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Multi-Amp CB-832, Instruction Manual

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Multi-Amp CB-832 Instruction Manual Download Page 1

 

 

Part 

 12470 

 

Rev. 2  3/25/99 

 
 
 
 
 
 
 
 
 
 
 
 

 

INSTRUCTION MANUAL 

 
 

 

For 

 
 

 

HIGH CURRENT TEST SET 

 
 

MODEL CB-832 

 
 
 

 

 

 
 
 
 
 
 
 
 
 
 

 
 

It is essential that this instruction book be read thoroughly before putting the equipment in service.

 

 
 

Advanced Test Equipment Rentals

www.atecorp.com  800-404-ATEC (2832)

®

Established 1981

Summary of Contents for CB-832

Page 1: ...ON MANUAL For HIGH CURRENT TEST SET MODEL CB 832 It is essential that this instruction book be read thoroughly before putting the equipment in service Advanced Test Equipment Rentals www atecorp com 8...

Page 2: ...ly reserves to itself all rights to such proprietary information as well as all rights under any such patent none of which is waived by the submission of this instruction manual to anyone The recipien...

Page 3: ...6 D Overload Capacity 7 III TEST PROCEDURES 8 A Maintenance of Motor Overload Relays 8 1 Planned Maintenance Program 10 2 Time Delay 11 3 Instantaneous Element 13 B Maintenance of Molded Case Circuit...

Page 4: ...complete working understanding of the CB 832 test set It is divided into five main sections SECTION I Gives a description of the test set Gives basic guidelines on the different applications performe...

Page 5: ...essential that the technician properly and effectively ground earth the test set This is accomplished by connecting the input line cord to a properly grounded receptacle CAUTION The input voltage of t...

Page 6: ...er output circuit of CB 832 against overloads CONTROL FUSE Protects instrumentation and control circuitry against overloads OUTPUT CONTROL Variable autotransformer provides continuous non stepped outp...

Page 7: ...power remains energized but output current remains de energized and timer will not count AMMETER LED displays show the numeral one in the left most position when the meter is over ranged RANGE SWITCH...

Page 8: ...not connect CONTACTS binding posts to an energized circuit STOP MODE Switch Selects either current actuated position to stop the current output and timer or either of the two external contact stop mod...

Page 9: ...ome experimentation and will be easier as familiarity increases NOTE There is no relationship between the ammeter ranges and the ratings of the output terminal All ammeter ranges can be used in conjun...

Page 10: ...00 amperes may be drawn at any voltage from 0 3 5 volts for 15 minutes provided the test set is subsequently de energized for 30 minutes b 353 5 amperes 70 7 of 500 amperes may be continuously drawn a...

Page 11: ...ference to tables or charts supplied by the manufacturer of the overload relays and motors Whenever a motor trips out it is poor practice to uprate the overload relay indiscriminately the motor may ac...

Page 12: ...nergy in the spring This interrupts the circuit of the holding coil in the motor starter and shuts down the motor The starter may be reset only after the temperature of the heater has cooled sufficien...

Page 13: ...ossible for dirt or dust created by conditions in the plant to prevent parts of the relay from moving These same conditions can also prevent the proper dissipation of normal heating resulting in unnec...

Page 14: ...load relay Connect other end of this lead to the appropriate output terminal see SELECTION OF OUTPUT TERMINAL 4 Connect test set to suitable single phase power supply 5 Turn test set on with POWER ON...

Page 15: ...may decrease fall off during the test because the resistance or impedance of the test circuit increases as it heats up Rotate OUTPUT CONTROL knob clockwise to keep test current at desired value 15 Wh...

Page 16: ...Open Contacts of overload relay to binding posts of test set labeled CONTACTS 9 Select appropriate timer STOP MODE 10 Select desired timer display mode and range 11 Rotate OUTPUT CONTROL knob clockwis...

Page 17: ...e is sometimes referred to as the jogging or step method For nearly all applications this method works best however there is another method referred to as the run up method Instead of the OUTPUT MODE...

Page 18: ...ual inspections and electrical tests A brief outline is given below 1 Clean All types of molded case circuit breakers should be externally cleaned so that the heat produced in normal operation can be...

Page 19: ...ument displays should light 6 Use RANGE Switch to select ammeter range so test current will be near full scale and no less than 10 of full scale 7 Put ammeter DISPLAY MODE Switch in MEMORY position 8...

Page 20: ...r impedance of the test circuit increases as it heats up Rotate OUTPUT CONTROL knob clockwise to keep test current at desired value 14 When circuit breaker trips timer stops and output is de energized...

Page 21: ...sition 9 Select desired timer display mode and range 10 Rotate OUTPUT CONTROL knob clockwise and momentarily press OUTPUT MODE Switch in MOMENTARY release Observe current reading retained by ammeter I...

Page 22: ...ings and brush es can cause premature wear down of the brush es and carbon buildup see SERVICE DATA GROUND FAULT ELEMENT 1 Set up CB 832 with a POWER ON OFF Switch in OFF position instrument displays...

Page 23: ...OUTPUT CONTROL knob at maximum clockwise rotation return knob to zero and transfer output lead to the next higher voltage lesser current terminal Proceed with current adjustment as in Steps 10 and 11...

Page 24: ...cloth can be dampened with an approved solvent that does not attack the finish or leave residue 2 Control Panel The control panel can be wiped clean with a soft dry cloth Do not wipe the meter lenses...

Page 25: ...SRO number will be assigned for proper handling of the unit when it arrives at the factory If desired a letter with the SRO number and instructions can be provided Provide the factory with model numbe...

Page 26: ...mps and shocks of shipping via common commercial carrier For example you may wish to reship your unit to Multi Amp for annual calibration certification OPERATIONAL ERRORS TROUBLESHOOTING Some operatio...

Page 27: ...ts connector has come loose from the PCB d Triac failure 5 Same as above will not initiate in N O or N C Contacts mode a Faulty test leads b Incorrect test scheme for stop mode selected c Contacts bei...

Page 28: ...quipment which has damage or cause of defect due to accident negligence improper operation faulty installation by the purchaser or improper service or repair by any person company or corporation not a...

Page 29: ...Part 12470 Rev 2 3 25 99 26 SECTION V SCHEMATICS...

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