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GE 239 Instruction Manual
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GE 239 Instruction Manual

GE 239 Instruction Manual

Multilin motor protection relay
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See also: Instruction Manual
GE Consumer & Industrial
Multilin
239
Motor Protection Relay
CAUSE OF LAST TRIP:
MECHANICAL JAM
TRIP
AUXILIARY
ALARM
SERVICE
ACTUAL
SETPOINT
STORE
RESET
GE Multilin
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: (905) 294-6222 Fax: (905) 201-2098
Internet: http://www.GEmultilin.com
*1601-0067-DC*
Courtesy of NationalSwitchgear.com
MOTOR PROTECTION RELAY
PICKUP
COMMUNICATE
MESSAGE
VALUE
239
Instruction Manual
Firmware Revision: 2.7x
239PC Software: 2.7x or newer
Manual P/N: 1601-0067-DC (GEK-106613C)
Copyright © 2007 GE Multilin
E83849
ISO9001:2000
LISTED
IND.CONT. EQ.
52TL
GE Multilin's Quality
Management System is
registered to ISO9001:2000
QMI # 005094
UL # A3775

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  • Page 1 GE Consumer & Industrial Multilin MOTOR PROTECTION RELAY Instruction Manual Firmware Revision: 2.7x 239PC Software: 2.7x or newer Manual P/N: 1601-0067-DC (GEK-106613C) Motor Protection Relay Copyright © 2007 GE Multilin CAUSE OF LAST TRIP: MECHANICAL JAM TRIP AUXILIARY PICKUP ALARM SERVICE...
  • Page 2 The contents of this manual are the property of GE Multilin Inc. This documentation is furnished on license and may not be reproduced in whole or in part without the permission of GE Multilin. The content of this manual is for informational use only and is subject to change without notice.

  • Page 3: Table Of Contents

    ............................3-4 ....................... 3-7 ETPOINT CCESS ......................3-8 EFAULT ESSAGES 4: PROGRAMMING PROGRAMMING .........................4-11 ....................4-11 ETPOINT NTRY ETHODS S1: 239 SETUP ........................4-13 ........................4-14 REFERENCES ........................ 4-15 NALOG UTPUT RS485 S ......................4-16 ERIAL ..........................4-16 EFAULTS ....................4-17 ROGRAMMABLE ESSAGE ......................
  • Page 4 ENERVISTA 239 SETUP INTERFACE ................6-69 ..............6-69 ARDWARE AND OFTWARE EQUIREMENTS 239 S ................. 6-69 NSTALLING ISTA ETUP CONNECTING ENERVISTA 239 SETUP TO THE RELAY ..........6-72 ............... 6-72 ONFIGURING ERIAL OMMUNICATIONS ..............6-73 ONFIGURING THERNET OMMUNICATIONS ....................6-75 ONNECTING TO THE ELAY WORKING WITH SETPOINTS AND SETPOINT FILES ..........6-77...
  • Page 5 ....................7-102 ROUND LARM SWITCH INPUT ........................7-103 ANALOG OUTPUT ......................7-104 THERMISTOR ALARM ......................7-105 RTD MEASUREMENT ......................7-106 POWER FAILURE / NON-VOLATILE MEMORY .............7-107 ROUTINE MAINTENANCE VERIFICATION ..............7-108 APPENDIX 239 WARRANTY .........................A-1 INDEX 369 MOTOR MANAGEMENT RELAY– INSTRUCTION MANUAL TOC–3 Courtesy of NationalSwitchgear.com...
  • Page 6 TABLE OF CONTENTS TOC–4 369 MOTOR MANAGEMENT RELAY– INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 7: Relay Features

    1.1.1 239 Relay Features The GE Multilin 239 relay is designed to fully protect three phase AC motors against conditions which can cause damage. In addition to motor protection, the relay has features that can protect associated mechanical equipment, give an alarm before damage results from a process malfunction, diagnose problems after a fault and allow verification of correct relay operation during routine maintenance.
  • Page 8 RTDs can be monitored. These can all be in the stator or 1 in the stator and 2 in the bearings. Installing a 239 in a motor starter for protection and monitoring of motors will minimize downtime due to process problems.
  • Page 9 GROUND FAULT CONTROL STATOR RTD STATOR OVER SERVICE SERVICE BEARING TEMPERATURE RELAY ALARM RTDs BEARING OVER TEMPERATURE RS485 RS485 REMOTE COMMUNICATION MOTOR LOAD 819763AF.CDR FIGURE 1–1: Continuous Protection Features 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 1–3 Courtesy of NationalSwitchgear.com...
  • Page 10 CHAPTER 1: OVERVIEW FIGURE 1–2: Feature Highlights – Front 1–4 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 11 CHAPTER 1: OVERVIEW FIGURE 1–3: Feature Highlights – Rear 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 1–5 Courtesy of NationalSwitchgear.com...

  • Page 12: Typical Applications

    Versatile features and simple programming controls make the 239 an ideal choice for motor and equipment protection in a wide range of applications. In addition to basic electrical protection for motors, the 239 can protect against common faults due to process problems, such as: Mechanical protection of pumps using the undercurrent feature to detect loss of suction or a closed discharge valve.

  • Page 13: Order Code

    • 239PC Windows software (supplied free) • Phase and ground CTs • RS232 to RS485 converter (required to connect a computer to the 239 relay(s) to run 239PC) • RS485 Terminating Network • 2.25” collar for limited depth mounting (1009-0068) •...

