Starting protection, synchronization and control for synchronous motors

  Mot or Pr ot ection Multilin Digital Energy

• Complete asset monitoring - Field Winding temperature and
• Access to information - RS485 Communications port and Modbus RTU Protocol
• Improve uptime of auxiliary equipment - Through I/O monitoring
>Starting, synchronizing and protection of collector-ring or brushless-type synchronous mo
• Field application
• DC field current loss, exciter current loss, DC field voltage
>40 Character backlit display for easy viewing of settings and actual va
• PF regulation, reluctance torque synchronizing
• Protects motor during start up and in the event of
• Squirrel cage winding overheating protection
• Automatic phase rotation correction
• Auto-loading and incomplete sequence
• Regulator tuning mode
• True RMS metering with DFT filtering
• Optional power factor regulator with adjustable settings
• Power factor & pull out protection (Optional)
• Speed dependent squirrel cage overload protection
• Motor restart protection

  statistical data

  User Interface Protection and Control

  check

• Function keys allow programming of settings and
• State of the art software for configuration and commissioning GE Multilin products
• Document and software archiving toolset to ensure reference material and device utilities are up-to-date

  asynchronous operation

  viewing of measured values

  SPM SyNCHRONOUS MOTOR PROTECTION SySTEM Starting protection, synchronization and control for synchronous motors

  FEATURES APPLICATIONS KEy BENEFITS Communications

• RS485 Serial Communications • Modbus RTU protocol
• Optional Ethernet communications using Multinet

  Serial to Ether converter

  

EnerVista

TM Software

  TM

  Integrator providing easy integration of data in the SPM into new or existing monitoring and control systems

• EnerVista
• Motor power factor
• DC excitor amps and voltage
• AC Current • Exciter field resistance
• Motor run time
• Record of trips

  SPM Synchronous Motor Protection System 200 150 DC Field Current Loss Protection

  Protection Option

  100

  The SPM controls starting, synchronizing

  80 This feature trips the motor when field

  60

  and protection of collector-ring or

  50

  current drops below the programmed

  40 brushless type synchronous motors. ime 30 setpoint after the motor has synchronized.

  25

  20 To utilize this feature a DCCT and Field Squirrel Cage Protection d Stall T

  15 ime Current Calibration Module must be

  An important motor protection function

  un T

  R

  10 ordered with the SPM.

  is preventing squirrel cage winding

  8

  00 3. able Zero Spee

  6 Reduced Voltage Starting overheating during motor starting.

  5 Allow

  4

  2.05 For brushless motors squirrel cage The SPM can dynamically adjust the motor

  3

  1.46

  protection is derived from stator current stall time to allow successful starting

  2

  1.05

  inputs. Protection characteristics are during reduced voltage conditions.

  1.5

  shown in the following graph and the

  ection 1 200

  10

  20

  

30

  40

  50

  60

  70 80 90 100 ot

  thermal limit is defined by the Stall Time 150

  % Synchronous Speed 701761A8.eps and Locked Rotor Amps relay setpoints.

  100 or Pr

  Typical cage heating protection characteristics for

  80 2000 Mot collector ring motors.

  60 1500

  50 A Stall Time - 30 Sec

  40 Locked Rotor - 6XFLC Restart Protection

  30 e

  1000

  25 im

  B Stall Time - 10 Sec 900

  T

  The SPM simulates the cooling of a running

  20 ll

  Locked Rotor - 6XFLC 800 e ta im S

  15 700

  motor, updating the relay thermal memory

  T C Stall Time - 2 Sec ed

  600 un

  Locked Rotor - 6XFLC R pe

  10

  in one-minute spans. The SPM will also

  S 500 ro

  8 Ze Line 400 learn the amount of thermal capacity

  6 Voltage

  5 50%

  required for a successful motor start .

  300

  4

  3 Each new value of the thermal capacity 65% 200

  is compared with the learned starting

  2 80% 150

  1.5 90%

  capacity required. The SPM will prevent an

  100%

  1 A attempted restart if the cage winding has

  10

  20

  30

  40

  50

  60

  70 80 90 100 100 % Synchronous Speed 701760A8.cdr

  90

  not had sufficient cooling time to allow a

  80

  successful start. This element is used to

  70 These curves show how the trip characteristic

  60 of the amortisseur winding protection is

  avoid motor overheating due to frequent

  50 adjusted for reduced voltage starts. ime (seconds) starts.

