Biddle CB-7100-Series_UG 电路图.pdf

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1、RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 Part _ 12436 Rev. 0 INSTRUCTION MANUAL INSTRUCTION MANUAL For For CIRCUIT BREAKER TEST SETS CIRCUIT BREAKER TEST SETS MODEL CB-71XX MODEL CB-71XX SERIAL NO. It is essential that this instruction book be read thoroughly before pu

2、tting the equipment in service. It is essential that this instruction book be read thoroughly before putting the equipment in service. Part _ 12436 Rev. 0 IMPORTANT The information and data contained within this instruction manual are proprietary with AVO MULTI-AMP Corporation. The equipment describ

3、ed herein may be protected by one or more U.S. letters patent. AVO MULTI-AMP specifically 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 recipient, if a Gov

4、ernment agency, acknowledges that this instruction book and the equipment described were procured with Limited Rights to technical data as described in ASPR 9-203 (b). Copyright AVO MULTI-AMP Corporation, 1991 TABLE OF CONTENTS TABLE OF CONTENTS SECTION PAGE SPECIFICATIONS.Bulletin CB FUNCTION OF CO

5、NTROLS Maximum output. Position 8. The OUTPUT SELECTOR switch is interlocked with the output initiating circuit. Depressing the switch to change positions operates the interlock and de-energizes the output. VERNIER CONTROL Provides fine adjustment of the output between steps of the OUTPUT SELECTOR s

6、witch. INITIATE Button: Energizes the output and starts the timer. EXT. INIT. An external switch can be plugged into (External Initiate) Jack: this jack to provide remote initiation of the test set. The jack is wired in parallel with the INITIATE button. CONTACTS Binding Posts: These binding posts f

7、acilitate connection to a set of contacts on the device under test to monitor contact opening or closure. The timer stops and the test set is de-energized when the device operates. Part _ 12436 Rev. 0 2 CONTINUITY Panel Lamp and Jack: This jack is wired in series with a green panel lamp so that cont

8、act action or circuit continuity can be monitored. Circuit Breaker: Functions as the input POWER ON/OFF switch and also provides short-circuit and overload protection. POWER ON Panel Lamp: Indicates when the circuit breaker is ON and input power is available. AMMETER RANGE Switch: Selects the full s

9、cale range of the ammeter. AMMETER: Indicates output current. CONTROL FUSE (1.5A): Protects the control circuit. TIMER: This is a specially designed electronic digital timer for indicating the elapsed time of the test in either seconds or cycles. The timer automatically starts at the beginning of ea

10、ch test and stops when the device under test operates. TIMER OPERATION SELECTOR Switch: This six-position switch selects which of the three modes of operation is to be used to control the output and timer operation. The three modes of operation are described below: (1) N.O. (Normally Open): When the

11、 device to be tested has normally open contacts (such as an overcurrent relay) this type of operation is used. In this position, the timer will run from the initiation of the test until closure of the contacts connected to the CONTACTS binding post. (2) N.C. (Normally Closed): When the device to be

12、tested has normally closed contacts (such as a multi-pole circuit breaker), this type of operation is used. In this position, the timer will run from the initiation of the test until the opening of the contacts connected to the CONTACTS binding post. Part _ 12436 Rev. 0 3 (3) C.A. (Current Actuator)

13、: When the device to be tested has no contacts other than those involved in the passing of test current (such as a single pole circuit breaker), this type of operation is used. In this position, the timer will run from the initiation of the test until the test circuit is interrupted. See Service Dat

14、a section for information on sensitivity and adjustment of current actuator The above three modes of operation can be used in either the MAINT. (maintained) or MOM. (momentary) positions. (1) MAINT. In this position, when the INITIATE button is pressed, the control circuit is sealed-in to maintain t

15、he output of the test set until the device under test operates. This is the normal position for timing tests. (2) MOM. In this position, the output of the test set is on only as long as the INITIATE button is held closed. This position is normally used when setting the test current prior to the timi

16、ng test. Part _ 12436 Rev. 0 4 AMMETER CIRCUIT:AMMETER CIRCUIT: The output current of Multi-Amp Circuit Breaker Test Sets is read on an ammeter connected to the output circuit by appropriate current transformers and an AMMETER RANGE switch. The desired full scale value of the ammeter is selected by

