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Basler BE1-50B-235 Instruction Manual

Overcurrent relays
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INSTRUCTION MANUAL
FOR
OVERCURRENT RELAYS
BE1-50/51B-235 and BE1-50/51B-236
Publication: 9252000898
Revision: —
04/08

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  • Page 1 INSTRUCTION MANUAL OVERCURRENT RELAYS BE1-50/51B-235 and BE1-50/51B-236 Publication: 9252000898 Revision: — 04/08...
  • Page 3 INTRODUCTION This instruction manual provides information about the operation and installation of the BE1-50/51B-235 and BE1-50/51B-236 Overcurrent Relays. To accomplish this, the following information is provided: • General Information and Specifications • Controls and Indicators • Functional Description • Installation and Maintenance •...
  • Page 4 April 2008 CONFIDENTIAL INFORMATION of Basler Electric, Highland Illinois, USA. It is loaned for confidential use, subject to return on request, and with the mutual understanding that it will not be used in any manner detrimental to the interest of Basler Electric.
  • Page 5 REVISION HISTORY The following information provides a historical summary of the changes made to this instruction manual (9252000898). Revisions are listed in reverse chronological order. Manual Revision and Date Change • —, 04/08 Initial release 9252000898 Rev — BE1-50/51B-235/-236 Introduction...
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  • Page 7: Table Of Contents

    CONTENTS SECTION 1 • GENERAL INFORMATION ....................1-1 SECTION 2 • CONTROLS AND INDICATORS ..................2-1 SECTION 3 • FUNCTIONAL DESCRIPTION ................... 3-1 SECTION 4 • INSTALLATION ........................4-1 SECTION 5 • TESTING ..........................5-1 APPENDIX A • CHARACTERISTIC CURVES..................A-1 9252000898 Rev —...
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  • Page 9 SECTION 1 • GENERAL INFORMATION TABLE OF CONTENTS SECTION 1 • GENERAL INFORMATION ....................1-1 INTRODUCTION............................ 1-1 FEATURES ............................1-1 Advantages............................1-2 SPECIFICATIONS ..........................1-2 Time Overcurrent (51) Element......................1-2 Instantaneous Overcurrent A (50-A) Element ..................1-3 Instantaneous Overcurrent B (50-B) Element ..................1-3 Current Sensing Input ........................
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  • Page 11: Table 1-1. Abb Relays Suitable For Direct Replacement

    3. Insert the new relay cradle. 4. Close the knife-blade switches. 5. Install the new Basler Electric cover and secure with the captive thumbnut. BE1-50/51B-235 and BE1-50/51B-236 relays are self-powered, compatible with 50 or 60 Hz power systems, and have three protection elements: one time overcurrent (51) element and two instantaneous overcurrent (50) elements.

  • Page 12: Time Overcurrent (51) Element

    curves, and instantaneous or integrating reset characteristics. Switch location and description is provided in Section 2. Advantages BE1-50/51B-235 and BE1-50/51B-236 overcurrent relays have many advantages over other overcurrent relays. The primary advantages are: • Time characteristics are defined by equations and graphs •...

  • Page 13: Instantaneous Overcurrent A (50-A) Element

    Instantaneous Overcurrent A (50-A) Element BE1-50/51B-235 Pickup Setting Range: 2 to 99 Aac Setting increment: 1 Aac Sum of ±2% and ±25 mAac Accuracy: BE1-50/51B-236 Pickup Setting Range: 0.4 to 19.8 Aac Setting increment: 0.2 Aac Sum of ±2% and ±5 mAac Accuracy: Dropout Dropout occurs at 95% of pickup value.

  • Page 14: Current Sensing Input

    Current Sensing Input BE1-50/51B-235 Continuous Rating: 14 Aac∗ 1 Second Rating: 400 Aac ∗ Continuous rating is 14 Aac for temperatures up to 45°C. See Figure 1-1 for derating curve. Continuous Current Current Sensing Input Ambient Temperature (C) Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-235) BE1-50/51B-236 Continuous Rating: 2.8 Aac∗...

