The SDK-2/3 quartz time control switch is made by introducing advanced foreign technology and using imported quartz resonators and CMOS electronic components. It has precise timing, stable and reliable operation, and is a new product in automatic timing control instruments in recent years. In recent years, this product has been sold throughout the country and is highly welcomed by users.  

The SDK-2/3 quartz time controlled switch can be used directly or in conjunction with AC contactors to automatically switch single-phase or three-phase circuits for user control of various electrical appliances. It is suitable for street lamps, neon lights, advertising light boxes, electric bells, ovens, electric furnace bellows, power supply department peak electricity, and automation equipment. It can be used for user automatic tripping and closing, as well as automatic opening of the supply function for the public.

Main technical indicators
1. Travel time accuracy ≤ 1 second/day;
2. Time control accuracy ≤ ± 5 points;
3. The minimum switch period is 1.5 hours; The longest switch period is 24 hours;
4. The operating environment temperature ranges from -20 ℃ to+50 ℃;
5. Contact rated voltage AC 100V, 220V, 380V;
6. Contact rated current (resistive) AC 100V 7.5A, 220V 5A, 380V 2A;
7. Quartz clock power supply DC 1.5V;
8. Dimensions: 190 × 143 × 75mm

Usage
1. Loosen the regulator screws and fix the regulator on the clock face plate as needed. A pair of regulators form an open/close control period, and 1-2 open/close periods need to be controlled every day. Fix 1-2 pairs of regulators on the clock face plate, and after fixing them, the excess regulators must be unscrewed to control the time starting at that time. For example, to control the street lights, turn them on at 7 pm that night and turn them off at 5 am the next morning. Fix the black regulator at the 7:00 pm mark and the red regulator at the 5:00 am mark. He automatically turns off and on the power supply at the set time every day.
2. Rotate the clock face clockwise (strictly prohibited from reversing), first place the regulator indicating the starting control time on the upper right side of the black indicator needle, then control the counterclockwise movement of the hexagonal cam (strict standard reverse movement) to make the clock switch outside the state before it needs to be opened or closed, and make one tooth in the hexagonal cam match the position indicated by the black indicator needle (at this time, the adjusting screw should just move the hexagonal cam to make the clock switch in the starting on/off state). When the starting control time is reached, install the 1.5V battery into the battery box, and the quartz clock will start working.

Precautions for use
1. The polarity of the 1.5V battery used in quartz clocks should not be reversed and should be replaced regularly. Typically, one high-performance No.1 battery can last for one year.
2. It is strictly prohibited to reverse the dial and hexagonal cam of the clock, otherwise it may damage the components.
3. After a long period of use, it should be readjusted to eliminate accumulated errors.
4. The installation location should avoid exposure to direct sunlight, cold, strong magnetic fields, corrosive gases, or environments with relative humidity not exceeding 85%.
5. The rated current value indicated on this product refers to resistive loads. If used for inductive loads such as high-power motors, it must be matched with AC contactors.

SDK-2/3 quartz time control switch