  • Page 14: Specifications

    Activation: ............inrush 3 phase current increases from <5% to >101% FLC in 1 s Deactivation: ...........current drops to <100% FLC motor running if current >5% Locked Rotor: ...........0.5 to 11.0 ×FLC 1–8 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 15 Cu RTD:.............3 Ω max 3 wire lead resistance compensation COMMUNICATIONS Type: ..............RS485 2 wire, half duplex, isolated Baud Rate: ............1200 to 19.2k bps ® Protocol:..............Modbus Functions:............Read/write setpoints, read actual values, execute commands 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 1–9 Courtesy of NationalSwitchgear.com...
  • Page 16 Ω 0.009 0.01 0.01 PHASE CT (1A) 0.01 0.04 0.002 0.002 PHASE CT (5A) 0.002 0.04 0.002 GROUND CT 0.002 (5A) 0.002 0.025 0.07 GROUND CT 1.19 (50:0.025) 30.5 1–10 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 17 Holdup:..............non-failsafe trip: 200 ms failsafe trip: 100 ms both times at 120VAC / 125VDC It is recommended that all 239 relays be powered up at least once per year to avoid Note deterioration of electrolytic capacitors in the power supply.
  • Page 18 Ship Weight:............5 lbs. / 2.3 kg CERTIFICATION/COMPLIANCE ISO: ................Manufactured under an ISO9001 recognized program UL:................E83849 UL listed for the USA and Canada Specifications subject to change without notice. Note 1–12 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 19: Mounting

    2.1.1 Mounting Physical dimensions for the 239 and the required cutout dimensions are shown below. Once the cutout and mounting holes are made in the panel, use the eight #6 self tapping screws supplied to secure the relay. Mount the relay on a panel or switchgear door to allow operator access to the front panel keys and indicators.

  • Page 20: Product Identification

    Product attributes will vary according to the configuration and options installed based on the customer order. Before applying power to the relay, examine the label on the back of the 239 and check that the correct options are installed. 2–14 239 MOTOR PROTECTION RELAY –...
  • Page 21 MODEL NO: The model number shows the configuration of the relay. The model number for a basic unit is 239. RTD and AN will appear in the model number only if the RTD option or Analog Output option is installed. H will appear in the model number if conformal coating is required.

  • Page 22: External Connections

    RTD1 hot Alarm COM RTD1 comp Alarm NC RTD1 ret Auxiliary NO RTD2 hot Auxiliary COM RTD2 comp Auxiliary NC RTD2 ret Service NO RTD3 hot Service COM RTD3 comp 2–16 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 23 CHAPTER 2: INSTALLATION Table 2–2: External Connections CT ROW SIGNAL LOWER ROW SIGNAL UPPER ROW Service NC RTD3 ret V1 polarizing Vcom polarizing (Mod 509 only) (Mod 509 only) 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 2–17 Courtesy of NationalSwitchgear.com...
  • Page 24 CONNECTED TO SAFETY GROUND TERMINAL 13 RELAY FACTORY DEFAULTS: 819751B5.DWG TRIP, ALARM, AUXILIARY: NON-FAILSAFE RTD TEMPERATURE SENSING 819829B6.CDR AND ANALOG OUTPUT OPTIONAL SERVICE: FAILSAFE FIGURE 2–3: Typical Wiring Diagram 2–18 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 25 CTs should be selected to be capable of supplying the required current to the total secondary load which includes the 239 relay burden mentioned in Section 1.2: Specifications at rated secondary current and the connection wiring burden. The CT must not saturate under maximum current conditions which can be up to 8 times motor full load during starting or greater than 12 times during a short circuit.
  • Page 26 TYPICAL WIRING DIAGRAM. A ground CT with a ratio of 50:0.025 for sensing primary ground currents from 0.05 to 15 A is available from GE. Connect this CT to terminals 50:0.025 and COM. If a conventional 5 A secondary CT is used for zero sequence ground sensing, connect it to the 5A and COM terminals.
  • Page 27 Sensing levels below 20% of the phase CT primary rating are not recommended for reliable operation. FIGURE 2–4: Core Balance Ground CT Installation (unshielded cable) 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 2–21 Courtesy of NationalSwitchgear.com...
  • Page 28 Contactor: For maximum motor protection, program the trip relay to be failsafe and wire the contactor to the NO/COM trip relay terminals. When control power is lost to the 239, the contactor will trip to ensure maximum protection. If process 2–22 239 MOTOR PROTECTION RELAY –...
  • Page 29 NC/COM trip relay terminals. When control power to the 239 is lost, no protection is available and the motor will continue to run. This has the advantage that the process will not shut down, however the motor may be damaged if a fault develops under these conditions.
  • Page 30 DCS system. SWITCH INPUTS Each switch common terminal 38/39/40/41/42 is internally connected inside the 239. A single common wire can be connected between any of these terminals and a remote switch common terminal to reduce wiring if preferred.
  • Page 31 Other RTDs that can be selected and used with the 239 are 100 Ω nickel, 120 Ω nickel and 10 Ω copper. RTDs do not have to be the same type, however the 239 must be programmed correctly so that each RTD input matches the installed type. The factory default is 100 Ω...
  • Page 32 3 RTDs or separate three wire shielded cable of #18 AWG copper conductors for each RTD. The 239 shield terminal (48) and each RTD COM (51,54,57) are internally connected to safety ground, terminal 13. The shield connection of the RTD cable should not be grounded at both ends.
  • Page 33 0 to 20 mA output correspond to 0 to 10V (R = V/I = 10 V / 0.02 A = 500 Ω). When the GE Multilin TCS2 thermal capacity meter is connected to the terminals, select the 0 to 1 mA range.
  • Page 34 Therefore, it is imperative that the serial master and 239 are both at the same ground potential. This is accomplished by joining 485 ground terminal 17 of every unit together and grounding it at the master only.

