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Basler BE-51/27C Instruction Manual

Time overcurrent delay with voltage control
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  • Page 1 +05647%6+10/#07#. 6+/'18'4%744'064'.#; 9+6*81.6#)'%10641. /1&'.$'% 2WDNKECVKQP  4GXKUKQP 0QPG...
  • Page 2 INTRODUCTION This Instruction Manual provides information concerning the operation and installation of BE1-51/27C Time Overcurrent (with voltage control) Relays. To accomplish this, the following is provided. Specifications Functional characteristics Installation Operational Tests Setting Examples Service Manual, publication 9 1372 00 620, is available on special order as an aid in troubleshooting and repair.
  • Page 3 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 COMPANY. It is not the intention of this manual to cover all details and variations in equipment, nor does this manual provide data for every possible contingency regarding installation or operation.

  • Page 4: Table Of Contents

    CONTENTS Section 1 GENERAL INFORMATION Description ..........1-1 Standard Features .
  • Page 5 %106'065%QPVKPWGF Section 4 INSTALLATION - Continued Dielectric Test ......... . . 4-1 Mounting .

  • Page 6: General Information

    (i.e., current level above pickup and voltage level below minimum set point) and operate accordingly. The Basler Electric BE1-60 Voltage Balance relay can prevent such a misoperation where two sources of signal voltage are available. This relay compares the output of two signal sources, to detect an anomaly in one of these sources and block the operation of those devices connected to that signal source.

  • Page 7: Standard Features

    BE1-51/27C General Information STANDARD FEATURES Time Overcurrent Time overcurrent elements pick up over a range of 0.1 to 0.8 amperes, 0.3 to 2.4 amperes, 0.5 to 4.0 amperes, 1.5 to 12.0 amperes, 0.1 to 2.4 amperes, or 0.5 to 12.0 amperes and provide an adjustable time delay that is proportional to the overcurrent.

  • Page 8: Non-Integrating Timing

    BE1-51/27C General Information Timing option Z3 with option 2-D or 2-E, (switch selectable - 16 position) integrating extended B & C curves: Seven integrating inverse time with extended timing range Nine integrating I T with extended timing range Characteristic curves are shown by the graphs in Figures 1-2 through 1-70. Note that each graph (i.e. function) consists of a set of representative curves.

  • Page 9: Sensing Input Range

    BE1-51/27C General Information specified, the front panel TAP selector and the front panel TAP CAL control set the pickup point for all phases. An independent front panel TAP (NEUTRAL) selector and front panel CAL (NEUTRAL) control set the neutral pickup point. Also, for three-phase-and-neutral sensing units, one of the seven sensing input range combinations must be specified.

  • Page 10: Instantaneous Outputs

    Use an extender card (Basler Electric part number: 9 1655 00 100) to test and troubleshoot the relay. An available test plug (Basler Electric part number: 10095 or G.E. part number 12XLA12A1) allows the relay to be tested in place without disturbing external control circuit wiring.

  • Page 11: Specifications

    BE1-51/27C General Information Figure 1-1. Style Number Identification Chart SPECIFICATIONS BE1-51/27C Time Overcurrent Relays electrical and physical specifications are as follows: Rated for 160 Vac continuous at 40 to 70 Hz (nominal frequency 50 or 60 8QNVCIG5GPUKPI+PRWVU Hz), with a maximum burden of 1 VA. Continuously adjustable over the range of 40 to 120 Vac.
  • Page 12 BE1-51/27C General Information Sensing Input Rating The maximum 1 second current rating is 50X (times) maximum tap current selected, or 500 A, whichever is less. Maximum continuous current is 20 A. For ratings other than those specified by the time curves, rating is a calculated as follows: (50 X tap value or 500 A , whichever is less ) Where: I = Maximum Current, and T = Current Flow in Seconds Time Overcurrent Pickup...
  • Page 13 BE1-51/27C General Information Power Supply Input power may be obtained from a variety of ac or dc external power sources. Refer to Table 1-1 for available power supply options Table 1-1. Power Supply Specifications Nominal Input Burden Type Input Voltage Voltage Range Nominal...

