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BECKWITH ELECTRIC M-0245C Instruction Book

High speed sync-check relay
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Instruction Book
M-0245C High Speed
Sync-Check Relay

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Summary of Contents for BECKWITH ELECTRIC M-0245C

  • Page 1 Instruction Book M-0245C High Speed Sync-Check Relay...
  • Page 2 SYNCHRONIZING High Speed Sync-Check Relay M-0245C Motor Bus Transfer Relay for Power Plant and Industrial Site Motor Bus Transfer • Verifies that the line voltage is within preset limits. • Verifies within one cycle if the phase angle is within preset limits.
  • Page 3 Delay after power turn on: Approximately 2 sec. Output will be open during this period, regardless of other inputs. Delay after closing enable input: 1/4 cycle. Output will be open until the M-0245C is enabled, regardless of other inputs. –2–...
  • Page 4 M-0245C High Speed Sync-Check Relay Specification Delay after voltage change in or out of band: Generally ranges from 0 to 0.08 sec. Refer to the M-0245C Application Guide for further details. Maximum delay after phase change in or out of band: 1 cycle Status Relay Contacts Line Source Voltage OK: Contact is closed when the voltage is within the upper and lower voltage limit settings.
  • Page 5 The M-0245C High Speed Sync-Check Relay is covered by U.S. Patents 4,218,625 and 4,256,972. Warranty The M-0245C High Speed Sync-Check Relay is covered by a two year warranty from date of shipment. The Specification is subject to change without notice.
  • Page 6 WARNING DANGEROUS VOLTAGES, capable of causing death or serious injury, are present on the external terminals and inside the equip- ment. Use extreme caution and follow all safety rules when han- dling, testing or adjusting the equipment. However, these internal voltage levels are no greater than the voltages applied to the exter- nal terminals.
  • Page 7 PRODUCT CAUTIONS Before attempting any test, calibration, or maintenance procedure, personnel must be completely familiar with the particular circuitry of this unit, and have an adequate understanding of field effect devices. If a component is found to be defective, always follow replacement procedures carefully to that assure safety features are maintained.

  • Page 8: Table Of Contents

    Table of Contents M-0245C High Speed Sync-Check Relay Instruction Book Introduction ........................1 Theory of Operation ...................... 1 Motor Bus Undervoltage Monitor .................. 1 Input Loss Protection ....................1 Maintenance ......................... 2 Figure 1 Block Diagram ..................... 3 Test Procedure ......................4 Equipment Required .....................
  • Page 9 Figure 9 Variable Speed Motor Application Option Schematic, Y-0264 ....18 Parts List ........................19 Phase Angle Limit Control Option ................25 Parts Mounted to the Enclosure ................. 25 B-0264 Variable Speed Motor Application Option ............26 © Beckwith Electric Co. Printed in U.S.A. (04.24.01) 800-0245C-IB-00 04/01 – ii –...

  • Page 10: Introduction

    The scaled down voltages are converted into dc Input Loss Protection voltages by the Ac to Dc Converters. These converters The M-0245C has been designed with an Input Loss are active full-wave rectifiers and filters that eliminate Detector circuit to minimize the possibility of the output...

  • Page 11: Maintenance

    To help in analyzing the problem, a complete description of the malfunction and conditions leading circuitry in the M-0245C, field repair is not to the failure should be included with the unit. recommended. All units are fully calibrated at the factory prior to shipment;...

  • Page 12: Figure 1 Block Diagram

    Figure 1 Block Diagram –3–...

  • Page 13: Test Procedure

    125 V rms. Procedure Slowly reduce the Line voltage input; the UPPER VOLTAGE LIMIT-LINE LED The M-0245C printed circuit board has been should light as the voltage level drops coated with a moisture-resistant, conformal below 125 V rms. coating. If a component needs to be...

  • Page 14: Phase Angle Limit

    I NOTE: To prevent the voltage level detection Repeat steps 4 through 8 with the PHASE circuit outputs from oscillating, there is ANGLE LIMIT dial set at 10° and 50°. approximately 0.5 V rms hysteresis Return both inputs to 120 V rms, 60 between when the LEDs turn on and turn [50] Hz.