  • Page 35: Dielectric Strength Testing

    It may be required to test a complete motor starter for dielectric strength with the 239 installed. This is also known as “flash” or “hipot” testing. The 239 is rated for 1530 V AC isolation for 1 minute (or 1836 V AC for 1 second) between relay contacts, CT inputs, control power inputs and safety ground terminal 13.
  • Page 36 CHAPTER 2: INSTALLATION FIGURE 2–9: Dielectric Strength Testing 2–30 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 37: Front Panel

    Control keys are used to select the appropriate message for entering setpoints or displaying measured values. Alarm and status messages are automatically displayed when required. Indicator LEDs provide important status information at all times. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 3–1 Courtesy of NationalSwitchgear.com...

  • Page 38: Display

    • Status messages • Fault conditions STATUS INDICATORS TRIP AUXILIARY PICKUP • Trip: Lit when the 239 detects a trip. • Alarm: Lit when the 239 detects an alarm. • Auxiliary: Lit when the auxiliary relay is operated. ALARM SERVICE COMMUNICATE •...

  • Page 39: Status Indicators

    If any one of keys on the 239 keypad is pressed or an alarm/trip is present the display brightness will automatically become 100%. If the default messages time is set to OFF, the 239 display will dim to the set brightness level after 5 minutes have elapsed since one of the keys on the keypad was last pressed.

  • Page 40: Keys

    If there is activity on the serial port but the 239 is not receiving valid messages for its internally programmed address the indicator will flash. This could...
  • Page 41 To select messages within a subgroup press . To back out of the subgroup or access the previous message, press MESSAGE MESSAGE 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 3–5 Courtesy of NationalSwitchgear.com...
  • Page 42 When a setpoint is displayed calling for a yes/no response, each time VALUE is pressed, the “Yes” becomes a “No” or the “No” becomes a “Yes.” VALUE Similarly, for multiple choice selections, each time VALUE VALUE 3–6 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 43: Setpoint Access

    • SCADA ENTRY: Details of the complete communication protocol for reading and writing setpoints are given in 239 Communications Guide. A SCADA system connected to the RS485 terminals can be customer programmed to make use of any of the communication commands for remote setpoint programming, monitoring and control.

  • Page 44: Default Messages

    CHAPTER 3: OPERATION 3.1.6 Default Messages Up to 5 default messages can be selected to automatically scan sequentially when the 239 is left unattended. If no keys are pressed for the default message time set with S1:239 SETUP\PREFERENCES\DEFAULT MESSAGE TIME, then the currently displayed message will automatically be overwritten by the first default message.
  • Page 45 DISPLAYED FOR 3 SECONDS WHEN STORE KEY AND RESET KEY ARE PRESSED IN SEQENCE Each 239 is pre-programmed with five default messages as shown below. Note, each time the factory setpoints are reloaded the user programmed default messages are overwritten with these messages.
  • Page 46 CHAPTER 3: OPERATION 3–10 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 47: Setpoint Entry Methods

    In order to safeguard against the installation of a relay whose setpoints have not been entered, the 239 will trip and lock out until the values have been entered for these setpoints. A warning message “CAUSE OF LAST TRIP: PARAMETERS NOT SET” along with a trip condition is present until the 239 is programmed with these critical setpoints.
  • Page 48 ] PROGRAMMABLE ] SWITCH INPUTS ] MESSAGE ] SIMULATION ] PRODUCT OPTIONS ] THERMISTOR ] SIMULATION ] RTD SIMULATION ]GE POWER MANAGEMENT ]USE ONLY FIGURE 4–1: Setpoint Message Organization 4–12 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 49: S1: 239 Setup

    CHAPTER 4: PROGRAMMING S1: 239 Setup Settings to configure the 239 are entered here. This includes user preferences, RS485 communication port, loading of factory defaults, and user programmable messages. SETPOINT SETPOINT ]] SETPOINTS ]] SETPOINTS ]] S1 239 SETUP ]] S2 SYSTEM SETUP...

  • Page 50: Preferences

    . When this setpoint is turned off, the currently displayed message will remain displayed until a condition such as a trip alarm, or key press forces the 239 to display a different message. 4–14 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL...

  • Page 51: Analog Output

    , the S1: 239 SETUP\PREFERENCES\DEFAULT MESSAGE TIME brightness will adjust to set level after 5 minutes have elapsed since the 239 keys were last pressed. The 239 status must also be NORMAL to display the set brightness. If no default message is programmed, the display brightness will adjust to the set level...

  • Page 52: Rs485 Serial Port

    STORE to the 239. It is a good idea to first load factory defaults when replacing a 239 to ensure all the settings are defaulted to reasonable values. 4–16 239 MOTOR PROTECTION RELAY –...

  • Page 53: Programmable Message

    Programmable Message • PROGRAMMABLE MESSAGE: A 40-character message can be programmed using the keypad, or via the serial port using the 239PC software. Using the 239 keypad, a new message can be written over the existing message as shown below. VALUE...

  • Page 54: Product Options

    Use the value up or down keys to select the correct character. When the entire passcode has been entered correctly press the store key. The 239 will then wait 2 seconds before resetting. See flow diagram below.
  • Page 55 MODEL INFORMATION Step 5: Verify correct MODs were installed: MOD NUMBER(S): 0 Located in ACTUAL VALUES page A3 under the sub-heading MODEL INFORMATION Step 6: Proceed with 239 setup. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 4–19 Courtesy of NationalSwitchgear.com...

