4.Load, Electrical life
1.General
2.Inductive load
3.Lamp load
4.Electric- discharge lamp load
5.LED lamp load
6.Other lamp load
7.Motor load
8.Capacitor load
9.Resistance load
10.Small electric current load
11.Load polarity
12.Voltage drop of power supply
2
Contact performance is significantly influenced by voltage and current values applied to the contacts (in particular, the voltage and current waveforms at the time of application and release), the type of load, frequency of switching, ambient atmosphere, contact switching speed, and of bounce, which lead the various other damages such as unsuitable operation contact transfer, welding, abnormal wear, increase in contact resistance. Therefore, please confirm that in actual use conditions such as actual circuit and actual load or contact our company.
In the case of switching on and off with inductive loads such as coil, magnet crutch, and solenoid, the arc at switching can cause a severe damage on contacts and greatly shortening of life. In addition, in the case of switching at a high frequency, a
If the current in the inductive load is relatively small, the arc discharge decomposes organic matter contained in the air and causes black deposits (oxides, carbides) to develop on the contacts. This may result in contact failure. So, please contact our company to use it.
Large inrush current enhancing contact welding will be impressed. Its current value is greatly affected by wiring resistance, switching frequency and ambient temperature. The load current characteristics in actual circuit and actual use condition must be examined and sufficient margin of safety must be provided in selection of a relay.
It is dangerous to use a lamp load whose nominal current is small even a large nominal current has been tested beforehand.
Please contact us when switching at nominal current with a small lamp load (40W or less), because continuous ON failure may occur due to locking caused by
Its load current tends to cause contact welding easily because its inrush current is larger than that of the regular lamp load. The load current characteristics in actual circuit and actual use condition must be examined and sufficient margin of safety must be provided in selection of a relay.
It is necessary to check the contact reliability because the load current of the LED load is very small. Please contact us before use.
Please contact us before use of new structured lamp except for halogen,
When using of NC contact side of 1C contact for the motor brake, mechanical life might be affected by the brake current. Therefore, verify in actual use conditions with actual circuit.
Note that larger inductivity of motor may cause contact damage and transfer even the motor load current is same.
Note that its load current tends to cause contact welding and contact transfer easily because its inrush current is generally large which has a small break current and a short time period to reach an inrush peak value.
Also, inrush current value is influenced by wiring resistance. Therefore, the inrush current in actual circuit must be examined and sufficient margin of safety must be provided in selection of a relay.
This load causes
If the switching current is small (2A or less), contact reliability decreases since the contact surface is not cleaned by switching arc. So, please contact us for use.
Electrical life may be affected by load polarity
Under a circuit which inrush current is applied to such as lamps and capacitors, the moment the contact is closed, voltage drop to the coil, return of relay, or chattering may occur. Note that it may remarkably reduce the electrical life.
Load
