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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.

INTRODUCTION

This Instruction Manual provides information concerning the
operation and installation of the BE1-81 Digital Underfrequency Relay.
To accomplish this, the following is provided.

Specifications

Functional Characteristics

Mounting Information

Connections

Testing

Содержание BE1-81

Страница 1: ... 05647 6 10 07 14 6 70 4 4 37 0 4 1 2WDNKECVKQP 4GXKUKQP ...

Страница 2: ...procedures presented in this manual INTRODUCTION This Instruction Manual provides information concerning the operation and installation of the BE1 81 Digital Underfrequency Relay To accomplish this the following is provided Specifications Functional Characteristics Mounting Information Connections Testing ...

Страница 3: ...5 Basler Electric Co Highland IL 62249 May 1996 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 The availability and design of all features and options are subject to modification without notice Should further information be required contact Basler Electric C...

Страница 4: ...old Setting Comparator 3 3 Definite Time Delay Circuit Timing Option E1 3 3 Inverse Time Delay Circuit Timing Option D1 3 3 Relay Output 3 3 Internally Operated Target Driver 3 4 Current Operated Target Driver 3 4 Target Indicator 3 4 SECTION 4 INSTALLATION 4 1 General 4 1 Relay Operating Precautions 4 1 Dielectric Test 4 1 Relay Mounting 4 1 S1 Case Panel Drilling Diagram Semi Flush Mounting 4 2 ...

Страница 5: ...w 4 12 Connections 4 13 AC Sensing Input Connections 4 13 DC Control Connections 4 14 Internal Connections Style Number T E 1 A0S5 4 15 Internal Connections Style Number T E 1C A2S5 4 16 SECTION 5 TESTING 5 1 General 5 1 Test Setup 5 1 Definite Time Delay Option E1 Test Procedure 5 2 Inverse Time Delay Option D1 Test Procedure 5 3 SECTION 6 MAINTENANCE 6 1 General 6 1 In House Repair 6 1 Storage 6...

Страница 6: ...5 hertz increments below nominal system frequency The inverse time delay characteristic is inversely proportional to the magnitude of the frequency difference between the measured waveform and the trip frequency setting This time may be adjusted to correspond to a particular characteristic curve by a continuously adjustable front panel time dial Refer to Figures 1 1 and 1 2 Relay Assembly The rela...

Страница 7: ...BE1 81 General Information 1 2 Figure 1 1 Inverse Time Curves 50 Hertz Option ...

Страница 8: ...BE1 81 General Information 1 3 Figure 1 2 Inverse Time Curves 60 Hertz Option ...

Страница 9: ...would have the following T Single phase sensing input type 1 120 Vac 60 hertz nominal sensing input range E One normally open relay output E1 Definite time delay C Internal operating power obtained from 125 Vdc or 100 120 Vac external source A One internally operated target 0 Internal relay operating power independent of sensed voltage N No Option 2 available 0 No auxiliary output F Semi flush mou...

Страница 10: ... hertz styles Target Indicators Function targets may be specified as either internally operated or current operated by a minimum of 0 2 ampere through the output trip circuit When current operated the output circuit must be limited to 30 amperes for 0 2 seconds 7 amperes for 2 minutes and 3 amperes continuously Internally operated targets must be specified if the breaker control trip circuit is ac...

Страница 11: ...on 1500 Vac at 60 hertz for one minute in accordance with IEC 255 5 and ANSI IEEE C37 90 1989 Dielectric Test Radio Frequency Maintains proper operation when tested for interference in accordance with Interference RFI ANSI IEEE C37 90 1989 Trial Use Standard Withstand Capability of Relay Systems to Radiated Electromagnetic Interference from Transceivers UL Recognized UL Recognized per Standard 508...

Страница 12: ...ts to indicate that the relay power supply is functioning C TRIP FREQUENCY HZ BELOW 60 HZ switches Three thumbwheel switches set the trip frequency in increments of 0 05 hertz between 45 and 50 hertz 50 hertz styles or 55 and 60 hertz 60 hertz styles The switch settings then display the frequency in hertz below the nominal system frequency at which the relay trip threshold is set D Target Reset Le...

Страница 13: ...BE1 81 Controls And Indicators 2 2 Figure 2 1 Location Of Controls And Indicators Option E1 ...

Страница 14: ...BE1 81 Controls And Indicators 2 3 Figure 2 2 Location Of Controls And Indicators Option D1 ...

Страница 15: ...BE1 81 Controls And Indicators 2 4 Figure 2 3 Location Of Assemblies ...

Страница 16: ...o both the 50 hertz and 60 hertz underfrequency relays Refer to Figure 3 1 for a typical functional block diagram Sensing When single phase 120 Vac is applied to the sensing input the input transformer provides the proper signal levels to the voltage inhibit and input conditioning circuits Figure 3 1 Functional Block Diagram ...

Страница 17: ...er Supply Status Contacts Power supply voltages are monitored on the mother board Normal supply voltage causes the power supply status relay to be continually energized However if at any time the voltage falls below requirements the relay drops out and closes the normally closed contacts Voltage Inhibit Circuit This circuit prevents the relay from tripping because of transient underfrequency condi...

Страница 18: ...equency Threshold Setting Comparator This circuit counts the number of pulses coming from the frequency difference circuit and compares it with the front panel control setting When the frequency decreases beyond the difference established by the front control an output pulse is applied to the appropriate timing circuit Definite Time Delay Circuit Timing Option E1 The definite time delay circuit co...

Страница 19: ...he trip circuit Current Operated Target Driver This circuit will operate when a minimum dc current of 0 2 amperes flow in the output trip circuit A special reed relay in series with the output contact provides the signal to the target indicator Target Indicator The target trip indicator is visible at the front panel The target is magnetically latched and must be reset manually after the fault cond...