  40 Trip T B

  30 Functional Block Diagram

  20 AC BUS ANSI DEVICE NUMBERS

  15

  48

  26F Field overtemperature SPM

  Under voltage

  27

  37 Undercurrent or

  10

  86 underpower

9 Incomplete sequence

  8

  48

  50P Instantaneous

  7

  94 C overcurrent

  6

  55 Power factor

  5

  56 Field application Stator

  I A C

  4

  86 Lock out Protection

  50P

  55

  94 Tripping (469)

  Reluctance torque

  3 95 sync. / resync.

  V A C

  96 Autoloading relay

  2 .8 .9 1

  1.5

  3

  5

  2

  4 6 7 8 10

  I DC Trip Current

  Calibrator (Multiples of Programmed Full Load Current)

  37 701762A6.cdr

  Typical cage heating protection for brushless

  27

  26F

  95 motors.

  V DC

DC

CT

  For collector ring motors the squirrel cage

  MOTOR

  48

  protection algorithm is based on motor

DC SUPPLY

  rotation speed during acceleration. Speed

  94

  is determined from the frequency of the induced rotor voltage across the rotor

  95 CLUTCH

  discharge resistor. COUPLING

  56 At less than synchronous speed the

  following typical cage heating protection

  96

  characteristics are used:

  LOAD 446

  SPM Power factor regulation – functional block diagram.

  Power factor regulation is a DC control signal output used to control a variable SCR exciter output . This replaces the standard power factor analog signal output. This option is not recommended for brushless applications. The regulator has five set-points that can be adjusted while the motor is running to facilitate regulator tune-up. They are:

  Control Signal PF Feedback PF Setpoint Reg Stability Reg Floor Reg Output Reg Gain _701754A5.cdr

  PF Detection PF Regulator

  Current Input Voltage Input

  Contactor SCR Proportional Exciter

  Field DC Supply to Motor Field Field

  Main Contactor A B C MOTOR

  The SPM offers the user a variety of input and output solutions:

  Inputs and Outputs

  The SPM has built-in test diagnostics to indicate that the relay is operating properly prior to start-up. The SPM also contains a test mode, which includes the following tests:

  Self-Tests and Diagnostics

  The SPM has a 40 character LCD display for programming, displaying trip information, and monitoring metered values such as line amperes, field amperes, power factor, line current, field volts, field current, and field ohms. The SPM also stores motor run time and the number and types of motor trips. Trip, Field Application (FAR) and FCX relay states may also be monitored.

  SPM Displays and Messages

  The SPM provides a number of monitoring and metering functions including:

  Monitoring and Metering

  Power Factor Regulation

  SPM Synchronous Motor Protection System

  Control Features

  Mot or Pr ot ection Incomplete Sequence Protection

  The Incomplete Sequence protection will issue a trip if the SPM detects that the motor has not reached synchronous speed within the programmable time delay.

  Exciter DC Voltage Protection

  Exciter voltage protection is available by connecting the exciter output to the SPM terminals VE+ and VE- through a voltage divider network (VDN). This is used on equipment where the exciters are energized prior to motor startup.

  Field Winding Overtemperature Option

  This function emulates a resistance temperature device (RTD) on the field windings. As the ratio of field voltage to field current increases, the field resistance increases, indicating an increase in temperature of the field winding. Field Winding Overtemperature is only available when the optional DCCT and Field Current Calibration Module have been ordered with the SPM.

  The SPM offers users advanced control features such as:

  Reluctance torque synchronizing is when a lightly loaded synchronous motor pulls into synchronization before the rotor poles are externally magnetized. The SPM’s field application control responds by applying excitation if a motor synchronizes on reluctance torque.

  Power Factor (Pull-Out) Protection

  The SPM provides pull-out protection for synchronous motors operating in either generating or motoring modes. The SPM provides power factor settings and displays the measured leading/lagging power factor. The power factor regulation option enables field forcing in advance of a pull-out condition. Motor pull-out protection is provided by a circuit which monitors the power factor and has a built in time delay to prevent inadvertent tripping on transients. Two modes of pull- out protection are available, re-sync mode and ride-thru mode. These modes will be initiated if the lagging power factor drops below the programmed set point, or if a line current surge occurs which is above four times the motor full load current. Re-sync mode operation will cause the Field Application Relay (FAR) to remove the motor field excitation. The motor will continue to run with the field removed for the programmed power factor delay time.

