Opening faults can also be divided into mechanical faults and electrical faults. Electrical faults mainly include open control loops, coil faults, auxiliary switch faults, etc.
1. Fault phenomenon: when the red light is not on, the electric cannot be opened, which is the fault of the auxiliary switch. When the opening coil burns out, there are obvious phenomena such as smoke, peculiar smell, and short fuse melting. An open-circuit fault in the control loop refers to the disconnection of the transfer switch and other parts, and the trip coil cannot be powered.
2. When checking the coil fault, you can use a multimeter to measure the resistance at both ends of the coil. The internal turn is shorted when the resistance is too small or zero, and the internal open circuit is open when the resistance is infinite. The way to find an open circuit fault is to measure the voltage and resistance with a multimeter. There is a voltage at the open circuit point, and the resistance is infinite.
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Rittal enclosures – how to determine the quality of a sheet metal enclosure cabinet
1. Look at the material, you should choose a sheet metal chassis cabinet, and the steel plate must be thick, you can feel which ones are thick and which ones are thin when you knock them with your fingers. Its rugged enclosure protects the board, power supply and storage devices, and is resistant to voltage, shock, and dust.
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Rittal cabinets – Q&A on the basics of high and low voltage distribution cabinets
How many types of protection devices are there for transformers?
A: Overcurrent protection, current quick break protection, differential protection and gas protection.
What are the requirements for relay protection?
Answer: In order to be able to remove the fault correctly and quickly, it is required that the relay protection has sufficient selectivity ...
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Introduction to the features of the Rittal electric cabinet air conditioner
1. Energy saving
The inverter technology can automatically adjust the refrigeration and heating power according to the indoor temperature change, and the power consumption is only 1/3 of the traditional air conditioner, which can save more than 30% of the electricity cost; At the same time, it has a dehumidification function, and it can also keep the indoor air dry when used in a humid environment. OK...
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Rittal cabinets – Q&A on the basics of high and low voltage distribution cabinets
What to do if you notice someone electrocuted?
Answer: First of all, make the electrocuted person quickly disconnect from the power supply. Its method, for low-voltage electric shock, can be used "pull", "cut", "pick", "pull", "pad" method, pull or cut off the power supply, the operation should pay attention to avoid people rescue people electric shock, should ...
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Rittal Cables – the scope of application for wires and cables
Power system
The wire and cable products used in the power system mainly include overhead bare wires, busbars (busbars), power cables (plastic cables, oil-paper power cables, which are basically replaced by plastic power cables), rubber sheathed cables, overhead insulated cables, branch cables (replacing part of the busbars), ...
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A detailed introduction to the classification and division of Rittal cabinet products
Rittal products are divided into:
Rittal control cabinets: small enclosures (polycarbonate enclosures PK, junction enclosures KL, compact control enclosures EB, bus enclosures BG), compact control enclosures, plastic control enclosures KS, enclosure systems (subdivided into TS 8/SE 8 family), and...
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Rittal cabinets – what are the common cabinet cable management processes?
First, the waterfall shape
This is one of the older wiring patterns that can sometimes be seen. It adopts the artistic image of "Huaguo Mountain Water Curtain Cave", and directly hangs the twisted pair from the module of the patch panel, and there is a very beautiful sense of hierarchy when it is neatly distributed (24-48 per layer).
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Rittal Cables – an introduction to the advantages of industrial control cables
Fulfillment of the requirements of many electrical appliances: In the manufacture of industrial control cables, the relevant standards for the transmission of various information are fully considered. This ensures that the industrial control cables can meet the performance requirements of many electrical appliances in their daily work.
Abrasion Resistance: Industrial Control ...
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What is the difference between a control cabinet and a distribution box?
One. The nature is different
Distribution box: There is a large amount of parameter data in the distribution box. It generally constitutes a low-voltage distribution box.
Control cabinet: The control cabinet is to assemble the switch cabinet, measuring instruments, protection devices and auxiliary equipment in a closed or semi-enclosed metal cabinet or screen according to the requirements of electrical wiring.