Страница 20: ...rrent operated targets 2 Do not touch target indicator vanes Always reset targets by use of the target reset lever 3 The relay is a solid state device If a wiring insulation test is required remove the connecting plugs and withdraw the cradle from its case 4 When the connecting plugs are removed the relay is disconnected from the operating circuit and will not provide system protection Always be s...

Страница 21: ...BE1 81 Installation 4 2 Figure 4 1 S1 Case Panel Drilling Diagram Semi Flush Mounting Figure 4 2 S1 Case Outline Dimensions Front View ...

Страница 22: ...BE1 81 Installation 4 3 Figure 4 3 S1 Case Single Ended Semi Flush Mounting Side View ...

Страница 23: ...BE1 81 Installation 4 4 Figure 4 4 S1 Case Single Ended Semi Flush Mounting Outline Dimensions Rear View ...

Страница 24: ...BE1 81 Installation 4 5 Figure 4 5 S1 Case Single Ended Projection Mounting Panel Drilling Diagram Rear View ...

Страница 25: ...BE1 81 Installation 4 6 Figure 4 6 S1 Case Single Ended Projection Mounting Rear View ...

Страница 26: ...BE1 81 Installation 4 7 Figure 4 7 S1 Case Single Ended Projection Mounting Side View ...

Страница 27: ...BE1 81 Installation 4 8 Figure 4 8 S1 Case Double Ended Semi Flush Mounting Side View ...

Страница 28: ...BE1 81 Installation 4 9 Figure 4 9 S1 Case Double Ended Semi Flush Mounting Outline Dimensions Rear View ...

Страница 29: ...BE1 81 Installation 4 10 Figure 4 10 S1 Case Double Ended Projection Mounting Panel Drilling Diagram Rear View ...

Страница 30: ...BE1 81 Installation 4 11 Figure 4 11 S1 Case Double Ended Projection Mounting Rear View ...

Страница 31: ...BE1 81 Installation 4 12 Figure 4 12 S1 Case Double Ended Projection Mounting Side View ...

Страница 32: ...relay Except as noted previously connections should be made with minimum wire size of 14 AWG Typical AC circuit connections are shown in Figure 4 13 and typical control circuit connections in Figure 4 14 Internal connections are shown in Figures 4 15 and 4 16 Terminals 3 and 4 are external relay power supply voltage inputs and are not polarity sensitive When the sensing input power supply Option 1...

Страница 33: ...BE1 81 Installation 4 14 Figure 4 14 DC Control Connections ...

Страница 34: ...BE1 81 Installation 4 15 Figure 4 15 Internal Connections Style Number T E 1 A0S5 ...

Страница 35: ...BE1 81 Installation 4 16 Figure 4 16 Internal Connections Style Number T E 1C A2S5 ...

Страница 36: ...suring test equipment Functional tests performed with test equipment with an overall accuracy of less than the accuracy of the relay may be useful to the extent that they verify relay operation and approximate relay characteristics However tests performed under these conditions will not verify or produce calibrations any better than the test equipment accuracy as a result tolerances may be outside...

Страница 37: ...y adjust variable test frequency source output down toward the pickup threshold until the relay operates Check that target indicator if applicable has tripped Current operated targets require a minimum of 0 2 amperes dc in the trip circuit for proper operation Step 8 Read the trip frequency as indicated by the frequency source or by an external frequency measuring device The pickup point should be...

Страница 38: ... inverse time delay perform the following steps Step 1 Connect the relay as shown in Figure 5 1 Step 2 Apply appropriate ac or dc voltage to terminals 3 and 4 for relay styles equipped with external power supply Apply 120 Vac 50 hertz or 60 hertz as applicable at terminals 6 and 7 for relay styles equipped with sensing input power supply option 1 2 Step 3 Set test frequency select switch to 50 or ...

Страница 39: ...frequency select switch to the variable position Step 16 Read the trip delay time indicated by the counter Record the delay time and compare it to the applicable delay curve shown in Section 1 to determine if the delay time is within the specified 15 percent tolerance Step 17 Using the 60 hertz 0 TIME curve in Section 1 as an example the time delay recorded in Step 16 for a 60 hertz relay should b...

Страница 40: ...the 0 TIME curve until the vertical HERTZ BELOW PICKUP 2 hertz and curve intersect Read the corresponding delay on the TRIP TIME SECONDS axis Step 24 Progressively decrease test variable oscillator frequency in 1 hertz steps to 46 hertz for the 50 hertz T2 or to 56 hertz for the 60 hertz T1 Record the resultant time delays as provided in the previous steps Step 25 Using the delay times recorded in...

Страница 41: ...ed component values may be obtained from the schematics or the parts list of the Service Manual Replacement parts may be purchased locally The quality of replacement parts must be at least equal to that of the original components Where special components are involved Basler Electric part numbers may be obtained from the number stamped on the component or assembly the schematic or parts list These ...

Страница 42: ...nnected to ten coaxial binding posts Fingers on the black side are connected to the inner binding posts black thumb nuts and tap into the relay internal circuitry Fingers on the red side of the test plug are connected to the outer binding posts red thumb nuts and also connect to the relay case terminals When testing circuits connected to the bottom set of case terminals the test plug is inserted w...

Страница 43: ...nual to conform with the current instructional manual style and relay configuration 14138 04 18 96 B Added Case Size to Section 1 Specifications Corrected Table 2 1 Callout letters A and F Changed mounting illustrations in Section 4 Installation to make all illustrations more uniform in symbol size Added ground connection to Figure 4 13 and changed the title to AC Sensing Input Connections Changed...

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