  If re-synchronization does not occur within this time the trip relay will operate and the motor will stop. In ride-thru mode the motor field excitation is not removed immediately. Instead, the SPM allows the motor to run for the power factor delay time. If the power factor dip or line current surge persists, the trip relay will operate and the motor will stop.

  Starting and Synchronizing

  For collector ring motors, the SPM detects the rotor speed and angle and determines the correct time to close the field application relay based on the percent synchronous slip setpoint . This applies excitation to the motor field and opens up the field discharge resistor loop. For brushless motors, the voltage is applied to the exciter after a preset programmable time elapses. Power factor pullout protection is then enabled. A contact (FCX) is also provided to signal automatic motor loading.

  Reluctance Torque Synchronizing

• Trip relay contacts
• System test
• Squirrel cage protection test
• Synchronization • Power factor test The system test performs a complete check of the internal memory, input-output devices and other system functions.
• PF setpoint – range from 0.9 lagging, through 1.0 to 0.0 leading
• Reg output – upper limit of the control voltage output signal
• Reg gain – adjusted for optimum regulator performance
• Reg stability – time adjustment to help compensate for instability
• Reg floor – lower limit of the control voltage output signal

COM Port RS232

  Terminating Capacitor

  4

  Communications

  The SPM is equipped with a rear RS485 port that can be used for remote programming, or for connection to a DCS, SCADA, or PLC. The port supports ModBus® RTU protocol. The RS485 port baud rate is variable from 300-115,000 bps.

  PERSONAL COMPUTER DB9 SPM UNIT #1 SPM UNIT #2 SPM UNIT #32 GND

  A3

  PROTECTION & CONTROL ^{ENTER SPM SCROLL SYNCRONOUS MOTOR PROTECTION & CONTROL ENTER SPM SCROLL SYNCRONOUS MOTOR PROTECTION & CONTROL ENTER} _{9 8 7 6 5 4 3 2 1 9 8 7 6 5 4 3 2 1}

  1

  2

  3

  5

  FCX Relay:

  6

  7

  8

  9 DCD RX (PC) TX (PC) DTR SIGNAL GND DSR RTS CTS RI DB9 SIGNALS RS232 GND RS485 POWER

  GE Multilin RS485 Converter or

  Equivilent 120 Ohm Terminating

  Inf Terminating

  120 Ohm Terminating

  Resistor Inf

  The field contactor auxiliary relay picks up at setpoint time delay after the FAR relay picks up and is used to signal external systems to auto load/unload the motor.

  The field application relay is a normally open contact. This contact closes to apply DC to the motor field to pull motor into synchronization.

  SPM Synchronous Motor Protection System Mot or Pr ot ection Field Voltage Input:

  Accepts a normally closed dry electrical interlock that opens when the motor is energized and closes when the motor is de-energized. Reduced Voltage Starting Input: Accepts a normally open dry electrical interlock that closes when the motor reaches full voltage during a reduced inrush start. Control Power: The SPM has an AC power supply with a range from 85 to 265

  The induced field voltages VF+ and VF- are monitored through their connection to the external discharge resistor via the VDN, providing instantaneous value of motor slip.

  Exciter Voltage Input:

  The VE+ and VE- terminals are connected to the exciter via the VDN to monitor DC exciter voltage.

  Exciter Current Input:

  The field current IE+ and IE- terminals are connected to the DC field via a DCCT and a calibration module (ordered separately) to detect field loss.

  Motor Line Current:

  Two input terminals, or four for brushless, are connected to the system current transformers.

  Motor ‘On’ Input:

  VAC. If control voltage excursions occur outside this range, an external stabilizing ansformer should be used in conjunction with optional separate power factor reference voltage inputs.

  FAR Relay:

  Power Factor Reference Voltage:

  The PF reference voltage is derived from the control power terminals, V1 and V2. The SPM also has an optional input for separately powered PF reference voltage,

  V1EXT and V2EXT. Effective range 85 to 265 VAC.

