EN 60947-5-1（GB 14048.5）
... To replace a broken parts, the following procedure must be strictly observed: ◆Keep all documents and diagrams at hand for reference, otherwise record all wiring connections to avoid wrong connection; ◆Cut off machine power supply to ensure no danger voltage inside the machine, except those for serv ...
... To replace a broken parts, the following procedure must be strictly observed: ◆Keep all documents and diagrams at hand for reference, otherwise record all wiring connections to avoid wrong connection; ◆Cut off machine power supply to ensure no danger voltage inside the machine, except those for serv ...
Littelfuse Introduces Single Fuse Solution for Applications that
... Avoids need to parallel multiple fuses or over-spec industrial-type fuses to handle high currents NUREMBERG, GERMANY, May 17, 2017 — Littelfuse, Inc., the global leader in circuit protection, today introduced a series of UL approved high current, surface mount fuses in conjunction with the Power Con ...
... Avoids need to parallel multiple fuses or over-spec industrial-type fuses to handle high currents NUREMBERG, GERMANY, May 17, 2017 — Littelfuse, Inc., the global leader in circuit protection, today introduced a series of UL approved high current, surface mount fuses in conjunction with the Power Con ...
Insulation Monitoring Relays
... – W hen interrupted wire monitoring is activated, the CM-IWN.1 automatically monitors the network/measuring circuit connections L+ and L- when the system starts up. This can be repeated at any time by activating the test function. CM-IWN.1 and CM-IWS.1 cyclically monitor the measuri ...
... – W hen interrupted wire monitoring is activated, the CM-IWN.1 automatically monitors the network/measuring circuit connections L+ and L- when the system starts up. This can be repeated at any time by activating the test function. CM-IWN.1 and CM-IWS.1 cyclically monitor the measuri ...
Technical Documentation
... which is perfect for integration into large systems. Additional USB 2.0 interface can only be used for a fast setup without the need for auxiliary power supply. This interface is provided with only BASIC insulation and can be used ONLY unconnected to power inputs. ...
... which is perfect for integration into large systems. Additional USB 2.0 interface can only be used for a fast setup without the need for auxiliary power supply. This interface is provided with only BASIC insulation and can be used ONLY unconnected to power inputs. ...
24DC/URD3/4X1/2X2/3
... Check the set time following installation. For PSR applications, only yellow PSR-TBUS connectors (Order No. 2890425) may be used. Connection with another T-BUS is not permitted. Devices may only be mounted on/removed from the T-BUS when the power is switched off. A T-BUS unit can contain a basic dev ...
... Check the set time following installation. For PSR applications, only yellow PSR-TBUS connectors (Order No. 2890425) may be used. Connection with another T-BUS is not permitted. Devices may only be mounted on/removed from the T-BUS when the power is switched off. A T-BUS unit can contain a basic dev ...
Section 4. Inspection Of Circuit
... CHART. Table 11-3 may be used as a guide for the selection of circuit breaker and fuse rating to protect copper conductor wire. This chart was prepared for the conditions specified. If actual conditions deviate materially from those stated, ratings above or below the values recommended may be justif ...
... CHART. Table 11-3 may be used as a guide for the selection of circuit breaker and fuse rating to protect copper conductor wire. This chart was prepared for the conditions specified. If actual conditions deviate materially from those stated, ratings above or below the values recommended may be justif ...
UK1104 - CanaKit
... Note that the ground of the controller will always need to be connected to the ground of the voltage to be measured. Furthermore, make sure you never apply a negative voltage or an AC voltage to any of the inputs. Doing so will damage the controller. If you need to measure a voltage higher than 5V D ...
... Note that the ground of the controller will always need to be connected to the ground of the voltage to be measured. Furthermore, make sure you never apply a negative voltage or an AC voltage to any of the inputs. Doing so will damage the controller. If you need to measure a voltage higher than 5V D ...
BSPM2275TN(R) / BSPH2275TT(R)
... The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information th ...
... The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information th ...
Technical Brief - DC Circuit Protection
... connection to the DC electrical system or to the battery. There are exceptions to this seven-inch rule. If the conductor is connected to a source of power other than a battery terminal and is contained throughout its entire distance in a sheath or enclosure such as a conduit, junction box, control b ...
... connection to the DC electrical system or to the battery. There are exceptions to this seven-inch rule. If the conductor is connected to a source of power other than a battery terminal and is contained throughout its entire distance in a sheath or enclosure such as a conduit, junction box, control b ...
Verify Performance and Safety of Arc-Flash Detection Systems
... One of the challenges of combining the two elements is to make sure the fault detection element for the current is as fast as the light detection element. This is accomplished by using special high-speed sampling and logic to match the response times of both elements with no delay. Although there is ...
... One of the challenges of combining the two elements is to make sure the fault detection element for the current is as fast as the light detection element. This is accomplished by using special high-speed sampling and logic to match the response times of both elements with no delay. Although there is ...
Ground Fault Protection on neon secondaries
... The DCT is a very sensitive device. Its core is usually made of Nickel-Iron which has very high permeability at low flux levels. The secondary is toroidally wound with many turns of fine magnet wire. Accurate and consistent detection of differential leakage current in the range of a few mA is theref ...
... The DCT is a very sensitive device. Its core is usually made of Nickel-Iron which has very high permeability at low flux levels. The secondary is toroidally wound with many turns of fine magnet wire. Accurate and consistent detection of differential leakage current in the range of a few mA is theref ...
TECHNICAL DEFINITION
... Since relay is normally used, it means the standard voltage is applied to the coil. (2)Coil resistance The direct current resistance value of the coil, The value at temperature of 20 degree Celsius (3)Pick-up voltage and set voltage Pick-up voltage means the voltage when the relay reaches operated c ...
... Since relay is normally used, it means the standard voltage is applied to the coil. (2)Coil resistance The direct current resistance value of the coil, The value at temperature of 20 degree Celsius (3)Pick-up voltage and set voltage Pick-up voltage means the voltage when the relay reaches operated c ...
Performance of Relaying During Wide-area Stressed
... • Thermal – Provides protection against loss of life of the transformer – Used for tripping if top oil or Winding Temperature ...
... • Thermal – Provides protection against loss of life of the transformer – Used for tripping if top oil or Winding Temperature ...
Product sheet (PDF/389 kB)
... synchronization of generator units to the power supply grid. It also provides a number of monitoring functions for generator and grid protection. The circuit-breakers are tripped by the module directly via digital outputs and relays. Additional digital inputs enable the monitoring of the relevant sw ...
... synchronization of generator units to the power supply grid. It also provides a number of monitoring functions for generator and grid protection. The circuit-breakers are tripped by the module directly via digital outputs and relays. Additional digital inputs enable the monitoring of the relevant sw ...
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.