17、means of the AMMETER RANGE switch and by utilizing the correct common terminal. The proper common terminal must be utilized in order to connect the correct current transformer into the circuit. See SELECTION OF COMMON TERMINAL. The meter is a 4.5 inch square iron-vane instrument of 1% full scale acc

18、uracy. Whenever using an indicating instrument of full scale accuracy, the user should choose a range to give an indication as close to full scale as possible (upper 1/3 of scale). It should be noted that there is no relationship between the ammeter ranges and the rating of the output terminals. ANY

19、 AMMETER RANGE CAN BE USED WITH ANY OUTPUT TERMINAL. The ammeter is equipped with an adjustable pointer pre-set mechanism, by which means the ammeter pointer may be preset to any position on the scale and held there with no current in the meter circuit. This is a mechanical operation accomplished by

20、 means of an insulated knob on the front of the meter. It is used to overcome the inertia of the moving system of the meter so that currents of short duration can be set or read accurately. In use, the pointer is mechanically preset approximately 1/8 inch below the desired current. The device under

21、test is connected to the test set and the output is slowly increased while the INITIATE button is periodically pulsed. Some quivering of the pointer will be seen as the output current approaches the preset value. Continue to increase the output until the meter pointer lifts off the preset mechanism

22、and moves up scale to the desired test current. Hold the INITIATE button long enough to be certain the ammeter needle has stabilized. Part _ 12436 Rev. 0 5 INPUT AND OUTPUT CIRCUITS INPUT AND OUTPUT CIRCUITS INPUT:INPUT: INPUT VOLTAGE: INPUT VOLTAGE: Multi-Amp Circuit Breaker Test Sets are designed

23、to operate from any of several input voltages in order to accommodate the various voltages encountered by users in the field. It is necessary to change the input terminal connections to match the available input voltage. For all units except Model CB-7150, this change is made on a terminal board loc

24、ated inside the top access panel. On Model CB-7150, this terminal board is located inside the left hand door of the Instrumentation and Control section. It is recommended that the test set be disconnected from the source before changing input terminals. NOTE: On Model CB-7150, input voltages of 240

25、volts and below are not recommended for obtaining the maximum output because of the high input line currents involved. INPUT LEADS: INPUT LEADS: Due to the wide variation in individual user requirements with regard to wire sizes, terminations and length of leads, all units are supplied with input so

26、cket and matching plug only. The plug will accept a wide range of wire sizes more than adequate for the duty required. The power source must have sufficient capacity, and the input leads must be large enough to maintain RATED input voltage at the INPUT terminals of the test set. Although the test se

27、ts are designed to operate satisfactorily at 95-105% of rated voltage, any drop in voltage below RATED at the input terminals will result in a proportional decrease in the maximum available output. NOTE: To achieve published output currents, the rated input voltage must be maintained at the test set

28、 terminals during the test. SELECTION OF INPUT LEADS: SELECTION OF INPUT LEADS: When utilizing maximum output from the test sets, the input line currents may be as high as 400% of nameplate rating. The following table has been prepared to aid in selecting the proper wire size for the input leads. To

29、 use the table, follow the four steps listed below: 1. Determine the rated input current from the nameplate on the test set. Be sure to choose the correct current for the input voltage being used. 2. Multiply this value by four. 3. Determine the length of input lead required. This is in circuit-feet

30、, therefore it is the one-way distance from the test set to the power source. 4. Select the proper wire size from the table using factors 2 and 3 above. Example:Step 1 - 100 amperes (from nameplate) Step 2 - 4 x 100 = 400 amperes Step 3 - 60 ft. (Distance from test to input power source.) Step 4 - #

31、2 wire (from chart) Part _ 12436 Rev. 0 6 For safety, a ground wire should be connected to the test set frame. The size of this conductor should be not less than 1/2 the cross section of the current carrying input leads (three-wire sizes less) and in no event smaller than #10. SELECTOR CHART FOR INP

32、UT LEADS OUTPUT:OUTPUT: SELECTION OF OUTPUT TERMINAL: SELECTION OF OUTPUT TERMINAL: Several output terminals at various voltage and current ratings are provided to adapt Multi-Amp Circuit Breaker Test Sets to a wide variety of test circuit impedances. The test sets can be operated most efficiently b

