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Power Products ALPHA C-20, Operating Manual

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Power Products ALPHA C-20 Operating Manual Download Page 24

 

 

 
 

 

 
 
 
 
Designer and manufacturer of aircraft lead-acid and nickel-cadmium battery support 
equipment since 1980. Headquarters and main plant located in Novato, California. 
Technical support in California and New York. 
 

 

ACTIVATOR 282  

2 ampere automatic charger for 24 
volt aircraft batteries combining the  
charger and battery quick disconnect  
as one unit - no charge cables. 115/ 230 V.  

NSN: 6130-01-226-6998 

 

CA-1550  

Combined 25 ampere charger  
and 60 ampere discharge unit 
 in compact transit case. 115/ 230 V. 

 

ALPHA C-25 

0-25 ampere dual constant-current 
and constant-potential charger. 
Adjustable for all types of aircraft 
and other batteries. 115/230 V. 

NSN:  6130-01-462-6335 
 

6130-21-258-4429 (Canada)

 

 

BETA D-50 

0-50 ampere constant-current 
discharge unit for all types of aircraft 
and other batteries. 115/230 V. 

NSN:  6130-01-462-6337 
 

6130-21-258-4430 (Canada)

 

Headquarters: 
Power Products Inc.  
27 Pamaron Way, Suite E  
Novato, CA 94949  
Tel: (415) 883-6300  
Fax: (415) 883-6302  
www.power-products.com 

Engineering: 
Power Products Inc.  
522 East 85th Street  
New York, NY 10028 
Tel: (212) 737-1777 
Fax: (212) 472-0570

 

www.power-products.com 

Summary of Contents for ALPHA C-20

Page 1: ...ALPHA C 20 25 BATTERY CHARGER OPERATING MANUAL Power Products Inc 27 Pamaron Way Suite E Novato CA 94949 Tel 415 883 6300 Fax 415 883 6302 www power products com www power products com ...

Page 2: ...ATION FOR CHARGING 9 3 4 VERIFY END VOLTAGE 10 3 5 CHARGE TIME 11 4 CALIBRATION AND MAINTENANCE 15 4 1 OVERVIEW OF CALIBRATION 15 4 2 SHUNT VERIFICATION 16 4 5 OPERATING RANGES 16 4 6 MAINTENANCE 17 5 TROUBLSHOOTING 18 6 SPECIFICATIONS 19 APPENDIX A BATTERY OVERVIEW 20 CLASSES OF BATTERIES 20 SECONDARY BATTERIES 20 LEAD ACID BATTERIES VENTED OR SEALED SLAB 20 NICKEL CADMIUM BATTERIES 20 DEFINITION...

Page 3: ...hree batteries simultaneously lead acid or nickel cadmium The Alpha C 25 allows charging at both constant potential and constant current to give flexibility in selection of charge method The C 25 charger has an adjustable charge current from 0 to 25 amperes Two digital panel meters allow viewing of charge current and voltage They can be switched to allow viewing of either of the two batteries bein...

Page 4: ...rrent or constant potential mode for 12 or 24 volt batteries DIGITAL AMMETER Displays charge current INSTRUCTION PANEL AMPERE ADJUST KNOB Sets current charge ON OFF LAMPS Illuminate to indicate if unit is charging on or not off BATTERY VIEW SWITCH Switches between displaying current and voltage for battery one or battery two AC ON OFF SWITCH Turns unit on or off DC LINE FUSE Fuse protecting DC lin...

Page 5: ...EM OVERVIEW ALPHA C 20 25 CHARGER OPERATING MANUAL V1 0 Page 5 Figure 1 2 Rear view of Alpha C 25 AC LINE FUSE AC VOLTAGE SELECT SWITCH Selects mains input voltage 115 or 230 volts COOLING FANS AC MAINS CABLE ...

Page 6: ...e unit to a wall outlet with a 15 20 ampere capacity Sharing of the line with other equipment may result in erratic operation if other equipment draws high pulse or surge currents NOTE The Alpha C 25 will maintain its operational integrity with line fluctuation less than 10 2 2 TERMINALS The Alpha C 25 is supplied with two DC cables One cable has an aircraft battery quick disconnect connector and ...

Page 7: ...ion in dusty or otherwise dirty air environments will severely reduce the cooling capacity of the fans and can lead to premature failure 3 OPERATING GUIDE This section gives an overview of how to charge a battery using the Alpha C 25 Always refer to the battery manufacturers maintenance manual for their recommended charging methods and settings 3 1 CHARGE CHARACTERISTICS The constant current charg...

Page 8: ...ould never be charged in a constant current mode with a current greater than C1 10 C1 equals the rated capacity of the battery During constant current charging at a rate in excess of C1 10 oxygen is produced at an excessive rate The resulting increasing pressure will cause the cell to vent Venting of gasses results in a depletion of electrolyte As the electrolyte cannot be replaced in a sealed bat...

Page 9: ...rent drops below one ampere The constant current charge method can however be used for reconditioning SLAB s The current must be set low and the timer set to 12 18 hours The battery should be periodically monitored for overheat during reconditioning When the battery begins to accept charge current it can be switched to constant potential charging set to 14 25 or 28 5 volts 3 2 4 NICKEL CADMIUM BAT...

Page 10: ...VOLTAGE The end voltage in all modes can be verified by the following steps 1 turn unit power off 2 disconnect all batteries 3 turn charge current to max 4 turn unit power on and 5 verify the end voltages on the Alpha C 25 digital voltmeter see also section 4 5 on modifying the operating range WARNING Always turn the AC power switch off before connecting or disconnecting a battery NOTE Once set al...