  • Page 15: Figure 1-3. Current Sensing Input Burden (Be1-50/51B-235)

    BE1-50/51B-235 Burden Figure 1-3 illustrates the current sensing input burden characteristic. At 0.5 Aac: 2.8 Ω At 5.0 Aac: 0.3 Ω BE1-50/51B-230 CT Burden BE1-50/51B-235 CT Burden Input Current (Amps) Figure 1-3. Current Sensing Input Burden (BE1-50/51B-235) BE1-50/51B-236 Burden Figure 1-4 illustrates the current sensing input burden characteristic. At 0.1 Aac: 57.0 Ω...

  • Page 16: Frequency Response

    Frequency Response A change of ±5 Hz from the nominal 50/60 Hz current causes <0.5% change in the current required for pickup. Transient Response <10% overreach with system time constants up to 40 ms. Harmonic Rejection Rejection of odd and even harmonics is illustrated in Figure 1-5. Figure 1-5.

  • Page 17: Type Tests

    Inductive Ratings 120/240 Vac, 125/250 Vdc: Make and carry 30 amperes for 0.2 seconds, carry 7 amperes for 2 minutes, 3 amperes continuously, and break 0.3 ampere. (L/R = 0.04). Terminal Assignments 51 Element: 1, 10 50-A Element: 1, 10 50-B Element: 2, 10 Type Tests...
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  • Page 19: Section 2 • Controls And Indicators

    SECTION 2 • CONTROLS AND INDICATORS TABLE OF CONTENTS SECTION 2 • CONTROLS AND INDICATORS ..................2-1 INTRODUCTION............................ 2-1 FRONT PANEL CONTROLS AND INDICATORS................. 2-1 CIRCUIT BOARD CONTROLS......................2-3 Figures Figure 2-1. Front Panel Controls and Indicators ..................2-1 Figure 2-2. Circuit Board Controls ......................2-3 Tables Table 2-1.
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  • Page 21 SECTION 2 • CONTROLS AND INDICATORS INTRODUCTION BE1-50/51B-235 and BE1-50/51B-236 relay controls and indicators are located on the front panel and circuit board. FRONT PANEL CONTROLS AND INDICATORS Front panel controls and indicators are illustrated in Figure 2-1 and described in Table 2-1. The locators and descriptions of Table 2-1 correspond to the locators shown in Figure 2-1.

  • Page 22: Target Indicators

    Table 2-1. Front Panel Controls and Indicators Locator Description Instantaneous Overcurrent Manual Trip Jacks. These jacks are used to manually trip a breaker controlled by the 50-A trip output contacts. This is achieved by plugging a jumper wire, terminated with two standard 0.08 inch diameter phone-tip plugs, into the two jacks. These jacks do not activate the 50-B trip output contacts.
  • Page 23 CIRCUIT BOARD CONTROLS Circuit board controls consist of two rotary selector switches, a four-position slide switch, and two jumpers. Circuit board controls are illustrated in Figure 2-2 and described in Table 2-2. The locators and descriptions of Table 2-2 correspond to the locators shown in Figure 2-2. Figure 2-2.
  • Page 24 Table 2-2. Circuit Board Controls Locator Description Target Operating Current Jumpers. Two user-adjustable jumpers control the range of trip circuit current required to operate the time overcurrent (51) and instantaneous overcurrent A (50-A) target indicators. Jumper J1 sets the minimum current range for the 50-A target indicator and J2 sets the minimum current range for the 51 target indicator.

