fully accelerate before the motor connection is switched to run but the momentary operation on the start connection should allow time for automatic voltage regulators on the power system to compensate for voltage dip resulting from the high current draw of the motor during acceleration. Thus voltage dip in the power system will be minimized through proper use of the part winding start connection. Once the motor has been switched over to the run connection it will finish accelerating up to full speed. During the time that the motor is operated on

the part winding start connection it is expected that the motor may be noisier than when operated on the run connection and it is also expected that the line amp unbalance between phases may be approximately 100% to 150%. This is due to the adverse effect of harmonics that result from the unbalanced magnetic circuit on the part winding start connection. For further information regarding characteristics of polyphase induction motors when operated on a part winding start connection refer to NEMA Publication MG 1-1998 Part 14.38.


Thermostats

Qty-3 N.C. Thermostats o Shutdown

Qty-3 N.O. Thermostats o Alarm

1. Motor is equipped with qty-3 (1 per phase) Normally Open thermostats set to close at high temperature for actuating an alarm system. 2. Motor is equipped with qty-3 (1 per phase) Normally Closed thermostats set to open at high temperature for actuating shutdown procedures. 3. Thermostats must not be used to switch above 18 amps at 24 VDC or 12 amps at 230 VAC.


Single Voltage, Wye Connected, With Current Transformers, Lightning Arrestors, & Surge Capacitors To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Thermasentry Thermistors

Qty 1 - 115/230V OR 460V OR 575V Thermasentry Module

QTY 3 - Thermasentry Thermistors 1. There are qty. 3 Positive Temperature Coefficient (PTC) Thermistors (1 per phase) installed in the motor winding. These thermistors are to be wired to a motor mounted or remote mounted Thermasentry control module. 2. Refer to connection diagram attached to the control module for correct wiring of the thermistors and module. Typical connection diagram, motor mounted or remote mounted Thermasentry


2 Speed, 1 Winding, Single Voltage, WYE START - DELTA RUN, High Speed Per NEMA MG1 1998 1.76 "A Wye Start Delta Run motor is one arranged for starting by connecting to the supply with the primary winding initially connected in wye then reconnected in delta for running condition." This is accomplished by a special Wye-Delta starter configuration using six leads from the motor and is intended to limit the inrush current required to start the motor. Motors designed by US Motors for Wye start Delta Run may also be used for across the line starting using only the Delta connection. Damage will occur if the motor is operated with load for more than 30 seconds on the Wye without transition to Delta. Per NEMA MG1 1998-1.75 "A Part-Winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-Winding Start may also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on part-winding without transition to full winding. To reverse direction of rotation interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number. SPECIAL INFORMATION REGARDING PART WINDING STARTING This motor is not designed to fully accelerate when started with the part winding start connection shown on the motor connection diagram. In order to avoid damaging the motor when it is started with the part winding start connection set timers so that the motor starter switches the motor connection from start to run within two seconds from the time that the motor is initially energized. The motor is not expected to fully accelerate before the motor connection is switched to run but the momentary operation on the start connection should allow time for automatic voltage regulators on the power system to compensate for voltage dip resulting from the high current draw of the motor during acceleration. Thus voltage dip in the power system will be minimized through proper use of the part winding start connection. Once the motor has been switched over to the run connection it will finish accelerating up to full speed. During the time that the motor is operated on the part winding start connection it is expected that the motor may be noisier than when operated on the run

connection and it is also expected that the line amp unbalance between phases may be approximately 100% to 150%. This is due to the adverse effect of harmonics that result from the unbalanced magnetic circuit on the part winding start connection. For further information regarding characteristics of polyphase induction motors when operated on a part winding start connection refer to NEMA Publication MG 1-1998 Part 14.38.


Powerblock Connection

12 Lead To reverse direction of rotation interchange connections L1 and L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.


3 Lead, Single Voltage, Single Phase, CW or CCW Rotation To reverse direction of rotation, interchange leads t1 and t4 Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.


7 – Lead, Dual Voltage (115/220), Single Phase with Thermal Protection, CW Rotation Facing Shaft To reverse rotation, interchange leads T5 and T8 Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.


