Introduction
The MR iLEC current transformer (wound-type current transformer) is a low-voltage electrical measurement device specialized for the ILEC brand (Vietnam). It is used to monitor and convert high primary currents into a safe secondary current of 5A (or 1A) for metering and protection devices.
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Introduction
Biến dòng RCT ILEC (Ring type Current Transformer) là dòng biến dòng hạ thế dạng tròn, vỏ đúc tích hợp đế sắt dùng trong hệ thống điện công nghiệp. Thiết bị này có chức năng chuyển đổi các dòng điện xoay chiều cực lớn (từ 50A đến 6000A) xuống các mức dòng tiêu chuẩn an toàn là 5A hoặc 1A để kết nối với các thiết bị đo đếm (công tơ, ampe kế) hoặc bảo vệ (rơ-le).Đặc điểm nổi bậtThiết kế: Dạng tròn có đế sắt, thiết kế nhỏ gọn, chắc chắn, giúp việc lắp đặt trong các tủ điện công nghiệp trở nên dễ dàng và tiết kiệm không gian.Chất liệu: Vỏ hộp đúc hoặc nhựa cách điện tốt, chịu nhiệt cao và đảm bảo an toàn vận hành.Độ chính xác: Cấp chính xác cao (thường là CL.1 hoặc CL.0.5), dung lượng định mức linh hoạt.
Biến dòng tròn chế tạo nhỏ gọn, kinh tế, tỉ số từ 50/5A đến 6000/5A. Có 6 cỡ RCT-35, RCT-45, RCT-65, RCT-90, RCT-110, RCT-130
Tài liệu kỹ thuật biến dòng RCT iLEC
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Introduction
TPCT iLEC Three- Phase Current TransformerIt is a specialized 3-core, integrated housing device for measuring and monitoring alternating current simultaneously for all three phases.This device is optimally designed for direct installation on MCCBs, saving space in the electrical cabinet .
Integrated design: Combines three single current transformers into a compact housing, reducing connection and adjustment time.Easy to install: Can be mounted directly on the busbar or connected to the top/bottom of the MCCB.High durability: The casing is made of flame-retardant plastic or high-grade epoxy molding, offering excellent heat resistance and safe operation in industrial environments.Versatile applications: Suitable for distribution panel systems, BMS, PLC, and metering stations.
Introduction of Three Phases CT
The TPCT series current transformer has been specially designed to fix directly with MCCB both line side and load side. So it will give greater speed of installation and optimisation of space.
TPCT GENERAL SPECIFICATIONS
- Rated Frequency: 50/60Hz
- Rated insulation voltage: 3kV AC. (1 min)
- Rated short-time thermal current (Ith): 60In / 1s
- Rated dynamic current (Idyn): 2.5Ith
- Rated voltage (Un): 0.66kV AC
- Continuous current (Id): 1.2In
- Operating temperature: -10°C~50°C
- Housing self-extinguishing: class V0
- Primary current: From 50 to 600A
- Secondary current: 1A and 5A
- Current Accuracy: CL3.0, CL1.0
- Phase Angle Accuracy: CL3.0 and CL1.0
- Environment: Indoor
- Mounting: DIN rail, bus bar or base mounting
- Sizes: TPCT-103 (100A), TPCT-203 (200A), TPCT-403(400A)
PRODUCT ORDERING CODE STRUCTURE OF TPCT
TPCT OVERAL DIMENSIONS
TPCT Application Examples
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Introduction
Features
- Simple, compact, and robust design.
- High-quality ABS plastic housing, flame-retardant.
- Measures and monitors electrical power supplied to the load.
- Measures high-range AC current.
- Accurate, durable, and safe operation.
- Stable performance in high-temperature environments.
- Long service life and high efficiency.
Applications
- Used in electrical monitoring systems and power distribution stations.
- Applied in control and power distribution cabinets in factories and industrial plants.
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Introduction
iLEC ZCT (Zero Phase Current Transformer) or Core Balance Current Transformer (CBCT) is a specialized device used to detect leakage current or ground fault current by measuring the vector sum of three-phase currents.
1. Operating principleIn a normal electrical system, the total vector of the three-phase current is equal to 0.\(I_A + I_B + I_C = 0\)When a leakage current or ground fault occurs, an excess current (zero-sequence current) appears . The ZCT will detect this current and send a signal to the protective relay (EFR/ELR) to interrupt the circuit, protecting equipment and people.
2. Structure & ShapeShape: Typically toroidal (round) in design, the system's phase/neutral wire is threaded through the circular hole in the center of the sensor.Characteristics: Unlike conventional CTs, it does not have a fixed current transformation ratio but operates based on the principle of direct magnetic induction of the total current flowing through the center.
3. Main functionsLeakage protection: Prevents the risk of electric shock when people accidentally touch equipment with a faulty electrical connection.Ground fault protection: Detects and disconnects the system in the event of a phase short circuit to the equipment casing, protecting cables and equipment from fire and explosion.
4. Practical applicationsCommonly installed in industrial electrical cabinets and main distribution boards (MSBs), in combination with ground fault and leakage protection relays (such as Mikro, Schneider, Omron relays, etc.).To learn more about the detailed operation or to select the appropriate leakage current range for your system, you can refer to the manufacturer's documentation for the Mikro ZCT zero-sequence current transformer to choose the most accurate measuring devices.
What is a Core Balance Current Transformer
Core Balance Current Transformer (CBCT) or a Zero sequence Current Transformer (ZCT) or Zero-Phase Current Transformer (ZPC) is a special current transformer used to detect the zero sequence current during faults (such as Earth Leakage or ground fault) that generates an unbalanced in the electric system.
CBCT / ZCT / ZPC working principle
In the ideal condition, No leakage current. So the sum of incoming current Ia + Ib + Ic + in = -ie =0
Hence, there will not be any flux generated in the CBCT core, so the secondary current in the secondary winding (S1 - S2) is zero
In case There is a leakage current, Ia + Ib + Ic + in = -ie > 0. This leakage current will generate a flux in the core. The flux will generate the secondary current in the secondary winding. The leakage monitoring equpment or earth leakage / earth fault relay will detect this current. Depending on the amplitude of the earth lekage current, the protection relay will send the alarm signal or trip signal to the switchgear
CBCT's Technical parameters
CBCT output signal and ratio
- Output signal: mA or mV (AC)
- Ratio: 50/1; 100/1; 200/1; 500/1 and 1000/1
CBCT Minimum sensing current
The minimum sensing current is the smallest primary current that can be detected by the CT, smaller value is better. Typical value is 10mA
Most of manufacturer just sell their Earth Leakage relay with their CBCT (ZCT, ZPC) without public output signal and ratio. The reason is that they want their device to work with the best compatibility and the best efficiency. Because their main product is leakage current protection relays, their zero sequence current transformer range is not diverse in shape and size.
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