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Basler BE1-50/51B-225 Instruction Manual

Overcurrent relays
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INSTRUCTION MANUAL
FOR
OVERCURRENT RELAYS
BE1-50/51B-214 AND BE1-50/51B-225
Publication: 9 2520 00 994
Revision: G 03/2001

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Summary of Contents for Basler BE1-50/51B-225

  • Page 1 INSTRUCTION MANUAL OVERCURRENT RELAYS BE1-50/51B-214 AND BE1-50/51B-225 Publication: 9 2520 00 994 Revision: G 03/2001...
  • Page 2 INTRODUCTION This manual provides information concerning the operation and installation of the BE1-50/51B-214 and BE1- 50/51B-225 Overcurrent Relays. To accomplish this, the following is provided. Specifications Functional description Mounting information Setting procedure/example W A R N I N G ! To avoid personal injury or equipment damage, only qualified personnel should perform the procedures presented in this manual.
  • Page 3 The availability and design of all features and options are subject to modification without notice. Should further information be required, contact Basler Electric Company, Highland, Illinois. BASLER ELECTRIC ROUTE 143, BOX 269 HIGHLAND, IL 62249 USA http://www.basler.com, info@basler.com...

  • Page 4: Table Of Contents

    Test Procedure, Models BE1-50/51B-214 (Five Ampere Sensing Input) ..5-3 Test Procedure, Models BE1-50/51B-225 (One Ampere Sensing Input) ..5-5 Setting the Relay ............5-8 Periodic Tests .
  • Page 5 CONTENTS - Continued SECTION 6 MAINTENANCE ......6-1 General ............. 6-1 In-House Repair .

  • Page 6: Section 1 • General Information

    SECTION 1 • GENERAL INFORMATION DESCRIPTION BE1-50/51B-214 and BE1-50/51B-225 Overcurrent Relays are direct replacements for General Electric, IAC relays. Specific IAC relays by model number are shown in Table 1-1. To replace an existing IAC relay, perform the following steps.

  • Page 7: Features

    Increments Model Number Sensing Input BE1-50/51B-214 5 amperes 0.5 - 15.9 1.0 - 99.0 BE1-50/51B-225 1 ampere 0.1 - 3.18 0.02 0.2 - 19.8 Advantages BE1-50/51B-214 Overcurrent Relays have many advantages over other overcurrent relays. The five primary advantages are: •...
  • Page 8 TIME PICKUP Range Setting the TIME PICKUP to the minimum pickup (0.5 ampere), places the relay in the most sensitive state and may be used as a safety setting. 1 Ampere Unit 0.1 to 3.18 amperes in 0.02 ampere steps. 5 Ampere Unit 0.5 to 15.9 amperes in 0.1 ampere steps.
  • Page 9 INST Transient Response Less than 10% overreach with system time constants up to 40 milliseconds Burden Burden is non-linear. (Figure 1-1 illustrates the device burden.) 1 Ampere Unit At 0.1 amperes, Z = 120 ohms. At 1.0 ampere, Z = 5 ohms. 5 Ampere Unit At 0.5 amperes, Z = 4.8 ohms.
  • Page 10 Harmonic Response Harmonic rejection is illustrated in Figure 1-2. Figure 1-2 shows that a relay set for one ampere pickup would pickup at 0.96 ampere on a current containing 40% seventh harmonic. This corresponds to a ten-to-one rejection ratio. Other conditions may be evaluated in the same manner.
  • Page 11 Figure 1-3. Instantaneous Characteristic Curves Time Characteristics Nine inverse time functions and one fixed time function can be selected by a front panel switch. Characteristic curves for the inverse and definite time functions are defined by the following equation. Where: = Time to trip in seconds D = TIME DIAL setting M = Multiple of PICKUP setting...
  • Page 12 Time Characteristics - The fixed time characteristic provides delays of 0.0 to 9.9 seconds Continued corresponding to the time dial setting. The time set is constant over a range of pickup multiples from 1.0 to 40. Accuracy is ±1 cycle ±2% of time to trip for time dial settings of 0.1 and greater.
  • Page 13 Integrating Time Reset Reset begins when the current drops below 95% of pickup. Integrating reset Characteristic simulates the disk reset of electromechanical relays. BE1-50/51B-214/- 225 relays provide the integrating reset function even when input current falls to zero. Integrating reset characteristics are defined by the following equation and shown in Figure 1-4.
  • Page 14 Meets IEC 255-5 and exceeds IEEE C37.90-1989, one-minute dielectric Isolation (high potential) tests as follows: All circuits to ground: 2828 Vdc Input to Output Circuits: 2000 Vac or 2828 Vdc 100.0 10.0 Multiple of Pickup This chart vertical axis xRD (Seconds) is applicable for all curves and is derived from multiplying the constant R for the curve selected times D (the TIME DIAL...

