Disclosed is an intermittent pressure switch for pneumatic valves to control pressure relief valves in oil and gas producing operations by directing the valve to open and close based on pressure parameters (pre)set by the user. This enables oil and gas wells to produce based on formation pressure buildup. The inventive switch consists of a box containing a pressure switch programmable from 0 to 5,000 psi, a 3-port solenoid valve, 24 volt battery system, solar panel, solar control charger, pressure gauge, circuit wiring, and pressure fittings.

Disclosed are an overload protection apparatus and method, and a storage medium, a compressor and an electric appliance. The apparatus includes: a first overload protection mechanism and a second overload protection mechanism, wherein the first overload protection mechanism is arranged to perform overload protection on the pressure of a compressor to be protected, and/or the second overload protection mechanism is arranged to perform overload protection on at least one of the temperature and the current of the compressor to be protected.

Disclosed are an overload protection apparatus and method, and a storage medium, a compressor and an electric appliance. The apparatus includes: a first overload protection mechanism and a second overload protection mechanism, wherein the first overload protection mechanism is arranged to perform overload protection on the pressure of a compressor to be protected, and/or the second overload protection mechanism is arranged to perform overload protection on at least one of the temperature and the current of the compressor to be protected.

Provided are a battery pack, and a transportation apparatus including the battery pack. The battery pack includes a battery module, a battery management system configured to control charging and discharging operations of the battery module, a power supply terminal arranged to supply operation power, and a switch connected between the power supply terminal and the battery management system, and configured to be turned on in response to an abnormal situation of the battery module. Accordingly, it is possible to provide a battery pack, and a transportation apparatus including the battery pack, which may start a suitable protection operation by waking up a battery management system for monitoring a state of the battery pack, and by controlling a charge/discharge operation thereof, by detecting an abnormal situation of a battery module even when the battery management system is in a sleep mode.

An insulating fluid monitoring block includes an insulating fluid channel. The insulating fluid channel is connected through a branch channel to a cutout. A sensor element is at least partly disposed in the cutout. The sensor element serves for monitoring an insulating fluid. A mounting method for an insulating fluid monitoring block is also provided.

Systems (100) and methods (2400) for operating a submersible switch positioned below a body of water's surface. The methods comprise: deflecting a semi-rigid top wall of the submersible switch's cap towards a center of the switch when hydrostatic pressure is applied thereto; directly applying a pushing force by the submersible switch's cap onto an actuator of an internal switch disposed in a body of the submersible switch; and causing an operational state change of the submersible switch in response to the pushing force being applied directly to the actuator of the internal switch.

Systems (100) and methods (2400) for operating a submersible switch positioned below a body of water's surface. The methods comprise: deflecting a semi-rigid top wall of the submersible switch's cap towards a center of the switch when hydrostatic pressure is applied thereto; directly applying a pushing force by the submersible switch's cap onto an actuator of an internal switch disposed in a body of the submersible switch; and causing an operational state change of the submersible switch in response to the pushing force being applied directly to the actuator of the internal switch.

An electrical control system may include a sensor unit with an attachment mechanism for mounting the sensor unit to a fluid pipe, a fluid flow sensor, and a signal generator configured to generate a signal indicating at least one of whether the flow sensor detects a fluid flow in the fluid pipe or whether the flow sensor detects no fluid flow in the fluid pipe. The system may also include a control unit having one or more of an electrical plug, an electrical socket, an interruptible circuit between the electrical plug and the electrical socket, a receiving device configured to receive the signal from the sensor unit, and a processor configured to interrupt the circuit between the electrical plug and the electrical socket based on at least one of receipt of the signal or interruption of the signal.

An electrical control system may include a sensor unit with an attachment mechanism for mounting the sensor unit to a fluid pipe, a fluid flow sensor, and a signal generator configured to generate a signal indicating at least one of whether the flow sensor detects a fluid flow in the fluid pipe or whether the flow sensor detects no fluid flow in the fluid pipe. The system may also include a control unit having one or more of an electrical plug, an electrical socket, an interruptible circuit between the electrical plug and the electrical socket, a receiving device configured to receive the signal from the sensor unit, and a processor configured to interrupt the circuit between the electrical plug and the electrical socket based on at least one of receipt of the signal or interruption of the signal.

Provided is a device for measuring a micro flow rate. The device includes a container having an internal space for containing a fluid flowing therein and an inflow line and an outflow line formed in communication with the internal space, a fluid level gauge configured to sense whether a level of a fluid collected in the container rises to a predetermined height to conduct or block flow of an electric current, a control valve disposed in the outflow line and configured to open or close the outflow line according to a state in which the control valve is electrically connected to or disconnected from the fluid level gauge such that the outflow line is opened or closed according to a change in the fluid level; and a control unit configured to calculate a micro flow rate of the fluid collected in the container using information acquired from at least one of the fluid level gauge and the control valve.