Abstract: A power monitor includes a power conditioning circuit that provides conditioned power to a load. The power conditioning circuit includes at least one sensor to measure a power quality characteristic, e.g., input voltage, load current, temperature, etc. A terminal device implements a diagnostic tool for the power monitor and includes a processor to obtain data indicative of the power quality characteristic over a communication link with the power monitor. The data may be retrieved in response to a trigger condition. A user interface implemented on the terminal device displays the obtained power quality characteristic as at least one temporally varying waveform.

Abstract: A hybrid switch circuit includes a hybrid switch that couples an input conductor connected to an AC power supply to an output conductor connected to a load. The hybrid switch includes a power semiconductor in parallel with an electromagnetic relay. A control circuit turns on the hybrid switch by turning on the power semiconductor at a zero-voltage crossing of the AC voltage to provide a conductive path and then closing the relay to provide a conductive bypass path that bypasses the power semiconductor. The control circuit turns off the hybrid switch by opening the relay and subsequently turning off the power semiconductor at a zero crossing of the load current. The control circuit operates in response to at least one switch control signal that indicates whether an operating fault condition exists.

Abstract: A power conditioning, distribution and management system includes a switch circuit that enables coupling of an AC power supply to a load though an overcurrent device. A control circuit switches the switch circuit from a non-conductive state to a conductive state when a supply voltage signal is between first overvoltage and undervoltage thresholds. The control circuit records an overvoltage event and maintains the switch circuit in the conductive state when the supply voltage signal exceeds a second, higher overvoltage threshold and switches the switch circuit to a nonconductive state when the supply voltage signal exceeds a third, highest overvoltage threshold. The control circuit records an undervoltage event and maintains the switch circuit in the conductive state when the supply voltage signal falls below a second, lower under-voltage threshold and switches the switch circuit to the non-conductive state when the supply voltage signal falls below a third, lowest undervoltage threshold.

Abstract: A supply voltage monitor includes a switch circuit that enables coupling of an AC power supply to a load. A control circuit switches the switch circuit from a non-conductive state to a conductive state when a supply voltage signal is between a first over-voltage threshold and a first under-voltage threshold. The control circuit records an over-voltage event and maintains the switch circuit in the conductive state when the supply voltage signal exceeds a second, higher over-voltage threshold. The control circuit switches the switch circuit to a non-conductive state when the supply voltage signal exceeds a third, highest over-voltage threshold. The control circuit records an under-voltage event and maintains the switch circuit in the conductive state when the supply voltage signal falls below a second, lower under-voltage threshold. The control circuit switches the switch circuit to the non-conductive state when the supply voltage signal falls below a third, lowest under-voltage threshold.

Abstract: A hybrid switch circuit includes a hybrid switch that couples an input conductor connected to an AC power supply to an output conductor connected to a load. The hybrid switch includes a power semiconductor in parallel with an electromagnetic relay. A control circuit turns on the hybrid switch by turning on the power semiconductor at a zero-voltage crossing of the AC voltage to provide a conductive path and then closing the relay to provide a conductive bypass path that bypasses the power semiconductor. The control circuit turns off the hybrid switch by opening the relay and subsequently turning off the power semiconductor at a zero crossing of the load current. The control circuit operates in response to a hybrid switch control signal that indicates whether an operating fault condition exists.

Abstract: A plurality of controllers, each coupled to a plurality of outlets, compare values assigned to characteristic parameters or “process variables” against at least one control value on the process variable. The values for the process variables are derived from at least one signal provided to corresponding controllers. At least one of the outlets at each controller is configured to selectively provide an electrical voltage from an input voltage in accordance with the comparison of the process variable values and the control value. Remotely accessible controls may be stored at the controllers which may be retrieved through respective network interfaces at the controllers. A remote processor may use the retrieved controls to remotely specify, such as over a communication network, the control values.

Abstract: Power data are collected from one or more power modules that control power to a connected load. The power data may include indications of source electricity measurements and of load power consumption measurements. These measurements are correlated in space or time and a set of the correlated source electricity measurements or the correlated load power measurements is selected for presentation. The selected set of measurements is presented on a presentation device such that deviations from specified values are indicated to a user.

Abstract: A roll for distributing printing liquid in a printing press is provided. The roll includes a roll core having at least a first and a second axial zone, a first liquid feed for feeding liquid to the first axial zone, a second liquid feed for feeding the liquid to the second axial zone independent of the first axial zone and a porous shell covering the first and second axial zones. A printing press, a method for providing printing liquid through a porous shell of a printing liquid supply roll to a cylinder of a printing press, an inking apparatus and a method for providing ink to an anilox roll are also provided.

Abstract: A power conditioning device includes a set of outlets through which one or more load devices are provided electricity. Each device outlet is controlled independently of the control of other device outlets. The power conditioning device includes a storage device that contains a set of controls by which the power conditioning device can be operated and programmed. The set of controls, which may be contained in a Hypertext Markup Language formatted file and retrieved by a remote device through Hypertext Transfer Protocol requests, allows such control and programming to be performed from a remote location. Additionally, the power conditioning device may be configured to log selected data and provide (such) the log, as well as selected alarms, to the remote device.

