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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
700 WATT 'HANDY MAINS' INVERTERS (115V AND 230V AC).
OUTPUT SOCKET(S)
230V, IEC
230V, UK + SHUKO
230V, SHUKO
230V, UK
115V, IEC 50Hz
115V, IEC 60Hz
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 48V, 60V, 72V, or 84V 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 or 115V 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 (230V) or 4.0uF (115V)
direct Line to Neutral capacitance. Power factor correction capacitors must be removed from
fluorescent lights. A filter is available for high capacitance loads.
The battery input is via flat 4 mm screw terminals mounted under the raised body of the unit. The
unit may be turned off and on remotely, by a low current control input supplied from battery
positive via a small switch. The output is ohmically isolated via a safety barrier from the input.
Connection.
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Registered in England & Wales, Number 2218478. Registered .Office: Bell House, Ashford Hill Road, Ashford Hill, Berks. RG19 8BB. VAT No. (GB) 944 0645 24
A DIVISION OF SMET LTD
Unit 1,The Forge, Reading Road, Burghfield Common, Reading, RG7 3BL.
USER GUIDE FOR
NOW WITH FRONT PANEL ON/OFF SWITCH.
48V INPUT
SM3940
SM3941
SM3942
SM3943
SM4090
SM4091
+
Pos
Battery
_
Neg
Warning: A fuse must be fitted in the battery lead at source.
60V INPUT
SM3950
SM3951
SM3952
SM3953
SM4093
SM4094
+ I/P
Output
Red
L
1
Black
Socket
- I/P
custom@custompsudesign.com
72V INPUT
84V INPUT
SM3955
SM3960
SM3956
SM3961
SM3957
SM3962
SM3958
SM3963
SM4095
SM4097
SM4096
SM4098
E
L
2
Chassis or Ground.
Document 3940E996, Issue 3.
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