  • Page 14: Time Overcurrent Characteristic Curves

    (11" X 17") characteristic curve chart on transparent paper (vellum). Publication 9 1372 00 897 contains 36 full size characteristic curve charts (timing options Z1 and Z2). To order any of these characteristic curve charts, contact Customer Service Department of the Power Systems Group, Basler Electric.

  • Page 15: Controls And Indicators

    SECTION 2 %10641.5#0&+0&+%#6145 GENERAL Table 2-1 lists and briefly describes the operator controls and indicators of the BE1-51/27C Time Overcurrent Relay with voltage control. Reference the call-out letters to Figure 2-1. Table 2-1. Controls and Indicators Letter Control or Indicator Function or Indicator TAP NEUTRAL Selector Provides selection of the neutral overcurrent pickup...
  • Page 16 BE1-51/27C Controls and Indicators Figure 2-1. Location of Controls and Indicators...
  • Page 17 BE1-51/27C Controls and Indicators Table 2-1. Controls and Indicators - Continued Letter Control or Indicator Function or Indicator PUSH-TO-ENERGIZE OUT- Actuation of this function is by a thin non-conducting rod PUT Pushbutton ( do not use a screwdriver ) through a hole in the front panel.
  • Page 18 BE1-51/27C Controls and Indicators Table 2-2. Sensing Input Ranges TAP Range TAP Selector Current Sensing Terminals Plate or Pickup Range 1, Single-Phase † HIGH 2.25 3.00 4.50 5.25 6.75 7.50 9.00 9.75 11.2 12.0 ----- ----- ----- 0.75 1.00 1.50 1.75 2.25 2.50...
  • Page 19 BE1-51/27C Controls and Indicators Table 2-3. Timing Curve Selection Table Selector Selector Standard Extended Standard Extended Timing Type Position Position Curves Curves Curves Curves Z1, Z2 Z1, Z2 Fig. No. Fig. No. Fig. No. Fig. No. B1 - Short Inverse 1-39 1-40 B2 - Long Inverse...
  • Page 20 BE1-51/27C Controls and Indicators...

  • Page 21: Block Diagram Analysis

    SECTION 3 (70%6+10#.&'5%4+26+10 GENERAL BE1-51/27C Time Overcurrent Relays are microprocessor-based devices that provide voltage control of the phase time overcurrent function. BLOCK DIAGRAM ANALYSIS The following block diagram analysis is referenced to Figures 3-1 and 3-2. A microprocessor (not illustrated in Figure 3-2) processes signals, performs logic functions, and all of the time overcurrent computations.
  • Page 22 BE1-51/27C Functional Description Figure 3-2. Functional Block Diagram...

  • Page 23: Voltage Sensing

    BE1-51/27C Functional Description A front panel TAP selector and TAP CAL control are provided for selection and precise adjustment of the time overcurrent pickup point. The front panel TAP selector, a ten-position BCD weighted rotary switch, selects the desired current sensing pickup point, while the front panel TAP CAL control provides precise adjustment between the selected setting and the next lower setting.

  • Page 24: Voltage Inhibit

    BE1-51/27C Functional Description Voltage Inhibit The output of the multiplexor is applied to the voltage inhibit circuit for comparison with a voltage limit set by the front panel VOLTAGE INHIBIT ADJ control. If the (phase) input voltage exceeds this level, the appropriate front panel VOLTAGE INHIBIT indicator will be illuminated and a voltage inhibit signal will prevent the timed output relay and (if present) the auxiliary output relay from energizing.

  • Page 25: Internally Operated Targets

    BE1-51/27C Functional Description Internally Operated Targets Outputs from the overcurrent elements are directly applied to drive the appropriate target indicator. Each indicator is tripped regardless of the current level of the trip circuit. Current Operated Targets This target will operate only when a minimum of 0.2 A flows in the output circuit. A special reed relay in series with the output contact provides the signal to the target indicator.

