Relay coordination

Load schedule, power factor correction scheme, relay coordination study and diagram. 

High-voltage contactor-type motor controls depend on power fuses for short-circuit protection. The fuses are coordinated with the overload relays to protect the motor circuit over the full range of fault conditions from overload conditions to solid maximum-current short circmts. 

Coordination of fuses with an overcurrent relay or any other overcurrcnt protective device The selection of the fuses should be such that ... 

It is necessary to coordinate the HRC fuses with the overcurrent relay to ensure that during a fault the relay is capable of withstanding the let-through energy of the fuses without damage (Figures 12.11 and 12.15). 

The dominant protection scheme for generators and motors is the differential relay. Access to all enti y points of the protected zone is usually readily available, no coordination with the protection of other... 

It has been our goal for some time to run photochemical energy storage reactions without relay molecules or separate catalysts. We have concentrated on the photochemistry of polynuclear metal complexes in homogeneous solutions, because we believe it should be possible to facilitate multielectron transfer processes at the available coordination sites of such cluster species. 

In order to destabilize the likely unproductive 6-membered chelate structure of type K (Scheme 17) that might be formed if the catalyst reacts with the 4-pen-tenoate entity, the cyclization was run in the presence of a Lewis acid which competes with the evolving carbene for the Lewis basic ester group. Such an additive has to be compatible with the RCM catalyst, should provoke a minimum of acid-catalyzed side reactions, and must undergo a kinetically labile coordination with the relay substituent. Ti(OiPr)4 was found to meet these stringent requirements... 

Some of the materials highlighted in this review offer novel redox-active cavities, which are candidates for studies on chemistry within cavities, especially processes which involve molecular recognition by donor-acceptor ii-Jt interactions, or by electron transfer mechanisms, e.g. coordination of a lone pair to a metal center, or formation of radical cation/radical anion pairs by charge transfer. The attachment of redox-active dendrimers to electrode surfaces (by chemical bonding, physical deposition, or screen printing) to form modified electrodes should provide interesting novel electron relay systems. 

Figure 2.2 Fear elicits both physical and emotional changes that are coordinated by the amygdala. When a person sees a fear-inducing stimulus (the spider), the image reaches the thalamus, which is relayed to the cortex and hippocampus and projected to the lateral nucleus of the am dala. Once the information reaches the amygdala s central nucleus, the thalamus, hippocampus, and cortex each produce a different fear response.

Dworschack and Plapp presented a mechanism based on this proton relay system and this is shown in Scheme The alcohol or carbonyl groups are bonded to the zinc, as is the water molecule, giving a five-coordinate zinc. 

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