Page 11: ...rged A list of recommended charge times for the most common batteries can be in Appendix C but always refer to your battery manufacturer s maintenance manual for the most accurate information C SET TIMER Set the timer by adjusting the thumb dial to the required charge time D SELECT CHARGE MODE Turn the Charge Mode Select knob to the desired mode 1 Constant potential 14 7 volts 2 Constant current o...

Page 12: ...e battery always use BATTERY 1 output Connect the other end of the cable s to the battery or batteries Ensure the connectors are plugged in completely F SET BATTERY VIEW Set the battery view switch to VIEW BATT 1 G SWITCH ON MAINS POWER Turn on the AC on off power switch The voltmeter reads the battery terminal voltage the ammeter reads zero the Off lamp illuminates and the red LED on the timer is...

Page 13: ...ockwise or to the desired current limit The charge current is displayed on the ammeter as the current is being adjusted J WAIT FOR THE CHARGE TO AUTOMATICALLY COMPLETE During the charging of the battery the battery voltage charge current and elapsed charge time are displayed For the constant current method the current remains constant while the voltage increases during the time of charging For the...

Page 14: ...he current adjusted to a lower value K UPDATE BATTERY RECORDS Record the charge data in the battery records to ensure good maintenance of the battery see Appendix B L SWITCH AC POWER OFF Switch the AC on off switch off before removing the battery NOTE If in emergency it is required to stop charging switch the unit to off When charging is restarted the timer is reset to zero It may be necessary to ...

Page 15: ...olled device not prone to error It cannot be re calibrated but unless an extremely accurate time reading is required an accurate analog or digital stop watch is adequate to validate its accuracy 4 1 3 OPERATING RANGES The Alpha C 25 gives the capabilities to modify the charge voltage in constant potential mode as well as the voltage limit in constant current mode WARNING Calibration should only be...

Page 16: ...ter see figure 4 3 EXTERNAL CALIBRATED MILLIVOLTMETER Figure 4 3 Circuit diagram for shunt verification 4 3 OPERATING RANGES The main Alpha C 25 circuit board P N BD50PC has factory preset trimpots for modifying voltages settings and limits 4 3 1 MODIFYING VOLTAGES FOR CONSTANT POTENTIAL MODE The low charge voltage factory preset at 14 25 volts can be modified by adjusting the R10 trimpot on PCB B...

Page 17: ...ed or worn cable 4 4 3 REPLACEMENT OF FUSES The Alpha C 25 is equipped with three fuses One 20 ampere AC line fuse and two 35 ampere DC line fuses See specification in section 6 for the specific types of fuses required WARNING Disconnect AC voltage and battery before attempting to replace any fuses To replace the AC line fuse unscrew the fuse cover on the rear of the unit and exchange the old fuse...

Page 18: ...in the cable itself Inspect and measure resistance in DC cable and connector If high or intermittent high resistance the cable needs to be replaced The lead acid battery is sulfated Check all terminals Set a low discharge current and look for arching or heat generation The nickel cadmium battery inter cell connectors are loose or contaminated causing high resistance Check all terminals and inter c...

Page 19: ...r from 1 to 999 minutes Accuracy 0 1 Digital Meter Accuracy Voltmeter 0 3 volts Ammeter 0 3 amperes Cooling Fan cooled Housing Aluminum chassis Outer Dimensions Height 14 in 356 mm Depth 15 in 381 mm Width 5 3 4 in 146 mm AC Line Cord AWG 14 3 wire grounded 6 ft long with 115 volt 15 ampere plug User required to change to 230 volt plug DC Discharge Cable Two 4 ft long terminated in ring terminals ...

Page 20: ...s a rechargeable system using acid electrolyte sulfuric acid and water Lead acid batteries may be vented or sealed The advantages of lead acid batteries are that they have a low initial cost require low maintenance and their discard cost is low The SLAB on a per weight basis provides as much power as a nickel cadmium battery Lead acid batteries shed active material from the positive plate proporti...

Page 21: ...or example a battery that discharges at 5 0 amperes for 4 0 hours has delivered 5 0 x 4 0 or 20 ampere hours To convert ampere minutes to ampere hours simply divide by 60 E g 10 amperes x 40 minutes 400 60 ampere hours 6 6 ampere hours CUTOFF VOLTAGE The cutoff voltage is the voltage point on the discharge curve for a specified discharge rate at which the battery or cell is considered to be discha...

Page 22: ... are no warranties which extend beyond the description on the face hereof This warranty is in lieu of all other warranties express or implied POWER PRODUCTS excludes liability for incidental and consequential damages An action for breach of this warranty must be commenced within one year after the breach is or should have been discovered POWER PRODUCTS specifically disclaims all other representati...

Page 23: ...Calibrating instruments used Meter FLUKE Model 8010A 73III DC volts DC mV Shunt EMPRO Standard 0 25 V MV standard EPPLY LABS Standard Cell Digital Timer Calibrated Standard UNIT BATTERY CHARGER MODEL ALPHA C 25 SERIAL _________ CALIBRATION DUE ONCE A YEAR SHIPPED CONDITION _____ CALIBRATED IN TOLERANCE PASSED PROCEDURE 33K6 4 2193 1 ENVIRONMENTAL CONDITIONS 74 F 38 R H DATE OF FIRST USE __________...

Page 24: ...charge unit in compact transit case 115 230 V ALPHA C 25 0 25 ampere dual constant current and constant potential charger Adjustable for all types of aircraft and other batteries 115 230 V NSN 6130 01 462 6335 6130 21 258 4429 Canada BETA D 50 0 50 ampere constant current discharge unit for all types of aircraft and other batteries 115 230 V NSN 6130 01 462 6337 6130 21 258 4430 Canada Headquarter...

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