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Transformers
Power TransformersCustomized power transformers for best price and fast worldwide delivery Power transformers are crucial components in electrical power systems, serving the purpose of changing the voltage levels of electrical energy during transmission and distribution. These transformers facilitate the efficient transfer of power from power plants to various locations, ensuring that electricity can be used at different voltage levels based on specific needs. Here are some key aspects of power transformers: Function: Power transformers primarily perform the function of voltage transformation. They can step up or step down the voltage levels of electrical energy, allowing for efficient transmission and distribution. Step-Up Transformers: These transformers increase the voltage of electrical energy generated at power plants before transmission. Higher voltages are used for long-distance power transmission to minimize energy losses. Step-Down Transformers: Once electrical energy reaches local distribution networks, step-down transformers are employed to reduce the voltage to levels suitable for consumer use. Construction: Power transformers typically consist of a magnetic core made of laminated steel and two sets of coils, known as the primary winding and the secondary winding. The coils are wound around the core, and the voltage is induced in the secondary winding through electromagnetic induction. Cooling Systems: Power transformers…
Dry Type Transformers
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Transformer AccessoriesCustomized transformer accessories for best price and fast worldwide delivery Accessories used in power transmission and distribution systems alongside transformers are crucial for ensuring safe and efficient operation. Here are various types of transformer accessories commonly employed in power systems: Buchholz Relay: Purpose: Detects internal faults, such as insulation breakdown or arcing, by monitoring the gas content in the transformer oil. Location: Installed in the oil conservator tank of oil-immersed transformers. Pressure Relief Devices: Purpose: Protects transformers from internal overpressure during faults by releasing excess gas or oil. Types: Pressure relief valves, rupture discs, and pressure relief dampers. Conservator Tank: Purpose: Allows for the expansion and contraction of transformer oil with temperature changes, maintaining a constant oil level. Oil Level Indicator: Purpose: Monitors the oil level in the conservator tank, ensuring proper cooling and insulation. Silica Gel Breather: Purpose: Protects transformer oil from moisture by absorbing and desiccating the air entering the conservator tank. Tap Changer: Purpose: Permits adjustment of the transformer’s output voltage to compensate for variations in the power system. Types: On-load tap changers (OLTC) or off-circuit tap changers (OCTC). Cooling Systems: Purpose: Maintains the transformer’s temperature within acceptable limits. Types: Radiators, fans, cooling fins for air-cooled transformers;…
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Cable JointsCustomized cable joints for best price and fast worldwide delivery Cable joints are used to connect two or more electrical cables together. These joints are crucial in electrical installations to ensure a continuous and reliable flow of electricity. Cable joints are typically employed in various settings, including power distribution networks, industrial facilities, construction projects, and telecommunications systems. The key purposes of cable joints include: Connectivity: Cable joints provide a secure and electrically sound connection between two or more cables. This ensures that electrical power can flow smoothly through the joint without interruptions. Insulation: Cable joints often include insulation materials to protect the electrical connections from environmental factors such as moisture, dust, and other contaminants. Proper insulation helps prevent short circuits and ensures the longevity of the joint. Mechanical Protection: Cable joints offer mechanical protection to the connected cables, shielding them from physical damage, bending, and other stresses. This is particularly important in environments where cables may be exposed to rough conditions. Flexibility: Cable joints allow for flexibility in the layout of electrical systems. They enable changes in direction, branching, and extensions to the existing cable infrastructure without the need for complete replacement. Low Voltage Cable Joints: Used in residential and…
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Surge ArrestersSurge Arresters for power transmission and distribution Surge arresters play a crucial role in protecting power transmission and distribution systems from voltage surges or transients. These surges can result from various factors, such as lightning strikes, switching operations, and other electrical disturbances. Surge arresters are designed to divert excess voltage to the ground and prevent damage to sensitive equipment and components in the power network. Here are some key points about surge arresters in power transmission and distribution: Purpose: Voltage Protection: Surge arresters protect equipment and components from high voltage spikes that can occur during transient events. System Reliability: By preventing damage to transformers, circuit breakers, and other devices, surge arresters contribute to the overall reliability of the power system. Types of Surge Arresters: Station-Class Arrester: Used in substations for high-voltage protection. Intermediate-Class Arrester: Used on overhead distribution lines. Distribution-Class Arrester: Installed on distribution systems for low-voltage protection. Working Principle: Surge arresters are typically nonlinear devices with a high resistance under normal operating conditions. When a surge occurs, the arrester’s resistance decreases, providing a low-impedance path for the surge to be safely conducted to the ground. Metal-Oxide Varistor (MOV) Technology: Most modern surge arresters use Metal-Oxide Varistors (MOVs) as their…
