What are the technical requirements for using relays?:
1. Rated voltage, setting range, power consumption and return factor of relay.
2, operation value limit error: under the reference condition, the relay each setting value limit error is not more than + 6%.
3, action value consistency: in the benchmark conditions, the consistency of the relay action value is not more than 6% set value.
4. Variation caused by temperature variation: the variation of the operating voltage is not more than + 5% at the nominal limit temperature.
5, action time: 1.1 times the actual action value, overvoltage relay operation time is not more than 0.12s (about DY-32 ~ 34/60C is not greater than 0.15s); in 2 times the actual action value, the action time is not more than 0.04s (about DY-32 ~ 34/60C is not greater than 0.06s); low voltage relay at 0.5 times the actual operation value when the operating time is less than 0.15s.
6 、 thermal performance: when the ambient temperature is 40 degrees, the relay can work under the long-term allowable voltage (see Table 1), without insulation and other components damage, and its coil temperature rise is not more than 65 degrees centigrade.
7, overload ability: when the coil is parallel relay, the minimum setting value, the voltage evenly from 1.05 times to 2.2 times the tuning voltage setting voltage, jitter contact should not be unable to work relay.
8, insulation performance
A, insulation resistance is not less than 300M.
B, dielectric strength
Each conducting circuit of the relay is connected together with the exposed non charged metal part and the outer shell, and can withstand the 2kV (effective value) and the alternating voltage of the 50Hz, and the 1min test is conducted without the insulation breakdown or flashover phenomenon.
9, action reliability
A the movable system during relay action should not be stalled in the middle position at the action voltage or return voltage.
B, when the coil is suddenly applied 1. When 75 times the set voltage excitation, the dynamic contact should be closed without jitter.
C, when there is no external impact and vibration, the relay setting value setting in the middle plate (or greater than the central setting), overvoltage relay excitation was 0.6 times of tuning voltage relay, the break contacts should be reliably closed, contact should be reliably disconnected; low voltage relay the incentive amount not less than 1.5 times the tuning voltage of the relay, the break contacts should be reliably disconnected in the tuning voltage of 0.6 times (or lower), relay break contacts should be reliably closed.
10. Contact performance
A, contact capacity: sense in the DC loop (=5ms), U = 250V, I = 2A, 50W; (COS =0.4) in the AC circuit, U = 250V, I = 2A, 250VA.
B, electric life: 5 * 10 times.
C, mechanical life is 10 times.