Archived: FP-RLY-420 Operating Instructions
... As with any hazardous voltage wiring, make sure that all wiring and connections meet applicable electrical codes and commonsense practices. Mount terminal bases and backplanes in an area, position, or cabinet that prevents accidental or unauthorized access to wiring that carries hazardous voltages. ...
... As with any hazardous voltage wiring, make sure that all wiring and connections meet applicable electrical codes and commonsense practices. Mount terminal bases and backplanes in an area, position, or cabinet that prevents accidental or unauthorized access to wiring that carries hazardous voltages. ...
Earth fault relays with separate toroids Vigirex Merlin Gerin
... I∆n/2 alarm threshold Vigirex type AP relays have an alarm threshold that warns of a non-critical degradation of the insulation, leaving time to carry out preventive maintenance. The alarm threshold is set automatically at In∆/2, where I∆/n is the residual operating current. The alarm is indicated b ...
... I∆n/2 alarm threshold Vigirex type AP relays have an alarm threshold that warns of a non-critical degradation of the insulation, leaving time to carry out preventive maintenance. The alarm threshold is set automatically at In∆/2, where I∆/n is the residual operating current. The alarm is indicated b ...
No Slide Title
... One of eight standard overload curves may be programmed based on motor manufacturer’s locked rotor time capability. Alternately, the user may program in a custom curve using the builtin FlexCurve™ function. ...
... One of eight standard overload curves may be programmed based on motor manufacturer’s locked rotor time capability. Alternately, the user may program in a custom curve using the builtin FlexCurve™ function. ...
Time Delay Relays – Application Data
... • opening or closing of a trigger signal (Off Delay, Single Shot & Watchdog). These trigger signals can be one of two designs: • a control switch (dry contact), i.e., limit switch, push button, float switch, etc. • voltage (commonly known as a power trigger). To help understand, some definitions are ...
... • opening or closing of a trigger signal (Off Delay, Single Shot & Watchdog). These trigger signals can be one of two designs: • a control switch (dry contact), i.e., limit switch, push button, float switch, etc. • voltage (commonly known as a power trigger). To help understand, some definitions are ...
Vital Relays
... applications requiring a vital time delay. The unit features a wide voltage range and selectable time range which eliminate the need to stock separate timers with different input voltages and time ranges. One unit does it all. The MICROCHRON II Timer uses solid-state components and a vitally program ...
... applications requiring a vital time delay. The unit features a wide voltage range and selectable time range which eliminate the need to stock separate timers with different input voltages and time ranges. One unit does it all. The MICROCHRON II Timer uses solid-state components and a vitally program ...
overcurrent protection and voltage sag coordination
... depends on the operating time of the overcurrent protective device. The normal coordination procedure is obtained by comparing the sensitive equipment (SE) dropout curve with the timevoltage characteristic (TVC) of the protective device. Under normal operating system conditions Z1 is approximately c ...
... depends on the operating time of the overcurrent protective device. The normal coordination procedure is obtained by comparing the sensitive equipment (SE) dropout curve with the timevoltage characteristic (TVC) of the protective device. Under normal operating system conditions Z1 is approximately c ...
FP5000 Feeder Protection
... • Battery backed up trip LED for target indication even if station is dead ...
... • Battery backed up trip LED for target indication even if station is dead ...
Proper Coil Drive is Critical to Good Relay and
... DC coil current is solely determined by the applied voltage and the resistance of the coil. If voltage decreases or resistance increases, then coil current decreases - resulting in lower AT and thus reduced magnetic force in the coil. AC coil current is similarly affected by applied voltage and coil ...
... DC coil current is solely determined by the applied voltage and the resistance of the coil. If voltage decreases or resistance increases, then coil current decreases - resulting in lower AT and thus reduced magnetic force in the coil. AC coil current is similarly affected by applied voltage and coil ...
AC-600 Terminal Controller
... control industry for performance, reliability and ease of installation. Compatible with any Threshold system, the AC-600 supervises all access control decisions and alarm detection. Each AC-600 features a standard memory capacity of 4000 cardholders. The system can upgrade the number of cardholders ...
