KL26x2, KL2634 - service life
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Observe the maximum values! It is the maximum values that are to be expected that are critical to selection of the right terminal rather than the technical figures for normal operation! |
Fig.26: KL26x2, KL2634 - characteristic curves (does not apply to KL26x2-0010)For the -0010 variants applies
The relays internally of these terminals would be switched near to the zero voltage crossing of an AC supply. Hereby the lifetime of the outputs is no longer dependent by the absolute lifetime of the relay. The result of an exemplary long term test with the following boundary conditions represent that:
- Each channel of a terminal EL2622-0010 (or KL2622-0010 respectively) switches cyclic one time per second a beforehand complete discharged capacitive load of approximately 40 µF (without any additional resistor in series) to 230 VAC, whereof a permanent current of approx. 4 A is resulting.
- After abortion of the test over more than 200,000 switching cycles per channel the expected lifetime of the terminal outputs are above them of the relays.
- Under the same test conditions but without connection of the neutral wire that disables the operation of the zero voltage detection, the relay was out of order after less than 10 switching cycles.