12 Lead, Dual Voltage, WYE Connection, with Thermal Protector, (9 Motor Lead & 3 Protector Leads) To reverse direction of rotation interchange connections L1 and L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.


12 Lead, Dual Voltage, Wye Start/Delta Run, Both Voltages or 6 Lead, Single Voltage, Wye Start/Delta Run

Full voltage across the line start and run on delta connection.

Suitable for start on y, run on delta. Motors designed by US Motors for Wye Start, Delta Run may also be used for across the line starting using only the Delta connection. Damage will occur if the motor is operated with load for more than 30 seconds on the Wye without transition to Delta. Per NEMA MG1 1998-1.76, "A Wye Start, Delta Run motor is one arranged for starting by connecting to the supply with the primary winding initially connected in wye, then reconnected in delta for running condition". This is accomplished by a special Wye-Delta starter configuration using six leads from a motor and is intended to limit the inrush current required to start the motor. Each lead may have one or more cables comprising that lead. In such case, cable will be marked with the appropriate lead number. To reverse direction of rotation, interchange leads L1 & L2.


11 Lead, Dual Voltage, Single Phase, Thermally Protected, CW Rotation Facing shaft To reverse direction of rotation, interchange lead 5 with lead 6, and lead 7 with lead 8 Each lead may have one or more cables comprising that lead. In such case, cable will be marked with the appropriate lead number


5 Lead, Single Phase, Single Voltage, Thermally Protected, Connected For CW Rotation Facing Shaft To reverse direction of rotation interchange leads 7 & 8


6 leads, single phase, dual voltage, Connected for CW Rotation Facing shaft To reverse direction of rotation, interchange leads 5 & 8 Each lead may have one or more cables comprising that lead. In such case, cable will be marked with the appropriate lead number


2 Speed, 2 Winding, Single Voltage, Part Winding Start (PWS) on both Windings or Full Winding - Across the Line Start

Per NEMA MG1 1998-1.75, "A Part-Winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits, at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-Winding Start may also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on part-winding without transition to full winding. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Single Voltage, Delta Connected, With QTY 4 Current Transformers, Lightning Arrestors & Surge Capacitors

To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


18 Lead, Dual Voltage, Wye Connection, Part Winding Start ( PWS ) on Both Voltages Per NEMA MG1 1998-1.75, "A Part-winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits, at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-winding Start also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on Part-winding without transition to full winding. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


12 Lead Single Voltage WYE Start / Delta Run, or Part Winding Start To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Two - Speed, One Winding, Single Voltage, 9 Lead, Delta Connection, Variable Torque To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Single Voltage, Delta Connected, With Current Transformers, Lightning Arrestors & Surge Capacitors To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


Triple Rate Motor Connection

Maximum, Medium, & Minimum Horsepower To reverse direction of rotation interchange connections L1 and L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.

Motor Wiring Diagram A109145

9 Lead, Dual Voltage (DELTA Conn.) To reverse direction of rotation interchange connections L1 and L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.

Motor Wiring Diagram B109144

9 Lead, Dual Voltage (WYE Conn.) To reverse direction of rotation interchange connections L1 and L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.

Motor Wiring Diagram - Blower Connections

Single & Three Phase Blower Connection Diagrams, Thermally Protected To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.


RTD'S

Qty-6 o 6 LEAD RTD'S

1. There are qty-6 dual element, Resistance Temperature Detectors (RTD) installed in the stator winding, (2 per phase). Refer to nameplate attached to the motor adjacent to accessory outlet box for rating of the RTD's. 2. Detectors are installed in phases as shown.



QTY. 1 - Siemens Thermasentry Control Module N.O./N.C.

QTY. 3 - Thermasentry Thermistors

Typical connection diagram, remote mounted Thermasentry with N.O. and N.C. contacts 1. There are qty-3 Positive Temperature Coefficient (PTC) thermistors (1 per phase) installed in the motor winding. One per phase, connected in series, terminated on terminal strip terminals T1 and T2 in the motor accessory connection box. These are to be wired to the remote-mounted control module supplied with the motor. Wire the thermistor leads TM1 and TM2 to the module terminals T1 and T2. 2. Wire control power to module terminals a1 and a2. Control 3. For normally open contacts, use module terminals 97 and 98. 4. For normally closed contacts, use module terminals 95 and 96. Notes: 1. Output contact rating is: AC 240 volts 3 amperes maximum DC 24 volts 1 ampere maximum 2. Do not apply power directly across 95 and 96 or 97 and 98. Power may be 24 to 240 volts ac or dc. 3. The module automatically resets itself when temperature drops to a safe level.



