Appendix part3

Time delay contacts

The direction of the arrow indicates the switch operation, in which the contact action is delayed (time delay closing and opening contacts).

The contact in Fig. D-26 is open and will close after the timer is ener- gized and the time that is set passes.

The contact in Fig. D-27 is Normally Open. It will close when the timer is energized and will open after the time that is set passes.

The contact in Fig. D-28 is Normally Closed and will open after the timer is energized and the time that is set passes.

The contact in Fig. D-29 is Normally Closed. It will open when the timer is energized and will close after the time that is set passes.

The contacts in Fig. D-30 are Normally Open and will close one at a time from left to right. Each contact will have a different time delay setting.

Pilot light designators

These are used to show the color or type of the pilot light.

Shown in Fig. D-38:

Line 1 The control relay contacts CR1 and CR2 must be closed, and the button not pushed. Under these conditions the green pilot light will light.

Line 2 If the button is pressed, the contact will close and the pilot will light.

To indicate the type of meter or instrument (see Fig. D-39), place the letter(s) from the list below in the symbol. For other functions, look for a note in the notes section.

Meter designators