  • Page 15: Characteristic Curves

    To order full-size drawings of these characteristic curves, contact Customer Service Department of the Power Systems Group, Basler Electric, and request publication 9 2520 00 999. This publication contains fourteen full size characteristic curves on transparent paper (vellum).
  • Page 16 MULTIPLES OF PICK-UP Figure 1-5. Time Characteristic Curve 99-1369, S-Short Inverse (SW3-3 OFF, Similar to ABB CO-2) BE1-50/51B-214/-225 - General Information 1-11...
  • Page 17 MULTIPLES OF PICK-UP Figure 1-6. Time Characteristic Curve, 99-1370, L-Long Inverse (SW3-3 OFF, Similar to ABB CO-5) 1-12 BE1-50/51B-214/-225 - General Information...
  • Page 18 MULTIPLES OF PICK-UP Figure 1-7. Time Characteristic Curve, 99-1371, D-Definite Time (Similar to ABB CO-6) BE1-50/51B-214/-225 - General Information 1-13...
  • Page 19 MULTIPLES OF PICK-UP Figure 1-8. Time Characteristic Curve, 99-1372, M-Moderately Inverse (Similar to ABB CO-7) 1-14 BE1-50/51B-214/-225 - General Information...
  • Page 20 MULTIPLES OF PICK-UP Figure 1-9. Time Characteristic Curve, 99-1373, I-Inverse (SW3-3 OFF, Similar to ABB CO-8) BE1-50/51B-214/-225 - General Information 1-15...
  • Page 21 MULTIPLES OF PICK-UP Figure 1-10. Time Characteristic Curve, 99-1374, V-Very Inverse (SW3-3 OFF, Similar to ABB CO-9) 1-16 BE1-50/51B-214/-225 - General Information...
  • Page 22 MULTIPLES OF PICK-UP Figure 1-11. Time Characteristic Curve, 99-1375, E-Extremely Inverse (SW3-3 OFF, Similar to ABB CO-11) BE1-50/51B-214/-225 - General Information 1-17...
  • Page 23 MULTIPLES OF PICK-UP Figure 1-12. Time Characteristic Curve, 99-1376, BS142-B (BS142 Very Inverse) 1-18 BE1-50/51B-214/-225 - General Information...
  • Page 24 MULTIPLES OF PICK-UP Figure 1-13. Time Characteristic Curve, 99-1377, BS142-C (BS142 Extremely Inverse) BE1-50/51B-214/-225 - General Information 1-19...
  • Page 25 Figure 1-14. Time Characteristic Curve, 99-1595, S2-Short Inverse (SW3-3 ON, Similar to GE IAC 55) 1-20 BE1-50/51B-214/-225 - General Information...
  • Page 26 Figure 1-15. Time Characteristic Curve, 99-1594, L2-Long Inverse (SW3-3 ON, Similar To GE IAC 66) BE1-50/51B-214/-225 - General Information 1-21...
  • Page 27 Figure 1-16. Time Characteristic Curve, 99-1597, I2-Inverse (SW3-3 ON, Similar To GE IAC 51) 1-22 BE1-50/51B-214/-225 - General Information...
  • Page 28 Figure 1-17. Time Characteristic Curve, 99-1596, V2-Very Inverse (SW3-3 ON, Similar To GE IAC 53) BE1-50/51B-214/-225 - General Information 1-23...
  • Page 29 Figure 1-18. Time Characteristic Curve, 99-1598, E2-Extremely Inverse (SW3-3 ON, Similar To GE IAC 77) 1-24 BE1-50/51B-214/-225 - General Information...

