Automatic Battery Chargers Specification Sheet

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.
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:–
BC700 (12 V) BC701 (24 V)
Lead Ni-Cd Lead Ni-Cd
Calibration: Acid 9 cell
10 cell
Acid
18 cell
20 cell
Normal operation:
Switch on, VDC 12.6 12.3 13.8 25.4 24.7 27.6
Switch off, VDC 13.7 13.2 14.8 27.4 26.6 29.5
Boost operation:
Switch on, VDC 14.9 13.6 15.0 29.5 27.2 29.9
Switch off, VDC 15.7 14.5 15.9 31.5 28.9 31.9
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).
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.
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.
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.
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
The Generator Controls Division of
R
M020101
Issue 4, revised 07/98
Catalogue section 75
Dimensions (mm)
BC700 BC701
Connection
230V
110V
AC
supply
N
Boost switch/timer
E
Boost
charge
fail
Charge
Fail
BC700/701
+
+
–
–
RCF
battery
Product Specifications
Power supply:
BC700 BC701
Nominal voltages
Voltage ranges
110 or 230 V AC (pin selectable)
95 – 135 V AC or 190 – 270 V AC
Frequency range 45 – 65 Hz.
Power consumption < 80 VA < 160 VA
DC charge output:
Charge current 3 Amps
Switch off threshold range 13.0 – 15.9 V DC 26.1 – 31.9 V DC
Switch on/off hysteresis approx. 1 V DC approx. 2 V DC
Charge fail output:
Type/rating – ve DC (open collector transistor)
max. 150 mA @ 33 V DC
General:
Weight approx. 1.75 kg approx. 2.55 kg
Ambient temperature range –10 to +55
o
C
EMC emission/immunity to EN50081-2/EN50082-2
Since 1939
Frank W. Murphy Manufacturer
PO Box 470248, Tulsa, Oklahoma 74147, USA
Tel: + 1 918 627 3550 Fax: + 1 918 664 6146
email: [e-mail]
web: http://www.fwmurphy.com
Frank W. Murphy Southern Division
PO Box 1819, Rosenberg, Texas 77471, USA
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Frank W. Murphy Ltd.
Incorporating Modex Automation
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Pour service en Français, tél: + 44 1722 410697
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email: [e-mail]
web: http://www.murphyswitch.com
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Frank W. Murphy Ltd. en France
Tel: [phone] Fax: [phone]
Direct usine Tel: + 44 1722 410697
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