Generator Protection M 3420

Transcription

1 PROTECTION Generator Protection M 3420 Integrated Protection System for Generators of All Sizes Unit shown with optional M 3920 Target Module and M 3931 HMI (Human-Machine Interface) Module Microprocessor-based Generator Protection system provides 17 protective relay functions Individually programmable input contacts can be programmed to activate any one of eight output contacts Local and remote communications capability for both monitoring and control functions Industry Leader Since 1969 Made in the USA

2 Protective Functions Overexcitation (V/Hz) protection (24) Phase Undervoltage protection (27) Sensitive dual-setpoint, reverse power detection suitable for sequential tripping (32) Dual-zone, offset-mho loss-of-field protection (40) Sensitive negative-sequence overcurrent protection and alarming (46) Instantaneous overcurrent () protection Inadvertent generator energizing protection (/27) Generator breaker failure protection (BF) Neutral inverse time overcurrent (51N) Instantaneous overcurrent (N) protection Three-phase inverse time overcurrent (51V) Phase overvoltage (59) Generator ground fault protection (59N) VT fuse-loss detection and blocking (60FL) Four-step over/underfrequency protection (81) Generator phase differential (87) Ground differential (87GD) protection Standard Features Eight programmable outputs and six programmable inputs Oscillography recording 32-target storage Metering of all measured parameters Two RS-232 and one RS-485 communications ports Standard 19" rack-mount design Removable printed circuit board and power supply Both and 60 Hz models available Both 1 and 5 A rated CT inputs available Additional trip inputs for externally connected devices M 3800A IPScom Communications Software S-3400 IPScom Communications Software for Windows 7 or later IRIG-B time synchronization Includes Modbus and BECO 2200 protocols Optional Features Redundant power supply M 3920 Target Module M 3931 HMI Module M 3801A IPSplot Oscillograph Analysis Software 4-Wire RS-485 Connection 2

3 PROTECTIVE FUNCTIONS M 3420 Generator Protection Relay Device Setpoint Number Function Ranges Increment Accuracy 24 Volts/Hz Definite Time Pickup #1, #2 100 to 200% 1% 1% Time Delay #1, #2 30 to 8160 Cycles 1 Cycle +25 Cycles Inverse Time Characteristic Curves Inverse Time #1 #4 Pickup 100 to 200% 1% 1% Time Dial: Curve #1 1 to Time Dial: Curves #2 #4 0 to Reset Rate 1 to 999 Sec. 1 Sec. 3 Cycles or 1% (from threshold of trip) The percent pickup is based on nominal VT secondary voltage and nominal system frequency settings. The pickup accuracy stated is only applicable from 10 to 80 Hz, 0 to 180 V, and 100 to 1% V/Hz. 27 RMS Undervoltage Pickup #1, #2 5 to 200 V 1 V 0.5 V or 0.5% 0.8 V or 0.75%* Time Delay #1, #2 1 to 8160 Cycles 1 Cycle +20 Cycles or 1%** * When both RMS and line ground to line line is selected. **When RMS (total waveform) is selected, timing accuracy is +20 cycles or 1%; when DFT (fundamental RMS) is selected, accuracy is 1 to +3 cycles or 1%. 32 Directional Power Pickup #1, # to PU PU PU or 2% Time Delay #1, #2 1 to 8160 Cycles 1 Cycle +16 Cycles or 1% The per-unit pickup is based on nominal VT secondary voltage and nominal CT secondary current settings. 40 Loss of Field (dual-zone offset-mho characteristic) Circle Diameter #1, #2 0.1 to Ω 0.1 Ω 0.1 Ω or 5% (0.5 to 0.0 Ω) ( 0.5 Ω or 5%) Offset #1, #2.0 to.0 Ω 0.1 Ω 0.1 Ω or 5% ( 2.0 to 2.0 Ω) ( 0.5 Ω or 5%) Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or 1% Voltage Control 5 to 200 V 1 V 0.5 V or 0.5% (positive sequence) Directional Element Fixed at 13 Voltage control for each zone can be individually enabled. Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondary rating. 3

