EPP-R6108 datasheet(72/75 Pages) ABB

72 / 75 page

T 1 & T 1 P LUS T W I L I G H T S W I TC H CO N T R O L A N D AU TO M AT I O N - T EC H N I C A L FE AT U R E S

Example of installation

As shown in the diagrams, one of the possible

options is to install a T1 PLUS twilight switch in

the lighting system of a greenhouse.

When the external light exceeds a certain level

(for example during peak hours in the early

afternoon) the twilight switch activates the roller

blinds, protecting the plants in the greenhouse

against burning by the strong sunlight.

—

When the external light returns to

below the threshold value, the

twilight switch relay opens the

blinds to allow the sunlight to

pass through.

Operating principle

The diagram shows an example of the installation

of the T1 PLUS twilight switch in the lighting

system of a greenhouse. When the external light

exceeds a certain level (e.g. during the warmest

hours of the day, i.e. early afternoon), the device

activates the shading system, e.g. roller blinds.

Thanks to the option to advance or delay the

activation-deactivation time, the T1 PLUS can

also maintain the roller blinds closed in the case

of passing clouds.

Application environments

The installation of the T1 PLUS twilight switch is

particularly useful in settings and situations

where lighting control is required for locations

where there are consistently high brightness

values, thus guaranteeing substantial savings in

energy consumption (greenhouses, arcades,

photovoltaic plants, etc.).

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04 Required light levels

—

05 Excessive light levels

—

T1 PLUS twilight switch

—

T1 PLUS

AUXILIARY

LIGHTING

AUXILIARY

T1 PLUS

sensor

EPP-R6108 데이터시트(PDF) 72 Page - ABB

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