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Basler BE1-87G Instruction Manual

Be1-87g variable percentage differential relay instruction manual
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  • Page 2 This manual provides information concerning the operation and installation of the BE1-87G Variable Percentage Differential Relay. To accomplish this, the following is provided. Specifications Functional description Mounting information Setting procedure/example. To avoid personal injury or equipment damage, only qualified personnel should perform the procedures presented in this manual.
  • Page 3 Basler Electric Company, Highland, Illinois. http://www.basler.com, infor@basler.com PHONE 618-654-2341 First Printing: December 1985 Printed in USA May 1999 CONFIDENTIAL INFORMATION IT IS LOANED FOR BASLER ELECTRIC ROUTE 143, BOX 269 HIGHLAND, IL 62249 USA FAX 618-654-2351 BE1-87G - Introduction...

  • Page 4: Table Of Contents

    TP-1 And TP-2 On Single-Phase Relays ....5-3 Single-Phase Trip And Dropout Test ..... . . 5-4 BE1-87G - Introduction CONTENTS...
  • Page 5 Storage ..........6-1 SECTION 7 MANUAL CHANGE INFORMATION CONTENTS - Continued BE1-87G - Introduction...

  • Page 6: Section 1 General Information

    BE1-87G Variable Percentage Differential relays typically trip a lockout relay (86) which in turn trips the generator breaker and, when present, the field and/or neutral breakers.
  • Page 7 Figure 1-1. Typical Single-Phase Application Scheme Figure 1-2. Typical Three-Phase Application Scheme BE1-87G - General Information...

  • Page 8: Variable Restraint Characteristic

    (I (five amperes for sensing input type one or one ampere for sensing input type two). The BE1-87G compares the protected zone sensed input and output currents. The lesser of the two sensed current levels becomes the restraining current.

  • Page 9: Style Number Identification Chart

    No option 1 available Push-to-energize outputs (pushbuttons) No auxiliary output contacts Semi-flush mounting Style Number Identification Chart Figure 1-3 is the Style Number identification Chart for the BE1-87G Variable Percentage Differential relay. Figure 1-3. Style Number Identification Chart BE1-87G - General Information...

  • Page 10: Specifications

    SPECIFICATIONS BE1-87G relays are available in single-phase and three-phase configurations, and with the following features and capabilities. Current Sensing Inputs (5 Ampere) Nominally rated at 5 amperes, with a range of 45 to 65 hertz. Maximum current per input: 10 amperes continuous, 250 amperes for 1 second.
  • Page 11 62 to 150 Vdc 250 Vdc 140 to 280 Vdc 230 Vac 190 to 270 Vac Burden at Nominal (Maximum) 5.0 W 5.5 W 14.5 VA 5.5 W 5.5 W 6.0 W 7.0 W 20.0 VA Current BE1-87G - General Information...
  • Page 12 10 to 500 hertz for a total of six sweeps, 15 minutes each sweep. Weight 3-phase: 19.2 pounds maximum. 1-phase: 14.3 pounds maximum. Case Size All units are supplied in an S1 size case. BE1-87G - General Information 2121 Vdc 1500 Vac or 2121 Vdc...

  • Page 13: Controls And Indicators

    SECTION 2 • HUMAN MACHINE INTERFACE (Controls And Indicators) DESCRIPTION Table 2-1 lists and briefly describes the BE1-87G Variable Percentage Differential Relay operator controls and indicators. Reference the call-out letters to Figure 2-1. Table 2-1. BE1-87G Controls and Indicators (Refer to Figure 2-1)

  • Page 14: Section 3 Functional Description

    The functional block diagram in Figure 3-1 illustrates the overall operation of the BE1-87G Variable Percentage Differential Relay. Note that it may be configured to monitor either single-phase or three- phase.

  • Page 15: Stabilizing Reactor

    Stabilizing reactors are current rated based on time and ambient temperature (refer to Section 1, Specifications ). See Figures 3-2 and 3-3 for the stabilizing reactor impedance characteristics. Figure 3-2. Sensing Input Range 1 (5 Ampere), Stabilizing Reactor Impedance Characteristics CURRENT(AMPS) CURRENT(AMPS) BE1-87G - Functional Description...

  • Page 16: Bandpass Filters

    The power supply status output relay (Option 3-6) has normally closed (NC) output contacts. This relay is energized upon power-up and the NC contacts open. Normal relay operating voltage maintains the power BE1-87G - Functional Description ). The restraint current is scaled for a 50% slope above nominal input current ) signal .

  • Page 17: Power Supply

    J, K, Y 48, 125 Vdc, 120 Vac 125, 250 Vdc, 120, 240 Vac Voltage Range 12† to 32 Vdc 24 to 150 Vdc 90 to 132 Vac 62 to 280 Vdc 90 to 270 Vac BE1-87G - Functional Description...

  • Page 18: S1 Case, Outline Dimensions

    SECTION 4 • INSTALLATION GENERAL When not shipped as part of a control or switchgear panel, the relays are shipped in sturdy cartons to prevent damage during transit. Immediately upon receipt of a relay, check the model and style number against the requisition and packing list to see that they agree.

  • Page 19: S1 Case, Double-Ended, Outline Dimensions

    Figure 4-2. S1 Case, Double-Ended, Outline Dimensions, Semi-Flush Mounting, Side View Figure 4-3. S1 Case, Double-Ended, Outline Dimensions, Projection Mounting, Side View BE1-87B - Installation...
  • Page 20 Figure 4-4. S1 Case, Double-Ended, Panel Drilling Diagram, Semi-Flush Mounting Figure 4-5. S1 Case, Double-Ended, Panel Drilling Diagram, Projection Mounting, Rear View BE1-87B - Installation...

