“Use of FPGA`s in critical space flight applications
... mechanisms. Two initiators fire to open the cryostat secondary vent, while wax actuators are used to open the primary vent hardware. A detailed study was made of two types of firing circuitry that could accomplish the task. Energy storage was evaluated (slow-charged capacitor banks to reduce battery ...
... mechanisms. Two initiators fire to open the cryostat secondary vent, while wax actuators are used to open the primary vent hardware. A detailed study was made of two types of firing circuitry that could accomplish the task. Energy storage was evaluated (slow-charged capacitor banks to reduce battery ...
MV Circuit Breaker Switchgear 5 kV-15 kV
... charge from the windings before allowing operator access to the VTs. ...
... charge from the windings before allowing operator access to the VTs. ...
Operating instructions fpr OSRAM DALI Professional Controller
... If the EVGs are still supplied with voltage from another power supply line, these call up – consequent to the lacking DALI communication – until voltage restoration reaches the system failure level of 100% that is set at the factory. With previous configuration by means of the DALI Professional soft ...
... If the EVGs are still supplied with voltage from another power supply line, these call up – consequent to the lacking DALI communication – until voltage restoration reaches the system failure level of 100% that is set at the factory. With previous configuration by means of the DALI Professional soft ...
G7J-2A2B-B DC12 Datasheet
... 2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method. 3. The operate and the release times were measured with the rated voltage imposed with any contact bounce ignored at an ambient temperature of 23°C. 4. The insulation resistance was measured with a 500-VDC megger ...
... 2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method. 3. The operate and the release times were measured with the rated voltage imposed with any contact bounce ignored at an ambient temperature of 23°C. 4. The insulation resistance was measured with a 500-VDC megger ...
Farm Pro Pig Installation Manual
... The Farm Pro Pigs increases the fan power as ventilation requirements rise. The increments should be proportional from level to level. This means that the ventilation increases about 50% to 100% at each level. For example, at Level One a single fan is set to 0.5 minutes on and 9.5 minutes off. At Le ...
... The Farm Pro Pigs increases the fan power as ventilation requirements rise. The increments should be proportional from level to level. This means that the ventilation increases about 50% to 100% at each level. For example, at Level One a single fan is set to 0.5 minutes on and 9.5 minutes off. At Le ...
Characterictics Program CurveSelect
... “tripping class” (Class 5, 10, 20, etc.) is know for a similar function with the electronic motor-protective relay, and allows the max. tripping time at 7.2 times the current setting Ir. On relays the standard setting is Class 10 A with tr = 10 s. The short-circuit circuit-breakers without overload ...
... “tripping class” (Class 5, 10, 20, etc.) is know for a similar function with the electronic motor-protective relay, and allows the max. tripping time at 7.2 times the current setting Ir. On relays the standard setting is Class 10 A with tr = 10 s. The short-circuit circuit-breakers without overload ...
MV Controller
... enclosure. The relay thus will maintain its insulation capability even if deployed in harsh, dusty environments. The relay must provide 20 flexible functions that can be used to create additional protection functions to maximize application flexibility. ...
... enclosure. The relay thus will maintain its insulation capability even if deployed in harsh, dusty environments. The relay must provide 20 flexible functions that can be used to create additional protection functions to maximize application flexibility. ...
MV Controller
... enclosure. The relay thus will maintain its insulation capability even if deployed in harsh, dusty environments. The relay must provide 20 flexible functions that can be used to create additional protection functions to maximize application flexibility. ...
... enclosure. The relay thus will maintain its insulation capability even if deployed in harsh, dusty environments. The relay must provide 20 flexible functions that can be used to create additional protection functions to maximize application flexibility. ...
2 Faults, types and effects 2.1 The development of simple distribution systems
... By design, this inherent series impedance in a power system is purposely chosen to be as low as possible in order to get maximum power transfer to the consumer so that unnecessary losses in the network are limited thereby increasing the distribution efficiency. Hence, the fault current cannot be dec ...