  • Page 25: Section 3 • Functional Description

    SECTION 3 • FUNCTIONAL DESCRIPTION TABLE OF CONTENTS SECTION 3 • FUNCTIONAL DESCRIPTION ................... 3-1 INTRODUCTION............................ 3-1 FUNCTION BLOCK DESCRIPTIONS ....................3-1 Current Sensing Input ........................3-1 Power CT and Power Supply ......................3-1 Signal Conditioning ..........................3-1 Microprocessor ........................... 3-1 Outputs ...............................
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  • Page 27 SECTION 3 • FUNCTIONAL DESCRIPTION INTRODUCTION This section illustrates and describes the functional capabilities of the BE1-50/51B-235 and BE1-50/51B- 236 relays. FUNCTION BLOCK DESCRIPTIONS The function blocks of the BE1-50/51B-235 and BE1-50/51B-236 relays are illustrated in Figure 3-1 and described in the following paragraphs. Figure 3-1.
  • Page 28 Power-off sensing circuits measure the voltage across a capacitor at power-down and power-up. These circuits determine how long power has been removed based on the difference voltage and the circuit’s RC time constant. This provides information from the integrating reset function even when power has been entirely removed.

  • Page 29: Section 4 • Installation

    SECTION 4 • INSTALLATION TABLE OF CONTENTS SECTION 4 • INSTALLATION ........................4-1 GENERAL .............................. 4-1 FACTORY SETTINGS........................... 4-1 INSTALLATION............................4-1 CONNECTIONS ............................ 4-2 APPLICATION COORDINATION ......................4-3 MAINTENANCE ............................. 4-4 STORAGE.............................. 4-4 Figures Figure 4-1. Typical AC Connections......................4-2 Figure 4-2.
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  • Page 31: Section 4 • Installation

    • Insert the new relay cradle and close the cradle latches locking the relay into the case. • 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 32: Connections

    CONNECTIONS Typical ac and dc connections are shown in Figures 4-1 and 4-2. Figure 4-1. Typical AC Connections BE1-50/51B-235/-236 Installation 9252000898 Rev —...

  • Page 33: Application Coordination

    Figure 4-2. Typical DC Connections APPLICATION COORDINATION In a typical application coordination scheme, a BE1-50/51B-235 or BE1-50/51B-236 is 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 BE1-50/51B-235 or BE1-50/51B-236 is configured with the following settings: •...

  • Page 34: Maintenance

    BE1-50/51B-235 and BE1-50/51B-236 relays require no preventative maintenance other than periodic checking of relay connections to make sure that they are clean and tight. If the relay fails to function properly, contact the Technical Sales Support department of Basler Electric. STORAGE This device contains long-life aluminum electrolytic capacitors.

  • Page 35: Section 5 • Testing

    SECTION 5 • TESTING TABLE OF CONTENTS SECTION 5 • TESTING ..........................5-1 INTRODUCTION............................ 5-1 DIELECTRIC TEST ..........................5-1 TEST PROCEDURES ........................... 5-1 Model BE1-50/51B-235 (Five Ampere Sensing Input)............... 5-1 Time Overcurrent (51) Pickup......................5-1 Time Dial............................5-2 Integrating Reset ..........................5-2 Instantaneous Overcurrent A (50-A) Pickup...................
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  • Page 37: Section 5 • Testing

    SECTION 5 • TESTING INTRODUCTION Proper relay operation may be confirmed by performing the test procedures in this section. DIELECTRIC TEST In accordance with IEC 255-5 and IEEE C37.90-1989, one-minute dielectric (high potential) tests may be performed as follows: All circuits to ground: 2,828 Vdc or 2,000 Vac Input to output circuits: 2,828 Vdc or 2,000 Vac...

  • Page 38: Time Dial

    Set INST PICKUP (50-A) to 90. g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) to F0 (15.0 Aac). 2. Apply and increase current to terminals 8 and 9 until the Active/Pickup LED turns red. The applied current should be no greater than 0.55 Aac.

  • Page 39: Instantaneous Overcurrent B (50-B) Pickup

    SW3-1 = ON for 50 Hz operation or OFF for 60 Hz operation SW3-2 = OFF (no additional time delay for the 50-A element) SW3-3 = ON (Westinghouse/ABB type characteristic curves) SW3-4 = ON (integrating reset characteristic) c. Set TIME DIAL to 0.0. d.

