Voltage relay dy-28c

brand ：JOSEF Joseph

name ： Voltage relay

model ：DY-29

Voltage setting range ：12~400V

Power consumption ：≤20W

Contact capacity ：250V2A

Action time ： Over voltage ≤0.12S/ Low voltage ≤0.15S

Series voltage relay

DY-32 Voltage relay ;

DY-36 Voltage relay ;

DY-33 Voltage relay ;

DY-37 Voltage relay ;

DY-34 Voltage relay ;

DY-38 Voltage relay ;

DY-31 Voltage relay ;

DY-35 Voltage relay ;

DY-32/60C Voltage relay ;

DY-34/60C Voltage relay ;

One . DY-38 Purpose of voltage relay

Voltage relay DY-28C, Used in relay protection circuit , As an action element of overvoltage protection or low-voltage locking .

working principle

1. The relay is electromagnetic , Instantaneous action , The magnetic system has two coils , The coil outlet is connected to the base terminal , Users can connect in series or in parallel as needed , Therefore, the setting range of the relay can be doubled .

2. The scale value and rated value of the relay are sufficient when the coils are connected in parallel ( With V In units of ). Turn the pointer on the dial 、 To change the reaction torque of hairspring , Thus, the action value of the relay can be changed .

3. Relay action ： For overvoltage relays , When the voltage rises to or exceeds the setting value , The relay will act , The dynamic contact is closed , The dynamic breaking contact is disconnected . When the voltage drops to 0.8 Times the setting value , The relay returns , The dynamic contact is disconnected , The dynamic breaking contact is closed , For low voltage relays , When the voltage drops to the set voltage , The relay will act , The dynamic contact is disconnected , The dynamic breaking contact is closed

Two . Technical parameters

notes ：DY-32 / 60C、DY-34 / 60C The specification is long-term thermal stability （ With internal series capacitor ） Voltage relay .

3. Relay scale limit error ： No more than 6%.

4. Variation of action value ： No more than 6%.

5. about DY-31、32、33、34 The return coefficient of voltage relay shall not be less than 0.8;DY-35、36、37、38 The return coefficient of low voltage relay shall not be greater than 1.25.

6. Action time

6.1 For overvoltage relays

stay 1.1 Times the action value , The action time shall not be greater than 0.12s; stay 2 The action time of double action value shall not be greater than 0.04s.

6.2 For low voltage relays

When the working voltage of the relay is 0.5 When times the set voltage , The action time shall not be greater than 0.15s.

7. Overvoltage capability ： When the coils are connected in parallel , At the small setting value , Increase the voltage evenly from zero to 1.05～2.2 Times the setting voltage , In this context , The relay should not have vibration that makes the dynamic contact inoperative . After this test , The relay shall still meet the requirements of technical conditions .

8. Over voltage ： When the relay is applied 1.75 When times the setting value or higher, the dynamic contact of the relay shall be closed without jitter .

9. When there is no external collision and vibration . Settings of overvoltage relay (* Except points ) The working voltage at the position is 0.6 Times the setting value , Its dynamic breaking contact shall reliably close the circuit .

10. The low voltage relay operates at 0.6 Times the set voltage or lower , Its dynamic breaking contact shall be closed without shaking .

11. When there is no external collision and vibration , The working voltage at each setting position of the low voltage relay shall not be lower than 1.5 When times the set voltage , Its dynamic contact should be reliable Ground closed circuit .

12. Under action voltage and return voltage ; The movable system of the relay should not stagnate in the middle position .

13. When the relative humidity of the surrounding air is not greater than 85％, The circuit of the relay is opposite to the shell ( The non-conductive metal part on the shell ) Insulation resistance , use 500V The megger measurement should not be less than 300MΩ.

14. The conductive part of the relay is opposite to the housing ( The non-conductive metal part on the shell ) Insulation of , Intolerance 50Hz AC voltage 2kV after 1min Test of .