33、y utilizing the terminal with the HIGHEST CURRENT rating consistent with being able to obtain the desired test current. In this way, finer adjustment can be obtained by making maximum use of the variable autotransformer range. Even the smallest currents can be obtained from the highest current termi

34、nals. The LOW CURRENT terminals should be used only when testing high impedance devices where the HIGH CURRENT terminal(s) does not have sufficient voltage to push the desired test current through the device. The operator should start with the highest current terminal and move to a lower current ter

35、minal only when necessary. IT SHOULD BE NOTED THAT THERE IS NO RELATIONSHIP BETWEEN THE AMMETER RANGES AND THE RATING OF THE OUTPUT TERMINAL. ALL AMMETER RANGES CAN BE USED IN CONJUNCTION WITH ANY OF THE OUTPUT TERMINALS. Part _ 12436 Rev. 0 7 SELECTION OF COMMON TERMINAL: SELECTION OF COMMON TERMIN

36、AL: The ammeter circuit of Models CB-7110, CB-7120 and CB-7130 utilizes two current transformers to measure both the very low and high currents available from these units. For the ammeter to correctly read the output current of the test set, the proper common terminal must be selected. When utilizin

37、g an ammeter range associated with the COMMON 1 portion of the AMMETER RANGE switch, COMMON 1 terminal must be used; and, similarly, when utilizing an ammeter range associated with the COMMON 2 portion of the AMMETER RANGE switch, COMMON 2 terminal must be used. OUTPUT CONNECTIONS: OUTPUT CONNECTION

38、S: Models CB-7130, CB-7140 and CB-7150 are equipped with Multi-Amp Stab Adapter Board and Multi-Amp CBS-1 and CBS-2 Stab Sets which accommodate direct engagement of many drawout type circuit breakers to the test set without the use of leads. Additionally, stabs are available for breakers not accommo

39、dated by the CBS-1 and CBS-2 stabs. Contact the factory for further details. On Models CB-7110 and CB-7120, or when testing devices which cannot be connected directly to the stabs of Models CB-7130. CB-7140 and CB-7150, it will be necessary to use test leads. The following information on the selecti

40、on of output leads will provide the user with a guide for choosing the proper test leads for his application. Due to the voltage drop from the inductive reactance of the test circuit, a significant loss of current will result for each inch of test lead. Therefore, when choosing test leads, the lengt

41、h and size of lead chosen will determine the maximum available test current. It is worthwhile to sacrifice cross section of test leads for the sake of reducing length. Every inch of lead that can be eliminated provides worthwhile increases in available test current. Heating is not a significant prob

42、lem in testing, even though the leads become hot. The use of 4/0 welding or motion picture cable is convenient for constructing test leads. Paralleling of sufficient cables provides higher test currents. Each cable can be fitted with a compression lug on each end, then bolted to the output terminals

43、 or stab board of the test set and the breaker. The two cables between the test set and the breaker should be twisted together or bundled with tape or cord to maintain the close proximity which minimizes inductive reactance. It is sometimes necessary to use bus bar in order to obtain the desired max

44、imum current. When using bus bar the buses should be run in parallel and kept as close to one another as possible. Part _ 12436 Rev. 0 8 TEST PROCEDURES TEST PROCEDURES TESTING OF MOTOR OVERLOAD RELAYS:TESTING OF MOTOR OVERLOAD RELAYS: Always refer to the manufacturers literature applicable to the p

45、articular overload relay before testing. The test operator should be familiar with the operating characteristics of the relay, the tolerances applicable to the operating characteristics and any means of adjusting the relay. The test usually performed on these devices is to verify the time delay char

46、acteristics of the relay when subjected to an overload. One test point is usually suggested to establish whether the relay is operating correctly and within the band of the time-current curve for the relay. The suggested test current is three times (3x) the normal current rating of thermal overload

47、relays or three times (3x) the pick-up current (setting) of magnetic overload relays. It is, of course, easiest to make the connections and perform the tests on the relays if they are removed from the starter. However, it is not necessary to remove the relay as long as the power circuit is de-energi

48、zed and the test leads can be connected to the device. The high current leads from the test set to the relay under test should be kept as short as possible and should be twisted to minimize losses caused by inductive reactance. Run the test and note the time required for the overload relay to trip. If the tripping time exceeds the desired value, or if the relay does not trip at all, the relay may not be protecting the motor properly. If the relay operates too quickly, it may result in unnec