  • Page 26: Installation

    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. In the event the relay is not to be installed immediately, store the relay in its original shipping carton in a moisture and dust free environment.
  • Page 27 BE1-51/27C Installation NOTE Be sure the relay case is hard-wired to earth ground with no smaller than 12 AWG copper wire attached to the ground terminal on the rear of the relay case. When the relay is configured in a system with other protective devices, it is recommended to use a separate lead to the ground bus from each relay.
  • Page 28 BE1-51/27C Installation Figure 4-2. Typical Sensing External Connections, Sensing Input Type L Figure 4-3. Typical Sensing External Connections, Sensing Input Type P...
  • Page 29 BE1-51/27C Installation Figure 4-4. Typical Sensing External Connections, Sensing Input Type T Figure 4-5. Typical Sensing External Connections, Sensing Input Type A, Open Delta Configuration...
  • Page 30 BE1-51/27C Installation Figure 4-6. Typical Sensing External Connections, Sensing Input Type D, Open Delta Configuration Figure 4-7. Typical Sensing External Connections, Sensing Input Type J...

  • Page 31: Power Supply Type S Input Selection

    BE1-51/27C Installation Figure 4-8. Unit-Connected Generator, Typical Sensing External Connections, Sensing Input Type P POWER SUPPLY TYPE S INPUT SELECTION A field adjustable link is present on the component side of the type S power supply printed circuit board. To select 48 Vdc or 125 Vdc input, disconnect all power from the relay and move the link to the desired position.
  • Page 32 BE1-51/27C Installation Figure 4-10. Typical Internal Diagram, Sensing Input Type L...
  • Page 33 BE1-51/27C Installation Figure 4-11. Typical Internal Diagram, Sensing Input Type J With Power Supply Status...
  • Page 34 BE1-51/27C Installation Figure 4-12. Typical Internal Diagram, Sensing Input Type A With Power Supply Status...
  • Page 35 BE1-51/27C Installation Figure 4-13. Typical Internal Diagram, Sensing Input Type P With Power Supply Status 4-10...

  • Page 36: General

    SECTION 5 TESTS AND ADJUSTMENTS GENERAL Procedures in this section are for use in testing and adjusting a relay for the desired operation in a protective scheme. If a relay fails an operational test, or if an adjustment discloses a faulty relay, refer to Section 6. REQUIRED TEST EQUIPMENT Minimum test equipment required for relay testing and adjustment is listed below.
  • Page 37 BE1-51/27C Tests and Adjustments (c) Sensing Input Type T (Three-Phase with Neutral Sensing). Refer to Figure 5-3. Ensure that the timed output terminals 1 and 10 are connected. Also, verify that either A, B, or C current sense terminals are connected initially (N terminals will be connected later in the test). (d) Sensing Input Type A (Three-Phase Sensing).
  • Page 38 BE1-51/27C Tests and Adjustments Figure 5-2. Test Setup for Sensing Input Type P(Three-Phase Sensing) Figure 5-3. Test Setup for Sensing Input Type T (Three-Phase with Neutral Sensing)
  • Page 39 BE1-51/27C Tests and Adjustments Figure 5-4. Test Setup for Sensing Input Type A (Three-Phase, Delta Configuration) Figure 5-5. Test Setup for Sensing Input Type D (Three-Phase with Neutral Sensing)

  • Page 40: Time Overcurrent Pickup Test

    BE1-51/27C Tests and Adjustments Figure 5-6. Test Setup for Sensing Input Type J (Two-Phase with Neutral Sensing) Time Overcurrent Pickup Test This test will check the minimum and maximum overcurrent pickup points of the time overcurrent element. NOTE During this test, disregard any indication on the test setup timer. Step 1.
  • Page 41 BE1-51/27C Tests and Adjustments Step 6. Slowly increase the current toward the value of the front panel TAP selector A setting until the front panel TIMING indicator illuminates. Do not disturb this setting. Step 7. Record the current reading and remove input current. RESULT: The recorded value should be within ±5% of the front panel TAP selector A setting for the phase minimum overcurrent pickup point for the time overcurrent.

  • Page 42: Timed Output Test

    BE1-51/27C Tests and Adjustments Step 15. Slowly adjust the front panel CAL (NEUTRAL) Control CCW until the front panel TIMING indicator illuminates. RESULT: For the neutral minimum overcurrent pickup point of 0.5 A (Step 16a., above) or 1.5 A (Step 16b., above) the front panel CAL (NEUTRAL) control should be near its maximum CCW limit.
  • Page 43 BE1-51/27C Tests and Adjustments Step 7. Observe that the appropriate front panel TIMING indicator illuminates and when the time delay ends that the timed output relay is energized. RESULTS: (1) The appropriate front panel TIMING indicator extinguishes. (2) The test setup timer stops. (Record count for use in Step 9.) (3) If target type A or B is present: (a) The front panel FUNCTION-TIME target (if present) trips.