4 PROTECTIVE FUNCTIONS (cont.) Device Setpoint Number Function Ranges Increment Accuracy 46 Negative Sequence Overcurrent Definite Time Pickup 3 to 100% 1% 0.5% at 5 A ( 0.5% at 1 A) Time Delay 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles Inverse Time Pickup 3 to 100% 1% 0.5% at 5 A ( 0.5% at 1 A) Time Dial Setting (K= I 22 t) 1 to % Definite Maximum Time to Trip 600 to 65,0 Cycles 1 Cycle 1 to +3 Cycles or 1% Reset Time (Linear) Pickup is based on the nominal CT secondary current. Instantaneous Overcurrent 4 minutes (from threshold of trip) Pickup 1.0 to A 0.1 A 0.1 A or 3% (0.2 to 48.0 A) ( 0.02 A or 3%) Trip Time Response 2 Cycles 2 Cycles Instantaneous Overcurrent, Neutral N Pickup 1.0 to A 0.1 A ±0.1 A or ±3% (0.2 to 48.0 A) (±0.02 A or ±3%) Trip Time Response 2 Cycles ±2 Cycles Inadvertent Energizing / Overcurrent Pickup 0. to A 0.01 A ±0.1 A or ±2% (0.10 to 3.00 A) (±0.02 A or ±2%) Undervoltage Pickup 40 to 130 V 1 V ±0.5 V Pick-up Time Delay 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or ±1% Drop-out Time Delay 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or ±1% BF BF-Ph BF-N Breaker Failure Pickup Phase Current 0.10 to A 0.01 A ±0.1 A or ±2% (0.02 to 2.00 A) (±0.02 A or ±2%) Neutral Current 0.10 to A 0.01 A ±0.1 A or ±2% (0.02 to 2.00 A) (±0.02 A or ±2%) Time Delay 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or ±1% BF can be initiated from designated output contacts or status inputs. Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondary rating. 4

5 PROTECTIVE FUNCTIONS (cont.) Device Setpoint Number Function Ranges Increment Accuracy Inverse Time Overcurrent, Neutral 51N Characteristic Curve Definite Time/Inverse/Very Inverse/Extremely Inverse Tap Setting 0.5 to A 0.01 A (0.10 to 2.40 A) Time Dial Setting 0.5 to ±3 Cycles or ±3% Inverse Time Overcurrent, with Voltage Control or Voltage Restraint 51V Characteristic Curve Definite Time/Inverse/Very Inverse/Extremely Inverse Tap Setting 0.5 to A 0.01 A (0.10 to 2.40 A) Time Dial Setting 0.5 to ±3 Cycles or ±3% Voltage Control (VC) 5 to 200 V 1 V ±0.5 V or ±0.5% or Voltage Restraint (VR) Linear Restraint 59 RMS Overvoltage Pickup #1, #2 5 to 200 V 1 V 0.5 V or 0.5% 0.8 V or 0.75%* Time Delay #1, #2 1 to 8160 Cycles 1 Cycle +20 Cycles or 1%** Accuracy applies to values below 180 V pickup. * When both RMS and line ground to line line is selected. **When RMS (total waveform) is selected, timing accuracy is +20 cycles or 1%; when DFT (fundamental RMS) is selected, accuracy is 1 to +3 cycles or 1%. RMS Overvoltage, Neutral 59N Pickup #1, #2 5.0 to V 0.1 V ±0.5 V or ±0.5% Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or ±1% VT Fuse-Loss Detection 60 FL A VT fuse-loss condition is detected by using the positive and negative sequence components of the voltages and currents. VT fuse-loss output can be initiated from internally generated logic or from input contacts. 81 Time Delay 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or 1% Frequency Pickup #1,#2,#3,#4.00 to Hz 0.01 Hz 0.02 Hz to Hz* Time Delay #1,#2,#3,#4 2 to 65,0 Cycles 1 Cycle 2 to +3 Cycles or 1% The pickup accuracy applies to 60 Hz models at a range of 57 to 63 Hz, and to Hz models at a range of 47 to 53 Hz. Beyond these ranges, the accuracy is 0.1 Hz. Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondary rating. 5

