Megger DDA-1 Instruction Manual Download Page 46

Page: 46 / 49

Summary of Contents for DDA-1

Page 1: ...MANUAL For CIRCUIT BREAKER TEST SETS MODEL DDA 3000 6000 It is essential that this instruction book be read thoroughly by the operator or the test equipment before putting the equipment in service Par...

Page 2: ...ed by one or more U S patents AVO International 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 su...

Page 3: ...PUT CIRCUITS 14 1 INPUT 14 A INPUT VOLTAGE 14 B INPUT LEADS 14 C GROUNDING 14 D SAFETY PRECAUTIONS 14 2 OUTPUT 14 A SELECTION OF OUTPUT CONNECTIONS 14 B OUTPUT CONNECTIONS 15 C DUTY RATINGS AND OVERLO...

Page 4: ...Control System High current output 60 000 A for Model DDA 6000 35 000 A for Model DDA 3000 Digital signal processing DSP technology Variable pulse time and firing angle output current control Complian...

Page 5: ...ets INSTRUMENTATION AND CONTROLS Model DDA l The Digital Data Acquisition instrumentation and control system was deSigned specifically to provide precise control of the output current and accurate met...

Page 6: ...0 and DDA 6000 Universal Circuit Breaker Test Sets Output Current Maximum Continuous Current Maximum Current Maximum Current Through a Through a Short Circuit Breaker Circuit 4500 A 35 000 A 60 000 A...

Page 7: ...autotransformer AT 1 AT 4 Leads included with input autotransformer Interconnect leads 10 ft 3 m 4 0 cable 2 17164 Jumper lead 1 Protective cover Model CBS 3 stabs UK Archcliffe Road Dover CT17 9EN E...

Page 8: ...A 415V 5 50 Hz 200 A 460V 5 60 Hz 350 A 380V 5 50 Hz 350A 415V 5 50 Hz 350 A Output Output Current Maximum Maximum Current Maximum Current Continuous Through a Through a Short Current Circuit Breaker...

Page 9: ...0 281 in 7 mm numerals Ranges 0 0001 to 99999 s 0 0001 to 99999 cycles Accuracy 1 of Reading for times that are 2 cycles and longer Digital Voltmeter Operating Mode Input Voltage Output Voltage Exter...

Page 10: ...ent of the output is accomplished by the combination of the OUTPUT SELECTOR Switch and VERNIER CONTROL This is a multi position switch which provides coarse adjustment of the output Position 1 provide...

Page 11: ...acles for input power connection Test set chassis ground For safety purposes this should be connected to a power system ground This ground connection is part of an interlock circuit that verifies that...

Page 12: ...rations Default setting The output will de energize when the current level drops below 8 of range N O Normally Open When it is desired to control the timer from a set of normally open contacts such as...

Page 13: ...Delay tests VOLTS voltmeter selection Switches 8 VOLTS three different selections are available for display IN When this voltage display selection is made the voltage at the input plugs of the test s...

Page 14: ...Menus for more details 13 Front Panel Indicators Over Range Illuminates to indicate that output current has exceeded the AMMETER RANGE selected Output Energized Illuminates to indicate that the SCR ha...

Page 15: ...SECTION III 1 FRONT PANEL DISPLAY AND PROGRAMMING MENUS 9...

Page 16: ...When pressed the following display will appear B MAIN MENU From the MAIN MENU the user may select programming menus to make adjustments to the LCD display contrast SCR controls or Acquisition control...

Page 17: ...pressing the soft key directly beneath EXIT D SCR CONTROL MENU The SCR CONTROL MENU provides the ability to enter into two different areas of SCR adjustment Pressing the soft key directly beneath PUL...

Page 18: ...ling with asymmetrical waveforms The more inductive the test specimen the more asymmetrical the output of the test set will be due to DC offset Asymmetry in the output of the test set has become of in...

Page 19: ...ut waveform is symmetrical the two measurements will be approximately the same current value If these two measurements are not approximately the same value adjust the firing angle in such a way as to...

Page 20: ...als during the test C GROUNDING For safety ground wires must be connected to the test set chassis in order to energize the test set One ground lead must be connected to the ground terminal located jus...

Page 21: ...ernational Stab Adapter Board and AVO International 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 Additio...

Page 22: ...When using bus bar the buses should be run parallel and kept as close to one another as possible C DUTY RATINGS AND OVERLOAD CAPACITIES AVO International equipment is rated on a continuous duty basis...

Page 23: ...500 A 30 min 30 min 6 000 A 15 min 45 min 15 000 A 2 min 60 min 30 000 A 5 sec 12 min DDA 6000 CURRENT TIME ON TIME OFF 4 500 A Continuous N A 6 250 A 30 min 30 min 10 000 A 15 min 45 min 30 000 A 2 m...

Page 24: ...446 A 30 min 30 min 5 928 A 15 min 45 min 14 820 A 2 min 60 min 29 640 A 5 sec 12 min DDA 6001 6002 CURRENT TIME ON TIME OFF 4 446 A Continuous N A 6 175 A 30 min 30 min 9 880 A 15 min 45 min 29 640 A...

Page 25: ...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 manufacturer s recommended value or if...

Page 26: ...s of the relay being tested I i i I I I I 1 5 Turn test set s ON OFF Switch ON The Control Panel Display should illuminate 6 Set up of controls before testing CONTROL Circuit Breaker OUTPUT SELECTOR S...

Page 27: ...the procedure until the desired test current is reached Since the PULSE OUTPUT MODE is selected the output will only stay energized for programmed number of cycles Default is 5 cycles See PULSE DURATI...

