Abstract: A shelter system is shown and described. A hub for a shelter system is shown and described. A frame for a shelter system is shown and described. In one embodiment, the shelter system includes a frame and cover. The shelter may include a hub system. The frame may be collapsible. The cover is configured to fit with the frame. The hub may include a receiver slot, a receiver sleeve and an attachment projection. The result is a shelter system with reduced set up time, effort and requirements and improved strength and ease of use. The inventions may also be considered a shelter kit and/or a shelter and hub method.

Abstract: A partial discharge detection board includes a voltage divider configured to attenuate a voltage of a reflected signal. A buffer is connected to the voltage divider. The buffer attenuates frequencies of the reflected signal that are greater than an upper cutoff frequency. An analog-to-digital converter is connected to the buffer. The analog-to-digital converter receives portions of the reflected signal up to the upper cutoff frequency, and the analog-to-digital converter converts the reflected signal from an analog domain to a digital domain. A filter is connected to the analog-to-digital converter. The filter attenuates frequencies of the reflected signal that are less than a lower cutoff frequency. A comparator is connected to the filter. The comparator compares the voltage of the reflected signal to a reference voltage. A counter is connected to the comparator. The counter increments when the voltage of the reflected signal is greater than the reference voltage.

Abstract: The disclosure herein relates to a partial discharge detection board comprising a high voltage resistor divider. The high voltage resistor divider can reduce a voltage peak of an impulse surge generated by a surge board. The high voltage resistor divider can also include a high side with a first resistance and a low side with a second resistance.

Abstract: The disclosure herein relates to a partial discharge detection board comprising a high voltage resistor divider. The high voltage resistor divider can reduce a voltage peak of an impulse surge generated by a surge board. The high voltage resistor divider can also include a high side with a first resistance and a low side with a second resistance.

Abstract: A partial discharge detection board includes a voltage divider configured to attenuate a voltage of a reflected signal. A buffer is connected to the voltage divider. The buffer attenuates frequencies of the reflected signal that are greater than an upper cutoff frequency. An analog-to-digital converter is connected to the buffer. The analog-to-digital converter receives portions of the reflected signal up to the upper cutoff frequency, and the analog-to-digital converter converts the reflected signal from an analog domain to a digital domain. A filter is connected to the analog-to-digital converter. The filter attenuates frequencies of the reflected signal that are less than a lower cutoff frequency. A comparator is connected to the filter. The comparator compares the voltage of the reflected signal to a reference voltage. A counter is connected to the comparator. The counter increments when the voltage of the reflected signal is greater than the reference voltage.

Abstract: The disclosure herein relates to a field-programmable gate array for detecting and normalizing partial discharges in a digital signal. The field-programmable gate array includes a filter that receives the digital signal and isolates high frequency information from the digital signal. The field-programmable gate array then normalizes the high frequency information by a compensation value to produce a normalized signal. Further, a comparator of the field-programmable gate array can determine whether the normalized signal exceeds a threshold input. In turn, a counter of the field-programmable gate array increments a counter value in response to each determination that the high frequency information exceeds the threshold input.