A device for protecting, controlling, and monitoring electrical medium range switchgear comprising use of a Rogowski coil embedded in the bottle of a switchgear and surrounding the Mains flow of voltage and current, a capacitive or similar voltage divider, also surrounding the Mains and extending around the bottle, and providing analog signals from those devices to an integrated circuit for conversion to digital signals, and then transmitting as output the digital signals to a data accumulator where the same are optionally time stamped and compared to one another, to a standard or to themselves at a different time.

Resistance values for a first time for respective areas of a plurality of electrical connections are generated. Respective normalized resistance values are generated from the resistance values. Respective temperature rise values for a second time for respective ones of the areas of the electrical connections are generated. An average temperature value is generated from the temperature rise values. Respective normalized temperature rise values for the generated temperature rise values are generated based on the average temperature values. An abnormal condition of at least one of the connections is detected responsive to the normalized temperature rise values and the normalized resistance values.

An electrical system includes a voltage bus, battery pack, power inverter module (PIM), electric machine, first contactor, and controller. The PIM is connected to the battery pack and has a capacitor, voltage sensor, and semiconductor switches. The electric machine having phase legs with a corresponding phase winding and resistive path. The first contactor connects the PIM to a positive rail of the bus. The controller opens the first contactor in response to a power-off event, commands a discharge of the capacitor through the resistive paths, diagnoses a state of health (SOH) of the first contactor using a first threshold decay rate of the capacitor output voltage upon opening the first contactor, and executes a control action with respect to the electrical system using the diagnosed SOH. The three possible SOH are unhealthy/hard-welded contactor, unhealthy/soft-welded contactor, and healthy/normally-functioning contactor condition. A vehicle and method are also disclosed.

An electrical system includes a voltage bus, battery pack, power inverter module (PIM), electric machine, first contactor, and controller. The PIM is connected to the battery pack and has a capacitor, voltage sensor, and semiconductor switches. The electric machine having phase legs with a corresponding phase winding and resistive path. The first contactor connects the PIM to a positive rail of the bus. The controller opens the first contactor in response to a power-off event, commands a discharge of the capacitor through the resistive paths, diagnoses a state of health (SOH) of the first contactor using a first threshold decay rate of the capacitor output voltage upon opening the first contactor, and executes a control action with respect to the electrical system using the diagnosed SOH. The three possible SOH are unhealthy/hard-welded contactor, unhealthy/soft-welded contactor, and healthy/normally-functioning contactor condition. A vehicle and method are also disclosed.

A method for protecting, controlling, and monitoring electrical medium range switchgear comprising use of a Rogowski coil embedded in the outside of a cylinder or bottle of a switchgear and surrounding the Mains providing voltage and current and a capacitive or similar voltage divider, also surrounding the Mains and extending around the cylinder or bottle, and providing analog signals from those devices to an integrated circuit for conversion to digital signals, and then transmitting as output the digital signals to a data accumulator where the same are optionally time stamped and compared to one another, to a standard or to themselves at a different time.

The modification method for the gas density relay, the gas density relay with the online self-check function and the check method thereof provided by this application are used for high-voltage and medium-voltage electrical equipment, including a gas density relay body, a gas density detection sensor, a temperature regulating mechanism, an online check contact signal sampling unit and an intelligent control unit. Regulate temperature rise and fall of the temperature compensation element of the gas density relay body through the temperature regulating mechanism, which leads to a contact action of the gas density relay body, the contact action is transferred to the intelligent control unit through the online check contact signal sampling unit, and the intelligent control unit detects the operating value and/or return value of the contact signal of the gas density relay body based on the density value at the time of contact action. The gas density relay check can be completed without maintainer at the site, so as to realize free maintenance, greatly improve the reliability of power grid, increase work efficiency and reduce the cost.

A method for protecting, controlling, and monitoring electrical medium range switchgear comprising use of a Rogowski coil embedded in the outside of a cylinder or bottle of a switchgear and surrounding the Mains providing voltage and current and a capacitive or similar voltage divider, also surrounding the Mains and extending around the cylinder or bottle, and providing analog signals from those devices to an integrated circuit for conversion to digital signals, and then transmitting as output the digital signals to a data accumulator where the same are optionally time stamped and compared to one another, to a standard or to themselves at a different time.

A monitoring latch assembly structured to monitor circuit breaker assembly operating mechanism component characteristics is provided. The monitoring latch assembly includes a latch member and a sensor assembly. The latch member includes a body. The latch member body defines a pocket. The sensor assembly is disposed in the latch member body pocket.

A device for protecting, controlling, and monitoring electrical medium range switchgear or other electrical devices comprising use of a Rogowski coil embedded in the bottle of a switchgear and surrounding the Mains flow of current carrying voltage, a capacitive or similar voltage-like divider, also surrounding the Mains and extending around the bottle, and providing analog signals from those devices to an integrated circuit for conversion to digital signals after possible adjustment by look up tables stored on the integrated circuit, and then transmitting as output the digital signals to a data accumulator where the same are optionally time stamped and compared to one another, to a standard or to themselves at a different time.

A device for protecting, controlling, and monitoring electrical medium range switchgear or other electrical devices comprising use of a Rogowski coil embedded in the bottle of a switchgear and surrounding the Mains flow of current carrying voltage, a capacitive or similar voltage-like divider, also surrounding the Mains and extending around the bottle, and providing analog signals from those devices to an integrated circuit for conversion to digital signals after possible adjustment by look up tables stored on the integrated circuit, and then transmitting as output the digital signals to a data accumulator where the same are optionally time stamped and compared to one another, to a standard or to themselves at a different time.