  • Page 56: S2: System Setup

    Range: NO, YES DISABLE STARTS: ] END OF PAGE S2 DESIGNATES SETPOINTS THAT MUST BE PROGRAMMED BEFORE THE "TRIP" OUTPUT WILL RESET FIGURE 4–3: Setpoints Page 2 – System Setup 4–20 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 57: Ct Inputs

    CT ratio is set off. When off is the CT value, the 239 is forced to a trip state as a safety precaution until a valid CT value is entered. Ensure that the CT is connected to the correct 1 A or 5 A terminals to match the CT secondary.
  • Page 58 LRT Hot = Locked Rotor Time Hot, is defined as the locked rotor time when the motor has been running at FLC for a time sufficient for the motor temperature to reach a steady state value. 4–22 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 59 , or 100 – 85 = 15% using the example value given above. In between these two extremes there is a linear relationship; the 239 thermal model covers the entire range of motor temperatures: cold—cool—warm—hot. The steady state value of...

  • Page 60: S3: Output Relays

    Contact configuration is opposite to that shown in FIGURE 2–3: Typical Wiring Diagram on page 2–18 for relays programmed as failsafe when control power is applied 4–24 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 61: Trip Relay

    NON-FAILSAFE for a non-trip condition and energized for a trip. No trip occurs if control power to the 239 is lost but there will be no motor protection while this condition is present. Set the mode to (the relay coil is normally energized for a non-trip condition going...
  • Page 62 ALARM TRIP 4–26 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 63: S4: Protection

    PICKUP ≥ 1.1 x FLC Range: 0 to 6000, UNLIMITED INHIBIT ON START MESSAGE L Step: 1 s FOR: UNLIMITED s MESSAGE M SEE NEXT PAGE SEE NEXT PAGE 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 4–27 Courtesy of NationalSwitchgear.com...
  • Page 64 ALARM PICKUP 5 % | HOT MOTOR Range: 1 to 100; Step: 1% THERMAL CAPACITY MESSAGE ▲ USED ALARM OFF % MESSAGE ▼ SEE NEXT PAGE SEE NEXT PAGE 4–28 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 65 RESISTANCE: 5.0 kΩ MESSAGE ▲ Range: 0.1 to 30.0 THERMISTOR COLD Step: 0.1 kΩ RESISTANCE: 0.3 kΩ MESSAGE ▼ Range: ON, OFF THERMISTOR NOT CONNECTED ALARM: OFF SEE NEXT PAGE 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 4–29 Courtesy of NationalSwitchgear.com...
  • Page 66 | RTD SENSOR FAILURE Range: ON, OFF RTD SENSOR FAILURE ALARM: OFF MESSAGE MESSAGE DESIGNATES SETPOINTS THAT ARE ONLY VISIBLE IF SEE NEXT PAGE SEE NEXT PAGE RTD OPTION IS INSTALLED 4–30 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 67 Step: 0.1 x CT PICKUP ≥ 10 x CT 2nd PHASE S/C Range: 10 to 60000, INST Step: 10 ms DELAY: INST ms SEE NEXT PAGE SEE NEXT PAGE 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 4–31 Courtesy of NationalSwitchgear.com...
  • Page 68 PICKUP ≥ 10 x CT Range: 10 to 60000, INST 4th PHASE S/C Step: 10 ms DELAY: INST ms ] END OF PAGE 4 FIGURE 4–5: Setpoints Page 4 – Protection 4–32 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 69: Overload

    Timed Overload Curves on page 4–34 and the next lowest curve selected. Curve points are also shown in tabular form in Table 4–2: 239 Phase Overload Trip Times (Seconds) on page 4–34. Points for a selected curve can be plotted directly on curves for associated equipment to facilitate a coordination study.
  • Page 70 100000 10000 1000 TRIP TIME (seconds) MULTIPLIER 10.0 100.0 CURRENT (I/Ipu) FIGURE 4–6: Phase Timed Overload Curves Table 4–2: 239 Phase Overload Trip Times (Seconds) CURVE MULTIPLE OF MOTOR FULL LOAD CURRENT NUMBER 1.03 1.05 1437 416.7 70.0 29.2 16.7 10.9...

  • Page 71: Phase S/C

    CHAPTER 4: PROGRAMMING Table 4–2: 239 Phase Overload Trip Times (Seconds) CURVE MULTIPLE OF MOTOR FULL LOAD CURRENT NUMBER 1.03 1.05 14369 8537 4166.8 699.9 291.6 166.6 109.3 58.3 36.43 24.98 13.88 8.83 7.29 15806 9391 4583.5 769.9 320.7 183.3 120.3...

  • Page 72: Immediate Overload

    S4: PROTECTION\PHASE CURRENT\PHASE S/ setpoint represents the intentional delay added to the detection C\PHASE S\C DELAY and output relay activation delays of the 239. When this setpoint is set to the 239 INST will trip within 45 ms of the onset of the short circuit. Both the short circuit trip level and time delay should be set to co-ordinate with other system protective relays to minimize equipment shutdown during a high current fault.

