ATC, 304C-007-A-00-XX, 304 Series Percentage Timer 60 Sec 60 Hertz (72 Sec at 50 Hertz), 120 VAC, Standard 0 to 100% Metal Dial
Features:
- Classic Design
- Convenient, Continuous Adjustment
- 60 Sec 60 Hertz (72 Sec at 50 Hertz)
- 3/8" self cleaning silver contacts
- Rugged and trouble-free
- 120 VAC
- Standard 0 to 100% Metal Dial
Applications:
- Ideal for controlling wattage input to electrically heated equipment
- Good for controlling the ratio of on time and off time in a fixed time cycle with other types of electrical equipment
- Providing rate-of-rise set point drive control in ratio and cascade control systems
Easily the most rugged and dependable of industrial percentage timers, the ATC 304 incorporates heavy-duty contacts that are capable of switching loads as large as 4.6 KW directly.
Large Contacts
Self-cleaning silver contacts are 3/8 inch in diameter, larger than in any other make of percentage timer. They easily provide 1,000,000 operations at the full rated load of 25 A
Rugged and Trouble-Free
Every component of the 304 has been refined and improved over the years to provide dependable operation for at least 3,000,000 cycles. Its classic simplicity of design makes it virtually trouble-free.
Convenient Adjustment
Graduated in easily read 1% increments, the 304 provides Continuous Adjustment of on time between 5 and 95%. It also switches the load off continuously when the pointer is set below 3% and on continuously, when the pointer is set above 98%.
Operation
60 - Second time cycles (60 Hz) synchronous motor drives a cam which repeatedly closes the SPST load switch for a percentage of the timecycle, as set on the timer dial, and opens it for the remainder of the cycle.When the dial pointer is set below 3%, the load switch stays open for the full cycle it remains closed when the pointer is set above 98%. Series 304 timers operate continuously and do not reset on power interruption when power is restored, they resume the interrupted cycle.
Typical Applications
Ideal for controlling wattage input to electrically heated equipment, the 304 non-plug-in models can pulse loads up to 4.6 KW directly through the SPST load switch the plug-in models can switch up to 2.3 KW loads directly. The 304 can be used with other types of electrical equipment to control the ratio of on time and off time in a fixed time cycle. In many types of ratio and cascade control systems, the 304 provides rate-of-rise set point drive control special dial calibrations are available for this application.
For more information, please see 
Data Sheet
