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239 Motor Protection

239 Motor Protection
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MOTOR PROTECTION SYSTEM Motor protection and management for small to medium size motors Enhanced Motor Overload Protection with Thermal Modeling Simple configuration and system monitoring using EnerVista™ 239 Setup software Reduced cost and commissioning time with Protection, Monitoring, and Control in a single device Scalable protection with optional RTD inputs and advanced Motor Protection elements • Simplified testing and commissioning with built in simulation features • Field upgradable firmware and relay options • Easy access to system and relay information using Modbus RTU Motor Protection APPLICATIONS • Multiple groups of protection settings allows flexible protection for flexible systems FEATURES • Small to Medium sized three phase AC induction and synchronous motors • Pumps, conveyors, compressors, fans, etc. Protection and Control • Thermal Overload (15 selectable curves) - Trip and alarm, immediate current overload alarm • Phase short circuit • Mechanical jam • Thermal memory lockout • Single-Phasing /Current unbalance • Ground fault - trip and alarm • Overtemperature: via thermistor or optional RTD inputs • Undercurrent • Breaker Failure • Trip/alarm/auxiliary/service outputs • Multi-speed motor protection • Motor start supervision Communications • RS485 Serial Communications • Modbus RTU protocol Monitoring and Metering • Status/current/temperature display • Fault diagnosis • Trending • Trip record, last 5 • Process control • Optional analog output User Interface • 40 Character backlit display for easy viewing of settings and actual values • 6 Motor and relay status LED's • Multiple programming keys to allow easy access to system values and relay settings EnerVista™ 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 • EnerVista™ Integrator providing easy integration of data in the 239 into new or existing monitoring and control systems

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239 Motor Protection System The 239 is a digital motor protection system designed for three phase AC motors and associated mechanical equipment . Advanced protection features include: Thermal Overload This function calculates the thermal capacity used by the motor during different stages of the motor operation. The value is updated based on the timecurrent overload characteristics and the motor overload lockout time setpoints. Motor Starting Motor Protection During acceleration, the motor is protected by an I2t overcurrent curve which passes through the setpoints “Locked Rotor Current” and...

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239 Motor Protection System dust. The 239 can trigger a trip or an alarm if the ground pickup level is exceeded. A time delay may be entered for time coordination of systems with several levels of ground fault detection. There are two ground inputs available in the 239, allowing two methods of ground protection. • Core balance (Zero sequence) High Impedance Ground Fault (HGF) current transformers with 5A secondary • Core balance (Zero sequence) current transformers with a 50:0.025 Amp current ratio for sensitive current detection. When the residual connection of the phase CTs is used to...

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239 Motor Protection System Fault Diagnosis The 239 keeps a record of the cause of the last five trips issued. The relay will also record the phase current, ground current, and RTD temperatures measured at the time of the last trip. Motor Alarming Alarm functions include immediate overload warning, unbalance, undercurrent and internal self check fault . Often an alarm can be generated soon enough to enable corrective action to be taken before a trip occurs. Testing Motor Protection While periodic calibration is not required, the PICKUP LED is useful during commissioning or routine...

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239 Motor Protection System and setpoints to be remotely accessed by a PLC or SCADA system. A front panel LED verifies correct operation of the communication port. The 239 is also capable of being integrated into a local area network using the Multinet™ Serial to Ethernet converter. Networking allows easy access to information from multiple monitoring and control devices such as SCADA's and HMI's. User Interface The 40 character LCD and keypad provide convenient local communications and control. Setpoints can be modified locally using the keypad and display. To help prevent unauthorized...

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Typical Wiring -------------RESIDUAL GROUND CONNECTION -PHASE A CT ZERO SEQUENCE GROUND CONNECTION ------- Motor Protection STATOR THERMISTOR EMERGENCY RESTART EXTERNAL RESET 1) RELAY CONTACT STATE SHOWN WITH CONTROL POWER NOT APPLIED. 2) RELAY FACTORY DEFAULTS: TRIP, ALARM, AUXILIARY: NON-FAILSAFE SERVICE: FAILSAFE SHIELD TERMINALS ARE INTERNALLY CONNECTED TO SAFETY GROUND TERMINAL 13 4) RTD TEMPERATURE SENSING AND ANALOG OUTPUT OPTIONAL

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239 Motor Protection System Technical Specifications PROTECTION PROTECTION thermal model / overload overload Curves: separate start and Run Overload Curves Run: 15 Curves, fixed shape start: Per Equation: T(I) = Tsst x I2 I2LRC Where: Tsst = Save Stall Time ILRC = Locked Rotor Current save stall Time Range: 1.0 - 600.0 sec Locked Rotor Current Range: 0.5 - 11.0 x FLC Overload Pickup Range (FLC): 0.1-150 A for CT Pri Set < 50A 1-1500 A for CT Pri Set > 50 A THERMAL MODEL / RTDs (OPTION) Inputs: Type: Range: Trip/alarm range: Dead band: Accuracy: Lead Resistance: 3 RTDs,...

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239 Motor Protection System H Harsh enviornment conformal coating Motor Protection Modifications MOD500: Portable test/carrying case MOD504: Removable terminal blocks MOD505: Enhanced start protection MOD506: Custom programmable overload curve MOD509: Directional ground sensing with 120 V AC polarizing voltage MOD513: Class 1 Division 2 operation MOD517: Australian Mines approval • Multinet Serial to Ethernet converter MULTINET-FE Visit www.GEMultilin.com/239 to:- • View Guideform Specifications • Download the instruction manual • Review applications notes and...

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239 Motor Protection 1 / 8Páginas

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