Page 28: ...the time delay element is three times 3x the current rating of the breaker for low voltage power circuit breakers suggested test current is three times 3x the pick up setting of the long time delay el...

Page 29: ...ry contact 5 Turn test set ON OFF circuit breaker ON The Control Panel Display should illuminate 6 Set up of controls before testing CONTROL Circuit Breaker OUTPUT SELECTOR Switch VERNIER CONTROL OUTP...

Page 30: ...the procedure until the desired test current is reached Since the PULSE OUTPUT MODE is selected the output will only stay energized for programmed number of cycles Default is 5 cycles See PULSE DURAT...

Page 31: ...the previous section 6 Select the proper ammeter range so that the instantaneous pick up current of the instantaneous element can be read as near to full scale as possible 7 Place the ammeter mode swi...

Page 32: ...s should be made as to the cause of the trip before changing the rating of the overload relay heater Operating characteristics of the motor overload relay should be verified at regular intervals The i...

Page 33: ...ing iron device is used to produce the delays required and initiate the trip signal to the interrupting device In the most common type of magnetic relay movement of an armature or piston rod is delaye...

Page 34: ...INSPECT SETTINGS Where applicable Most magnetic overload relays have adjustable settings for minimum operating current and time delay characteristics These should be adjusted to the specified settings...

Page 35: ...ew This type breaker may be shipped from the factory with the instantaneous element set at maximum if the setting is not specified by the purchaser therefore it is necessary to check these adjustable...

Page 36: ...years depending upon conditions where the breaker is installed 30...

Page 37: ...ng low voltage power circuit breakers are tripped by the movement of an armature which strikes the trip bar of the breaker The trip bar operates a latch which releases stored energy to rapidly open th...

Page 38: ...he manufacturer s instruction book for the breaker should be read thoroughly and their recommendations for lubricating and clearances should be followed closely 2 TEST The voltage power circuit breake...

Page 39: ...ice Rollers Trio Mechanism Tightened Bolted and Screwed Connections Trip Bar Trip Arm Electrical Tests Inspector Date P 5 I L T D E Std lnst T P T I L T D I Std lnst N p G I L T D 5 Std lnst P L IH I...

Page 40: ...is appropriately illuminated C Press the right hand menu softkey underneath the word exit twice to return to the metering display 2 SERVICE DATA The test set utilizes straightforward circuits and com...

Page 41: ...service desired return address your name and where you can be reached should the factory need to contact you A purchase order number cost limit billing and return shipping instructions may also be pro...

Page 42: ...and workmanship for a period of one 1 year from date of shipment This warranty is limited and shall not apply to equipment which has damage or cause of defect due to accident negligence unauthorized m...

Page 43: ...80V TO 120V T2 N A T3 N A T4 N A T5 634 TRANSF 480 120 OUTPUT ENGR DO MON T6 5533 TRANSF 480 560 LINE VOLTAGE MONITOR T7 50876 TRANSF VARIABLE ASY T9 5323 TRANSF OUTPUT ASY TH1 N A TH2 6 5544 THERMIST...

Page 44: ...7 X X IX I X X X X X X 7 i J I I I 1 1 ml 1 t r fE E3 t tJJltltl ltltl Ai LOWER EN_C_L_O_S_U_R_E _ _____ ____ __ _ ___ _ _ __ 1_ ___ ________ __ 1__ __ t r AI no __ __________ _ I JI o M 1fC II Z c l...

Page 45: ...f i r 1 It_ 1 _ CONT_ CIArNnl g II II l I II 15 101 A2 UPPER ENCLOSURE aIP1II r J q0 J II II I I 1 1 IMI Vf 1 i d fi i I P i n I Ii I P II I I l I i D9 2 stc x9 v2 1 I A2A1 CONTROL PANEL 1 I DEYU DU 1...

Page 46: ...i I I i 111 14 1 1 1 1 j IU I l I I I I I i I I I I I I Iwv WV I l XX XXXX ox iG XXx XXXXx D x X x ox x x i i I i i D I _ J w iii CI CI J o 0 U U Z Z UJ UJ CI CI d 2...

Page 47: ...7 1 C L____1111 itj Ii tUl __A __ L_O_W_E_R_ e_N_C_L_O_S_U_R_E _t___________________ 1 J A2 UPPER ENCLOSURE e II S II I I eN 01 AJW UL t d Ii J P P i n n n p P I i l J I I I I II 0 111 1 f o 0 PT STA...

Page 48: ...a x x x x x X I I t 2 Z t 9 j sa 7 sa 101 9 X X X X X II s c L ____ fI t _ _1_ _ L_O_W_E_R__E_N_C_L_O_S_U_R_E ________________ _____ _DU _____ _______________________ _ r I J A2 UPPER ENCLO SURE V _...

Page 49: ...IIII I ill 1 I i Itttm 1 1 o 0 IIXT aT wn o 0 TJICJII 9 vS 1 I A2Ai CONTROL PANEL T KVlCl _tctaO AHO D M IIIJ o MUCON eJeOOJ PfIIOPIItlIlTAA I onz DWtCD AVO T ALL DaI t 1lAtf PAC NA1HO AOClUCTlON lALl...

Search results

Summary of Contents for DDA-1

Reviews:

Related manuals for DDA-1

Brands by name

Popular brands

Megger DDA-1, Instruction Manual

Search results

Summary of Contents for DDA-1

Reviews:

Related manuals for DDA-1

Brands by name

Popular brands