6 * This range applies to Hz nominal frequency models. PROTECTIVE FUNCTIONS (cont.) Device Setpoint Number Function Ranges Increment Accuracy 87 Phase Differential Current Minimum Pickup 0.20 A to 3.00 A 0.01 A 0.10 A or 5% (0.04 to 0.60 A) ( 0.02 A or 5%) Percent Slope 1 to 100% 1% 2% Time Delay 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or 1% When a time delay of 1 cycle is selected, the response time is less than 1 1 / 2 cycles. 87 GD Ground (zero sequence) Differential Pickup 0.2 to 10 A 0.01 ±0.1 or ±5% (0.04 to 2.00 A) Time Delay 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or ±1% CT Ratio Correction (R C ) 0.10 to The 87GD function is provided primarily for low-impedance grounded generator applications. This function operates as a directional differential. If 3I 0 or I n is extremely small, the directional element is disabled. External Functions EXT Two functions are provided for externally connected devices to trip through the M 3420 to provide additional logic and target information. Any one or more of the input contacts (INPUT1 through INPUT6) can be programmed to activate designated output contacts after a selected time delay. Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 1 to +3 Cycles or 1% Nominal Settings Nominal Voltage 60 to 140 V 1 V Nominal Current 0. to 6.00 A 0.01 A VT Configuration Line-Line / Line-Ground/Line-Ground to Line-Line* Seal-In Delay 2 to 8160 Cycles 1 cycle 1 to +3 Cycles or ±1% * When Line-Ground to Line-Line is selected, the relay internally calculates the line-line voltage from the lineground voltages for all voltage-sensitive functions. This Line-Ground to Line-Line selection should only be used for a VT nominal secondary voltage of 69 V (not 120 V). Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondary rating. 6

7 Metering The M 3420 provides metering of voltages (phase, neutral and sequence quantities), currents (phase, neutral and sequence quantities), real power, reactive power, power factor and impedance measurements. Metering accuracies are: Voltage: Current: Power : Frequency: 0.5 V or 0.5%, whichever is greater 0.8 V or 0.75%, whichever is greater (when both RMS and line ground to line line are selected) 5 A rating, 0.1 A or 3%, whichever is greater 1 A rating, 0.02 A or 3%, whichever is greater 0.01 PU or ±2%, whichever is greater (real and reactive) 0.02 Hz (from 57 to 63 Hz for 60 Hz models; from 47 to 53 Hz for Hz models) Oscillograph Recorder The oscillograph recorder provides comprehensive data recording of all monitored waveforms, storing up to 170 cycles of data. The total record length may be configured by the user for 1, 2, 3 or 4 partitions. The sampling rate is 16 times the power system nominal frequency ( or 60 Hz). When armed, the recorder is triggered either via the designated status inputs, trip outputs, or via serial communications. When armed yet untriggered, the recorder continuously stores waveform data, keeping the most recent data in memory. When triggered, the recorder continues to store data in memory for a user-defined, post-trigger delay period. Target Storage A total of 32 targets can be stored. The information will include the function(s) operated, the functions picked up, input/output contact status, timer status, time stamp, and phase and neutral currents at the time of trip. Calculations Current and Voltage RMS Values: Uses discrete Fourier transform (DFT) algorithm on sampled (16 times per cycle) voltage and current signals to extract fundamental frequency phasors for M 3420 calculations. RMS phase voltages for the 59 and 27 functions (when total RMS is selected), and the 24 function are obtained using the time domain approach to obtain accuracy over a wide frequency band. When the RMS option is selected, the magnitude calculation is accurate over a wide frequency range (10 to 80 Hz). When the DFT option is selected, the magnitude calculation is accurate near nominal frequency ( or 60 Hz). Power Input Options Nominal 110/120/230/240 V ac, /60 Hz, or nominal 110/125/220/2 V dc. UL/CSA rating 85 V ac to 265 V ac and from 80 V dc to 288 V dc. Burden 20 VA at 120 V ac/125 V dc. Withstands 300 V ac or 300 V dc for 1 second. Nominal 24/48 V dc, operating range from 18 V dc to 56 V dc. Burden 20 VA at 24 V dc and 20 VA at 48 V dc. Withstands 65 V dc for 1 second. An optional redundant power supply is available. Sensing Inputs Four Voltage Inputs: Rated nominal voltage of 60 V ac to 140 V ac, 60 Hz/( Hz optional). Will withstand 240 V continuous voltage and 360 V for 10 seconds. Source voltages may be line-to-ground or line-to-line connected. Phase sequence ABC/ACB is selectable. Voltage transformer burden less than 0.2 VA at 120 V. Seven Current Inputs: Rated nominal current (I R ) of 5.0 A or 1.0 A (optional), 60 Hz/( Hz optional). Will withstand 2I R continuous current and 100I R for 1 second. Current transformer burden is less than 0.5 VA at 5 A (5 A option), or 0.3 VA at 1 A (1 A option). 7