QTY. 1 - Siemens Thermasentry Control Module N.O./N.C.


Typical connection diagram, remote mounted Thermasentry with N.O. and N.C. contacts 1. There are qty-3 Positive Temperature Coefficient (PTC) thermistors (1 per phase) installed in the motor winding. These thermistors are to be wired to a motor mounted or remote mounted N.O/N.C. Thermasentry control module. 2. For normally open contracts, connect output leads to 3' and 4'. 3. For normally closed, connect output leads to 3 and 4. Notes: 1. Do not apply voltage directly across terminals 3 & 4 or 3' & 4'. Output is rated for 120/240 VAC, 5 amps max current. 2. Terminals 1 & 2 must be energized before 3 & 4 are Normally Closed and 3' & 4' are Normally Open. 3. Do not ground thermistor connection. RO is a common, not a ground.

Motor Wiring Diagram 0639338 A

THERMASENTRY THERMISTORS

QTY. 2 - Seimens Thermasentry Control Module N.O. /N.C.


Typical connection diagram, remote mounted Thermasentry with N.O. and N.C. contacts 1. There is one set of Positive Temperature Coefficient (PTC) thermistors (1 per phase) installed in the motor winding. One per phase, connected In series, terminated on terminal strip terminals T1 and T2 in the motor accessory connection box. These are to be wired to the remote-mounted control module supplied with the motor. Wire the thermistor leads TM1 and TM2 to the module terminals T1 and T2. 2. There is a second set of Positive Temperature Coefficient (PTC) thermistors (1 per phase) installed in the motor winding. One per phase, connected in series, terminated on terminal strip terminals T3 and T4 in the motor accessory connection box. These are to be wired to the remote-mounted control module supplied with the motor. Wire the thermistor leads TM3 and TM4 to the module terminals T1 and T2. 3. Wire control power to module terminals A1 and A2. Control power may be 24 to 240 volts ac or dc. 4. For normally open contacts, use module terminals 97 and 98. 5. For normally closed contacts, use module terminals 95 and 96. Notes: 1. Output contact rating is: AC 240 volts 3 amperes maximum DC 24 volts 1 ampere maximum 2. Do not apply power directly across 95 and 96, or 97 and 98. 3. The module automatically resets itself when temperature drops to a safe level.


Winding Thermistors

QTY. 3 - Thermistors o 6 Leads Out

1. This motor contains qty-3 Positive Temperature Coefficient (PTC) thermistors (1 per phase) embedded in the motor winding.


Thermostats

Qty-6 N.O. Thermostats 1. Motor is equipped with qty-6 (2 per phase) normally open thermostats in the motor winding. Thermostats are set to close at high temperature. 2. Thermostats must not be used to switch above 18 amps at 24 VDC or 12 amps at 230 VAC.


12 Lead, Dual Voltage, Wye Start - Delta Run or Part Winding Start Per NEMA MG1 1998-1.76, "A Wye Start, Delta Run motor is one arranged for starting by connecting to the supply with the primary winding initially connected in wye, then reconnected in delta for running condition." This is accomplished by a special Wye-Delta starter configuration using six leads from the motor and is intended to limit the inrush current required to start the motor. Motors designed by US Motors for Wye start, Delta Run may also be used for across the line starting using only the Delta connection. Damage will occur if the motor is operated with load for more than 30 seconds on the Wye without transition to Delta. Per NEMA MG1 1998-1.75, "A Part-Winding Start motor is one which certain specially designed circuits of each phase of the primary winding are initially connected to the supply line. The remaining circuit or circuits of each phase are connected to the supply in parallel with initially connected circuits, at a predetermined point in the starting operation." This is intended to limit the inrush current required to start the motor. NEMA MG1 1998-14.38 states that the motor may not accelerate to full speed in part-winding and may be noisier than when on full winding. Motors designed by US Motors for Part-Winding Start may also be used for across the line starting using only the full winding connection. Damage will occur if the motor is operated with load for more than 2 seconds on part-winding without transition to full winding. To reverse direction of rotation, interchange leads L1 & L2. Each lead may have one or more cables comprising that lead. In such case, each cable will be marked with the appropriate lead number.