  • Page 15: Figure 2 External Connections

    M-0245C Instruction Book FUNCTION Motor Bus Potential Input Hot Motor Bus Potential Input Neutral Line Potential Input Neutral Line Potential Input Hot Phase Angle Analog Output Not used 0 Volts, Common for Analog Outputs. Should be Grounded. Not Used Motor Bus Voltage Analog...

  • Page 16: Phase Angle Status Output

    Return the UPPER VOLTAGE LIMIT dial With the phase angle between the inputs to 125 V rms. at 20° and the PHASE ANGLE LIMIT dial set at midscale, the incandescent bulb The UPPER VOLTAGE LIMIT-LINE LED and all front panel LEDs should light. should be on, and the Voltage Status Contact from TB1-22 to TB1-23 should be Slowly increase the phase angle above...

  • Page 17: Phase Angle Ok To Output Contact Response Time

    M-0245C Instruction Book Phase Angle OK to Output Contact Response Loss of Voltage Input Time Detection Circuits Set the PHASE ANGLE LIMIT dial to 20°. Apply 120 V rms, 60 [50] Hz to the Line Line Voltage Loss voltage input.

  • Page 18: Figure 3 Test Setup

    CONNECTIONS FOR BREAKER CLOSE CIRCUIT TEST 25 W INCANDESCENT M-0245 BULB TB2-A DC SOURCE TB2-B TB2-C TB2-D CONNECTIONS FOR PHASE ANGLE STATUS CONTACT TEST 25 W INCANDESCENT BULB TB1-24 DC SOURCE TB1-25 TB1-26 Figure 3 Test Setup –9–...

  • Page 19: Figure 4 Line Voltage Loss

    M-0245C Instruction Book 20 MS CHANNEL 1 CHANNEL 2 Figure 4 Line Voltage Loss 50 MS CHANNEL 1 CHANNEL 2 Figure 5 Motor Bus Voltage Loss –10–...

  • Page 20: Typical Voltages

    Typical Voltages Conditions Motor Bus, Line and Power Supply are 120 V, 60 [50] Hz. Measurements are made with a true rms type digital multimeter as described in the TEST PROCEDURE section. Readings are made with the negative lead of the multimeter tied to TB1-7, except where noted. I NOTE: The “bottom”...

  • Page 21: Typical Resistances

    M-0245C Instruction Book Typical Resistances Conditions All rear terminals are open-circuited. Measurements are made with a true rms digital multimeter as described in the Section 4.0, Test Procedure. 0 Ω 4 Ω 4 Ω 7 2 Ω Ω Ω L CAUTION: Any attempt to measure resistances between points on the printed circuit board other than those shown above is likely to cause damage to the unit.

  • Page 22: Calibration

    Place a clip lead between TB1-1 and Calibration TB1-3. Place a second clip lead between TB1-2 I NOTE: The M-0245C has been fully calibrated at and TB1-4 the factory using highly sophisticated, computer-controlled test equipment. There Attach the positive lead of the dc voltmeter is no need to recalibrate the unit before to Test Point 1 (TP1).

  • Page 23: Figure 6 Component Location, B-0207

    M-0245C Instruction Book Figure 6 Component Location, B-0207 –14–...
  • Page 24 Figure 7 Variable Speed Motor Application Component Location, B-0264 –15–...
  • Page 25 M-0245C Instruction Book –16–...
  • Page 26 Figure 8 Schematic, X-0245C –17–...
  • Page 27 M-0245C Instruction Book + C12 LM208H 1/2W 100 pf LM208H 1/2W 100 pf Figure 9 Variable Speed Motor Application Schematic, Y-0264 –18–...