  • Page 44: Instantaneous Overcurrent Pickup Test

    BE1-51/27C Tests and Adjustments Step 18. When the time delay ends, the timed output relay is energized. RESULTS: (1) The front panel TIMING (NEUTRAL) indicator extinguishes. (2) The test setup timer stops. (Record count for use in Step 20.) (3) If target Type A or B is present: (a) Front panel FUNCTION-TIME target (if present) trips.
  • Page 45 BE1-51/27C Tests and Adjustments Step 6. Remove input current. Record the test set current setting. RESULT: The recorded value should be equal to or less than the front panel TAP selector A setting for the minimum overcurrent pickup point for the instantaneous 1 overcurrent element.

  • Page 46: Voltage Control Test

    BE1-51/27C Tests and Adjustments Voltage Control Test This test checks the voltage control minimum and maximum limits for the voltage inhibit levels. Step 1. Perform the preliminary instructions. Step 2. Set the front panel TAP Selector to B. Step 3. Adjust the front panel TIME DIAL to 20. Step 4.

  • Page 47: Tap And Tap (Neutral) Selector Setting

    BE1-51/27C Tests and Adjustments TAP and TAP (NEUTRAL) Selector Setting NOTE Selection of one of the specific overcurrent pickup points provided by the front panel TAP Selector (and with the front panel TAP CAL control fully CW) will permit a pickup point within ±5% of the selector value without having to connect the relay to a test setup to verify the setting.

  • Page 48: Time Overcurrent Curve Selection (Timing Type Z1, Z2, And Z3)

    BE1-51/27C Tests and Adjustments Step 4. Adjust the test voltage to 0 Vac and current to the desired time overcurrent pickup point for the relay. Step 5. Set the front panel TAP selector to the closest setting above the desired pickup point. Step 6.

  • Page 49: Time Delay Selection

    BE1-51/27C Tests and Adjustments Time Delay Selection NOTE If Timing Type Z1, Z2, or Z3 is installed, refer to time overcurrent curve selection to obtain the desired set of time overcurrent curves (see Figures 1-2 through 1-70). Then proceed to Step 1, following. If Timing Type Z1, Z2, or Z3 is not installed, determine the timing type from the model and style number for a specific relay.

  • Page 50: Volts Inhibit Adj Or Voltage Inhibit Adj Setting

    BE1-51/27C Tests and Adjustments VOLTS INHIBIT ADJ or VOLTAGE INHIBIT ADJ Setting Step 1. Verify that the test setup is performed. Step 2. Adjust the test voltage to the desired inhibit level (between 40 and 120 Vac). Step 3. Starting at fully CCW, slowly adjust the front panel VOLTS INHIBIT ADJ or VOLTAGE INHIBIT ADJ (move CW) until the appropriate front panel VOLTS INHIBIT or VOLTAGE INHIBIT indicator just illuminates.

  • Page 51: Inst 2 Control Setting

    BE1-51/27C Tests and Adjustments Step 9. Reconnect the output to the neutral current sense terminals. See Figures 5-3, 5-5, or 5-6. Step 10. Set the front panel INST 1 (NEUTRAL) control to a position approximating the desired neutral instantaneous 1 overcurrent pickup point for the relay. Step 11 Apply current to the relay.

  • Page 52: Maintenance

    (refer to Section 5 for operational test procedure). If the relay fails to function properly, and in-house repair is contemplated, consult the Service Manual (publication number 9 1372 00 620). 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 53: Test Plug

    BE1-51/27C Maintenance TEST PLUG Test plugs (Basler part number 10095 or G.E. part number XLA12A1) provide a quick, easy method of testing relays without removing them from their case. Test plugs are simply substituted for the connection plugs. This provides access to the external stud connections as well as to the internal circuitry.

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