  Power Factor Analog Signal Output:

  A zero to ten volt DC output corresponds to the motor power factor. Zero volts represents zero lagging power factor, five volts represents unity power factor, and ten volts represents zero leading power factor. A one volt change corresponds to an 18 degree phase shift.

  

Power Factor Control Signal:

  If the relay is furnished with the power factor regulation option, then the Power Factor Analog Output is replaced with a 0 to 10 V power factor regulation control output. This signal is used as an input to a variable SCR exciter.

  Trip Relay:

  The Trip contact is connected to a failsafe normally open contact. This contact closes on relay power up and opens on a trip condition to de-energize the motor.

• A2
• A1 GND A3 GND A3
• A2
• A1
• A2
• A1 _{SPM SCROLL SYNCRONOUS MOTOR}
• Plug-&-Play Device Monitoring • Single-Line Monitoring & Control • Annunciator Alarming • Trending Reports

• Manuals • Application Notes • Guideform Specifications • Brochures • Wiring Diagrams • FAQ’s
• Service Bulletins

  Viewpoint Monitoring

  EnerVista™ Launchpad is a powerful software package that provides users with all of the setup and support tools needed for configuring and maintaining GE Multilin products. Launchpad allows configuring devices in real-time by communicating using serial, Ethernet, or modem connections, or offline by creating setting files to be sent to devices at a later time. Included in Launchpad is a document archiving and management system that ensures critical documentation is up-to-date and available when needed. Documents made available include:

  EnerVista™ Launchpad

  The EnerVista™ Suite is an industry leading set of software programs that will simplify every aspect of using the SPM relay. Tools to monitor the status of your motor, maintain your relay, and integrate information measured by the SPM into HMI or SCADA monitoring systems are available.

  EnerVista TM Software

  Integrator is a toolkit that allows seamless integration of GE Multilin devices into new or existing automation systems.Included in EnerVista Integrator is:

  TM

  EnerVista

  EnerVista™ Integrator

• OPC/DDE Server • GE Multilin Drivers

  This optional accessory provides proper calibration adjustment to obtain correct field amp readings. The CM is required for field current and/or field over temperature features. simple-to-use monitoring and data recording of small systems. Viewpoint Monitoring provides a complete HMI package with the following functionality:

  Calibration Module (CM)

  The VDN is included as a standard accessory.

  The VDN is provided to connect the SPM to field and/or exciter voltages.

  Voltage Divider Network (VDN)

  The SPM is supplied in a compact S1 drawout case. The drawout case allows the unit to be removed without disconnecting the rear terminal wiring.

  Hardware Space Saving Case

  DCCT is included with the optional PG2SPM or PG4SPM overtemperature/current loss accessory package.

  The DCCT is required for field current and/ or field over temperature features. 200A and 400A versions are available. The DCCT works in conjunction with the CM and both are available in a separate accessory package. See order code for more details.

  DC Current Transformer (DCCT) The optional DCCT detects DC field current.

  Mot or Pr ot ection The CM calibration module is included with the optional PG2SPM or PG4SPM overtemperature/ current loss accessory package.

  SPM Synchronous Motor Protection System

  Viewpoint Monitoring is a powerful yet

  GE Multilin Multilin SPM Synchronous Motor Protection System g

  VOLTAGE DIVIDER NETWORK (VDN) SYNC MOTOR A18 A19

  MODULE (CM) 240 VAC 120 VAC

  6

  5

  2

  1

  4

  3

  8

  7 FIELD CONTACTOR TYPICAL BRUSHLESS MOTOR CONNECTION T1 T3 T2 EF1 FIELD FC FC R EF2 (E+) (V+) (E-)

  (V-)

  V + F F

  V - EXCITER/FIELD

  VOL TA GE A21 A20 V + V -

  E E A B C

PHASE CURRENT INPUT

DCCT A13 A14 A15 COM FCX

• Trip Relay closed during normal operation FIELD CURRENT CALIBRATION MODULE DIRECT CURRENT CT MAIN CONTACTOR OVERLOAD RELAY

  N/C FIELD CON TA CT OR A UX. (FCX)