8 Status Input Contacts The status inputs, INPUT1 through INPUT6, can be programmed to block any of the M 3420 functions, to trigger the oscillograph recorder, or to operate one or more outputs. The status inputs should be dry contacts and are internally connected (wetted) to a 24 V dc power supply. To provide breaker status LED indication on the front panel, the INPUT1 status input contact must be connected to the 52b breaker status contact. The minimum current value to initiate/pickup an Input is >25 ma. Output Contacts The eight programmable output contacts (six form a and two form c ), the power supply alarm output contact (form b ), and the self-test alarm output contact (form c ) are all rated as per IEEE C37.90 (See Tests and Standards section for details). Any of the M 3420 functions can be individually programmed to activate any one or more of the eight programmable output contacts. Target/Status Indicators and Controls The RELAY OK LED reveals proper cycling of the microcomputer. The BRKR CLOSED LED will turn on when the breaker is closed (when the 52b contact input is open). The OSC TRIG LED indicates that oscillographic data has been recorded in the unit's memory. The TARGET LED will turn on when any of the relay functions operate. Pressing and releasing the TARGET RESET button resets the target LED if the conditions causing the operation have been removed. Pressing and holding the TARGET RESET button displays the present pickup status of the M 3420 functions. The PS1 and PS2 LEDs will remain on as long as power is applied to the unit and the power supply is operating properly. Communication Communications ports include rear panel RS 232 and RS-485 ports, a front panel RS-232 port, and an IRIG B port. The communications protocol implements serial, byte-oriented, asynchronous communication, providing the following functions when used with the Microsoft Windows-compatible M 3800A or S-3400 (Windows 7 or later) IPScom Communications Software package. MODBUS and BECO 2200 protocols are supported, providing: Interrogation and modification of setpoints Time-stamped trip target information for the 32 most recent events Real-time metering of all quantities measured. Downloading of recorded oscillographic data (Not available with MODBUS) IRIG-B The M 3420 can accept a modulated IRIG B time clock synchronization signal through a BNC connector provided at the rear of the unit. The IRIG B time synchronization information is used to correct the hour, minute, seconds and milliseconds information. HMI Module (optional) Local access to the is provided through an optional M-3931 HMI (Human-Machine Interface) Module, allowing for easy-to-use, menu-driven access to all functions via six buttons and a 2-line by 24 character alphanumeric LCD. Features of the HMI Module include the following: User-definable access codes allow three levels of security Interrogation and modification of setpoints Time-stamped trip target information for the 32 most recent events Real-time metering of all quantities measured 8

9 Target Module (optional) An optional M-3920 Target Module provides 24 target and 8 output LEDs. Appropriate target LEDs will light when the corresponding M 3420 function operates. The targets can be reset with the TARGET RESET button. The OUTPUT LEDs indicate the status of the programmable output contacts. Type Tests and Standards The M 3420 Generator Protection relay complies with the following type tests and standards: Voltage Withstand Dielectric Withstand IEC ,0 V dc for 1 minute applied to each independent circuit to earth 3,0 V dc for 1 minute applied between each independent circuit 1,0 V dc for 1 minute applied to IRIG-B circuit to earth 1,0 V dc for 1 minute applied between IRIG-B to each independent circuit Impulse Voltage IEC ,000 V pk, +/- polarity applied to each independent circuit to earth 5,000 V pk, +/- polarity applied between each independent circuit 1.2 by µs, 0 ohms impedance, three surges at 5 second intervals Insulation Resistance IEC > 40 Megaohms Electrical Environment Electrostatic Discharge Test IEC Class 4 (8 kv) point contact discharge Fast Transient Disturbance Test IEC Class 4 (4 kv, 2.5 khz) Surge Withstand Capability ANSI/IEEE C Radiated Susceptibility ANSI/IEEE C ,0 V pk-pk oscillatory applied to each independent circuit to earth 2,0 V pk-pk applied between each independent circuit 5,000 V pk Fast Transient applied to each independent circuit to earth 5,000 V pk Fast Transient applied between each independent circuit V/m Output Contacts Ratings IEEE C37.90 UL 8 CSA C22.2 No A make for 0.2 seconds at 2 Vdc resistive 8 A carry at 120 Vac, /60 Hz 6 A break at 120 Vac, /60 Hz 0.1 A break at 125 Vdc 0.1 A break at 120 Vac 9