  • Page 40: Target Indicators

    2. Apply and slowly increase current to terminals 8 and 9 until the 50-B output contacts close. The applied current should be between 1.935 and 2.065 Aac. 3. Decrease the applied current until the 50-B output contacts open. 4. Set INST PICKUP (50-B) to 80 (8.0 Aac). 5.

  • Page 41: Manual Trip

    7. Apply 2 Aac to terminals 8 and 9 to trip the 50-A relay output. 8. Slowly increase the target current source and verify that the Instantaneous target operates at the level of current determined by the Target Operating Current Jumpers. 9.

  • Page 42: Model Be1-50/51B-236 (One Ampere Sensing Input)

    Model BE1-50/51B-236 (One Ampere Sensing Input) Time Overcurrent (51) Pickup 1. Connect and configure the relay for 51 pickup testing: a. Connect the test setup shown in Figure 5-4. b. Set circuit board switch SW3 as follows: SW3-1 = ON for 50 Hz operation or OFF for 60 Hz operation SW3-2 = OFF (no additional time delay for the 50-A element) SW3-3 = ON (Westinghouse/ABB type characteristic curves) SW3-4 = ON (integrating reset characteristic)

  • Page 43: Instantaneous Overcurrent A (50-A) Pickup

    d. Set CURVE to V. e. Set TIME PICKUP to 0.2. Set INST PICKUP (50-A) to 18.0. g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) to F0 (3.0 Aac). 2. Apply 0.8 Aac to terminals 8 and 9. After the unit trips, remove the applied current for 29 ±0.25 seconds, then reapply the current (0.8 Aac).

  • Page 44: Instantaneous Overcurrent B (50-B) Pickup

    Instantaneous Overcurrent B (50-B) Pickup 1. Connect and configure the relay for 50-B pickup testing: a. Connect the test setup shown in Figure 5-5. b. Set circuit board switch SW3 as follows: SW3-1 = ON for 50 Hz operation or OFF for 60 Hz operation SW3-2 = OFF (no additional time delay for the 50-A element) SW3-3 = ON (Westinghouse/ABB type characteristic curves) SW3-4 = ON (integrating reset characteristic)

  • Page 45: Manual Trip

    d. Set CURVE to S. e. Set TIME PICKUP to 0.2. Set INST PICKUP (50-A) to 18.0. g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) at F0 (3.0 Aac). 2. Apply 0.4 Aac to terminals 8 and 9 to trip the 51 relay output. 3.
  • Page 46 d. Set CURVE to S. e. Set TIME PICKUP to 0.2. Set INST PICKUP (50-A) to 18.0. g. Set INST PICKUP (50-B) (accessed at the top side of the assembly) at 20 (0.4 Aac). 2. Apply 0.18 Aac to terminals 8 and 9 (0.18 Aac provides relay operating power but is below the pickup threshold.) 3.
  • Page 47 APPENDIX A • CHARACTERISTIC CURVES TABLE OF CONTENTS APPENDIX A • CHARACTERISTIC CURVES..................A-1 INTRODUCTION............................A-1 INSTANTANEOUS OVERCURRENT CHARACTERISTICS ..............A-1 Timing..............................A-1 Pickup..............................A-1 TIME OVERCURRENT CHARACTERISTICS ..................A-1 Inverse Time Functions ........................A-2 Characteristic Curve Groups ......................A-2 Timing Accuracy..........................A-17 Fixed Time Characteristic.........................A-17 INTEGRATING TIME RESET CHARACTERISTIC ................A-17 Figures Figure A-1.
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  • Page 49: Appendix A • Characteristic Curves