Porcelain Surge Arresters
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Surge Arrester Accessories
DisconnectorsDisconnectors for power transmission and distribution Disconnectors, also known as disconnect switches or isolators, are crucial components in power transmission and distribution systems. Their primary function is to provide a visible break in the electrical circuit, allowing operators to safely isolate or disconnect a section of the power network for maintenance, repair, or other operational reasons. Disconnectors are not designed for interrupting current under load conditions, unlike circuit breakers which are specifically designed for that purpose. Here are some key points about disconnectors in power transmission and distribution: Purpose: Isolation: Disconnectors are used to physically disconnect parts of the power network for maintenance, repair, or when needed for safety reasons. Visible Break: They provide a visible break in the circuit, allowing personnel to see that the circuit is de-energized. Types of Disconnectors: Load Break Disconnectors: Designed to operate under load conditions and interrupt small currents. They are commonly used in distribution networks. Non-Load Break Disconnectors: Intended for use only when the circuit is de-energized. They are typically used in transmission lines and substations. Operating Mechanisms: Manual Disconnectors: Operated by hand, either directly or through a mechanical linkage. Motorized Disconnectors: Operated by an electric motor for remote or automated operation. Hydraulic/Pneumatic…
Load Break Disconnectors
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Conductors
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Bronze ConductorsCustomized bronze conductor for best price and fast worldwide delivery Bronze Conductors Bz II Bare Hard Drawn with DIN 48201: Technical Advantages and Railway Electrification Overhead Power Lines (Catenary Wires) Bronze Conductors Bz II Bare Hard Drawn, produced according to the DIN 48201 standard, are widely used in railway electrification systems, particularly for overhead power lines such as catenary wires. These conductors combine high mechanical strength, excellent corrosion resistance, and moderate electrical conductivity, making them ideal for demanding outdoor environments and high-stress applications. This detailed explanation covers: Material composition and technical advantages of Bz II Bare Hard Drawn Bronze Conductors, as per DIN 48201. Railway electrification examples, with a focus on their application as catenary wires in overhead line systems. Bz II Bronze Alloy Composition: Bz II refers to a specific phosphor bronze alloy, typically composed of copper (Cu) with around 4-8% tin (Sn) and small amounts of phosphorus (P). This alloy offers a balance between mechanical strength, wear resistance, and moderate conductivity. Tin strengthens the copper matrix, providing superior resistance to corrosion and oxidation while maintaining good electrical properties. Hard Drawn Process: The conductors are subjected to a hard-drawing process, where the material is drawn through a series of…
Aluminium Wires
Contact WiresCustomized contact wires for best price and fast worldwide delivery Contact wires, also known as overhead contact wires, catenary wires, or trolley wires, are crucial in powering electric railways, trams, and trolleybuses. These wires transfer electrical energy from the overhead system to the vehicle’s pantograph or trolley pole. The material and design of contact wires vary depending on application requirements such as speed, power demand, wear resistance, and mechanical properties. In Europe and other regions, the key standards governing these wires are from IEC, EN, ETP, and UNI. Detailed Types of Contact Wires for Railways, Trams, and Trolley-Buses: Copper (Cu) Contact Wires: Hard-Drawn Copper (HD-Cu) Wires Material: Pure electrolytic copper. Properties: Tensile Strength: Moderate (~200–400 MPa). Electrical Conductivity: Excellent (~58 MS/m or 100% IACS). Wear Resistance: Moderate. Advantages: High electrical conductivity ensures efficient power transmission. Good corrosion resistance. Economical for systems with lower mechanical stress. Disadvantages Lower tensile strength and wear resistance than alloyed contact wires. Applications: Commonly used in trolleybuses and urban tram systems where speed and mechanical wear are not critical factors. Standards: IEC 60888: Defines hard-drawn copper wires for electric traction. EN 50149: European standard covering copper and copper-alloy contact wires. Silver-Bearing Copper (Cu-Ag) Wires: Material: Copper…
Cables
Aluminium CablesCustomized aluminum cable for best price and fast worldwide delivery According to IEC VDE DIN ANSI ISO IEEE standards, aluminum cable is of the following type (Type), construction (Structure) and features high voltage, medium voltage, low voltage, manual and label, indoor use, outdoor use, wet weather conditions, antistatic, tested, electrostatic, certified, adjustable, insulated, insulating, composite, oil resistant, high quality. Aluminum cable and safe working environment To ensure a safe working environment, use aluminum cable in e-mobility, high voltage substation, medium voltage substation, low voltage substation, overhead power line, transformer substation, high voltage switchgear, medium voltage switchgear, low voltage switchgear, railway, subway, tramway, solar panels, hybrid car, batteries, cable, electrical sector, power plant, production, transport, energy transmission, energy distribution. Buy online aluminum cable save a lot of time and money As a electrician, procurement, sales engineer, bidding engineer, design engineer, project manager, commissioning engineer, service engineer, operations engineer, safety manager, quality manager, electrical engineer, electrical engineer, automotive engineer, chemical engineer, electronics engineer, engineering department manager, environmental engineer, health and safety engineer, hydraulics engineer, industrial engineer, installation, repair, department manager, logistics engineer, materials engineer, mechanical engineer, planning engineer, production engineer, professional engineer, structural engineer, technical department manager, electrician welder, craftsman construction worker,…