  A22 A23

  FCX N/O TRIP1 TRIP2 A6 A7 FIELD APPLICA TION

  (F AR) FAR 1 FAR 2 M RS485 A1

  TO PLC OR COMPUTER B1

  I2S I2T

B2 B4 B3

  I3T

  I3S SPM Sync. Protection/Control

  NOMENCLATURE FIELD CURRENT CALIBRATION

  I3S FC FIELD CONTACTOR RM MX NOTES: 1) Relays shown with no control power applied to relay 2)

  MOTOR TERMINALS OPTIONAL ACCESSORIES CM DCCT M OL T1, T2, T3

  I3T

  SPM Synchronous Motor Protection System Mot or Pr ot ection Typical Wiring

  USED FOR SEPARATELY SUPPLIED POWER FACTOR REFERENCE VOLTAGE (OPTIONAL CONNECTION) STOP

  START MAIN AUXILIARY M M EXCITER CONTACTOR M OL SUPPLY C B A TYPICAL COLLECTOR RING MOTOR CONNECTION T1 PHASE C T3 T2

  (+) F1 FIELD FIELD DISCHARGE RESISTOR FIELD CONTACTOR FC FC EXCITER

  V+ EXCITER V- CM

  8 CM

  7 FC F2 (R1) (F2) (E+) (V+)

  (E-) (V-)

  VOLTAGE DIVIDER NETWORK (VDN) A17 A16

  N+ N- PO WER FA CT OR OUTPUT

  V

  1 V2 B9 G1 B8 B10 CON TROL PO WER REF . V OL T. CHASSIS GROUND FILTER GROUND A21 A20

  V + V - A18 A19

  V + F F E E

  V - EXCITER/FIELD

  V OL TA GE FIELD

CURRENT

OPTIONAL REF. VOLT. A5 A4

  V V A24 A25

I - I +

E E ^1EXT

  2EXT REDUCED V OL TA GE DIGIT AL INPUTS A11 A12 MX1 MX2 MX MONIT OR A9 NX2 A10 NX1 SYNC MOTOR PF ANALOG OUTPUT OR PF REG CONTROL SIG OUTPUT (IF PF REGULATOR OPTION)

  ON REDUCED VOLTAGE STARTERS, REMOVE JUMPER AND CONNECT A NO. AUX CONTACT FROM THE FINAL STEP CONTACTOR HERE. RM EXCITER TO EXCITER POWER SUPPLY

  BRUSHLESS & COLLECTOR RING - 701756AP.cdr COLLECTOR RING - 701751.DWG BRUSHLESS - 701753.DWG

  ( ) B1

  I2S I2T

PHASE CURRENT INPUT

B2 B4 B3

• TRIP OUTPUT RELA YS

• A2 + A3 COMM GND

  SPM Synchronous Motor Protection System

  Features Front View Rear View

QUICK RELEASE TABS

  A wire lead seal can be used to prevent unauthorized removal of relay.

SCROLL KEYS

  Used to make a selection or acts as an enter key.

  Menu of all accessible setpoints and actual values for easy reference.

  Used to remove display for easy access to drawout.

LOCKING PROVISION

  CONTRAST DIAL Lightens or darkens display. PULLDOWN DOOR Hides menu when not in use. LCD DISPLAY Backlit 32 character display for setpoints, actual values and status.

  Programmable auto scan sequence for unattended operation.

  Used to scroll through the various menus and change setpoint parameter values.

ENTER KEY

  Mot or Pr ot ection GE KEY Used to enter or exit the different modes of the SPM. These are Standby, Test, Statistics, and Programming modes.

DISPLAY FUNCTION MENU

S1 CASE

  OUTPUTS POWER FACTOR: 0-10 VDC analog signal.

  FIELD: DC field voltage input. REDUCED VOLTAGE: Contact input for reduced voltage starting. Motor ÒONÓ input. Exciter current input. Power Factor reference voltage (for separately powered option).

  INPUTS EXCITER: Exciter voltage inputs. Connected via DCCT and CM.

  FAR: Field application relay. FCX: Autoloading of the motor.

  Accept #8 wire.

  MOTOR LINE CURRENT 2 Phase current inputs.

  Compact S1 rugged metal/bakelite case. Fits standard cutout.

  CONTROL POWER 85 TO 265 VAC. TERMINAL BLOCK A RELAYS TRIP: Normally open, failsafe trip relay.

