Synchronous motor protection system Starting protection, synchronization and control for synchronous motors Key Benefits • Complete asset monitoring - Field Winding temperature and statistical data • Access to information - RS485 Communications port and Modbus RTU Protocol • Improve uptime of auxiliary equipment - Through I/O monitoring Applications • Starting, synchronizing and protection of collector-ring or brushless-type synchronous motors Features Protection and Control User Interface • Field application • 40 Character backlit display for easy viewing of settings and actual values • DC field current loss, exciter current loss, DC field voltage check • PF regulation, reluctance torque synchronizing • Function keys allow programming of settings and viewing of measured values • Protects motor during start up and in the event of asynchronous operation • 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 Monitoring and Metering • Motor power factor • RS485 Serial Communications • Optional Ethernet communications using Multinet Serial to Ether converter EnerVistaTM Software • 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 • EnerVistaTM Integrator providing easy integration of data in the SPM into new or existing monitoring and control systems • DC excitor amps and voltage • AC Current • Exciter field resistance • Motor run

SPM Synchronous Motor Protection System This feature trips the motor when field current drops below the programmed setpoint after the motor has synchronized. To utilize this feature a DCCT and Field Current Calibration Module must be ordered with the SPM. Reduced Voltage Starting An important motor protection function is preventing squirrel cage winding overheating during motor starting. For brushless motors squirrel cage protection is derived from stator current inputs. Protection characteristics are shown in the following graph and the thermal limit is defined by the Stall Time and Locked Rotor...

SPM Synchronous Motor Protection System 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...

SPM Synchronous Motor Protection System Field Voltage Input: 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 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. 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...

SPM Synchronous Motor Protection System 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™ Launchpad 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,...

SPM Synchronous Motor Protection System Typical Wiring TYPICAL BRUSHLESS MOTOR CONNECTION T2 SYNC MOTOR NOMENCLATURE FIELD CURRENT CALIBRATION MODULE DIRECT CURRENT CT MAIN CONTACTOR OVERLOAD RELAY MOTOR TERMINALS OPTIONAL ACCESSORIES VOLTAGE DIVIDER NETWORK (VDN) PHASE CURRENT INPUT NOTES: Motor Protection 1) Relays shown with no control power applied to relay 2) *Trip Relay closed during normal operation GE Multilin FIELD CONTACTOR TYPICAL COLLECTOR RING MOTOR CONNECTION SYNC MOTOR FIELD DISCHARGE RESISTOR FILTER GROUND FIELD CONTACTOR VOLTAGE DIVIDER NETWORK (VDN) PHASE CURRENT INPUT CONTROL...

SPM Synchronous Motor Protection System Features Front View GE KEY Used to enter or exit the different modes of the SPM. These are Standby, Test, Statistics, and Programming modes. QUICK RELEASE TABS Used to remove display for easy access to drawout. LOCKING PROVISION A wire lead seal can be used to prevent unauthorized removal of relay. Motor Protection LCD DISPLAY Backlit 32 character display for setpoints, actual values and status. Programmable auto scan sequence for unattended operation. SCROLL KEYS Used to scroll through the various menus and change setpoint parameter values. ENTER KEY Used...

SPM Synchronous Motor Protection System Technical Specifications Motor Protection OUTPUTs PF analog output Type: Active Output: 0 – 10 VDC max @ RL 1K (min load) Accuracy: ±10% (0.1 v) Isolation: 36 V VpK relay contactS Type: FAR, TRP Form A FCX Form C Rated load: 10 A AC continuous NEMA A300 1 A DC continuous NEMA R300 Break: 10A 250 VAC or 30 VDC Max operating voltage: 250 VAC POWER SUPPLY control power Input: 85 – 265 VAC @ 48 – 60 Hz Power: 10 VA nominal Holdup: 100 ms typical @ 120 VAC environmentAL Humidity: 0 – 95% non-condensing Operating temperature: -20° C to +70° C Storage temperature:...