SU391625A1 - DEVICE FOR CONTROL OF MULTI-TIME CONTROL COMMUTATION RELAY - Google Patents

Description

one

The proposed device can be used in the electronic industry, in particular in enterprises engaged in the manufacture and use of relays.

Devices are known for monitoring the switching timing of relay contacts, which contain a source of sawtooth applied to the relay coil, switches, a power supply of a contact circuit connected to test contacts, key circuits, and a source of control pulse.

To automate and increase the accuracy of control in the proposed device, test contacts are connected to a source of control pulse through a series circuit consisting of key circuits and switches, with successive circuits, the number of which is equal to the number of contacts being studied, are interconnected in parallel.

The drawing shows a block diagram of the proposed device.

The device consists of a source of sawtooth voltage;, test relay 2 with any number of contacts, power supply of the contact circuit 3, key circuits 4, switches 5, control pulse source 6, threshold device 7.

When a linearly increasing voltage is applied to the winding of the test relay 2, the relay measles is attracted to the electromagnet with a slowdown. If there is a difference in the time of opening (closing) of the relay contacts, one of the contacts opens (closes) first, and some last. The first contact will turn on its key circuit 4, which will command the corresponding switch 5 at the beginning of the supply of the control pulse. The last contact will include its key scheme, which will give the command to the appropriate

(The switch at the end of the control pulse supply. The opening (closing) of the intermediate (between the first and last) contacts does not affect the duration of the control pulse, which is achieved by parallel switching of the switches.

Thus, the duration of the control pulse is proportional to the maximum switching time difference of the relay contacts.

The control pulse arrives at the threshold device 7 with an adjustable trigger threshold depending on the duration of the control pulse. At different switching times of contacts above the norm, the threshold

device 7 will give a signal, below normal - the threshold device does not work.

Subject invention

A device for monitoring the switching switching time of the relay contacts, containing a source of sawtooth voltage applied to the relay coil, switches, contact circuit power source connected to the test contacts, key circuits and control pulse source, in order to automate and improve accuracy controls experienced

the contacts are connected to the source of the control pulse through a series circuit consisting of key circuits and switches, and the successive circuits, the number of which is equal to the number of the contacts being studied, are connected in parallel to each other.