LightHAWK®2 Wall Switch Occupancy Sensors
... the sensor’s sensitivity and timer settings to optimize performance based on occupancy patterns. The sensor constantly learns and adjusts appropriately. If the learned settings need to be reset (e.g. when relocating sensor to another area), toggle the switch ON then OFF. The adaptive timer is reset ...
... the sensor’s sensitivity and timer settings to optimize performance based on occupancy patterns. The sensor constantly learns and adjusts appropriately. If the learned settings need to be reset (e.g. when relocating sensor to another area), toggle the switch ON then OFF. The adaptive timer is reset ...
Transistor Circuits
... limiting resistor R3. The LED's are arranged so that when the polarity across the circuit is one way only one LED will light and when the polarity reverses the other LED will light, therefore when no transistor is connected to the tester the LED's will alternately flash. The IC2 outputs are also con ...
... limiting resistor R3. The LED's are arranged so that when the polarity across the circuit is one way only one LED will light and when the polarity reverses the other LED will light, therefore when no transistor is connected to the tester the LED's will alternately flash. The IC2 outputs are also con ...
Generator Third-Harmonic Stator Ground Fault Detection Element
... Loss of connection to the relaying voltages will have an impact on the 64G element to the extent that the voltages lost are used by the element. Loss of the voltage connection to the generator neutral voltage impacts any 64G implementation, but should only occur if that voltage test switch is opened ...
... Loss of connection to the relaying voltages will have an impact on the 64G element to the extent that the voltages lost are used by the element. Loss of the voltage connection to the generator neutral voltage impacts any 64G implementation, but should only occur if that voltage test switch is opened ...
Tesla Coil: History and Didactic Construction - PRP
... The Tesla coil was built with attention to the inventor’s original schematics, but in a reduced scale. The concept of reuse was also used, employing simple materials for the concept and creation of the coil. A Tesla coil is a simple circuit, with a transformer that generates high-voltage, low-curren ...
... The Tesla coil was built with attention to the inventor’s original schematics, but in a reduced scale. The concept of reuse was also used, employing simple materials for the concept and creation of the coil. A Tesla coil is a simple circuit, with a transformer that generates high-voltage, low-curren ...
SEL-451-5 Data Sheet
... conditions. The logic checks for a sudden change in positive-sequence voltage without a corresponding change in positive- or zero-sequence current. Tests and field experience show that this principle is very secure and is faster than the tripping elements. ...
... conditions. The logic checks for a sudden change in positive-sequence voltage without a corresponding change in positive- or zero-sequence current. Tests and field experience show that this principle is very secure and is faster than the tripping elements. ...
section 262913 - enclosed controllers
... 95% Construction Document Submission Phase a. b. c. d. e. f. ...
... 95% Construction Document Submission Phase a. b. c. d. e. f. ...
Relay
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called ""protective relays"".