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BE1-50/51B

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Figure 3 - Instantaneous Characteristics

CO and BS142 curves in 100 and 200 series models:

S

=Short Inverse

M

=Moderately Inverse

B

=BS142 Very Inverse

L

=Long Inverse

I

=Inverse

C

=BS142 Extremely Inverse

D

=Definite Time

V

=Very Inverse

F

=Fixed Time

E

=Extremely Inverse

Figure 2 - Time-Current Characteristics

IAC curves in 200 series models only:

• Short Inverse
• Inverse
• Very Inverse
• Extremely Inverse
• Long Inverse

FUNCTIONAL DESCRIPTION, continued

Figure 4 - Front Panel, S1 Case

Summary of Contents for BE1-50/51B

Page 1: ...echanical reset for all applications Five additional field selectable curves for a total of 15 Five year warranty ADDITIONALINFORMATION INSTRUCTION MANUAL RequestPublication9252000991 TIMING CURVES Re...

Page 2: ...for use in applications requiring time delayed coordination for phase or ground overcurrent condi tions The relay can be used to provide coordinated protection foroverheadandundergrounddistributionci...

Page 3: ...mps 0 2 to 19 8 Amps 2 from 0 1 to 2 from 0 2 to 19 8 Amps in 02 Amp Steps in 0 2 Amp Steps 3 18 Amps Operating power from the power supply is applied to the microprocessor supervisor circuit When the...

Page 4: ...to allow shorting the output terminals to verify external control circuit wiring TARGETS Two target indicators are provided as a standard feature of the BE1 50 51B These magnetically latched current o...

Page 5: ...B BS142 Very Inverse L Long Inverse I Inverse C BS142 Extremely Inverse D Definite Time V Very Inverse F Fixed Time E Extremely Inverse Figure 2 Time Current Characteristics IAC curves in 200 series m...

Page 6: ...des delays of 0 0 to 9 9 seconds corresponding to the dial setting BURDEN Burden is non linear and resistive 5 Amp Unit 4 8 Ohms 0 5A 0 2 Ohms 5A 1 Amp Unit 120 Ohms 0 1A 5 Ohms 1A TARGETS Magneticall...

Page 7: ...BE1 50 51B 7 SPECIFICATIONS continued AGENCY cURusrecognitionperULStandard508 FileE97035 and CSA Standard C22 2 No 14 CASE SIZE A1 or S1 NET WEIGHT 8 6 pounds...

Page 8: ...R NEW INSTALLATION PACKAGES For 5 Amp System CT Secondaries Semi Flush Mounting A1 Size Case BE1 50 51B 105 Drawout Construction Testable in Case BE1 50 51B 205 Projection Mounting S1 Size Case BE1 50...

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