This motor is not designed to fully accelerate when started with the part winding start connection shown on the motor connection diagram. In order to avoid damaging the motor when it is started with the part winding start connection, set timers so that the motor starter switches the motor connection from start to run within two seconds from the time that the motor is initially energized.

The motor is not expected to fully accelerate before the motor connection is switched to run, but the momentary operation on the start connection should allow time for automatic voltage regulators on the power system to compensate for voltage dip resulting from the high current draw of the motor during

acceleration. Thus, voltage dip in the power system will be minimized through proper use of the part winding start connection. Once the motor has been switched over to the run connection, it will finish accelerating up to full speed.

During the time that the motor is operated on the part winding start connection, it is expected that the motor may be noisier than when operated on the run connection and it is also expected that the line amp unbalance between phases may be approximately 100% to 150%. This is due to the adverse effect of harmonics that result from the unbalanced magnetic circuit on the part winding start connection.

For further information regarding characteristics of polyphase induction motors when operated on a part winding start connection, refer to NEMA Publication MG 1-1998 Part 14.38.


Winding Thermistors

Qty (3) Thermistors o Alarm/Primary

QTY (3) Thermistors o Shutdown/Secondary

Must be compliant to ROHS Directive EU 2002/95/IEC and Regulation EC 1907/2006 (REACH) as amended 1. This motor contains qty-6 Positive Temperature Coefficient (PTC) thermistors (2 sets of qty. 3, 1 per phase per set) embedded in the motor winding. 2. The thermistor leads are marked TM1, TM2 and TM3 for alarm/primary, and TM11, TM22 and TM33 for shutdown/secondary.


DELTA and WYE To reverse direction of rotation interchange connections L1 and L2. Each lead may be comprised of one or more cables. Each cable will be marked with the appropriate lead number.


Thermostats

Qty-3 N.C. Thermostats o (High Speed)

Qty-3 N.C. Thermostats o (Low Speed)

1. Motor is equipped with qty-3 (1 per phase) normally closed thermostats per winding. Thermostats are set to open at high temperature. 2. Thermostats must not be used to switch voltages exceeding 18 VDC or 240 VAC.


Thermostats

Qty-3 N.O. Thermostats 1. Motor is equipped with qty-3 (1 per phase) normally open thermostats in the motor winding. Thermostats are set to close at high temperature. 2. Thermostats must not be used to switch above 18 amps at 24 VDC or 12 amps at 230 VAC.


Thermostats

Qty-3 N.C. Thermostats 1. Motor is equipped with qty-3 (1 per phase) normally closed thermostats. Thermostats are set to open at high temperature. 2. Contact ratings for thermostats: 120-600 VAC, 720 VA Note: thermostat leads may be located in either the main outlet box or, if so equipped, an auxiliary box.


Thermocouples

Qty-6 Thermocouples 1. This motor contains qty-6 thermocouples, 2 per phase, embedded in the motor winding. 2. The thermocouple wires are color coded. 3. To help prevent erroneous EMF's, do not lug thermocouple wires.



Qty 1 - 115/230V or 460V or 575V Thermasentry Module

Qty 3 - Thermasentry Thermistors

Typical connection diagram, motor mounted or remote mounted Thermasentry 1. There are qty. 3 Positive Temperature Coefficient (PTC) thermistors (1 per phase) installed in the motor winding. These thermistors are to be wired to a motor mounted or remote mounted Thermasentry control module. 2. Refer to connection diagram attached to the control module for correct wiring of the thermistors and control module.



