PRO-2200 Two Reader Module Installation Manual
... control. Two of the six form-C relay outputs are sized for the inductive load of door locks and the other four are designed to handle dry-circuit signals. All of the inputs are capable of four-state supervision except the two dedicated inputs. Communication to the control panel is accomplished via a ...
... control. Two of the six form-C relay outputs are sized for the inductive load of door locks and the other four are designed to handle dry-circuit signals. All of the inputs are capable of four-state supervision except the two dedicated inputs. Communication to the control panel is accomplished via a ...
Reclosers INTRODUCTION
... Current”: “The rated symmetrical making current shall be the same value as the rated symmetrical interrupting current, with maximum symmetry corresponding to the X/R ratio”. This rating establishes the capability to close in on any symmetric or asymmetric current within the interrupting rating of th ...
... Current”: “The rated symmetrical making current shall be the same value as the rated symmetrical interrupting current, with maximum symmetry corresponding to the X/R ratio”. This rating establishes the capability to close in on any symmetric or asymmetric current within the interrupting rating of th ...
High Voltage SIL/SIP Reed Relays
... The Series 104 is a range of Single-In-Line reed relays intended for voltages that are beyond the capabilities of conventional SIL reed relays. They are ideal for such applications as transformer or cable testing or any other automatic test equipment where high voltages are involved. Where mains vol ...
... The Series 104 is a range of Single-In-Line reed relays intended for voltages that are beyond the capabilities of conventional SIL reed relays. They are ideal for such applications as transformer or cable testing or any other automatic test equipment where high voltages are involved. Where mains vol ...
Integrated protection based on multi
... line. In order to improve the performance of the conventional protection to meet new requirements for halfwavelength transmission line, the integrated protection based on both power frequency and transient information is presented in this paper. According to the electromagnetic theory, the energy tr ...
... line. In order to improve the performance of the conventional protection to meet new requirements for halfwavelength transmission line, the integrated protection based on both power frequency and transient information is presented in this paper. According to the electromagnetic theory, the energy tr ...
Commutator
... Brush friction loss Pbf = μ pb AB.Vc μ – Coefficient of friction pb-Brush contact pressure on commutator (N/m 2) AB - Total contact area of all brushes (m2) AB =P Ab (for lap winding) = 2 Ab (for wave winding) Vc – Peripheral speed of commutator (m/s) ...
... Brush friction loss Pbf = μ pb AB.Vc μ – Coefficient of friction pb-Brush contact pressure on commutator (N/m 2) AB - Total contact area of all brushes (m2) AB =P Ab (for lap winding) = 2 Ab (for wave winding) Vc – Peripheral speed of commutator (m/s) ...
l90_specs
... Channel asymmetry compensation using GPS-based time reference provided via the IRIG-B input of the relay, for applications on SONET ring where transmit and receive delays may not be equal, shall be available. ...
... Channel asymmetry compensation using GPS-based time reference provided via the IRIG-B input of the relay, for applications on SONET ring where transmit and receive delays may not be equal, shall be available. ...
Excellence in Systems Protection
... Location: Locate the protector on or as close to the service entrance cabinet as possible. It should be shortnippled directly to the service cabinet and located so that the wires used to connect to the bus are as short as possible. (The inductance of the wiring, about 1 micro Henry per meter, result ...
... Location: Locate the protector on or as close to the service entrance cabinet as possible. It should be shortnippled directly to the service cabinet and located so that the wires used to connect to the bus are as short as possible. (The inductance of the wiring, about 1 micro Henry per meter, result ...
issue - IET Electrical
... dedicated circuit. (ii) connection into an existing final circuit. Connection into a dedicated circuit is preferred. Regulation 551.7.2 sets out the requirements for the two options. The Regulation requires that a generating set used as an additional source of supply in parallel with another source ...
... dedicated circuit. (ii) connection into an existing final circuit. Connection into a dedicated circuit is preferred. Regulation 551.7.2 sets out the requirements for the two options. The Regulation requires that a generating set used as an additional source of supply in parallel with another source ...
Overcurrent Protection: Fuses and Circuit Breakers
... • Current-limiting circuit breaker limits the letthrough energy (I2t) to something less than the I2t of a one-half cycle symmetrical wave • When installing circuit breakers, it is important to ensure that: – Circuit breakers have the proper rating – All circuit components can withstand the letthroug ...