  • Page 73: Undercurrent

    4.5.6 Unbalance • UNBALANCE TRIP: Unbalanced three phase supply voltages are a major cause of induction motor thermal damage. Unbalance can be caused by a variety of factors 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 4–37 Courtesy of NationalSwitchgear.com...
  • Page 74 UNBALANCE TRIP PICKUP setpoint value and remains this way for the time delay programmed in this setpoint, the respective relay will activate and the respective warning message will be displayed. 4–38 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 75: Hot Motor

    Ground faults can occur in otherwise good motors because of environmental conditions. Moisture or conductive dust, which are often present in mines, can provide an 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 4–39 Courtesy of NationalSwitchgear.com...
  • Page 76 The relay(s) selected in this setpoint along with the respective status indicator(s) on the front panel of the 239 will be active upon a ground fault trip. • GROUND PRIMARY TRIP PICKUP: Ground fault trip when enabled in...
  • Page 77 START setpoint described below is used until the 239 determines whether the motor is RUNNING or STARTING. Refer to Section 5.2: A1: Status on page –59 for details on how the 239 detects a start condition. • GROUND TRIP DELAY ON START: This delay is used when the motor is in a STARTING condition.

  • Page 78: 4.5.10 Temperature

    CHAPTER 4: PROGRAMMING Refer to Section 5.2: A1: Status on page –59 for details on how the 239 detects a start condition. 4.5.10 Temperature Thermistor Insulation breakdown of the stator windings due to overheating is the main cause of motor failure under overload conditions.
  • Page 79 THERMISTOR NOT CONNECTED ALARM: If the thermistor becomes open circuited during use, the ACTUAL VALUES display for the thermistor will be "NOT CONNECTED". The 239 relay will generate an alarm to warn of the fault if this setpoint is enabled. RTD 1-3 (option)
  • Page 80 ACTUAL VALUES display for that RTD will be "no RTD". Readings from the disconnected RTD will then be ignored for overtemperature protection. The 239 relay will generate an alarm to warn of the faulty RTD if this setpoint is enabled. Setpoints...
  • Page 81 214.8 Ω 269.9 Ω 15.61 Ω 168.5 Ω 223.2 Ω 280.8 Ω 16.00 Ω 172.2 Ω 231.6 Ω 291.9 Ω 16.38 Ω 175.8 Ω 240.0 Ω 303.5 Ω 16.78 Ω 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 4–45 Courtesy of NationalSwitchgear.com...

  • Page 82: Switch Inputs

    OPTION SWITCH 1-2 DELAY: A delay of 0.0 to 60.0 seconds is programmed here. The switch must remain closed for the programmed length of time in order for the 239 to detect the condition. If the switches are not used then they should be set to off in PROTECTION\ SWITCH INPUTS\OPTION SWITCH 1-2\OPTION SWITCH 1-2 FUNCTION •...

  • Page 83: Multi-Speed Motor

    – closure of the contact will signify that the motor is in Speed 2. If the input is open, it signifies that the motor is in Speed 1. This allows the 239 to determine which setpoints should be active at any given point in time.
  • Page 84 CHAPTER 4: PROGRAMMING FIGURE 4–7: Two Speed Motor Wiring Diagram 4–48 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 85: S5: Testing

    Range: 0.0 to 120.0, OFF ANALOG OUTPUT FORCED Step: 0.1 % TO: OFF % MESSAGE ▲ MESSAGE ▼ DESIGNATES SETPOINTS THAT ARE ONLY VISIBLE IF ANALOG SEE NEXT PAGE OUTPUT OPTION IS INSTALLED 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 4–49 Courtesy of NationalSwitchgear.com...
  • Page 86 Range: 0 to 9999 step 1 ] GE POWER MANAGEMENT SERVICE PASSCODE: ] USE ONLY DESIGNATES SETPOINTS THAT ARE ONLY VISIBLE IF RTD OPTION IS INSTALLED FIGURE 4–8: Setpoints Page 5 – Testing 4–50 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 87: Test Configuration

    LOCKED ROTOR CURRENT SAFE STALL TIME setpoints. When this feature is enabled the 239 assumes the motor is in RUN condition any time current is present even on initial startup inrush current. EXAMPLE: S2: SYSTEM SETUP\MOTOR DATA\MOTOR FULL LOAD CURRENT: 100 A S2: SYSTEM SETUP\MOTOR DATA\SAFE STALL TIME COLD: 20.0 S...

  • Page 88: Current Simulation

    Simulated currents can be forced instead of the actual currents sensed by the external CTs connected to the 239. This allows verification of all current related relay functions such as timed overload trip. It also allows verification that external trip and alarm wiring is responding correctly.

  • Page 89: Analog Output Simulation

    = 85 A Now set . The relay will see this S5: TESTING\CURRENT SIMULATION\SIMULATION: ON simulated current in all 3 phases instead of the actual input current. The 239 should trip after a time determined by S4: PROTECTION\PHASE CURRENT\UNBALANCE\PHASE UNBALANCE DELAY: setpoint.

  • Page 90: Switch Inputs Simulation

    Set this setpoint to after simulation is complete. As a safeguard, simulation will automatically turn off if: •power to the 239 is turned off and on •time programmed in the...

  • Page 91: Thermistor Simulation

    Set this setpoint to after simulation is complete. As a safeguard, simulation will automatically turn off if: •power to the 239 is turned off and on •the time programmed in setpoint...

  • Page 92: Rtd Simulation

    SIMULATION ON/OFF removed from the 239. 4.8.8 GE Multilin Use Only • SERVICE PASSCODE CODE: These messages are accessed by GE Multilin personnel only for testing and service. 4–56 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 93: Actual Values Viewing

    MESSAGE messages. A detailed description of each displayed message in these groups is given in the sections that follow. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 5–57 Courtesy of NationalSwitchgear.com...
  • Page 94 ] FIRWARE VERSIONS ] LAST TRIP DATA ] MOTOR CAPACITY ] MODEL INFORMATION ] MOTOR STATISTICS ] TEMPERATURE ] SWITCH STATUS ] PROGRAMMABLE ] MESSAGE FIGURE 5–1: Actual Values Message Organization 5–58 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 95: A1: Status

    THERMISTOR NOT CONNECTED THERMAL CAPACITY USED ALARM COMMUNICATION FAILURE ALARM OPTION SWITCH 1 ALARM OPTION SWITCH 2 ALARM MECHANICAL JAM ALARM BREAKER FAILURE ALARM NO ACTIVE ALARM SEE NEXT PAGE 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 5–59 Courtesy of NationalSwitchgear.com...