10 Atmospheric Environment Temperature IEC IEC IEC Cold, 20 C for 96 hours Dry Heat, +70 C for 96 hours Damp Heat, % RH, for 96 hours Mechanical Environment Vibration IEC Vibration response Class 1, 0.5 g Vibration endurance Class 1, 1.0 g Compliance UL-Listed per 8 Industrial Control Equipment CSA-Certified per C22.2 No Industrial Control Equipment External Connections M 3420 Generator Protection Relay External Connections are illustrated in Figures 1, 2, and 3 on the following pages. Physical Size: 19.00" wide x 5.21" high x 10.00" deep (48.3 cm x 13.2 cm x 25.4 cm) Mounting: The unit is a standard 19", semiflush, three-unit high, rack-mount panel design, conforming to ANSI/EIA RS-310C and DIN Part 5 specifications. Vertical or horizontal panel-mount options are available. Contact Beckwith Electric for optional GE L 2/Westinghouse FT 41 retrofit panel vertical mounting details. Environmental: For flat surface mounting on a Type 1 enclosure, rated to 70 C surrounding air ambient. Approximate Weight: 13 lbs (7.7 kg) Approximate Shipping Weight: 15 lbs (11.3 kg) Recommended Storage Parameters Temperature: 5 C to 40 C Humidity: Maximum relative humidity 80% for temperatures up to 31 C, decreasing to 31 C linearly to % relative humidity at 40 C. Environment: Storage area to be free of dust, corrosive gases, flammable materials, dew, percolating water, rain and solar radiation. See Instruction Book, Appendix E, Layup and Storage for additional information. Patent & Warranty The M 3420 Generator Protection Relay is covered by U.S. Patents 5,592,393 and 5,224,011. The M 3420 Generator Protection Relay is covered by a five year warranty from date of shipment. Specification subject to change without notice. 10

11 U C L US LISTED IND.CONT.EQ. 83F4 R NRTL /C LR B E C K W IT H E L E C T R I C C O. I N C t h AV E NO. L A RG O, FL WA RNING! CONTA CT W ITH T ERMINALS MAY CA USE ELECT RIC SHOCK Danger! Contact avec les terminaux peut causer un choc electrique FO R CO NT ACT RAT INGS SEE INSTRUCT ION MANUAL MODEL: FIRMWARE: Hz 60 Hz SERIAL NO IRIG- B COM 2 RS RX TX RS48 5 COM 3 I N I N I N I N I N I N P U T S I N ( 5 2 b ) I N R T N P / S S E L F - T E S T A L A R M S O U T P U T S V V A B V A B V B C V V C V C A N I I I A B C I N I a I b I c P S 2 P S F 1 P S 2 P S 1 F RAT ED VO LT AGE RATED CURRENT 1A,NOM 5 A,NOM , / 6 0Hz AMP,25 0V (3 AB) U.S. PATENT 5,592,393, 5,224,011 F 3 F 4 Figure 1 External Connections NOTES: 1. Output contacts #1 through #4 are high speed operation contacts. 2. To comply with UL and CSA listing requirements, terminal block connections must be made with #22 12 AWG solid or stranded copper wire inserted in an AMP # (or equivalent) connector. Wire insulation must be rated at 75 C minimum. Terminal block connections 1 through 34 must be tightened to 12 in lbs torque. Terminal block connections 35 through 63 must be tightened to 8.0 in lbs, minimum, 9.0 in-lbs, maximum torque. Over torquing may result in terminal damage. 3. ONLY dry contacts must be connected to inputs (terminals 5 through 10 with 11 common) because these contact inputs are internally wetted. Application of external voltage on these inputs may result in damage to the units. 4. All relays are shown in the de-energized state. 5. The power supply relay (P/S) is energized when the power supply is functioning properly. 6. The self-test relay is energized when the relay has performed all self-tests successfully. 7. FIELD GND connection is intended for future use.!! 11

