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CUSTOM POWER DESIGN
ELECTRONICS CONSULTANTS PROVIDING CUSTOM DESIGN, DEVELOPMENT, TEST & SUPPORT
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Tel: + 44 (0)118 983 1222
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www.custompsudesign.com
USER GUIDE FOR 700 WATT 'HANDY MAINS', 230V AC OUTPUT
NOW WITH FRONT PANEL ON/OFF SWITCH (STILL HAS REMOTE ON/OFF FUNCTION).
OUTPUT SOCKET(S)
UK AND SHUKO
1 x IEC
1 x SHUKO
2 x UK
1 x IEC (58 - 63Hz).
ACCESSORIES:
HIGH VOLTAGES EXIST IN THIS EQUIPMENT. TREAT AS HOUSE MAINS.
GENERAL: Small wall mounting inverters, generating mains level voltage, capable of powering most equipment from
12, 24 or 36 volt battery systems (model specific). Units with other input and output voltages are available. Note that
only heavy duty (high discharge rate) batteries are suitable (so called 'leisure batteries' are unlikely to be able to supply
sufficient current without excessive voltage drop). Models with appropriate output sockets are available to suit all
countries. The output is a stepped AC quasi sine wave of nominally 230V RMS.
The specification allows for up to 700 watts of continuous power to be taken, with 800 watts for up to 5 minutes,
accommodating short term heaters, motor start, etc. New 'POWER PUSH' © surge handling usually allows operation
of equipment drawing a starting surge of over 3 kilowatts. Because the output waveform contains high order harmonics,
any Live to Neutral capacitance, such as is found in equipment mains filters, causes a reduction in conversion efficiency.
Use of the Handy Mains is therefore limited to equipment having less than 2.0uF direct Line to Neutral capacitance.
PFC caps must be removed from fluorescent lights. A filter is available for high capacitance loads.
The battery input is via flat 5 mm screw terminals mounted under the raised body of the unit. The outlet socket earth pin
connects to case and a case grounding terminal is provided.
the input.
On 12 volt systems, the input current drawn is about 1 amp per 10W of final load, 24V systems take 0.5A per 10W and
36V systems take 0.33A per 10W.
A front panel on/off switch is fitted. The unit may however be turned off and on remotely by a low current control input
to the 2.8mm spade terminal. Connecting battery positive to this input turns on the output voltage. This connection
overrides the front panel switch setting when connected to battery positive, turning the unit on (set front panel switch to
OFF position for full remote control). A small switch may be used as the source for the control voltage. Note that the
unit does not draw battery current when turned off.
An audible warning indicates when the battery is becoming discharged. The tone becomes louder as the battery is
progressively discharged, prompting the user to recharge the battery. The unit latches off if the input voltage falls too
low (latch-off may be disabled by changing an internal jumper, call technical enquiries on +44 (0)118 983 1222).
INSTALLATION:
Connection: Refer to Diagram. 700 Watt HANDY MAINS units have 5mm threaded terminals for battery connection
on the raised underside of the unit under a protective cover. Appropriate mating ring terminals are packed with the unit.
The on/off input is via a small spade for which a mating half is also supplied. Wire of at least 12mm
(metal conductor diameter about 5mm) must be used for the battery. See above for recommended Heavy Duty Wiring
Kit, part No. SM2793. The inverter should be mounted close to the battery. Be sure to refit the insulated protective
cover for the terminals.
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SMET Limited.
Registered in England & Wales, Number 6760677.
All manuals and user guides at all-guides.com
A DIVISION OF SMET LTD
Unit 1,The Forge, Reading Road, Burghfield Common, Reading, RG7 3BL.
12V INPUT
SM3185
SM3186
SM3187
SM3188
SM3189
SM2793 Heavy Duty Wiring Kit, 2 metres long, terminated for easy connection to unit.
Registered .Office: Bell House, Ashford Hill Road, Ashford Hill, Berks. RG19 8BB.
24V INPUT
36V INPUT
SM3215
SM3216
SM3217
SM3218
SM3219
The output is ohmically isolated via a safety barrier from
Document 3185E996, Issue 14.
SM3945
SM3946
SM3947
SM3948
SM3949
2
cross section
VAT No. (GB) 944 0645 24