  • Page 96: General

    S2 SYSTEM SETUP\MOTOR DATA\MOTOR FULL LOAD CURRENT within 300 ms (worst case) of initial detection of current by the 239. • TIME TO TRIP: This message is displayed when a trip condition is in progress. The...

  • Page 97: Motor Statistics

    NOTE: If the switch simulation is turned on in S5:TESTING\SWITCH SIMULATION\SIMULATION , the status shown in these messages will be of the simulated inputs. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 5–61 Courtesy of NationalSwitchgear.com...

  • Page 98: Programmable Message

    Programmable Message A 40 character message can be programmed using the keypad or via the serial port using the 239PC software. See 4.2: S1: 239 Setup on page –13 for an example of programming this message using the keypad. This message can be used for identification purposes such as company name, site name, station name, relay identification number, etc.

  • Page 99: A2: Metering

    DESIGNATES ACTUAL VALUES THAT WILL ONLY BE DISPLAYED IF RTD OPTION IS INSTALLED AND THE CORRESPONDING RTD FEATURE IS TURNED ON. FIGURE 5–3: Actual Values Page 2 – Metering 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 5–63 Courtesy of NationalSwitchgear.com...

  • Page 100: Current

    When the thermal capacity used equals 100%, the 239 trips the motor since the motor is considered to be running at its maximum temperature. With no overloads present,...

  • Page 101: Temperature

    31.5 kΩ, alarm message will be displayed. Therefore, if the THERMISTOR NOT CONNECTED thermistor is not being used, the function must be set to off. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 5–65 Courtesy of NationalSwitchgear.com...

  • Page 102: A3: Product Info

    MAIN PROGRAM VERSION MODIFICATION . The identifies the firmware installed FILE NUMBER MAIN PROGRAM VERSION internally in the flash memory. The title page of this instruction manual states the 5–66 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 103: Identification

    • DATE OF MANUFACTURE: This is the date the 239 was final tested at GE Multilin. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 5–67...
  • Page 104 CHAPTER 5: MONITORING 5–68 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 105: Hardware And Software Requirements

    • 64 MB of RAM (256 MB recommended) • Minimum of 50 MB hard disk space (200 MB recommended) If EnerVista 239 Setup is currently installed, note the path and directory name. It may be required during upgrading. The EnerVista 239 Setup software is included on the GE enerVista CD that accompanied the 239.
  • Page 106 Click the IED Setup section of the Launch Pad window. In the enerVista LaunchPad window, click the Add Product button and select the “239 Motor Protection Relay” as shown below. Select the “Web” option to ensure the most recent software release, or select “CD”...
  • Page 107 CHAPTER 6: User Interface Click Finish to end the installation. The 239 device will be added to the list of installed IEDs in the enerVista Launchpad window, as shown below. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 6–71 Courtesy of NationalSwitchgear.com...

  • Page 108: Connecting Enervista 239 Setup To The Relay

    Click the OK button when complete. The new site will appear in the upper-left list in the EnerVista 239 Setup window. Click the Add Device button to define the new device.

  • Page 109: Configuring Ethernet Communications

    Enter the physical communications parameters (baud rate and parity settings) in their respective fields. Click the Read Order Code button to connect to the 239 device and upload the order code. If an communications error occurs, ensure that the 239 serial communications values entered in the previous step correspond to the relay setting values.
  • Page 110 “Substation 2” as the site name. Click the OK button when complete. The new site will appear in the upper-left list in the EnerVista 239 Setup window. Click the Add Device button to define the new device. Enter the desired name in the Device Name field and a description (optional) of the site.

  • Page 111: Connecting To The Relay

    CHAPTER 6: User Interface The 239 Site Device has now been configured for Ethernet communications. Proceed to the following section to begin communications. 6.2.3 Connecting to the Relay Now that the communications parameters have been properly configured, the user can easily connect to the relay.
  • Page 112 Other setpoint and commands windows can be displayed and edited in a similar manner. Actual values windows are also available for display. These windows can be locked, arranged, and resized at will. Refer to the EnerVista 239 Setup Help File for additional information about the using Note the software.

  • Page 113: Working With Setpoints And Setpoint Files

    6.3.1 Engaging a Device The EnerVista 239 Setup software may be used in on-line mode (relay connected) to directly communicate with a 239 relay. Communicating relays are organized and grouped by communication interfaces and into sites. Sites may contain any number of relays selected from the SR or UR product series.
  • Page 114 Click on Save to save the values into the 239. Click OK to accept any changes and exit the window. Otherwise, click Restore to retain previous values and exit.