  • Page 30: Human Machine Interface

    SECTION 2 • HUMAN MACHINE INTERFACE (Controls and Indicators) DESCRIPTION Table 2-1 lists and briefly describes the operator controls and indicators of the BE1-50/51B-214 and BE1- 50/51B-225 Overcurrent Relays. Reference the call-out letters to Figures 2-1, 2-2, and 2-3. Table 2-1. BE1-50/51B-214/-225 Controls and Indicators (Refer to Figures 2-1, 2-2, and 2-3) Locator Control or Indicator Function...
  • Page 31 Table 2-1. BE1-50/51B-214 Controls and Indicators - Continued Locator Control or Indicator Function Targets Black target indicators trip to red and magnetically latch when the trip circuit current is greater than 0.2 amperes. One target each for TIME and INST. TIME PICKUP Selectors Two switches (UNITS and TENTHS in five ampere units and COARSE and FINE in one ampere units) to select...
  • Page 32 Figure 2-2. Location of Controls and Indicators BE1-50/51B-214/-225 - Human Machine Interface (Controls and Indicators)
  • Page 33 Figure 2-3. Location of Controls and Indicators BE1-50/51B- 214/-225 - Human Machine Interface (Controls and Indicators)

  • Page 34: Section 3 • Functional Description

    SECTION 3 • FUNCTIONAL DESCRIPTION GENERAL BE1-50/51B-214/-225 Overcurrent Relays are microprocessor based non-directional relays that measure ac current to provide secure and reliable instantaneous and time overcurrent protection for power systems. FUNCTIONAL DESCRIPTION Sensing Input Single phase ac current from system current transformers (CT) is brought into the BE1-50/51B-214/-225 Overcurrent Relay at terminals five and six.

  • Page 35: Outputs

    Outputs Instantaneous And Timed System circuit breakers controlled by the output contacts can be manually tripped by applying a short across the TIME or INST MANUAL TRIP front panel test points. Current flow in the trip circuit is indicated by the operation of the target.

  • Page 36: Section 4 • Installation

    Reinstall the existing connection plug. • to install the cover, position the interlocking bracket at the top of the new Basler Electric cover into the mating receptacle at the top of the cover adapter plate. Secure the captive fastener at the bottom of the cover.

  • Page 37: Application Coordination

    APPLICATION COORDINATION In a typical application coordination scheme, a BE1-50/51B-214 or BE1-50/51B-225 is being used to provide primary protection for a radial distribution feeder. An electromechanical overcurrent relay with extremely inverse timing provides protection for the transformer and bus. To improve coordination with the electromechanical relay, the BE1 relay with integrating reset characteristic has the time characteristic curve E (extremely inverse) selected (SW3-3 set to OFF) and the TIME DIAL set to 2.0.

  • Page 38: Connections

    Equation for time to trip during rewind (before relay is reset). (Full Trip)(Rewind Time) Trip This Occurance Full Rewind Second Operation (0.209)(3) 15.5 0.040 seconds Third Operation (0.209)(11.96) 15.5 0.161 seconds CONNECTIONS Typical ac input and dc control connections are shown in Figures 4-2 and 4-3. Refer to Section 3, block diagram for relay internal connections.

  • Page 39: Dc Control Connections

    Figure 4-3. DC Control Connections BE1-50/51B-214/-225 - Installation...