Thermasentry Control Module

Qty-1 Thermasentry Control Module o (Alarm, Low Speed or Primary)

Qty-1 Thermasentry Control Module o (Shutdown, High Speed, Backup, or Spare)

Qty-6 Thermistors

Typical connection diagram, motor mounted or Remote mounted Thermasentry modules NOTE:

TERMINAL 9 NOT ON 460V CONTROL. Caution should be taken to insure that the alarm Leads are connected to the alarm controller and the shutdown leads to the shutdown controller. 1. There are qty - 6 (2 per phase, 3 for alarm, primary, low speed-3 for shutdown, spare, high speed) Positive Temperature Coefficient (PTC) thermistors installed in the motor winding. These thermistors are to be wired to a Thermasentry control module. 2. Refer to connection diagram attached to the control module for correct wiring of the control module

Motor Wiring Diagram 0853506 E

Thermostats

Qty-6 N.C. Thermostats o (Main & Spare)

1. Motor is equipped with qty-6 (2 per phase) normally closed thermostats in the motor winding. Thermostats are set to open at high temperature. 2. Thermostats must not be used to switch above 18 amps at 24 VDC or 12 amps at 230 VAC.

Motor Wiring Diagram 0899615 A

Thermistors

Qty-6 Thermistors o (8 Leads Out)

1. This motor contains qty-6 Positive Temperature Coefficient (PTC) thermistors (2 per phase) embedded in the motor winding. 2. The thermistor leads marked TM5 and TM55 are the common leads.

Motor Wiring Diagram 0948135 E


Thermasentry Control Module

Qty-3 Winding Thermistors o (Alarm, Low Speed or Primary)

Qty-3 Winding Thermistors o (Shutdown, High Speed or Spare)

Qty-2 Thermasentry Control Modules

Typical connection diagram, motor mounted or remote mounted Thermasentry with NO/NC contacts 1. There are qty-3 thermistors (1 per phase for alarm, low speed or primary) Positive Temperature Coefficient (PTC) thermistors installed in the motor winding. These thermistors are wired to Thermasentry control module. 2. There are qty-3 thermistors (1 per phase for shutdown, high speed or spare) PTC thermistors installed in the motor winding. These thermistors are wired to Thermasentry control module. 3. Refer to connection diagram attached to the control module for correct wiring of the control module. Notes: 1. Do not apply voltage directly across terminals 3 and 4 or 3' and 4'. Output is rated for 110 volts. 5 max current. 2. Input terminals 1 and 2 must be energized before 3 and 4 are normally closed and 3' and 4' are normally open. 3. Do not ground thermistor connections. RO is common, not ground. 4. Winding module 1 may be used for alarm, low speed (two wndgs), or primary. 5. Winding module 2 may be used for shutdown, high speed (two wndgs), or spare.

REV Motor Wiring Diagram 0992056

Thermistors

Qty 3 - Thermistors o (2 Leads Out)

1. This motor contains qty-3 Positive Temperature Coefficient Thermistors (1 per phase) embedded in the motor winding and internally connected in series.



Qty. 1 - Control Module N.O./N.C.

Qty. 3 - Thermasentry Thermistors

Typical connection diagram, motor mounted or remote mounted Thermasentry with N.O. and N.C. contacts

1. There are qty-3 Positive Temperature Coefficient (PTC) thermistors (1 per phase) installed in the motor winding. These thermistors are to be wired to a motor mounted or remote mounted N.O/N.C. Thermasentry control module. 2. For normally open contracts, connect output leads to 3' and 4'. 3. For normally closed, connect output leads to 3 and 4. Notes: 1. Do not apply voltage directly across terminals 3 & 4 or 3' & 4'. Output is rated for 120/240 VAC, 5 amps max current. 2. Terminals 1 & 2 must be energized before 3 & 4 are normally closed and 3' & 4' are normally open. 3. Do not ground thermistor connection. RO is a common, not a ground.

REV Motor Wiring Diagram 2003541

Winding Thermocouples

Qty-12 Thermocouples o (6 High Speed, 6 Low Speed)

1. This motor contains qty-12 thermocouples, 2 per phase, per winding embedded in the motor winding. 2. The thermocouple wires are color coded 3. To help prevent erroneous EMF's, do not lug thermocouple wires.

Motor Wiring Diagram X388299

4 Lead WYE Connection, Single Voltage (3 Lead with Neutral) To reverse direction of rotation interchange connections L1 and L2. Each lead may have one or more cables comprising that lead. In such case each cable will be marked with the appropriate lead number.

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Motor Wiring Diagrams