  • Page 115: File Support

    Opening any EnerVista 239 Setup file will automatically launch the application or provide focus to the already opened application. If the file is a settings file (has a ‘239’ extension) which had been removed from the Settings List tree menu, it will be added back to the Settings List tree.
  • Page 116 Adding Setpoints Files to the Environment The EnerVista 239 Setup software provides the capability to review and manage a large group of setpoint files. Use the following procedure to add a new or existing file to the list.
  • Page 117 CHAPTER 6: User Interface Creating a New Settings File The EnerVista 239 Setup software allows the user to create new Settings files independent of a connected device. These can be uploaded to a relay at a later date. The following manual procedure illustrates how to create new Settings Files.
  • Page 118 File on page 6–84 for instructions on loading this setpoint file into the 239. Printing Setpoints and Actual Values The EnerVista 239 Setup software allows the user to print partial or complete lists of setpoints and actual values. Use the following procedure to print a list of setpoints: 6–82 239 MOTOR PROTECTION RELAY –...
  • Page 119 A complete list of actual values can also be printed from a connected device with the following procedure: Establish communications with the desired 239 device. From the main window, select the File > Print Settings menu item. The Print/Export Options dialog box will appear.
  • Page 120 6–82 for instructions on changing the revision number of a setpoint file. The following procedure illustrates how to load setpoints from a file. Before loading a setpoints file, it must first be added to the EnerVista 239 Setup environment as described in Adding Setpoints Files to the Environment on page 6–80.

  • Page 121: Upgrading Relay Firmware

    6.4.2 Saving Setpoints to a File Before upgrading firmware, it is very important to save the current 239 settings to a file on your PC. After the firmware has been upgraded, it will be necessary to load this file back into the 239.

  • Page 122: Upgrading And Loading Settings Files

    The EnerVista 239 Setup software now prepares the 239 to receive the new firmware file. The 239 will display a message indicating that it is in Upload Mode. While the file is being loaded into the 239, a status box appears indicating how much of the new firmware file has been transferred and how much is remaining, as well as the upgrade status.
  • Page 123 Load the converted settings file(s) into the relay. To view the procedure to load setpoints from a settings file to the relay, refer to the section: Loading Setpoints from a File, shown above. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 6–87 Courtesy of NationalSwitchgear.com...

  • Page 124: Advanced Enervista 239 Setup Features

    6.5.1 Trending Trending from the 239 is accomplished via EnerVista 239 Setup. Many different parameters can be trended and graphed at sampling periods from 1 second up to 1 hour. The parameters which can be trended by EnerVista 239 Setup are: •...
  • Page 125 Ensure that the Write Trended Data to File box is checked, and that the Sample Rate is at a minimum of 5 seconds. Set the file capacity limit to the amount of memory available for trended data. 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 6–89 Courtesy of NationalSwitchgear.com...

  • Page 126: Modbus User Map

    6.5.2 Modbus User Map The EnerVista 239 Setup software provides a means to program the 239 User Map (Modbus addresses 0180h to 01F7h). Refer to User Definable Memory Map Area on page 9– 293 for additional information on the User Map.
  • Page 127 Each group will be opened on a separate tab. The windows can be rearranged to maximize data viewing as shown in the following figure (showing actual current, voltage, and power values tiled in the same window): 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 6–91 Courtesy of NationalSwitchgear.com...

  • Page 128: Plug And Play Example

    6.6.1 Plug and Play Example EnerVista Viewpoint is an optional software package that puts critical 239 information onto any PC with plug-and-play simplicity. EnerVista Viewpoint connects instantly to the 239 via serial, ethernet or modem and automatically generates detailed overview, metering, power, demand, energy and analysis screens.
  • Page 129 CHAPTER 6: User Interface Click the OK button when complete. The new site will appear in the upper-left list in the EnerVista 239 Setup window. Click the Add Device button to define the new device. Enter the desired name in the Device Name field and a description (optional) of the site.
  • Page 130 CHAPTER 6: User Interface FIGURE 6–5: ‘Plug and Play’ Dashboard Click the Dashboard button below the 239 icon to view the device information. We have now successfully accessed our 239 through EnerVista Viewpoint. FIGURE 6–6: EnerVista 239 Plug and Play Screen (Example) For additional information on EnerVista viewpoint, please visit the EnerVista website at http://www.EnerVista.com.

  • Page 131: Primary Injection Testing

    Operation of the entire relay system, except the phase and ground CTs, can be checked by applying input signals to the 239 from a secondary injection test set as described in the following sections.

  • Page 132: Secondary Injection Testing

    Tests should be performed to verify the correct operation and wiring. All functions are firmware driven and this testing will verify correct firmware/hardware interaction. FIGURE 7–1: SECONDARY INJECTION TEST SETUP 7–96 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 133: Phase Current Accuracy

    CHAPTER 7: TESTING Phase Current Accuracy Any phase current protection is based on the ability of the 239 to read phase input currents accurately to ±2% of full scale. Perform the steps below to test the phase current accuracy. Alter the following setpoint.

  • Page 134: Phase Current Overload

    After viewing A2: METERING\MOTOR CAPACITY A2: METERING\MOTOR CAPACITY , momentarily short the Emergency Restart terminals and press the reset key to reset the unit. 7–98 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 135: Phase Unbalance Alarm

    = RMS current in any phase with maximum deviation from the average current (I = motor full load current = phase A current = phase B current = phase C current 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 7–99 Courtesy of NationalSwitchgear.com...
  • Page 136 – 73 91 ⎛ ⎞ ⎛ ⎞ – -------------------- - -------------------- - × 100% × 100% ⎝ ⎠ ⎝ ⎠ Therefore, the percent unbalance in this case is 18%. 7–100 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 137: Ground Current Accuracy

    Alter the following setpoint: CORE BAL 50:0.025 S2: SYSTEM SETUP\CT INPUTS\GROUND SENSING: Inject the values shown below as primary values into a GE Multilin 50:0.025 Core Balance CT. View the readings in A2: METERING\CURRENT\GROUND CURRENT verify with the expected readings shown in the following table.