  • Page 28: Parts List

    Parts not marked with an asterisk are normally available from an electronics components house. Those parts or a current substitute will normally be available from Beckwith Electric stock. In either case, when parts are ordered from Beckwith Electric, we will be responsible for supplying the current replacement in the shortest possible time.
  • Page 29 M-0245C Instruction Book COMPONENT BECO DESCRIPTION DESIGNATION NUMBER C13,C57,C65,C72 000-00811 Capacitor, Polyester, 0.1 µF ±10%, 100 V C14–C21 Not Used C23,C90,C100,C102 000-00909 Capacitor, Ceramic Disc, 0.1 µF +80/-20%, 25 V C25,C26,C53,C54 000-00829 Capacitor, Polyester, 0.22 µF ±10%, 100 V C27,C55 000-00813 Capacitor, Polyester, 4.7 µF ±10%, 100 V...
  • Page 30 COMPONENT BECO DESCRIPTION DESIGNATION NUMBER CR74,CR80 Not Used CR83 400-00229 Diode, 1N1190 CR89 See PARTS MOUNTED TO THE ENCLOSURE F1,F2 420-00850 Fuse, 1 A, 125 V, Littelfuse 275–001 Not Used 420-00849 Fuse, 2 A, 125 V, Littelfuse 275–002 K1–K3 Not Used K4,K5 430-00151 Relay, 24 V dc, SPDT, American Zettler...
  • Page 31 M-0245C Instruction Book COMPONENT BECO DESCRIPTION DESIGNATION NUMBER R16,R64,R81 180-00203 Resistor, Carbon Film, 20 K ±5%, 1/4 W R19–R22 340-00015 Resistor, Metal Film, 51.1 K ±0.1%, 1/4 W, RN60E5112B R23,R45,R111 340-00580 Resistor, Metal Film, 66.5 K ±1%, 1/4 W, RN60C...
  • Page 32 COMPONENT BECO DESCRIPTION DESIGNATION NUMBER R132 330-00513 Resistor, Metal Film, 13.3 K ±1%, 1/4 W, RN60E R135 330-00518 Resistor, Metal Film, 15 K ±1%, 1/4 W, RN60E R137,R159,R170 180-00103 Resistor, Carbon Comp, 10 K ±5%, 1/4 W R139 180-00154 Resistor, Carbon Comp, 150 K ±5%, 1/4 W R140 390-00605 Resistor, Metal Film, 110 K ±1%, 1/8 W...
  • Page 33 M-0245C Instruction Book COMPONENT BECO DESCRIPTION DESIGNATION NUMBER RV2,RV7,RV11,RV16 400-00718 Varistor, 1800 V dc, 80 J, Panasonic ERZ–C–14DK182 RV4,RV5,RV9,RV10 400-00709 Varistor, 250 V, 2 J, G.E. V250LA2 RV12,RV17 400-00734 Varistor, 1000 V dc, 40 J, Panasonic ERZ–C–14DK102 RV15 400-00727 Varistor, 250 V, 40 J, G.E. V250LA40B...

  • Page 34: Phase Angle Limit Control Option

    COMPONENT BECO DESCRIPTION DESIGNATION NUMBER PHASE ANGLE LIMIT CONTROL OPTION R162 370-00020 Jumper = 180 190-00439 Resistor, Metal Film, 2.49 K ±1%, 1/8 W = 120 190-00502 Resistor, Metal Film, 10.2 K ±1%, 1/8 W = 60 190-00540 Resistor, Metal Film, 25.5 K ±1%, 1/8 W = 30 PARTS MOUNTED TO THE ENCLOSURE CR89 400-00230...

  • Page 35: B-0264 Variable Speed Motor Application Option

    M-0245C Instruction Book COMPONENT BECO DESCRIPTION DESIGNATION NUMBER B-0264 VARIABLE SPEED MOTOR APPLICATION C1,C2 000-00904 Capacitor, 0.01 µF, ±20%, 1KV, Centralab DD-1032 C3,C4 000-00903 Capacitor, 100 pf, ±20%, 1KV, Centralab DD-101 C5,C6 010-00549 Capacitor, 1.5 µF, 100 V, Polyester Seacor MMKK...
  • Page 36 There shall be no warranties which extend beyond those contained in the Beckwith Electric Co., Inc. terms of sale. All rights reserved by Beckwith Electric Co., Inc. No reproduction may be made without prior written approval of the Company.
  • Page 37 This Page Left Intentionally Blank...
  • Page 38 BECKWITH ELECTRIC CO., INC. 6190 - 118th Avenue North • Largo, Florida 33773-3724 U.S.A. PHONE (727) 544-2326 • FAX (727) 546-0121 E-MAIL marketing@beckwithelectric.com WEB PAGE www.beckwithelectric.com © Beckwith Electric Co. Printed in USA 800-0245C-IB-00 04/01...

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