Murphy Battery Charger BC700 Series User Manual

M020101  
Issue 4, revised 07/98  
Catalogue section 75  
R
The Generator Controls Division of  
BC700/701 series  
AUTOMATIC BATTERY CHARGERS  
3 AMP CONSTANT CURRENT  
The Modex range of 3 Amp constant current chargers  
provide for the fully automatic monitoring and charging of  
standby diesel generator battery packs.  
The advantages of this type of charger are primarily:–  
·
·
·
Rapid recovery of battery charge, equivalent to a  
considerably higher rating ‘taper’ type charger.  
Protection from overcharging. The unit switches off  
automatically once the batteries are fully charged.  
Prolonged battery life, from the reduction of gassing  
and continual exercising of the cells.  
When connected, the charger measures the battery  
terminal voltage. If this is below a pre-calibrated threshold,  
the unit outputs a series of charge pulses to the battery,  
regulating the average current to a constant 3 Amps.  
Product Specifications  
Power supply:  
BC700  
BC701  
Between charge pulses, the BC700 continues to monitor  
the battery terminal voltage. When the measured voltage  
has climbed to a suitable threshold the charger turns off,  
allowing the battery to decay back to the lower voltage  
threshold before the cycle is repeated. The ‘switch off’  
and ‘switch on’ voltage thresholds are factory calibrated  
according to the type of battery used:–  
Nominal voltages  
Voltage ranges  
Frequency range  
Power consumption  
110 or 230 V AC (pin selectable)  
95 – 135 V AC or 190 – 270 V AC  
45 – 65 Hz.  
< 80 VA  
< 160 VA  
DC charge output:  
Charge current  
Switch off threshold range  
Switch on/off hysteresis  
3 Amps  
13.0 – 15.9 V DC 26.1 – 31.9 V DC  
approx. 1 V DC approx. 2 V DC  
BC700 (12 V)  
Lead Ni-Cd  
BC701 (24 V)  
Lead Ni-Cd  
Charge fail output:  
Calibration:  
Acid 9 cell 10 cell Acid 18 cell 20 cell  
Type/rating  
– ve DC (open collector transistor)  
max. 150 mA @ 33 V DC  
Normal operation:  
Switch on, VDC  
Switch off, VDC  
12.6 12.3 13.8 25.4 24.7 27.6  
13.7 13.2 14.8 27.4 26.6 29.5  
General:  
Weight  
Ambient temperature range  
EMC emission/immunity  
approx. 1.75 kg  
–10 to +55 oC  
to EN50081-2/EN50082-2  
approx. 2.55 kg  
Boost operation:  
Switch on, VDC  
Switch off, VDC  
14.9 13.6 15.0 29.5 27.2 29.9  
15.7 14.5 15.9 31.5 28.9 31.9  
Connection  
The rate of the charge/decay cycle depends on the  
capacity and condition of the battery and the static load  
across it (the charger itself presents negligible load).  
charge  
fail  
RCF  
The ‘boost’ mode of operation may be selected by  
linking two terminals, either through a remote panel  
switch, relay or timer. This increases the switch on and  
switch off voltage thresholds, and may be used for short  
periods to increase the battery charge level.  
Charge  
Fail  
230V  
AC  
+
+
battery  
110V  
supply  
BC700/701  
N
E
Boost  
The charge cycle state is indicated by two LEDs:  
amber for ‘on charge’ and green for ‘charge complete’.  
Two –ve DC (open collector transistor) outputs are provided  
for the remote signalling of ‘on charge’ and ‘charger fail’  
conditions.  
Boost switch/timer  
Dimensions (mm)  
The BC700 series uses an open-chassis, metal cased  
design, suitable for bolt or stud mounting in an enclosed  
panel. Electrical connection is by ¼" blade terminals on  
the main PCB.  
BC700  
BC701  
When ordering, please specify:–  
a) Product type: BC700 (12V) or BC701 (24V)  
b) Battery type: lead acid, or number of Ni-Cd cells,  
or special calibration requirements  
Accessories:–  
CVT502/506 Battery voltage trips, DIN rail mounted  
CVT102/106 Battery voltage trips, 11 pin plug-in  
Frank W. Murphy Ltd.  
Frank W. Murphy Ltd. en France  
Frank W. Murphy Southern Division  
Murphek Pty. Ltd.  
Incorporating Modex Automation  
Church Road, Laverstock, Salisbury U.K.  
Tel: +33 (1) 30 76 26 26 Fax: +33 (1) 30 76 39 89 PO Box 1819, Rosenberg, Texas 77471, USA  
1620 Hume Highway, Campbellfield, Vic. 3061 Australia  
Tel: + 61 3 9358 5555 Fax: + 61 3 9358 5558  
Direct usine Tel: + 44 1722 410697  
Tel: + 1 281 342 0297 Fax: + 1 281 341 6006  
email: sales@fwmurphy.com  
Tel: + 44 1722 410055 Fax + 44 1722 410088 email: [email protected]  
Since 1939  
Pour service en Français, tél: + 44 1722 410697  
Frank W. Murphy Manufacturer  
PO Box 470248, Tulsa, Oklahoma 74147, USA  
Tel: + 1 918 627 3550 Fax: + 1 918 664 6146  
email: sales@fwmurphy.com  
Frank W. Murphy Pte, Ltd.  
Murphy Switch of California  
Murphy de Mexico S.A. de C.V.  
email: sales@fwmurphy.co.uk  
No. 2 Tuas South Street 2, Sprintecs Building  
PO Box 900788, Palmdale, California 93590, USA Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje  
02-01/02, Singapore 637895  
Tel: + 1 805 272 4700 Fax: + 1 805 947 7570  
email: sales@murphyswitch.com  
San Luis Potosí, S.L.P. México 78384  
Tel: + 52 48 206264 Fax: + 52 48 206336  
email: murmexsl@sanluis.podernet.com.mx  
Tel: + 65 863 1398 Fax: + 65 863 0208  
email: fwmsales@fwmurphy.com.sg  
 

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