  • Page 138: Ground Alarm And Trip

    PHASE CT PRIMARY ) is reached, the 239 trip relay will activate and the TRIP LED will become lit. The 239 will display CAUSE OF LAST TRIP: GROUND FAULT message. Turn the ground current off and press the reset key to reset the trip relay.

  • Page 139: Switch Input

    CHAPTER 7: TESTING Switch Input To verify the operation of each 239 switch input, go to A1: STATUS\SWITCH STATUS and with the keys, view the status of each switch input MESSAGE MESSAGE one at a time. Open and close each switch input and note that the display reflects the present status of the input terminals.

  • Page 140: Analog Output

    FORCED TO results on the DC ammeter. Verify the meter results with expected results shown in the table below. If the 239 is turned off or 15 minutes have expired since was turned on this setpoint will TESTING\ANALOG OUTPUT\SIMULATION\SIMULATION automatically turn off to disable analog output simulation.

  • Page 141: Thermistor Alarm

    With the variable resistor initially set to zero start increasing the resistance until a thermistor alarm occurs. Verify that the ALARM LED becomes lit and a THERMISTOR ALARM message is displayed by the 239. Remove the variable resistor and measure its resistance with an ohmmeter to verify...

  • Page 142: 7.10 Rtd Measurement

    METERING\TEMPERATURE\BEARING RTD 1 TEMPERATURE: the Resistance vs. Temperature table. Repeat the above steps with RTD 2 and RTD 3 inputs. 7–106 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 143: 7.11 Power Failure / Non-Volatile Memory

    Slowly decrease the AC voltage applied to a 239 relay until the UNDERVOLTAGE message appears on the 239 display. At this instant all output relays will go to their de-energized state and the SERVICE LED turns on. This phenomenon should occur after the voltage has decreased below 70 V.

  • Page 144: 7.12 Routine Maintenance Verification

    Other trip or alarm conditions using ground current data and RTD temperature data can be simulated using the procedures outlined in the previous sections. To test the operation of the 239 output relays and the switchgear connected to them setpoint is used.
  • Page 145 CHAPTER 7: TESTING FIGURE 7–2: 239 Hardware Block Diagram 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL 7–109 Courtesy of NationalSwitchgear.com...
  • Page 146 CHAPTER 7: TESTING 7–110 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

  • Page 147: Appendix 239 Warranty

    24 months from date of shipment from factory. In the event of a failure covered by warranty, GE Multilin will undertake to repair or replace the relay providing the warrantor determined that it is defective and it is returned with all transportation charges prepaid to an authorized service centre or the factory.
  • Page 148 CHAPTER A: APPENDIX A–2 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 149 ANALOG OUTPUT TYPE ................... 4-15 APPLICATIONS ....................1-6 AUTO RESET OVERLOAD TRIPS ..............4-34 AUXILIARY ACTIVATION .................. 4-25 AUXILIARY FUNCTION ..................4-26 AUXILIARY OPERATION ................... 4-25 AUXILIARY RELAY ..................... 4-25 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL I–1 Courtesy of NationalSwitchgear.com...
  • Page 150 ......................4-16 DIELECTRIC STRENGTH TESTING ............2-29, 2-30 DIMENSIONS ....................2-14 DISABLE STARTS ....................4-23 DISPLAY ......................3-2 ENERVISTA VIEWPOINT WITH THE 369 ............6-92 ENTER PASSCODE .................... 4-18 I–2 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 151 IMMEDIATE OVERLOAD ................... 4-36 IMMEDIATE OVERLOAD ALARM ..............4-36 IMMEDIATE OVERLOAD ALARM PICKUP ............4-36 INHIBIT ON START FOR ................... 4-36 INSTALLATION ....................2-13 upgrade ......................6-69 KEYS ........................3-4 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL I–3 Courtesy of NationalSwitchgear.com...
  • Page 152 OVERLOAD PICKUP INHIBIT ................4-21 OVERLOAD RESET .................... 5-60 OVERLOAD TESTING ..................7-98 OVERLOAD TRIP AUTO RESET ................ 4-34 OVERLOAD TRIP TIME calculating ....................... 4-33 OVERLOAD TRIP TIME CALCULATION ............4-33 I–4 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 153 EnerVista 369 setup ............ 6-72, 6-73 RS485 SERIAL PORT ..................4-16 RTD 1-3 ......................4-43 RTD MEASUREMENT TESTS ................7-106 RTD RESISTANCE VS. TEMPERATURE ............4-44 RTD SENSOR FAILURE ..................4-44 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL I–5 Courtesy of NationalSwitchgear.com...
  • Page 154 ......................4-25 undercurrent ....................4-37 SETPOINTS PAGE 1 – 239 SETUP ..............4-14 SETPOINTS PAGE 2 – SYSTEM SETUP ............4-20 SETPOINTS PAGE 3 – OUTPUT RELAYS ............4-24 I–6 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...
  • Page 155 ....................4-42 testing ......................7-105 THERMISTOR SIMULATION ................4-55 TIME TO OVERLOAD RESET ................5-60 TIME TO TRIP ....................5-60 TIMED OVERLOAD CURVES ................4-34 TRENDING ......................6-88 TRIP 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL I–7 Courtesy of NationalSwitchgear.com...
  • Page 156 ..................... 4-37 actual values ....................5-61 calculating .................... 4-38, 7-100 formula ......................5-64 testing ......................7-99 UNDERCURRENT ....................4-37 UPGRADING FIRMWARE ................. 6-85 WARRANTY ......................A-1 WIRING DIAGRAM .................... 2-18 I–8 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL Courtesy of NationalSwitchgear.com...

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