... control industry for performance, reliability and ease of installation. Compatible with any Threshold system, the AC-600 supervises all access control decisions and alarm detection. Each AC-600 features a standard memory capacity of 4000 cardholders. The system can upgrade the number of cardholders ...
UPEC 2010 - Preparation of Papers in Two
... small contribution from the healthy path (without faults) can be observed. This behavior is similar to the short circuit behavior of a transmission line with tap. Additionally the power consumption of loads in the healthy path is mainly provided by the distributed generation in this path. Since the ...
... small contribution from the healthy path (without faults) can be observed. This behavior is similar to the short circuit behavior of a transmission line with tap. Additionally the power consumption of loads in the healthy path is mainly provided by the distributed generation in this path. Since the ...
Integration of IEC 61850 GSE and Sampled Value Services to
... a dedicated point-to-point interface. Problems occur when trying to implement station-wide protection services such as ...
... a dedicated point-to-point interface. Problems occur when trying to implement station-wide protection services such as ...
VisiPak V438 Data Sheet
... panel that fits 1/8 DIN cutouts. Four visual setpoint alarms are annunciated via individual front panel LEDs and are a standard feature of the indicator. Two form C relays are available as optional outputs for the first two setpoints. They can be configured as high or low, failsafe or nonfailsafe. E ...
... panel that fits 1/8 DIN cutouts. Four visual setpoint alarms are annunciated via individual front panel LEDs and are a standard feature of the indicator. Two form C relays are available as optional outputs for the first two setpoints. They can be configured as high or low, failsafe or nonfailsafe. E ...
Battery Isolator Controller
... It operates as an isolator by sensing the level of voltage on the chassis 12 volt system. When this voltage goes above 13.3 volts for approximately 12 seconds, as happens when the engine is running normally (normal alternator output voltage is approximately 14.4 volts), it will close the isolator re ...
... It operates as an isolator by sensing the level of voltage on the chassis 12 volt system. When this voltage goes above 13.3 volts for approximately 12 seconds, as happens when the engine is running normally (normal alternator output voltage is approximately 14.4 volts), it will close the isolator re ...
SAE-1100 Series Carbon Monoxide (CO) Detectors
... Such information is crucial to demand controlled ventilation that ensures adequate indoor air quality while minimizing the energy costs of conditioning outside air. The KMC SAE-1100 series environmental, industrial, and commercial indoor detectors are available in both space and duct mount versions. ...
... Such information is crucial to demand controlled ventilation that ensures adequate indoor air quality while minimizing the energy costs of conditioning outside air. The KMC SAE-1100 series environmental, industrial, and commercial indoor detectors are available in both space and duct mount versions. ...
50A-3PH 3 Phase Current Injection System
... The unit has a range of outputs allowing injection of currents as low as a few mA and as high as 50A. Voltages up to 18V are available on the main outputs. Three true RMS metering ranges are provided, allowing the full scale of the meter and trip level to be set independently of the selected output. ...
... The unit has a range of outputs allowing injection of currents as low as a few mA and as high as 50A. Voltages up to 18V are available on the main outputs. Three true RMS metering ranges are provided, allowing the full scale of the meter and trip level to be set independently of the selected output. ...
Protective Relay Application Guide
... the power distribution authority, it is possible to use an accelerated system. This consists of reducing the relay time-delay to a pre-determined minimum value when the fault is on the section immediately downstream. The information required to achieve this is transmitted from the downstream relay t ...
... the power distribution authority, it is possible to use an accelerated system. This consists of reducing the relay time-delay to a pre-determined minimum value when the fault is on the section immediately downstream. The information required to achieve this is transmitted from the downstream relay t ...
50A-3PH 3 Phase Current Injection System
... Pulse mode is used for setting the current level in devices sensitive to heating, and allows current to be injected for 600ms and the current recorded. Current operated mode operates on one output phase ...
... Pulse mode is used for setting the current level in devices sensitive to heating, and allows current to be injected for 600ms and the current recorded. Current operated mode operates on one output phase ...
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.