FAQ's
Motorised blinds what are the options and requirements
Almost all types of blinds can be electrically operated. For roller blinds the motor is tubular and fitted within the roller. For Venetian blinds the motor is fitted within the headrail and for vertical blinds on the back of the track. Non-retractable blinds have the motors mounted on one of the racks above the louvers.
Most motors are 240V and larger shutters will be three phase although small blinds can be 12v low voltage. All motors have adjustable built-in limit switches.
Switches should be of an approved type that is retractive (centres to off) or has a push to off facility.
Motors are supplied with a lead of at least a metre from the end of the blind. It is necessary for this to be connected by the electrician to a junction plug or box so that the blind can be easily removed for maintenance.
Most 240v motors are single phase using normal 1.5mm 3 core mains supply to the switch. The cable to the motor must be 4 core There are wires for supply, one for raise and one for lower, a neutral and earth. The load requirement is normally not more than an amp for each motor. Where more than one blind operates from a single switch relays must be used (to prevent feedback overriding the motor limits). They can also serve as motor cable junction boxes.
Low voltage motors have a 2 core cable from the motor. Long cable runs from the power supply could cause voltage drop so should be avoided. The motors can be linked in series, relays are not required.
Installation
Installers and fitters of blinds will not undertake mains wiring as part of their contract as this must be carried out by a qualified electrician. Normally this work is carried out by the site electrician or an electrician familiar with the client’s building. Thus electrical items are supplied only.
The blind fitter is responsible for final testing and commissioning and setting the motor operating limits. Usually the blinds are tested from an independent power source before final connection.
Linked Information:
Automatic control systems what are the options
Home Management Systems how do I link to my blind controls
Switches can the ones for the motorised blinds match my others?
Awkward shapes?
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