12 Utility System Typical Connection Diagram This function provides control for the function to which it points. NOTE: Some functions are mutually exclusive; see Instruction Book for details. 52 Unit BFPh CT Gen VT FL 32 51V CT 87 GD BFN N 51N CT R Low Impedance Grounding with Overcurrent Stator Ground Fault Protection VT 59N R High Impedance Grounding Figure 2 One-Line Connection Diagram 12

13 UTILITY SYSTEM A B C Other Relays a b c Other Relays ALTERNATE CONNECTIONS a b c Other Relays I C I B I A Gen A B C 52b Three VT Wye-Wye Connection 1 1 Two VT Open-Delta Connection Generator Other Relays A B C Low Impedance Grounding ➁ ➂ ➃ ➄ ➅ Alternate VT connections Required generator breaker status input (52b). Contact is closed when generator breaker is open. Use unit breaker contact if no generator breaker present. Output contact pairs designated by user. Alarm output can be grouped to a single alarm at discretion of user. Available control output to supervise other relays for VT Fuse Loss can be designated. Input contact number is designated by user. 8 WARNING: ONLY dry contacts must be connected because these contact inputs are internally wetted. Application of external voltage on these inputs may result in damage to the units. High Impedance Grounding nnote: current terminal polarity marks ( ) indicate "entering" current direction when primary current is "from" the generator. If CT connections differ from those shown, adjust input terminals. Example of Control / Output Connections + DC: 24 V 48 V OR DC: 110 V 125 V 220 V 2 V AC: 110 V 120 V 230 V 240 V + POWER SUPPLY b BREAKER FAILURE INITIATE 6 60FL OSCILLOGRAPH RECORDER INITIATE TRIP ALARM SELF-TEST FAILURE ALARM POWER OK STATUS ALARM 5 VT FUSE LOSS TRIP 3 52G 52Ga - 4 EXTERNAL INPUTS ALARM OUTPUTS CONTROL OUTPUTS TRIP OUTPUT Figure 3 Three-Line Connection Diagram 13

14 17.68 [44.91] 17. [44.45] ACTUAL 5.21 [13.23] ACTUAL 5.28 [13.41] RECOMMENDED CUTOUT WHEN RELAY IS NOT USED AS STANDARD RACK MOUNT 17. [44.45] [25.91] [48.26] [46.51] 0.35 [0.89] 0.40 [1.02] X 0.27 [0.68] Slot (4X) 2.25 [5.72] 1.48 [3.76] Standard 19" Horizontal Mount Chassis NOTE: Dimensions in brackets are in centimeters. Figure 4 Mounting Dimensions 14

15 OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 M 3420 Generator Protection Relay 5.65 [14.40] 0.35 [0.89] 6.19 [15.7] 2.25 [5.72] 1.97 [5.0] 0.28 [0.71] Dia. (4X) 5.59 [14.20] Actual 2.25 [5.72] 1.67 [4.24] 0.03 [0.076] TARGETS [48.26] OUTPUTS [46.51] 17.5 [44.45] ACTUAL [44.91] EXIT ENTER TARGET RESET PS 2 PS 1 TARGET DIAG BRKR CLOSED OSC. TRIG RELAY OK TIME SYNC COM [44.45] Recommended cutout when relay is not used as standard rack mount and is panel cut out mounted [25.91] [48.26] NOTE: Dimensions in brackets are in centimeters. Figure 5 Vertical Mounting Dimensions NOTE: Panels for vertical mounting are available. When mounted vertically, the target module will be located at the top and all front-panel text will be horizontally aligned. Consult Beckwith Electric Co. for details. 15

16 BECKWITH ELECTRIC CO., INC th Avenue North Largo, Florida U.S.A. PHONE (727) FAX (727) ISO 9001: Beckwith Electric Co. Printed in U.S.A. ( ) SP-16MC