M.C. MILLER 12830 Operating Manual Download Page 26

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MCM JR-2 Current Interrupter

11640 US Hwy 1, Sebastian FL 32958

Tel: 772-794-9448 ~ Fax: 772-589-9072
E-mail:

[email protected]

~ Web Site:

www.mcmiller.com

Instruments and Equipment for the Corrosion Engineer

Figure 10

Replacing the Fuses:

Figure 11

Figure 12

Summary of Contents for 12830

Page 1: ...MAN090 Model JR 2 Current Interrupter Operating Manual Revised August 19 2011 Catalog 12830 ...

Page 2: ... the Interrupter in the Rectifier 9 AC DC Current Carrying Limits 11 Example 1 Delayed Start Interruption Begins Later 12 Example 2 Intermediate Start Cycle Begins Now 13 Example 3 Extended Delayed Start Next Day 15 Synchronizing a Model JR 2 16 Maintenance 17 Repairs 18 Low Battery Indication 18 Supply Voltage Selection 18 Charging the Battery 19 Replacement Parts Appendix 1 How to change the vol...

Page 3: ... obligation is limited to the repair or replacement of the defective unit or its components at the option of M C Miller Co Inc M C Miller Co Inc is not responsible for products which have been subject to misuse alteration accident or for repairs not performed by M C Miller Co Inc Instruments must be returned properly packed with the transportation charge prepaid to M C Miller Co Inc 11640 US Hwy 1...

Page 4: ... of l0 KW loads Reactive Also multiple unit synchronous operation is guaranteed for a normal five day workweek The JR 2 is sync and program compatible with all other models of the Model JR family of current interrupters Features Synchronization with any number of Model JR current interrupters Five functions programmable from the front panel keypad Night latch automatically stops relay in closed po...

Page 5: ... each start up Synchronization Multiple units may be synchronized before or during operation Re synchronization The JR 2 calculates when the relay should be switching based on start time This allows the re synchronization of an existing unit or insertion of additional units during a test in progress Charging System A unique three step system provides faster recharging longer battery life and tempe...

Page 6: ...aled Tactile feedback 16 key Arrangement 5 function keys Time Set Start Set Stop Set 6 On cycle Off cycle 10 digit keys 0 9 1 Enter Key ENTER CYCLE RANGE 1 to 999 9 seconds On Cycle and Off Cycle AUTO START Start Set Programmable delayed Start from 1 minute to 24 hours in one minute increments AUTO STOP Stop Set 6 Programmable Stop from 1 minute to 24 hours in one minute increments NOTE Always sto...

Page 7: ...ifetime 15 hours Since power is required to hold the relay open in the case of the JR2 battery lifetimes will be shorter for longer Off time duty cycles SIZE Exterior Dim 10 5 8 x 9 11 16 x 6 7 8 Metric Dim 269 875 x 246 050 x 174 625 mm WEIGHT 14bs Net weight 6 4 Kg NOTE The JR 2 needs to be put in an Upright Position in order for the unit to Work The Mercury Relay will not work if it is lying on...

Page 8: ...LCD Display Window F Low Battery Indicator G Rectifier Condition Indicator H Display Area for Clock Time Starting Time Countdown Timing and Settings for ON Cycle and OFF Cycle I Keyboard for Setting Times ON Cycle OFF Cycle and Activating Clock Vero Beach Florida 32960 Model JR 2 CURRENT INTERRUPTER Open POWER On On CHARGER START RELAY Off Closed SYNC Mercury Relay Must be Upright in Order to Oper...

Page 9: ...ram which will be overwritten by the next entries The uses for the JR 2 are too numerous to list The following examples will serve as both a set up programming and typical use guide These examples assume instant off testing of multiple rectifier cathodic protection on a structure Note ALWAYS USE THE MILITARY TIME FORMAT WHEN ENTERING TIME DATA FOR EXAMPLE 18 00 INSTEAD OF 6 00 PM Installation of t...

Page 10: ...nts and Equipment for the Corrosion Engineer 10 When using the JR 2 to interrupt on the DC side the indicated polarities should be observed to reduce wear of the plating on the plunger of the mercury relay Warning Always observe the proper safety procedures when working on electrical equipment Turn off all live wires before inserting the current interrupter ...

Page 11: ... Interrupter 11640 US Hwy 1 Sebastian FL 32958 Tel 772 794 9448 Fax 772 589 9072 E mail sales mcmiller com Web Site www mcmiller com Instruments and Equipment for the Corrosion Engineer 11 AC DC Current Carrying Limits ...

Page 12: ...hed They will be installed in the rectifiers before 8 00 am At 8 00AM the JR 2 s will start their On Off cycle and remain cycling until 5 00PM the same evening At this time the JR 2 s will shut the relay and wait until 8 00AM the next morning before resuming interruption Test Requirements On Cycle 2 seconds Off Cycle 5 seconds Work Schedule Start at 8 00 A M Stop at 5 00 P M and repeat for XXX day...

