1. Rittal cabinet can be divided into three series from the structure, ES cabinet (five-fold profile cabinet), PS cabinet (nine-fold profile cabinet), TS cabinet (sixteen-fold profile cabinet), the biggest feature is that the Rittal cabinet is the selection of profile structure structure, the structure of the cabinet is welded first, and then the top plate, bottom plate, side panel, door...

1. The air conditioner shows the H1 fault code - the reason When the outdoor temperature is low and the humidity is high, the heat exchanger of the outdoor unit will be frosted after the air conditioner runs for a period of time, and then the automatic defrosting function will be activated, and the heating operation will be temporarily suspended for 5-10 minutes. Air conditioner heating defrost shows H1 which is normal ...

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...

1. Disconnect the power supply, check whether the rack of the control cabinet has reliable grounding, and make the grounding resistance not greater than 4Ω. 2. There are voltages of different properties on the control cabinet (DC 110V; Communication single-phase 220V; Three-phase communication), the circuit must be distinguished during maintenance to avoid short-circuit accidents.

First, the construction process Equipment unpacking inspection→ equipment handling, → cabinet (plate), basic installation, → above the cabinet (plate), bus preparation, → cabinet (plate), secondary circuit wiring, → cabinet (plate) test adjustment, → power transmission operation acceptance Second, the construction process 1. Equipment unpacking inspection, installation ...

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1. Preparation First of all, the user should be notified to organize the cabinet without affecting the normal operation of the user. Then, according to the topology of the network, the existing equipment, the number of users, the user group and other factors, the wiring diagram and equipment inside the cabinet are outlined.

What is a Network Cabinet? The network cabinet is a kind of rectangular cabinet composed of two parts: frame and cover, which can install switches, optical fiber adapters, optical fiber distribution frames and other equipment in a cabinet, with electromagnetic barrier, noise blocking, ventilation and heat dissipation, anti-vibration, anti-corrosion, etc.

Thermal function: Due to the existence of thermal expansion and contraction, we should also pay attention to the thermal function of industrial control cables, that is, the temperature resistance level of industrial control cables, the heating and heat dissipation characteristics of cables for power transmission at working temperatures, current carrying capacity, short circuit and overload capabilities, the thermal deformation and thermal impulse resistance of the constituent materials.

Industrial wires and cables include single-core wires and cables, rubber cables, shielded control cables, flame-retardant cables, fire-resistant cables, etc. Single-core wire and cable It means that there is only one conductor in the insulation layer, the common BV wire, and B represents the wiring; V stands for insulating polyvinyl chloride. Suitable for AC ...

1. Meet the needs of a variety of electrical appliances Relatively speaking, in the process of making industrial bus industrial control cables, the relevant standards of various information in the process of dissemination are fully considered. In this way, it can ensure that the industrial control cable can meet the needs of many electrical appliances in daily work.

1. Conductor It is the main component of the product to play its use function, and it is to transmit electricity or information, that is, to transmit electric current or electromagnetic waves on the conductor. The conductor is the basic and indispensable main component of the product for the transmission of electric current or electromagnetic wave information. 2. Insulation ...

41. Can power lines be divided into according to the erection method? A: Overhead power lines and cable lines. 42 What is a protective relay? Answer: It can reflect the failure or abnormal operation of electrical equipment in the power system, and act on the switch to trip or send out a signal ...

51 What are the factors that affect the degree of harm to the human body caused by electric shock? Answer: Factors such as the magnitude of the current, the duration of the current, the path of the current, the resistance of the human body and the frequency of the current. 52 Types of electric shock? Answer: Direct electric shock, indirect electric contact, inductive ...

What is Arc? Arc is a physical phenomenon generated during the operation of electrical equipment, which is characterized by very strong light and high temperature. Classification of electrical loads? Primary load: those whose power supply interruption will cause personal injury or death; or those that will cause significant losses politically or economically. ...

What is a substation? A: It is a power supply hub that receives electrical energy from the power system, transforms (boosts or downgrades), and then distributes the power. What is the main role of transformers in the power system? Answer: The main function is to convert the voltage to facilitate ...

What are the main parameters of the transformer? Answer: (1) rated voltage; (2) Rated current; (3) Rated capacity; (4) No-load current; (5) No-load loss; (6) Short-circuit loss; (7) Impedance voltage; (8) Winding connection diagram, phasor diagram and ...

1. The cabinet and chassis products provide space for power supplies, motherboards, various expansion boards, floppy disk drives, optical disk drives, hard disk drives and other storage devices, and these spare parts are firmly fixed through the internal supports, brackets, various chassis screws or clips and other connectors inside the cabinet and chassis.

What is eddy current? What are the harms of eddy currents? Answer: When an alternating current is passed through a wire, an alternating magnetic field is created around the wire. An induced current is generated inside the whole conductor in an alternating magnetic field, and because this induced current forms a closed loop inside the whole conductor, ...

What are the common decompression starting methods of cage asynchronous motors? Answer: (1) Three-phase resistance decompression start. (2) The reactor starts under reduced pressure. (3) Autotransformer decompression start. (4) Star delta decompression start. (5) Extension ...

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 ...