... • Current-limiting circuit breaker limits the letthrough energy (I2t) to something less than the I2t of a one-half cycle symmetrical wave • When installing circuit breakers, it is important to ensure that: – Circuit breakers have the proper rating – All circuit components can withstand the letthroug ...
c-pro 3 NODE kilo - Programmable controllers
... GND ground MODBUS slave RS-485 port, MODBUS master/slave RS-485 port and CAN CANBUS port A1/+ positive pole MODBUS master/slave RS-485 port B1/- negative pole MODBUS master/slave RS-485 port A2/+ positive pole MODBUS slave RS-485 port B2/- negative pole MODBUS slave RS-485 port ...
... GND ground MODBUS slave RS-485 port, MODBUS master/slave RS-485 port and CAN CANBUS port A1/+ positive pole MODBUS master/slave RS-485 port B1/- negative pole MODBUS master/slave RS-485 port A2/+ positive pole MODBUS slave RS-485 port B2/- negative pole MODBUS slave RS-485 port ...
Instrument Transformer Basic Technical
... voltages from one magnitude to another or to perform an isolating function, that is, to isolate the utilization current or voltage from the supply voltage for safety to both the operator and the end device in use. Instrument transformers are designed specifically for use with electrical equipment fa ...
... voltages from one magnitude to another or to perform an isolating function, that is, to isolate the utilization current or voltage from the supply voltage for safety to both the operator and the end device in use. Instrument transformers are designed specifically for use with electrical equipment fa ...
Earth Fault Currents in Three Phase systems
... extensive area of research in the field of Electrical Engineering. In this thesis work, emphasis has been given on measuring the earth fault current using three phases. This is due to the fact that, if an earth fault were not to have any threshold, every time there would be an excess charge flowing ...
... extensive area of research in the field of Electrical Engineering. In this thesis work, emphasis has been given on measuring the earth fault current using three phases. This is due to the fact that, if an earth fault were not to have any threshold, every time there would be an excess charge flowing ...
Transition of Magnetic Current Limiter to Superconducting Fault
... variation of the ratio Lu/Ls as a function of rs is shown in figure 11. It is seen that a higher value of Lu/Ls demands a very low value of saturated permeability, rs of the core. It is difficult to get core with that low value of rs. So with the available value of rs, it is difficult o achieve ...
... variation of the ratio Lu/Ls as a function of rs is shown in figure 11. It is seen that a higher value of Lu/Ls demands a very low value of saturated permeability, rs of the core. It is difficult to get core with that low value of rs. So with the available value of rs, it is difficult o achieve ...
D-TEK Vehicle Loop Detector Instructions
... 4. Sensitivity- this rotary switch controls the detector sensitivity. During normal operation the sensitivity setting is 3 or 4. Note: the higher the sensitivity the more prone the detector will be to interference. To increase detection height without increasing the detector sensitivity settings, i ...
... 4. Sensitivity- this rotary switch controls the detector sensitivity. During normal operation the sensitivity setting is 3 or 4. Note: the higher the sensitivity the more prone the detector will be to interference. To increase detection height without increasing the detector sensitivity settings, i ...
Model Number Structure Ordering Information
... Note: 1. Do not use the output from an inverter as the power supply. Refer to Safety Precautions for All Times for details. 2. Single-phase, full-wave-rectified power supplies can be used. 3. When using the H3YN continuously in any place where the ambient temperature is in a range of 45°C to 50°C, s ...
... Note: 1. Do not use the output from an inverter as the power supply. Refer to Safety Precautions for All Times for details. 2. Single-phase, full-wave-rectified power supplies can be used. 3. When using the H3YN continuously in any place where the ambient temperature is in a range of 45°C to 50°C, s ...
QUD 2-Input NAND Gate
... Two IL33197A Devices Using One Decoupling Resistor and Capacitor Two devices may be connected to the power source using a common R1 resistor for protection against overvoltages. If this is done it should be noted that the current flowing through R1 is increased and hence the voltage drop across R1 i ...
... Two IL33197A Devices Using One Decoupling Resistor and Capacitor Two devices may be connected to the power source using a common R1 resistor for protection against overvoltages. If this is done it should be noted that the current flowing through R1 is increased and hence the voltage drop across R1 i ...
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.