Current Transformers
... A current transformer is an instrument that transforms one current value to another current value (e.g. 100A to 5A.) The advantage of using a current transformer in an industrial context is that it provides galvanic isolation from the voltage on the primary winding while simultaneously furnishing a ...
... A current transformer is an instrument that transforms one current value to another current value (e.g. 100A to 5A.) The advantage of using a current transformer in an industrial context is that it provides galvanic isolation from the voltage on the primary winding while simultaneously furnishing a ...
D_LKAT2_revA
... True bi-directional performance. Ideal for difficult magnetic applications. No position or bus analysis needed. Standard alarm relay provides reverse or over-current protection. Extremely compact with excellent environmental specifications for installation flexibility, inside or outside. Standard Ac ...
... True bi-directional performance. Ideal for difficult magnetic applications. No position or bus analysis needed. Standard alarm relay provides reverse or over-current protection. Extremely compact with excellent environmental specifications for installation flexibility, inside or outside. Standard Ac ...
Generator Stator Protection, under/over voltage, under /over
... detect the fault beyond the generator, it the time co-ordination is necessary to over come this difficulty. If we use the star- delta transformer bank, then it will block the flow of ground currents, thus preventing the occurrence of the fault on other side of the bank from operating ground relays. ...
... detect the fault beyond the generator, it the time co-ordination is necessary to over come this difficulty. If we use the star- delta transformer bank, then it will block the flow of ground currents, thus preventing the occurrence of the fault on other side of the bank from operating ground relays. ...
Model 3732 Quad 4x28 Reed Relay Matrix Card Specifications
... MATRIX CONFIGURATION Four banks, each with 4 rows by 28 columns of reed relays. Bank configuration and analog backplane relays are included for additional matrix configurations. Banks can be connected together using relays, creating dual 4x56 matrices or a single 4x112 matrix. Row and column expansi ...
... MATRIX CONFIGURATION Four banks, each with 4 rows by 28 columns of reed relays. Bank configuration and analog backplane relays are included for additional matrix configurations. Banks can be connected together using relays, creating dual 4x56 matrices or a single 4x112 matrix. Row and column expansi ...
MiniPro - Telephone Switching International
... A totally self-contained and sealed, multi-environment repeater for those times when an additional T1 circuit is needed in a hurry. The SPC TelEquip Encapsulated MiniPro™ T1 repeater is not affected by moisture, corrosive atmosphere, heat or cold. The compact size allows for simplified mounting on a ...
... A totally self-contained and sealed, multi-environment repeater for those times when an additional T1 circuit is needed in a hurry. The SPC TelEquip Encapsulated MiniPro™ T1 repeater is not affected by moisture, corrosive atmosphere, heat or cold. The compact size allows for simplified mounting on a ...
Product profile
... Residential MCBs are to AS/NZS60898.1 only. Commercial and Industrial MCBs are to AS/NZS60898.1 and to IEC60947.2 which is where cascading and discrimination are offered, along with many accessories and auxiliaries ...
... Residential MCBs are to AS/NZS60898.1 only. Commercial and Industrial MCBs are to AS/NZS60898.1 and to IEC60947.2 which is where cascading and discrimination are offered, along with many accessories and auxiliaries ...
D3000 1.4 - Electromagnetic Devices-1
... * Note that separate test instruments are not needed if the D3000 VIP is used, as all required test equipment is provided in the form of on-screen ‘virtual’ instruments. If a D3000 VIP is used, or if the study module is to be used in a ClassAct computer managed learning environment, then a student P ...
... * Note that separate test instruments are not needed if the D3000 VIP is used, as all required test equipment is provided in the form of on-screen ‘virtual’ instruments. If a D3000 VIP is used, or if the study module is to be used in a ClassAct computer managed learning environment, then a student P ...
1 Semester
... Protective Relays : Relaying review, characteristics and operating equations of relays. CT’s and PT’s differential relay, overcurrent relay, reverse power relay, distance relays, applications of relays. Unit 2 Static Relays : Principles of static relay comparators (Amplitude & phase comparator), Typ ...
... Protective Relays : Relaying review, characteristics and operating equations of relays. CT’s and PT’s differential relay, overcurrent relay, reverse power relay, distance relays, applications of relays. Unit 2 Static Relays : Principles of static relay comparators (Amplitude & phase comparator), Typ ...
