Murphy BC701, BC700 User Manual

BC700/701 series

10 cell

18 cell

20 cell

The Generator Controls Division of

R

Boost switch/timer

+

+

–

–

RCF

battery

Frank W. Murphy Manufacturer

web: http://www.fwmurphy.com

Frank W. Murphy Southern Division

Frank W. Murphy Ltd.

Murphek Pty. Ltd.

Murphy Switch of California

Murphy de Mexico S.A. de C.V.

Frank W. Murphy Pte, Ltd.
Frank W. Murphy Ltd. en France

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
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

Acid

Issue 4, revised 07/98

Catalogue section 75

Product Specifications

Power supply:

Nominal voltages
Voltage ranges

BC700 BC701

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 oC
EMC emission/immunity to EN50081-2/EN50082-2

Connection

AC

supply

230V
110V

N

E

Charge

Fail

BC700/701

Boost

Dimensions (mm)

BC700 BC701

M020101

charge

fail

Incorporating Modex Automation

Church Road, Laverstock, Salisbury U.K.

Since 1939

PO Box 470248, Tulsa, Oklahoma 74147, USA
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email: [e-mail]

Tel: + 44 1722 410055 Fax + 44 1722 410088
Pour service en Français, tél: + 44 1722 410697
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web: http://www.fwmurphy.co.uk

Tel: [phone] Fax: [phone]
Direct usine Tel: + 44 1722 410697
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