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Related Manuals for Westinghouse BL-1
Summary of Contents for Westinghouse BL-1
- Page 2 629A28 9 629 A290 Fig. Internal Schematic of the Type BL-1 Single Unit Fig. 2. Internal Schematic of the Type BL-7 Double Unit Relay, with Front and Back Contacts, in the Type Relay, with Front and Back Contacts, in the Type FT21 Case.
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Page 3: Operation Indicator
As the plunger travels upward, performance requirements of the type BL-1 relay. While there are no uniform standards for the overload the disc bridges three silver stationary contacts. The capacities of all types of motors, these relay charac·... - Page 4 Curve 396065 Fig. 3. Current· Time Curves for Normal Applications of the Type BL-1 Relay Covering Range of Full-Load Currents from 2.5 to 3.5 Amperes, Using Pointer Settings marked on Dial. 60-Minute Time-Delay for 125% Load Occurr. i ng after Steady Full-Load.
- Page 5 TYPE BL-1 RELAY-------- ------------ ------------ ------------ �--------� - ' · L _ . _ 4 _ .t o MIN. CURRENT - TIME CURVES FOR TYPE BL-1 RELAY �0 POINTER AT 3.75 AMPS. OVERLOAD APPLIED AFTER MOVING CONTACT REACHES FINAL POSITION FOR INITIAL STEADY LOAD �...
- Page 6 1 000 PERCENT OF FULL-LOAD CURRENT Curve 39 6063 Fig. 5. Current· Time Curves for Special Applications of the Type BL-1 Relay covering Range of Full-Load Currents from 2. 75 to 75 Amperes. Contact Settings Determined by Test for 15-Minute Delay with 125% Load Occurring after Moving Contact reaches Final Position for Steady Full-Load.
- Page 7 396064 Curve Fig. 6. Current- Time Curves for Special Applications of the Type BL-1 Relay Covering Range of Full-Load Currents from 4.0 to 5.0 Amperes. Contact Settings Determined by Test for 15-Minute Delay with 125% Load Occurring alter Moving Contact reaches Final Position lor Steady Full Load.
- Page 8 OPEN I NG {SECONDS) ZERO LOAD BEFORE OVERLOAD �0 1000 PERCEMT OF CURlEMT SETTII8 396061 Curve Fig. Contact-Opening and Reset Time Curyes for the Type BL-1 Relay for Fu/1-Lood Settings of 2.5 to 3.5 Amperes as marked on Dial. Shorting Link Open.
- Page 9 TYPE BL-1 RELAY-------------------------------------------------------- ' - · L _ - � 4 � 1 -� 55 � 3 � - lD RESET CURVES FOR TYPE Bl-1 RELAY AMP. 3.75 AMP. TO 5 RANGE (LINK USED) DIAL SETTINGS (SHORTING LINK CLOS 100% 3.75...
- Page 10 <9 288B836 Fig. External Schematic of the Type BL-1 Double Unit Relay, with Front and Back Contacts in the Type F T21 Case. One-second ratings for the heater are twenty pere point to obtain a 15-minute setting for this value times the maximum full load current setting for the of full load, so Fig.
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Page 11: Contact Ratings
With the low operating temperature of the will ultimately close the relay contacts, but variables type BL-1 relay, it would not be satisfactory to block such as friction and discrepancies in calibration or render inoperative the ambient temperature compen... -
Page 12: Instantaneous Unit
BL-1 relay must have its settings changed receive in normal service, as for example, the starting for faster operation. This rarely should be necessary, current of motor or the magnetizing inrush current of but if it is required the contact setting must be de... -
Page 13: Adjustments And Maintenance
I.L. 41-553.10 TYPE BL-1 RELAY counterclockwise until the contacts just part, its po contacts are closed the plunger butts against the sition may differ slightly from its position when stop with the spring half compressed. With a 1/32 moved clockwise until the contacts just touch. - Page 14 TYPE BL-1 RELAY 0.25 unit, measured at the case terminals, should be The test current should be interrupted as soon as ohm when the shorting link is open and 0.13 ohm when the contacts close in order to avoid possible damage the link is closed.
- Page 15 THICK (l'"OR PANEL U'!>E ,I:::J 0 -32 STUD) TERMINAL AND PANEL DR\LL\NG- OR CUTOUT N\OUNTIN� DE"TAIL'5 PRO;J"E.CT\Ot-t MTG-. (rRONT VIE:W) NOTE: ALL DIMENSIONS IN INCHES 57-D-7901 Fig. 10. Outline and Drilling Plan for the BL-1 Relay in Type FT21 Case.
- Page 16 WESTINGHOUSE ELECTRIC CORPORATION RELAY-INSTRUMENT DIVISION NEWARK, N. J. Printed in U.S.A.