CT VT CVT
... • Current transformers generally work at a low flux density. Core is then made of very good metal to give small magnetizing current. • On open-circuit, secondary impedance now becomes infinite and the core saturates. This induces a very high voltage in the primary up to approximately system volts an ...
... • Current transformers generally work at a low flux density. Core is then made of very good metal to give small magnetizing current. • On open-circuit, secondary impedance now becomes infinite and the core saturates. This induces a very high voltage in the primary up to approximately system volts an ...
KD-10 (0.75 – 21.0 ohm)
... will prevent a current over range of the test set in use and optimally requires between 5 and 10 amps of test current. Use the relay settings to calculate the appropriate pickup current with the chosen fault voltage level. Formulas for calculation of the relay impedance setting and fault current are ...
... will prevent a current over range of the test set in use and optimally requires between 5 and 10 amps of test current. Use the relay settings to calculate the appropriate pickup current with the chosen fault voltage level. Formulas for calculation of the relay impedance setting and fault current are ...
Overcurrents
... temperature rise is trivial and has no harmful effect on the circuit components. (It is important that protective devices do not react to them.) Continuous overloads can result from defective motors (such as worn motor bearings), overloaded equipment, or too many loads on one circuit. Such sustained ...
... temperature rise is trivial and has no harmful effect on the circuit components. (It is important that protective devices do not react to them.) Continuous overloads can result from defective motors (such as worn motor bearings), overloaded equipment, or too many loads on one circuit. Such sustained ...
High Temperature Proximity Sensors
... Operates in temperatures up to 120ºC / 248ºF Short circuit & reverse polarity protection on NPN & PNP versions Increase Current Switching Current on NPN & PNP versions CE & RoHS compliant. Miniature size Shock and vibration resistant Protection degree IP67: dust tight and protection from the effects ...
... Operates in temperatures up to 120ºC / 248ºF Short circuit & reverse polarity protection on NPN & PNP versions Increase Current Switching Current on NPN & PNP versions CE & RoHS compliant. Miniature size Shock and vibration resistant Protection degree IP67: dust tight and protection from the effects ...
Implementing Emergency Circuits in Greengate Centralized Lighting Control Panels
... hardware override of all lighting loads in the event of an emergency. In ControlKeeper systems the relay cards communicate through a Relay Stack Controller (RSC) to the panel logic board. The logic board would normally command the relay cards to switch lighting loads based on system programming that ...
... hardware override of all lighting loads in the event of an emergency. In ControlKeeper systems the relay cards communicate through a Relay Stack Controller (RSC) to the panel logic board. The logic board would normally command the relay cards to switch lighting loads based on system programming that ...
G6K-2F-RF-V
... one week at 30°C or less and 60% RH or less.) If the Relay is left for a long time after opening the moisture-proof package, the appearance may suffer and seal failure may occur after the solder mounting process. To store the Relay after opening the moisture-proof package, place it into the original ...
... one week at 30°C or less and 60% RH or less.) If the Relay is left for a long time after opening the moisture-proof package, the appearance may suffer and seal failure may occur after the solder mounting process. To store the Relay after opening the moisture-proof package, place it into the original ...
eet 3086 power transmission and distribution
... current, which can be many times the normal operating current of the motor. On the other hand, it must be low enough to provide effective protection against phase faults occurring at the motor terminals. In the case where the initial peak of the motor starting current could exceed the overcurrent re ...
... current, which can be many times the normal operating current of the motor. On the other hand, it must be low enough to provide effective protection against phase faults occurring at the motor terminals. In the case where the initial peak of the motor starting current could exceed the overcurrent re ...
SUR357Z / SUR358Z - Bender Benelux BV
... The SUR357Z/358Z series relays are designed for voltage monitoring in three-phase AC systems. The relays can be used for undervoltage and overvoltage monitoring (window function). Neutral conductor connection is not required, hence the relays are suitable for 3AC and 3NAC systems. Supply voltage and ...
... The SUR357Z/358Z series relays are designed for voltage monitoring in three-phase AC systems. The relays can be used for undervoltage and overvoltage monitoring (window function). Neutral conductor connection is not required, hence the relays are suitable for 3AC and 3NAC systems. Supply voltage and ...
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.