Take charge of the basic knowledge of UPS power supply, read the equipment manual attentively, clarify the meaning of various warning signals, warning codes, command lights, and the causes of occurrence and how to deal with them to understand the effects of various switches and buttons of the equipment. Understand the various operations in charge of UPS power supply, understand the connection connection, and understand the method of substitution.
Stabilize the usual inspection and protection to check whether the APC power supply equipment has any alarms, whether there is any peculiar smell, whether there is an extraneous sound, check whether the organizer has a loose fever, whether the cooling fan is running normally, whether the equipment is normal, and deal with the problem in a hurry.
Develop a timing protection plan: regularly measure the voltage, current, power and internal resistance and terminal voltage of the battery delivered by the equipment every month. Quarterly or semi-annual battery to do a check discharge test, usually should release 30% of the rated capacity 40% of the annual cleaning of the APC power supply inside the hygiene, check whether the business is excellent.
APC battery discharge: In the battery discharge operation, if the battery is selected to be offline and the false load is discharged, it is not easy to equip it with complex equipment, and it is not good to be equipped with equipment to recharge it to ensure the safety of the battery discharge test, which can not only find the problem (falling battery, reverse polarity battery, etc.) but also ensure that the power supply is safe and reliable (no over-discharge, short circuit, power supply, etc.) Here is recommended a way to directly use the load to discharge the battery: that is, turn off the UPS communication input switch and let the battery discharge.
Because the uninterruptible power supply is mostly used in important network communication and other systems, the load changes slightly, so the load is directly discharged, and the discharge current is also fixed, so that the discharge end voltage can be determined according to the voltage of the battery and the discharge situation, and the discharge time is calculated.
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The way the frequency of the inverter is given – Schneider
The given frequency refers to the frequency at which the inverter is set to operate, and the given frequency can be given by the operation panel or by the external method, during which the external method is divided into voltage and current.
First, the operation panel is given a frequency ...
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Schneider AC inverter usage category
Under the IEC60947-4 standard, the Schneider communication contactor TVR series must be able to turn on and break the current value, and these currents depend on the type of break that the load is turned on, including squirrel cage or slip ring motor, resistor, when the switch or break is generated in the motor abort, start or run...
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Schneider low-voltage circuit breaker selection
1. Determine the type and maintenance situation of Schneider circuit breaker according to the maintenance requirements of the line, and determine the selection of frame type, device type or current limiting type. Generally speaking, the Schneider frame circuit breaker can break the short-circuit current with a large device type and a large volume. Usually, the branch line chooses ...
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Schneider turbine flowmeter selection considerations
1. According to the requirements of measurement intention:
It is required to select the unit with instantaneous flow rate or cumulative flow rate (cumulative flow), the unit of flow display, measurement accuracy, repeatability, linearity, flow scale and scale, measurement temperature, pressure loss, temperature and pressure compensation, output signal characteristics and echoes.
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Turbine flowmeter selection factor - Schneider
Turbine flowmeter is a kind of speed appearance, it has high precision, good repeatability, no zero drift, high range ratio, simple structure, few moving parts, high pressure resistance, wide measurement scale, small size, light weight, small pressure loss, convenient repair and other advantages, turbine flowmeter has high quality ...
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Schneider inverter ATV61 OPF failure analysis
Q: 250KW ATV61 with 250KW fan, when decelerating to low speed, OPF (motor missing three-phase) problem will be reported occasionally. There are no contactors or switches between the inverter and the motor.
Answer: This situation seems to be a problem with the inverter, which is a false alarm. Not really! The fan is decelerating ...
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Schneider soft-start ATS48 application range
ATS48 soft starter is used in water treatment, food and beverage, mining metallurgy, power and chemicals. Scope of application: including pump fans and large inertia machine compressor conveyors
Advantages: 1. Economical solution
Reduce mechanical stress and increase machine availability.
2. ...
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How to operate the transformer DC resistance tester – Schneider
1. The instrument test has a total of YN winding three-phase test, YN winding three-phase phase-by-phase test, low-voltage winding magnetization method test of iron-core five-column low-voltage angular transformer, low-voltage winding phase selection test and general four-terminal method of ironcore three-column low-voltage angular transformer.
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Instrumentation mechanical equipment system - Schneider
1. Power system:
The wire and cable products selected in the power system mainly include overhead bare wires, busbars (busbars), power cables (plastic cables, oil-paper power cables (fundamentally replaced by plastic power cables), rubber cables, overhead insulated cables), branch cables (replacing part of the busbars), ...
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Schneider selection of different types of circuit breakers
Miniature circuit breakers are: A9 (iC65, iDPN, etc.), M9 (C65, DPN, C120, NG125, etc.), E9, OSMC32N/OSMC65H, etc.
Molded case circuit breakers are: NSX, NSE, EZD, NSC, large molded case NS.
Structural circuit breakers include: MT, MTE, etc.
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Precautions for the installation of low-voltage electrical appliances - Schneider
1. Low-voltage electrical appliances should be equipped in a place without violent vibration, and should have an appropriate height from the ground. It is necessary to connect the power cord such as the knife switch and the load switch to the fixed contact, and it is forbidden to hang the power cord on the knife switch.
2. Low-voltage ...
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Classification of Schneider molded case circuit breakers
1. According to the device method, it is divided into: vertical installation and horizontal installation.
2. According to the use of circuit breakers: power distribution maintenance type, motor maintenance type.
3. According to the wiring method: board front wiring, board back wiring, plug-in wiring.
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Schneider miniature circuit breaker model and parameter difference
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Parameter differences:
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Schneider inverter ATV32 acceleration and deceleration operation method
1. Use the operation method of clicking the button:
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Steps for configuring braking resistors in VFD – Schneider
In the process of controlling the motor, the motor variable-frequency drive (VFD) may still have a certain kinetic energy when the motor rotates intermittently due to factors such as the moment of inertia of the motor, and the braking resistor is required to interrupt the motor.
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Deterioration site and the principle of higher harmonic generation - Schneider
1. Electrical equipment will produce higher harmonics when it produces abnormality and deterioration, and the abnormality and deterioration of motors, loads, and inverters are used to distinguish the higher harmonics from 2 to 40 times, and the data is changed by FFT, and the analysis is made on the basis of the analysis data of long-term savings.
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Precautions for the selection of Schneider foot switches
The foot switch series is XPE, and it should be noted when selecting:
1) Raw materials: metal and plastic, which are used in heavy-duty, high-risk, light-duty, low-risk occasions.
2) Pedal: divided into single pedal and double pedal (type end plus D).
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Solutions to Schneider drive fault codes
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Schneider Electric executive support merger software Saas company
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How Schneider contactors work
How it works
Contactor refers to an electrical appliance that uses a coil to flow through an electric current to generate a magnetic field, so that the contact is closed, and then the load can be controlled. Because it can quickly block the main circuit and frequently connect with the equipment of the high-current control circuit, it has been used in electrical engineering.
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