... By design, this inherent series impedance in a power system is purposely chosen to be as low as possible in order to get maximum power transfer to the consumer so that unnecessary losses in the network are limited thereby increasing the distribution efficiency. Hence, the fault current cannot be dec ...
PQ1 Power Quality Relay Full Data Sheet 1.20
... The wire cross section must be adequate for 100mA, and insulation must be adequate for the rated voltage. The PQ1 may be connected line-to-neutral or line-to-line. Do not connect any load, including the PQ1, from line-to-ground. If your PQ1 will be monitoring 277 Vrms, 400 Vrms, 480 Vrms, or higher, ...
... The wire cross section must be adequate for 100mA, and insulation must be adequate for the rated voltage. The PQ1 may be connected line-to-neutral or line-to-line. Do not connect any load, including the PQ1, from line-to-ground. If your PQ1 will be monitoring 277 Vrms, 400 Vrms, 480 Vrms, or higher, ...
CA235001EN
... Eaton isolates electrical equipment during normal service conditions and provides a path to ground for surge current during arrester operations with its Cooper Power series protective gaps. Protective gaps used for interconnection of arrester ground, secondary neutral, and transformer tank provide a ...
... Eaton isolates electrical equipment during normal service conditions and provides a path to ground for surge current during arrester operations with its Cooper Power series protective gaps. Protective gaps used for interconnection of arrester ground, secondary neutral, and transformer tank provide a ...
SHORT CIRCUIT ANALYSIS FOR POWER SYSTEM NETWORKS
... the main focus of this report. The following observations have been made based on the results obtained from the analysis: In three-phase fault, the voltages at faulted bus phases dropped to zero during the fault. The faulted bus is bus number four where Phase A, B and C has a zero voltage potentia ...
... the main focus of this report. The following observations have been made based on the results obtained from the analysis: In three-phase fault, the voltages at faulted bus phases dropped to zero during the fault. The faulted bus is bus number four where Phase A, B and C has a zero voltage potentia ...
REMATIC
... The control unit is the heart of the DMS3 system. The control unit processes data from sensors and inputs and analyses the data and issues commands to control the electric motor - used to drive the actuator. The control unit adjusts the output and relay settings and transmits data to displays. The c ...
... The control unit is the heart of the DMS3 system. The control unit processes data from sensors and inputs and analyses the data and issues commands to control the electric motor - used to drive the actuator. The control unit adjusts the output and relay settings and transmits data to displays. The c ...
MV Circuit Breaker Switchgear 5 kV-15 kV
... insulated with fluidized bed epoxy coating or equivalent. Sleeve type insulation shall not be permitted. Bus connection joints shall be insulated with preformed PVC boots held together with nylon hardware for easy installation and removal during servicing. Copper bus bars shall be bead-blasted prior ...
... insulated with fluidized bed epoxy coating or equivalent. Sleeve type insulation shall not be permitted. Bus connection joints shall be insulated with preformed PVC boots held together with nylon hardware for easy installation and removal during servicing. Copper bus bars shall be bead-blasted prior ...
Protective relay
In electrical engineering, a protective relay is a device designed to trip a circuit breaker when a fault is detected. The first protective relays were electromagnetic devices, relying on coils operating on moving parts to provide detection of abnormal operating conditions such as over-current, over-voltage, reverse power flow, over- and under- frequency. Microprocessor-based digital protection relays now emulate the original devices, as well as providing types of protection and supervision impractical with electromechanical relays. In many cases a single microprocessor relay provides functions that would take two or more electromechanical devices. By combining several functions in one case, numerical relays also save capital cost and maintenance cost over electromechanical relays. However, due to their very long life span, tens of thousands of these ""silent sentinels"" are still protecting transmission lines and electrical apparatus all over the world. An important transmission line or generator unit will have cubicles dedicated to protection, with many individual electromechanical devices, or one or two microprocessor relays.The theory and application of these protective devices is an important part of the education of an electrical engineer who specializes in power systems. The need to act quickly to protect circuits and equipment as well as the general public often requires protective relays to respond and trip a breaker within a few thousandths of a second. In these cases it is critical that the protective relays are properly maintained and regularly tested.