15. Contact breaking capacity ： When the voltage is not greater than 250V And the current is not greater than 2A when , Breaking power of contact , In DC circuit with inductive load ( The time constant is not greater than 5×10-3s) In Chinese, it means 50W, In AC circuit 250VA.

16. Power consumption ： At the small setting value , The power consumed by the coil of the relay does not exceed 20VA.

17. When the surrounding medium temperature is +40℃ when , The relay is in table 2 And table 3 Long term allowable current shown , Long term operation under voltage , There will be no damage to insulation and other electrical components , The temperature rise of the coil is not greater than 65℃.

18. life ： Electrical life of relay 500 Time , The mechanical life is 5000 Time .

Use and maintenance

1. Before using the relay , The shell needs to be removed , Unplug the machine , Check for damage during transportation ： If the moving piece touches the magnetic plate , The coils of hairspring collide , Friction on the moving blade shaft, etc , So , Set the pointer of the relay to * On the set point , Turn the movable system towards the magnetic plate by hand , Then let go , The movable system should be turned back to the original balance position until it stops , Then make necessary adjustments and settings .

2. When the relay is readjusted , Must ensure .

2.1 The axial activity of the movable system is 0.15～0.3mm Between .

2.2 The air gap between the moving plate and the magnetic pole , The relay shall be guaranteed to work under any specified conditions , The moving piece and the magnetic plate shall not collide .

2.3 Relay with dynamic make contact and dynamic break contact , During the action , The bridge contact shall not contact the dynamic closing static contact and the dynamic breaking static contact at the same time .

2.4 When the pointer is set by * When the scale value turns to the final scale value , The coils of hairspring shall not touch .

2.5 When the relay acts , The bridge contact should slide on the center line of the static contact ( tolerance ±lmm), dynamic 、 The total air gap of static contact shall not be less than 2mm.

2.6 The distance between the static contact and the limiting plate shall not be greater than 0.3mm.

2.7 When adjusting the action value of the relay , The adjustment of the small setting value is mainly to change the size of the hairspring reaction , Adjustment of large setting value , It mainly changes the air gap between the moving plate and the magnetic plate .

2.8 Do not lubricate the relay shaft and bearings .

2.9 It is not allowed to clean the contact with sandpaper or other rough materials , The contact should be cleaned with a sharp blade or a clean fine grinding stone , Then use clean 、 Wipe clean with soft cloth , Avoid touching the contacts with your fingers .

3、 ... and . Wiring diagram

Ordering instructions ：

Voltage relay DY-28C

The relay model and specification must be indicated when ordering 、 Power supply mode and setting range of auxiliary power supply 、 Structural form code 、 Wiring mode before or after the board 、 Quantity and other requirements .

Specializing in the production of relays 、 Power meter 、 Microcomputer integrated protection device 、 Motor protector 、 Power automation integrated control system and other products . About microcomputer protection device 、 Relay 、 Power meter 、 Price of products such as power automation system 、 Technical parameters …

A relay that operates when the voltage in the circuit reaches a predetermined value . Its structure is basically the same as that of current relay , It's just that the number of turns of the electromagnet coil is a lot , And it should be connected in parallel with the power supply . It is widely used in loss of pressure （ The voltage is zero ） And undervoltage （ Low voltage ） Under protection . The so-called voltage loss and undervoltage protection is when the power supply voltage is reduced too much or temporarily cut off for some reason , The motor is automatically disconnected from the power supply ; When the power supply voltage recovers , If you don't press the start button again , Then the motor cannot start by itself . If it is not controlled by relay , Instead, the knife switch is directly used for manual control , Because the switch was not opened in time during the power failure , When the power supply voltage recovers , The motor starts automatically , May cause accidents . In addition, there is overvoltage relay , It is when the circuit voltage exceeds a certain value , A relay that cuts off the power supply due to electromagnet suction , It is used for overvoltage protection （ Such as protective silicon tube and silicon controlled components ）.

Shanghai Joseph relay business department