Copper Cables
Cable Accessories
BusbarsBusbars for power transmission and distribution Busbars play a crucial role in power transmission and distribution systems by providing a conductive path for the flow of electrical energy. They are essentially metal bars or conductors that carry electric current within a switchboard, substation, or any other electrical installation. Busbars are used to connect various components such as circuit breakers, transformers, and other devices in the power distribution network. Here are some key aspects of busbars in power transmission and distribution: Material: Busbars are typically made from highly conductive materials such as copper or aluminum. Copper is an excellent conductor and is often preferred for high-current applications due to its superior conductivity. Aluminum, while not as conductive as copper, is lighter and less expensive, making it suitable for applications with lower current requirements. Shape and Configuration: Busbars come in various shapes and configurations, depending on the specific requirements of the application. Common shapes include flat bars, rectangular bars, or tubes. The configuration can be a single busbar or a system of multiple bars arranged in a specific pattern, such as a busbar trunking system. Busbar Trunking Systems: Busbar trunking systems are used in large-scale power distribution networks. These systems consist of…
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Structures
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PhotovoltaicsPhotovoltaics for power transmission and distribution Photovoltaic Power Generation Photovoltaic Effect: When sunlight (photons) strikes a semiconductor material (usually silicon), it excites electrons, generating a flow of electric current. This direct conversion of light into electricity is known as the photovoltaic effect. Components: PV Cells: The fundamental units of a PV system, typically made from silicon, which convert sunlight directly into electricity. Each cell consists of layers of semiconductor materials that create an electric field. Modules and Arrays: PV Modules: Collections of PV cells connected in series and parallel, encapsulated to form a solar panel. PV Arrays: Multiple modules connected together to increase power output for large-scale applications. Types of PV Cells Monocrystalline Silicon Cells: Made from a single crystal structure, offering high efficiency (15-20%) and a long lifespan, but they are more expensive due to the complex manufacturing process. Polycrystalline Silicon Cells: Made from silicon crystals melted together, offering slightly lower efficiency (13-16%) but at a reduced cost. Thin-Film Solar Cells: Created by depositing thin layers of photovoltaic materials (like cadmium telluride or amorphous silicon) onto a substrate. They are less efficient (around 10-12%) but more flexible and cheaper. Emerging Technologies: Includes perovskite solar cells, organic PV cells, and…
Solar Panels
Photovoltaics Systems
Photovoltaics AccessoriesCustomized photovoltaics accessory for best price and fast worldwide delivery Photovoltaics accessories encompass a range of components that support the operation, efficiency, and safety of solar power systems. These accessories are crucial in optimizing the performance of photovoltaic (PV) panels and ensuring their integration into various applications. Here’s a detailed explanation of some key photovoltaics accessories, their technical advantages, and examples of their applications: Key Photovoltaics Accessories Inverters: Convert the direct current (DC) generated by PV panels into alternating current (AC), which is the standard form of electricity for most household and commercial appliances. Modern inverters have high conversion efficiencies, often exceeding 98%. Grid Synchronization: They synchronize the generated power with the grid’s voltage and frequency. MPPT (Maximum Power Point Tracking): Ensures that the PV system operates at the optimal power output by continuously adjusting the electrical operating point of the modules. Applications: Residential solar power systems, commercial solar installations, and utility-scale solar farms. Charge Controllers: Regulate the voltage and current coming from the PV panels to the batteries to prevent overcharging and overdischarging. Battery Protection: Extends battery life by preventing overcharging and deep discharging. MPPT: Similar to inverters, many charge controllers also have MPPT to maximize energy harvest. Applications:…
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Safety & Power
Copper Low Voltage Cable / NYM / RM / PVC / PVC / 0.3 kV / 0.5 kV / 25 mm² / Ø 20 mm / 2

Copper Low Voltage Cable / NYM / RM / PVC / PVC / 0.3 kV / 0.5 kV / 25 mm² / Ø 20 mm / 2

€5,72 – €5,96 (EXW)

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2064121 Category: Tags: ,
Delivery time: 3 Week(s)

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Description

 Country of origin  Romania
 Nominal voltage U0  0.3 kV
 Nominal voltage U  0.5 kV
 Conductor resistance  0.727 Ω / km
 Conductor cross-section S  25 mm²
 Conductor diameter S  20 mm
 Bending radius  240 mm
 Conductor class  2
 Number of cores  2
 Type  NYM 300/500 V
 Type  2 x 25 RM
 Core type  RM
 Core form  Round
 Core form  Stranded
 Core insulation  PVC
 Flame retardant
  X
 Indoor use  X
 Outdoor use  X
 Core material  Copper
 Outer sheath material  Polyvinyl chloride PVC
 Outer sheath colour  Gray
 Temperature  -30 …+70 °C
 Weight  844 kg / km
 Standard  DIN VDE 0250-204
 Standard  IEC 60228
 Standard  IEC 60332-1-2

Additional information

Weight 3 kg