摘要:
For use where there is a relay (42) controlling an AC power circuit to a load (20), such as a cooker heater, an optical sensor (64) observes arcing at the relay contacts (14). A control circuit (54) controls the time of subsequent actuation or deactuation of the relay with respect to the alternating current power circuit so that the relay contacts open or close substantially at a zero crossing point of the AC current, so as to minimise relay contact arcing.
摘要:
An apparatus, a method and a flat (e.g. 2a) for pasteurizing a plurality of layers of in-shell eggs without substantially impairing the functionality of the in-shell eggs. The apparatus includes a fluid bath (120), heat exchangers (52, 53, 54, 55a, and 55), a means for vertically pertubating the entire surface of in-shell eggs loosely held in a plurality of flats (21b and 29a) forming at least one stack thereof (10, 20).
摘要:
A relay (10) has contacts (44,46) to control delivery of AC power to a load, and includes a sensor (64) mounted for observing any arc at the relay contacts, and a control circuit (70) which controls the time of subsequent actuation or deactuation of the relay with respect to the AC power supply so that the relay contracts open or close substantially at a zero crossing point of the AC current, so as to minimize relay contact arcing. The sensor and control circuit (70) are mounted within the relay housing (32,34) to make a simple plug-in unit.
摘要:
The relay has contacts (14,16) to control delivery of AC power to a load (20), and includes a sensor (46) mounted for detecting any arc at the relay contacts, and a control circuit (50) which controls the time of subsequent actuation or deactuation of the relay with respect to the AC power supply so that the relay contacts open or close substantially at a zero crossing point of the AC current, so as to minimise relay contact arcing, per EP-AZ-0 349 273. The sensor (46) is fixedly mounted by a bracket (48) on the relay base (43), so that its face is reliably fixed in position close to the contacts. The sensor may comprise an optical sensor (46), or the input end (54) of an optical fibre (58; Figure 3), or a field effect sensor (62; Figure 4), or may be in (96; Figure 6) or beneath (65; Figure 5) the relay base.
摘要:
Proteinaceous food product is heated by immersing the product in a liquid bath and maintaining the bath at a controlled temperature within a range that treats the proteinaceous food product without substantial loss of functionality.
摘要:
A relay (10) has contacts (44,46) to control delivery of AC power to a load, and includes a sensor (64) mounted for observing any arc at the relay contacts, and a control circuit (70) which controls the time of subsequent actuation or deactuation of the relay with respect to the AC power supply so that the relay contracts open or close substantially at a zero crossing point of the AC current, so as to minimize relay contact arcing. The sensor and control circuit (70) are mounted within the relay housing (32,34) to make a simple plug-in unit.
摘要:
An apparatus, a method and a flat (e.g. 2a) for pasteurizing a plurality of layers of in-shell eggs without substantially impairing the functionality of the in-shell eggs. The apparatus includes a fluid bath (120), heat exchangers (52, 53, 54, 55a, and 55), a means for vertically pertubating the entire surface of in-shell eggs loosely held in a plurality of flats (21b and 29a) forming at least one stack thereof (10, 20).
摘要:
The relay has contacts (14,16) to control delivery of AC power to a load (20), and includes a sensor (46) mounted for detecting any arc at the relay contacts, and a control circuit (50) which controls the time of subsequent actuation or deactuation of the relay with respect to the AC power supply so that the relay contacts open or close substantially at a zero crossing point of the AC current, so as to minimise relay contact arcing, per EP-AZ-0 349 273. The sensor (46) is fixedly mounted by a bracket (48) on the relay base (43), so that its face is reliably fixed in position close to the contacts. The sensor may comprise an optical sensor (46), or the input end (54) of an optical fibre (58; Figure 3), or a field effect sensor (62; Figure 4), or may be in (96; Figure 6) or beneath (65; Figure 5) the relay base.