The lead-out end of the unsealed or sealed China 24vdc relay exposes the insulator for a long time due to dust, water vapor pollution and other factors, resulting in a decrease in its insulation strength, which is likely to cause insulation penetration failure, so the following points should be paid attention to:

1. Sufficient creepage distance: generally not less than 3mm;

2. Sufficient insulation strength: the middle of the electric conductor without electrical equipment connection exceeds AC2000V, and the middle of a group of contacts exceeds AC1000V.

3. The ability to withstand climate stress for a long time: the coil is free from mildew and breakage, and the insulation resistance level is stable and reliable for a long time.

4. Hazards of contact output (replacing the power supply circuit) load.

The key is the contact load characteristics, such as: lamp load, motor load, inductance, china 24vdc relay electromagnetic coil, inductive load load, etc.; contact load value (open circuit voltage value, cable digital TV current value), such as: low Electric frequency load, dry power circuit load, small current load, large current load, etc.