Abstract: A supply voltage monitor includes a switch circuit that enables coupling of an AC power supply to a load. A control circuit switches the switch circuit from a non-conductive state to a conductive state, and vice-versa, based upon a state of a state machine implemented by the control circuit, and further reports anomalies in process variables, such as voltage and current levels, temperature, etc., based on the state of the state machine. The transition criteria that is met to compel a transition in state is selectable by a user by way of a user interface. The transition criteria may correspond to different power levels that define a range over which the power is considered nominal and a range over which the power is considered to be an anomaly. The transition criteria additionally define what type of anomalies are reported without a change in the conductivity of the switch circuit.

Abstract: A supply voltage monitor includes a switch circuit that enables coupling of an AC power supply to a load. A control circuit switches the switch circuit from a non-conductive state to a conductive state when a supply voltage signal is between a first over-voltage threshold and a first under-voltage threshold. The control circuit records an over-voltage event and maintains the switch circuit in the conductive state when the supply voltage signal exceeds a second, higher over-voltage threshold. The control circuit switches the switch circuit to a non-conductive state when the supply voltage signal exceeds a third, highest over-voltage threshold. The control circuit records an under-voltage event and maintains the switch circuit in the conductive state when the supply voltage signal falls below a second, lower under-voltage threshold. The control circuit switches the switch circuit to the non-conductive state when the supply voltage signal falls below a third, lowest under-voltage threshold.

Abstract: Systems and methods provide power quality devices that include a communication interface to establish communications with the computer.

Abstract: Systems and methods provide power quality devices that have a dual use connector that will couple to a device being protected, such as a telephone handset, and will also provide a communication interface that a technician can access to establish communications with the power quality device.

Abstract: A hybrid switch circuit includes a hybrid switch that couples an input conductor connected to an AC power supply to an output conductor connected to a load. The hybrid switch includes a power semiconductor in parallel with an electromagnetic relay. A control circuit turns on the hybrid switch by turning on the power semiconductor at a zero-voltage crossing of the AC voltage to provide a conductive path and then closing the relay to provide a conductive bypass path that bypasses the power semiconductor. The control circuit turns off the hybrid switch by opening the relay and subsequently turning off the power semiconductor at a zero crossing of the load current. The control circuit operates in response to at least one switch control signal that indicates whether an operating fault condition exists.

Abstract: A hybrid switch circuit includes a hybrid switch that couples an input conductor connected to an AC power supply to an output conductor connected to a load. The hybrid switch includes a power semiconductor in parallel with an electromagnetic relay. A control circuit turns on the hybrid switch by turning on the power semiconductor at a zero-voltage crossing of the AC voltage to provide a conductive path and then closing the relay to provide a conductive bypass path that bypasses the power semiconductor. The control circuit turns off the hybrid switch by opening the relay and subsequently turning off the power semiconductor at a zero crossing of the load current. The control circuit operates in response to a hybrid switch control signal that indicates whether an operating fault condition exists.

Abstract: A roll for distributing printing liquid in a printing press is provided. The roll includes a roll core having at least a first and a second axial zone, a first liquid feed for feeding liquid to the first axial zone, a second liquid feed for feeding the liquid to the second axial zone independent of the first axial zone and a porous shell covering the first and second axial zones. A printing press, a method for providing printing liquid through a porous shell of a printing liquid supply roll to a cylinder of a printing press, an inking apparatus and a method for providing ink to an anilox roll are also provided.

Abstract: An ink form roller in a printing press is provided including a core, a first layer surrounding part of the core, and a second layer surrounding part of the first layer, the second layer having a durometer hardness greater than the first layer. In addition, an ink form roller in a printing press is provided including a core, and a layer surrounding the core, the layer having a hardness between about 25 Shore A durometer and about 40 Shore A durometer, the layer having an outer surface, the outer surface having a surface roughness of about 30 micro-inches or less. Methods are also provided.

Abstract: A trimmer for trimming of a book has a support for supporting the book, a trim blade for trimming an edge of the book, and a reciprocating actuator for moving the trim blade toward the book to trim the edge of the book. The trim blade has a trim blade edge having a first section and a second section, the second section being angled with respect to the first section.

Abstract: A method for controlling a chill roll system in a web printing press includes calculating, based on a web inlet temperature of a web entering a first chill roll of the chill roll system, a dew point temperature of an ink solvent vapor of ink printed on the web is calculated. The inlet coolant temperature of coolant entering the first chill roll is set to temperature value near the calculated dew point temperature. Using a heat transfer model, the flow rate of the coolant through the first chill roll needed to maintain a temperature rise of the coolant through the first chill roll below a predetermined value is determined. The method prevents post-chill marking by sufficiently cooling the web, and sets chill roll temperature profiles to avoid solvent condensation on chill roll surfaces and thereby avoid condensate marking.

Abstract: A lithographic web-fed rotary printing press (1) comprises an apparatus (8a, 8b, 8c, 8d) for diverting a wet printed web (4), e. g. in order to pass it around a downstream printing unit (2b) of the press (1). Each diverting apparatus (8a, 8b, 8c, 8d) includes a diverting roll (I 2) having a hydrophilic surface, to which water solution 14, preferably dampening solution, as it is used in dampening systems of a lithographic rotary printing press, is supplied by a spray nozzle arrangement (22), or by an applicator roller (16) which is in contact with a pan roller (20) for transferring the water solution (14) from a reservoir (18).