Page 13: ...us locations for installation Testing may begin at 8 00 A M Example 2 Immediate Start Cycle Begins Now The JR 2 s will be put in place after interruption cycle begins In other words the units will be synched after the Start cycle time has occurred It is 2 30 in the afternoon and the JR 2 s are in one location ready to be synched They will be installed in the rectifiers later The JR 2 s will start ...

Page 14: ...N CYCLE 2 0 ENTER 2 sec 2 00 6 Press OFF CYCLE 5 ENTER 0 5 sec 50 7 Interconnect SYNC jacks on all units daisy chain fashion 8 Press CLOCK SET 1 4 3 2 2 32PM press ENTER 14 32 9 When present time your wrist watch reads 2 32 Press ENTER once on one unit only 14 32 10 At 14 32 all units will display LOCh This is a countdown operation to show that the units are performing a calculation When the calcu...

Page 15: ...ollow Example 1 Display Reading 1 Press START SET 3 2 0 0 ENTER 32 00 In short add 24 00 to desired start time eg 31 00 would be 7 00 A M plus 24 hours 31 00 Miscellaneous Features If STOP SET is not desired continuous cycling program STOP SET to an illegal time eg 24 01 To create a MASTER unit which never starts cycling program STOP SET to equal START SET Correcting Keypad Entry Errors Press The ...

Page 16: ...nt Therefore the JR 2 s are constructed so that any one of the operating units may be used as a master to restart the failed slave unit Simply take the slave unit to the working master location and follow the procedure below The JR 2 s automatically output a trigger pulse to the SYNC receptacle once a minute when running Procedure 1 Turn the slave unit to be resynched OFF and then ON 2 Check or se...

Page 17: ...ave is now resynched and may be returned to service NOTE The above method may be used to synch the JR 2 s one at a time as needed For example there were 6 JR 2 s to be installed over a long distance by one individual One JR 2 could be started and kept in the truck as a master At each location a single JR 2 could be started and installed using the above method Maintenance A few routine maintenance ...

Page 18: ...rtion of the display window Approximately two hours of operating time remains when the indicator displays Supply Voltage Selection for charging and or powering the unit For the JR2 model with the 3 pin socket mounted on the front of the unit case handle side The input voltage supply voltage setting is established via the fuse selector by the customer A small bag with the fuse and the fuse holder i...

Page 19: ... continuous basis If continuous charging during storage is performed the circuit will automatically maintain a full charge regardless of the temperature The battery charging time will depend on the status of the battery prior to beginning the charging process Typical charging times for GREEN light observation are as follows Fully discharged battery approx 11 hours 40 discharged battery approx 5 ho...

Page 20: ...ting appropriate for your country However since it is extremely important that the input voltage setting match the AC supply voltage applied to the unit for charging and or powering purposes it is critical that you check to make sure that the setting is correct for your application To do so examine the panel directly above the 3 pronged socket The input voltage setting will be indicated by whichev...

Page 21: ... points down to the 120V label on the PCB as shown in Figure 6 Step 3 Rotate the clear plastic guide as shown in Figure 7 until the guide points down to the 240V label as shown in Figure 8 Step 4 Re install the PCB as shown in Figure 9 making sure that the lettering on the PCB faces into the housing and the PCB is firmly seated In this example once the panel door is firmly closed the plastic indic...

Page 22: ... the set of two fuses as shown in Figure 13 and replace the fuses as necessary be careful not to break the retaining posts The fuses are 5mmx20mm 250V 2A fast acting fuses and these fuses protect the unit regardless of the input voltage setting 120V or 230V Note Replacement fuses must have these same specifications Step 4 After replacing the fuses re install the fuse holder Note Make sure that the...

Page 23: ...t Interrupter 11640 US Hwy 1 Sebastian FL 32958 Tel 772 794 9448 Fax 772 589 9072 E mail sales mcmiller com Web Site www mcmiller com Instruments and Equipment for the Corrosion Engineer 23 Figure 1 Figure 2 Figure 3 ...

Page 24: ...t Interrupter 11640 US Hwy 1 Sebastian FL 32958 Tel 772 794 9448 Fax 772 589 9072 E mail sales mcmiller com Web Site www mcmiller com Instruments and Equipment for the Corrosion Engineer 24 Figure 4 Figure 5 Figure 6 ...

Page 25: ...t Interrupter 11640 US Hwy 1 Sebastian FL 32958 Tel 772 794 9448 Fax 772 589 9072 E mail sales mcmiller com Web Site www mcmiller com Instruments and Equipment for the Corrosion Engineer 25 Figure 7 Figure 8 Figure 9 ...

Page 26: ...er 11640 US Hwy 1 Sebastian FL 32958 Tel 772 794 9448 Fax 772 589 9072 E mail sales mcmiller com Web Site www mcmiller com Instruments and Equipment for the Corrosion Engineer 26 Figure 10 Replacing the Fuses Figure 11 Figure 12 ...

Page 27: ... 2 Current Interrupter 11640 US Hwy 1 Sebastian FL 32958 Tel 772 794 9448 Fax 772 589 9072 E mail sales mcmiller com Web Site www mcmiller com Instruments and Equipment for the Corrosion Engineer 27 Figure 13 ...

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