  Active Output: 0 – 10 VDC max @ RL 1K (min load) Accuracy: ±10% (0.1 v) Isolation:

  5 Conversion range: 0.05 – 6 x CT Frequency: 50/60 Hz Accuracy:

  IEC255-5 500 VDC, from relays, CTs, VTs, power supply to safety ground

  Insulation resistance:

  TyPE TESTS Dielectric strength: Per IEC 255-5 and ANSI/IEEE C37.90, 2.0 kV for 1 minute from relays,CTs,VTs power supply to safety ground

  10A 250 VAC or 30 VDC Max operating voltage: 250 VAC

  1 A DC continuous NEMA R300 Break:

  10 A AC continuous NEMA A300

  FAR, TRP Form A FCX Form C Rated load:

  36 V VpK RELAy CONTACTS Type:

  @ <2 x CT ±0.5% of 2 x CT true RMS @ <2 x CT ±1% of 6 x CT true RMS OUTPUTS PF ANALOG OUTPUT Type:

INPUTS FIELD CURRENT INPUTS

10 VA nominal

EXCITER VOLTAGE INPUTS

  IEC 255-5 0.5 Joule 5 kV EMI: C37.90.2 electromagnetic interference @ 150 MHz and 450 MHz,

• 40° C to +85° C

  10 V/m Static:

  IEC 801-2 static discharge Vibration: Sinusoidal vibration 8.0 g for

  72 hrs

  5.69" (144) CUTOUT

  (236) 8.81" (224)

  4.41" (112) 0.22" (5.6)

  Time delay: 0.1 – 10 sec Accuracy: ±5% APPROVALS UL: UL listed CSA: CSA approved

  SPM Synchronous Motor Protection System Mot or Pr ot ection

  CT primary: 5 – 1000 Conversion range: 0.05 – 1 x CT Accuracy:

  ± 2%

  Conversion: 0 – 350 VDC (prior to VDN) Accuracy: ±1% SWITCH INPUTS (MX AND NX) Type:

  Dry contact Internal interrogation voltage: 85 – 265 VAC (control voltage)

  Technical Specifications ENVIRONMENTAL Humidity: 0 – 95% non-condensing Operating temperature: -20° C to +70° C Storage temperature:

  MONITORING POWER FACTOR Range: 0.01 to 1 to -0.01

  POWER SUPPLy CONTROL POWER

Input: 85 – 265 VAC @ 48 – 60 Hz

Power:

  IEC255-4 impulse/high frequency disturbance, Class III Level Impulse test:

  

Holdup: 100 ms typical @ 120 VAC

PACKAGING Shipping box:

  12.50” x 10.50” x 9.75” (L x H x D) 318 mm x 267 mm x 248 mm (L x H x D) Ship weight: 14.25 lbs/6.45 kg *Specifications subject to change without notice.

  Dimensions SPM FRONT

SPM SIDE

SPM PANEL CUT-OUT

  6.75" (171) 1.42" (36)

  

6.19"

(157)

0.75" (19)

  0.22" (5.6) (4 PLACES) 0.25" Dia. (6.3) 8.38"

  (212) 4.19" (106) 2.19"

  (56) 4.38" (111)

  Transients: ANSI C37.90.1 oscillatory (2.5 kV/1 MHz) ANSI C37.90.1 fast rise (5 kV/10 ns Ontario Hydro A-28M-82

CL CL

  Visit www.GEMultilin.com/SPM to: METERING PHASE CURRENT INPUTS CT primary: 5 – 2000 CT secondary:

• 200A DCCT & Calibration Module PG2SPM
• 400A DCCT & Calibration Module PG4SPM
• mSPM Retrofit Package MPSPM
• Viewpoint Monitoring
• View Guideform specifications
• Download the instruction manual
• Review applications notes and support documents
• Buy an SPM online

  VP-1 Accessories for the SPM

  0410-v6

  SPM * * SPM SPM: standard starting and protection relay with VDN board PF PF: power factor regulation option used on motors with proportional SCR exciter. (not recommended for brushless applications)

  Inches (mm) 701752A9.eps ^{SPM Sync. Protection/Control}

  6.94" (125) PANEL 9.29"

  H Harsh environment conformal coating Ordering