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Introduction and classification of Rittal switchgears
An introduction to Rittal switchgear
The switch cabinet is a kind of electrical equipment, the outer line of the switch cabinet first enters the main control switch in the cabinet, and then enters the sub-control switch, and each branch is set according to its needs. Such as instrumentation, automatic control, motor magnetic switch, all kinds of AC contactors, etc., ...
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Rittal enclosures – types of sheet metal enclosures
In terms of structure, there are two ways to classify sheet metal cabinets:
According to the division of the cabinet frame, it can be divided into the whole plate type and the column and beam combination type;
According to the way of cabinet angle connection, it can be divided into four forms: adhesive connection, screw connection, pin connection and welded connection.
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Rittal cabinets – Q&A on the basics of high and low voltage distribution cabinets
What is the material of the busbar?
A: Copper busbar, aluminum busbar and steel busbar.
What is the significance of busbar coloring?
Answer: It can increase the radiation capacity, which is conducive to heat dissipation, and the allowable load current can be increased by 12-15% after coloring.
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Rittal cabinets – Q&A on the basics of high and low voltage distribution cabinets
Why use transformers to measure high voltage and high currents?
Answer:
(1) Expand the scope of use of the instrument. As long as the transformer with different transformer ratios and converter ratios is used in conjunction with a voltmeter with a full voltage of 100V and an ammeter with a full current of 5A, it will be ...
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Rittal cabinets – daily maintenance methods for high and low voltage distribution cabinets
Complete set of electrical maintenance knowledge:
1. Low-voltage distribution cabinet
1. Regularly check whether there are traces of pest activity in each cabinet, and carry out trapping regularly.
2. Check whether the warning signs and maintenance signs are placed correctly.
3. Check whether the emergency tools and lamps are in order.
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Rittal enclosures – considerations for control cabinet transfers
First, the assembly process
The assembly process is the guarantee of the assembly work, because only the assembly according to the process can ensure the quality of the assembly work. The process is the standard and requirement of assembly, and only the assembly according to the process can ensure the safety of assembly. However, before the assembly, the technical ...
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Rittal and the Fraunhofer Institute in Germany explain the implementation of the digital twin
How to promote the further development of smart factories and smart production?
The Rittal Hager plant in Germany illustrates how the smart factory can be accelerated with a digital twin in manufacturing!
As one of the world's modern cabinet production bases, the Hager plant has a production capacity of 24,000 square meters.
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Rittal cabinets – precautions for high and low voltage distribution cabinets
1. The elevation or verticality of the distribution box (panel) exceeds the allowable deviation: it is caused by inaccurate measurement and positioning or uneven ground, and should be corrected in time.
2. The iron frame of the distribution box is not square: the iron frame is not straightened and aligned before the installation of the iron frame, or the position of the fixed point is deviated during installation.
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What is the daily maintenance method of the air conditioner? - Rittal air conditioning
1. Filter maintenance of the indoor unit: The filter screen of the indoor unit generally needs to be replaced once every two months. It is not recommended to continue to use it after rinsing, because the rinsed filter is easy to stick, so that ventilation and ventilation are not smooth, and air circulation is affected. So if it's a one-off, direct replacement, not ...
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Rittal cabinets – the specifications of server cabinets
Server cabinets have requirements in terms of depth, height, and load-bearing capacity. There are three heights of 2.0 meters, 1.8 meters and 1.6 meters; The width is 800mm, 700mm or 600mm; There are three depths: 700mm, 800mm and 900mm.
Can be configured: special fixed pallet, special ...
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How to set the temperature of the Rittal air conditioner
1. Set the target temperature: the default temperature of the original factory is 35°C, you can press and hold the set button for more than 1 second after starting, the parameters start to flash, complete the temperature adjustment by pressing the UP and DOWN buttons, and after adjusting to the target temperature, press the set button to store the set parameters.
2. High temperature alarm: ...
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