  • Page 40: Section 5 • Testing

    If there is evidence of damage, immediately file a claim with the carrier and notify the Regional Sales Office, or contact the Sales Representative at Basler Electric, Highland, Illinois. Proper operation of the relay may be confirmed by performing the operational test procedures in this Section.

  • Page 41: Pickup And Timing Test Setup

    TEST SET CURRENT AMPS SOURCE BE1-50/51B-214 START INST TIME STOP TIMER INPUT D1148-25.vsd 12-09-99 Figure 5-1. Pickup And Timing Test Setup T E S T S E T C U R R E N T A M P S S O U R C E BE1-50/51B-214 S T A R T INST...

  • Page 42: Test Procedure, Models Be1-50/51B-214 (Five Ampere Sensing Input)

    NOTE When testing TIME overcurrent functions, INST PICKUP settings of 00 will affect the calibration of the TIME functions. TIME PICKUP settings of 00 also affect INST functions. Test Procedure, Models BE1-50/51B-214 (Five Ampere Sensing Input) Time Pickup Test Perform preliminary setup: •...
  • Page 43 Time Dial Test Perform preliminary setup: • Connect test setup as shown in Figure 5-1. • Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to ON, and SW3-4 ON. • Set TIME DIAL to 4.5. •...

  • Page 44: Test Procedure, Models Be1-50/51B-225 (One Ampere Sensing Input)

    29 ±0.25 seconds, then reapply the 4.0 amperes input current. Record the elapsed time from the reapplication of input current to the output retrip. Result: Elapsed time should be 2.08 ±0.4 seconds. Test Procedure, Models BE1-50/51B-225 (One Ampere Sensing Input) Time Pickup Test Perform preliminary setup: •...
  • Page 45 Step 3. Set TIME PICKUP to 0.44. Step 4. Slowly increase current to terminals 5 and 6. PICKUP LED should change from GREEN to RED at an input current of 0.426 to 0.454 amperes. Step 5. Decrease input current until PICKUP LED turns OFF. INST Pickup Test Perform preliminary setup: •...
  • Page 46 and SW3-4 ON. • Set TIME DIAL to 4.5. • Set CURVE to S • Set TIME PICKUP to 0.2. • Set INST PICKUP to 0.2. Step 1. Set target current source to 1.0 ampere, ac. Step 2. Apply 1 ampere input current to terminals 5 and 6. Check that both TIME and INST targets operate. Step 3.

  • Page 47: Setting The Relay

    Step 3. Apply 0.8 amperes input current to terminals 5 and 6. After the unit trips, remove the input current for 20 ±0.25 seconds, then reapply the 0.8 amperes input current. Record the elapsed time from the reapplication of input current to the output retrip. Result: Elapsed time should be 1.55 ±0.3 seconds.

  • Page 48: Section 6 Maintenance

    A recommended periodic test is provided in this section. If the relay fails to function properly and in-house repair is considered, contact the Customer Service Department of the Power Systems Group, Basler Electric, for a return authorization number prior to shipping. IN-HOUSE REPAIR In-house replacement of individual components should be performed by qualified technicians.
  • Page 49 Step 3. Verify that the time to trip for the curve and time dial settings at a multiple of six is the same as the time given on the characteristic curve. Refer to Section 1 for the characteristics curves. Step 4. Verify that the time to trip for the instantaneous element at a pickup multiple of 2 is not greater than the time given on the instantaneous characteristic curve.

  • Page 50: Section 7 Manual Change Information

    SECTION 7 • MANUAL CHANGE INFORMATION SUMMARY AND CROSS REFERENCE GUIDE This section contains information concerning the previous editions of the manual. The substantive changes to date are summarized in Table 7-1. Table 7-1. Changes Revision Summary of Changes ECA/ECO/Date Changed all references to SW8-4 being field selectable.
  • Page 51 ROUTE 143, BOX 269 HIGHLAND, IL 62249 USA http://www.basler.com, info@basler.com PHONE 618-654-2341 FAX 618-654-2351...

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