    APPENDIX A • CHARACTERISTIC CURVES INTRODUCTION This appendix describes and defines the instantaneous overcurrent, time overcurrent, and integrating time reset characteristics of the BE1-50/51B-235 and BE1-50/51B-236 relays. INSTANTANEOUS OVERCURRENT CHARACTERISTICS Timing The instantaneous characteristic curves of the BE1-50/51B-235 and BE1-50/51B-236 relays are similar to standard electromechanical instantaneous units.
  • Page 50 Inverse Time Functions 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 A, B, C, N, K = constants for the particular curve Characteristic Curve Groups Either GE IAC or ABB characteristic curve groups are selected through switch SW3-3.
  • Page 51 Characteristic Curves Figures A-2 through A-15 illustrate the BE1-50/51B-235 and BE1-50/51B-236 time overcurrent characteristic curves. Figure A-2. Short Inverse (S) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-2) 9252000898 Rev — BE1-50/51B-235/-236 Characteristic Curves...
  • Page 52 Figure A-3. Long Inverse (L) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-5) BE1-50/51B-235/-236 Characteristic Curves 9252000898 Rev —...
  • Page 53 Figure A-4. Definite Time (D) Time Characteristic Curve (Similar to ABB CO-6) 9252000898 Rev — BE1-50/51B-235/-236 Characteristic Curves...
  • Page 54 Figure A-5. Moderately Inverse (M) Time Characteristic Curve (Similar to ABB CO-7) BE1-50/51B-235/-236 Characteristic Curves 9252000898 Rev —...
  • Page 55 Figure A-6. Inverse (I) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-8) 9252000898 Rev — BE1-50/51B-235/-236 Characteristic Curves...
  • Page 56 Figure A-7. Very Inverse (V) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-9) BE1-50/51B-235/-236 Characteristic Curves 9252000898 Rev —...
  • Page 57 Figure A-8. Extremely Inverse (E) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-11) 9252000898 Rev — BE1-50/51B-235/-236 Characteristic Curves...
  • Page 58 Figure A-9. BS142 Very Inverse (BS142-B) Time Characteristic Curve A-10 BE1-50/51B-235/-236 Characteristic Curves 9252000898 Rev —...
  • Page 59 Figure A-10. BS142 Extremely Inverse (BS142-C) Time Characteristic Curve 9252000898 Rev — BE1-50/51B-235/-236 Characteristic Curves A-11...
  • Page 60 Figure A-11. Short Inverse (S2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 55) A-12 BE1-50/51B-235/-236 Characteristic Curves 9252000898 Rev —...
  • Page 61 Figure A-12. Long Inverse (L2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 66) 9252000898 Rev — BE1-50/51B-235/-236 Characteristic Curves A-13...
  • Page 62 Figure A-13. Inverse (I2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 51) A-14 BE1-50/51B-235/-236 Characteristic Curves 9252000898 Rev —...
  • Page 63 Figure A-14. Very Inverse (V2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 53) 9252000898 Rev — BE1-50/51B-235/-236 Characteristic Curves A-15...
  • Page 64 Figure A-15. Extremely Inverse (E2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 77) A-16 BE1-50/51B-235/-236 Characteristic Curves 9252000898 Rev —...
  • Page 65 Timing Accuracy Timing accuracy is the sum of ±1 cycle, ±2%. This accuracy applies to the range of 1.3 to 40 times tap and is for a given measured multiple of tap. Measurement accuracy of the multiple of tap is the sum of ±2%, ±25 mA for the BE1-50/51B-237 and ±2%, ±5 mA for the BE1-50/51B-238.
  • Page 66 Instantaneous Reset Reset occurs within 16 ms of when the current decreases to 95% of the pickup level. A-18 BE1-50/51B-235/-236 Characteristic Curves 9252000898 Rev —...
  • Page 67 ROUTE 143, BOX 269 HIGHLAND, IL 62249 USA http://www.basler.com, info@basler.com PHONE +1 618-654-2341 FAX +1 618-654-2351...

This manual is also suitable for:

Be1-51b-235Be1-51b-236Be1-50b-236

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