  • Page 21: Stabilizing Reactor

    Stabilizing Reactor The stabilizing reactor for a three-phase relay is mounted on the rear of the relay. For projection mounting or convenience, the stabilizing reactor can be removed and relocated. Rewire in accordance with the procedures and illustrations in this section. To remove the stabilizing reactor, remove four screws holding the reactor to the mounting plate.

  • Page 22: S1 Case And Reactor, Outline Dimensions

    Figure 4-7. S1 Case And Reactor, Outline Dimensions (Semi-Flush Mounting) CONNECTIONS Incorrect wiring may result in damage to the relay. Be sure to check model and style number against the options listed in the Style Number Identification Chart before connecting and energizing a particular relay. Relays manufactured prior to July 22, 1991 (EIA date code symbol 9129 and previous) do NOT have case jumpers between terminals 7 and 8 (single phase units).

  • Page 23: Typical Dc Control Connections

    Figure 4-8. Typical DC Control Connections Figure 4-9. Single-Phase Sensing Input Connections BE1-87B - Installation...

  • Page 24: Three-Phase Sensing Input Connection

    Figure 4-10. Three-Phase Sensing Input Connection BE1-87B - Installation...

  • Page 25: Single Phase Internal Connection Diagram

    Figure 4-11. Single-Phase Internal Connection Diagram BE1-87B - Installation...

  • Page 26: Three Phase Internal Connection Diagram

    Figure 4-12. Three-Phase Internal Connection Diagram BE1-87B - Installation...

  • Page 27: Section 5 Testing And Setting

    Digital voltmeter accurate to within 1% or better Digital ammeter accurate to within 1% or better Variable AC/DC ()-250 V) power supply (operating power input) DC power supply (for current operated targets) BE1-87G - Testing And Setting CAUTION Always be sure that external operating (monitored)

  • Page 28: Operational Test Procedure

    2 amperes continuous or 50 amperes for 1 second (sensing input range two) Whenever this current level is exceeded, provisions must be made to cut off the sensing current as the relay trips. WARNING NOTE Figure 5-1. Operational Test Setup BE1-87G - Testing And Setting...

  • Page 29: Tp-1 And Tp-2 On Single-Phase Relays

    Figure 5-2. Location of Assemblies (Single Phase Only) NON-COMPONENT SIDE OF LOWER MAGNETICS/SHIELD BOARD Figure 5-3. TP-1 and TP-2 on Single Phase Relays BE1-87G - Testing And Setting...

  • Page 30: Single-Phase Trip And Dropout Test

    150 milliamperes, whichever is greater. See Figures 5-4 through 5-7 for the operating characteristic curves and trip response timing curve. NOTE (sensitivity switch setting value).  nominal up to a maximum of 20 amperes BE1-87G - Testing And Setting on the...

  • Page 31: Sensing Input Range 1, Operating Characteristics

    Figure 5-4. Sensing Input Range 1, Operating Characteristics BE1-87G - Testing And Setting...

  • Page 32: Sensing Input Range 2, Operating Characteristics

    Figure 5-5. Sensing Input Range 2, Operating Characteristics BE1-87G - Testing And Setting...

  • Page 33: Extended Restraint Operating Characteristic

    Range 1 Range 2 Figure 5-6. Extended Restraint Operating Characteristic BE1-87G - Testing And Setting RESTRAINT CURRENT (AMPERES) MULTIPLES OF PICKUP Figure 5-7. Pickup Response Timing D2354-14 04-30-96...
  • Page 34 = 70% of Vce and 20 X 5 A nominal rating = 100 A so that knee Relative CT Performance Table 5-1 lists the recommended minimum pickup settings to provide security during external faults and switching. BE1-87G - Testing And Setting NOTE is unknown, assume R is unknown, assume R (for phase faults and switching)

  • Page 35: Phases B And C, Trip And Dropout Test

    Significant operating current can also be developed at restraint levels that fall on the flat part of the characteristic if the offset component persists. The sensitivity setting needs to be above this operating current. NOTE BE1-87G - Testing And Setting...

  • Page 36: Setting Example Number One

    = 0.09 + 0.10 = 0.19 ; 5-10 Table 5-1. Recommended Pickup Settings Figure 5-8. Motor Differential Application (Vce) = 50 ; < 0.007(Vce) (Vce) = 100 ; < 0.007(Vce) ), and neglecting the = 0.35 = 0.7 BE1-87G - Testing And Setting...

  • Page 37: Setting Example Number Two

    Since the three-phase fault is involved, one-way lead burden is used to determine the total CT burden. Each phase CT carries just the burden for the lead for that phase. = 0.22 + 0.14 = 0.36 ; = 0.09 + 0.10 = 0.19 ; BE1-87G - Testing And Setting 1000 4.16× 3 138.8 4.6 ×...
  • Page 38 #2 has a C classification. The T classification indicates that the CT has significant secondary leakage inductance which somewhat degrades the transient performance. This is a concern during motor starting because a slowly decaying offset component develops in at least one phase. 5-12 BE1-87G - Testing And Setting...

  • Page 39: Section 6 Maintenance

    SECTION 6 • MAINTENANCE GENERAL BE1-87G Variable Percentage Differential Relays require no preventive maintenance other than a periodic operational test (refer to Section 5 for the operational test procedures). If factory repair is desired, contact the Customer Service Department of the Power Systems Group, Basler Electric, for a return authorization number prior to shipping.

  • Page 40: Section 7 Manual Change Information

    . . .” to “Terminals 7, 13, and 17 are provided for convenience . . .”. Corrected Figures 4-11 and 4-12. Updated this section to show changes. BE1-87G - Manual Change Information Table 7-1. BE1-87G Changes Summary Of Changes >...

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