Schneider Electric CCT15225 Acti9 IC Astro 1C Twilight Switch

CCT15225 Acti9 IC Astro 1C programmable astronomic switch

The CCT15225 is an astronomic twilight switch: instead of a light sensor it calculates sunrise and sunset from the geographic position and date, then switches its single changeover contact accordingly. It is part of the Schneider Electric Acti9 IC line, 45 mm wide on TH35 DIN rail, with a backlit LCD and menus in 18 languages. Seven Star LLC supplies the CCT15225 in Oman and the GCC as an independent supplier based in Muscat.

Because there is no photocell, cloud cover, dirt or shading cannot disturb it, which suits external lighting that should follow the sun year-round. The offset can shift switching by up to 120 minutes either side of the calculated time.

CCT15225 technical specifications

How the CCT15225 decides when to switch

The datasheet gives the control type as calculation of sunrise and sunset times, with position setting, weekly programming, holiday schedules and automatic winter/summer changeover among the functions. Operating modes listed are evening on, morning off, evening off morning on (shown as inactive) and timer only. The maximum number of switchings is 84, and accuracy is ± 0.25 s/day 25 °C.

• External input for override
• Code lock function
• Holiday schedules
• Automatic winter/summer time changeover
• On/off permanent switching
• Sunrise/sunset time offset ± 120 min
• Position setting
• Switch preselection

the CCT15225 against sensor-based twilight switches

The IC2000 family reacts to measured brightness, which is simple and local but depends on a clean, well-placed sensor. The IC Astro reacts to calculated time, which is predictable but does not see storms or heavy dust haze. Sites that want darkness-driven switching with a time schedule can use the IC2000P+ CCT15483 with its outdoor sensor.

CCT15225 in the IHP and IC Astro range

The programmable models from this lane compared on datasheet values:

Loads and contact rating of the CCT15225

The contact is rated 10 A – 250 V AC pf = 0.6 and 16 A – 250 V AC pf = 1 with a minimum of 10 mA 230 V AC and 100 mA 24 V AC/DC. Lamp-load limits from the datasheet:

• Incandescent lamp 2600 W
• Halogen lamp 2600 W
• Non-corrected fluorescent tube 2300 VA
• Serial-compensated fluorescent tube 2300 VA
• Parallel compensated fluorescent lamp 730 VA 80 µF
• Compact fluorescent lamp 170 W
• LED lamp < 2 W 30 W
• LED lamp ≥ 2 W 200 W

Heavier or inductive loads should be switched through a contactor, with the timer driving the coil.

Inrush current at switch-on, particularly with LED drivers and electronic ballasts, can exceed the steady rating for a few milliseconds. The lamp-load limits above already account for typical inrush, but groups of many drivers on one contact should be split or switched through a contactor.

Selection checklist for the CCT15225

• Supply: 230 V AC +10 % -15 % at 50/60 Hz.
• Channels needed: 1.
• Control logic: sunrise/sunset calculation.
• Load: inside the load table or through a contactor.
• Temperature: -30–55 °C operating range.
• Options: override input, memory stick, languages.

Installation and commissioning of the CCT15225

Mount this unit on TH35 rail, wire the supply and load with the 0.5 to 2.5 mm² screw terminals described on the datasheet, then set language, date, time and geographic position through the four push-buttons. The unit is Class II, IP20 and overvoltage category 3, so it belongs in a closed board.

After programming, test each output by manual operation, then watch the first scheduled switchings. A code lock function is listed to prevent changes by unauthorised persons, which is worth enabling on shared boards.

Before energising, confirm that the supply on the board matches 230 V AC +10 % -15 % at 50/60 Hz and that the load circuit has its own protective device, since the timer contact is not a short-circuit protection element. Keep control wiring tidy and clear of power cables so the unit’s push-buttons and display remain accessible for later changes, and label the output so maintenance staff know which circuit it controls.

Where the CCT15225 is used in Oman and the GCC

Typical jobs are street, facade, landscape and car-park lighting, mosque and compound lighting, and signage that should follow a daily or weekly routine. In hot and dusty switchrooms keep the board within the -30–55 °C range on the datasheet and avoid direct sun on the enclosure.

In practice many Gulf sites run lighting on a fixed evening-to-dawn pattern all year, and shift pumps, fans or irrigation by season. Document each programmed schedule on a label inside the board door, because a replaced timer comes up blank and the schedule has to be re-entered from the record.

Documents and quotation

The official Schneider Electric datasheet of this unit is attached on this page for download, so every figure above can be checked against the source.

To request a quotation, send us the part number CCT15225, the quantity and the delivery location through the RFQ form. Seven Star LLC replies with availability and lead time.