Report on Industrial Visit to 230/110 Kv Singaperumalkoil
... Transmission line: Used for transmitting high voltage and high frequency signals. Wave trapper: Used for trapping the high frequency (audio signals) and allows only law frequency signals to pass through it. This devise is used to send audio signals and hence act as a separate communication channel. ...
... Transmission line: Used for transmitting high voltage and high frequency signals. Wave trapper: Used for trapping the high frequency (audio signals) and allows only law frequency signals to pass through it. This devise is used to send audio signals and hence act as a separate communication channel. ...
Ch 4 - Optocouplers
... be transferred from one subsystem to another within a piece of electronics equipment, or from one piece of equipment to another, without making a direct electrical connection. Often this is because the source and destination are at very different voltage levels, like a microprocessor which is operat ...
... be transferred from one subsystem to another within a piece of electronics equipment, or from one piece of equipment to another, without making a direct electrical connection. Often this is because the source and destination are at very different voltage levels, like a microprocessor which is operat ...
8x20 A Relay Controller (499)
... Designed for installations that use a lot of power, such as high-bay luminaires and do not require dimming capabilities. ...
... Designed for installations that use a lot of power, such as high-bay luminaires and do not require dimming capabilities. ...
DELCON Solid state output relays for standard and inductive loads
... Used for all nominal voltages from 0 to 240 VAC. Pulse transformer technology means that the triac receives a continuous control current throughout the AC cycle, so Delcon can use much stronger triacs. This means that the triac does not need to be protected from fast voltage transients with an RC ci ...
... Used for all nominal voltages from 0 to 240 VAC. Pulse transformer technology means that the triac receives a continuous control current throughout the AC cycle, so Delcon can use much stronger triacs. This means that the triac does not need to be protected from fast voltage transients with an RC ci ...
Current-Only Directional Overcurrent Relay
... IRECTIONAL overcurrent relays [1] are widely used for protection of power transmission systems. Distributionside protection, e.g., for radial and ring-main units [2], mostly employs non-directional relays. Here, a fault generally means an overcurrent [3], mainly from a short circuit. The nondirectio ...
... IRECTIONAL overcurrent relays [1] are widely used for protection of power transmission systems. Distributionside protection, e.g., for radial and ring-main units [2], mostly employs non-directional relays. Here, a fault generally means an overcurrent [3], mainly from a short circuit. The nondirectio ...
Relay coupler
... The IM73-12-R/24VUC 1-channel relay coupler is particularly suitable for use as a coupling module for the safe galvanic isolation of binary signals. 2 synchronous controlled relays, each with 1 changeover contact are provided at the output. ...
... The IM73-12-R/24VUC 1-channel relay coupler is particularly suitable for use as a coupling module for the safe galvanic isolation of binary signals. 2 synchronous controlled relays, each with 1 changeover contact are provided at the output. ...
ps3-presentation
... At lower voltages tests expensive -> tools needed CN: Deviation of power frequency component relay. Zero sequence source impedance artificially decreased. Adaptive functionality. JP: Special directional scheme. Based on memory function -> operating time delay for V inversion. Three directional d ...
... At lower voltages tests expensive -> tools needed CN: Deviation of power frequency component relay. Zero sequence source impedance artificially decreased. Adaptive functionality. JP: Special directional scheme. Based on memory function -> operating time delay for V inversion. Three directional d ...
Low Thermal Scanner
... each relay switches the input lines to two different output circuits. Both high and low input lines are switched. This dual arrangement allows difference measurements to be made between voltage devices. True four-terminal measurements can also be made on resistance devices by using two input channel ...
... each relay switches the input lines to two different output circuits. Both high and low input lines are switched. This dual arrangement allows difference measurements to be made between voltage devices. True four-terminal measurements can also be made on resistance devices by using two input channel ...
Graphical User Interface for Numerical Protection Relay
... 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-transm ...
... 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-transm ...
resys b 420
... 3. “RESET” pushbutton: reset fault alarm charge parameter, scroll. 4. “MENU” pushbutton: select for menu activation or to confirm setting in menu mode. 5. Alarm Leds: activated in case of alarm and blinking in case of faults. ...
... 3. “RESET” pushbutton: reset fault alarm charge parameter, scroll. 4. “MENU” pushbutton: select for menu activation or to confirm setting in menu mode. 5. Alarm Leds: activated in case of alarm and blinking in case of faults. ...
DELCON Presentation - Weidmuller B2B Portal
... Pulse Transformer Solid state relays based on own development since end of 70´s Own development and assembly in Nummela, near Helsinki Effective use of local sub-suppliers ...
... Pulse Transformer Solid state relays based on own development since end of 70´s Own development and assembly in Nummela, near Helsinki Effective use of local sub-suppliers ...
End Semester Examination-2004
... 5. In a capacitance graded voltage transformer the inductor is tuned to resonate at 5th harmonic frequency. 6. Generator armature winding differential protection is ‘far more’ sensitive than corresponding transformer differential protection. 7. Auxiliary CTs are used to match turns ratio mismatch in ...
... 5. In a capacitance graded voltage transformer the inductor is tuned to resonate at 5th harmonic frequency. 6. Generator armature winding differential protection is ‘far more’ sensitive than corresponding transformer differential protection. 7. Auxiliary CTs are used to match turns ratio mismatch in ...
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.