Low voltage distribution system comprehensive monitoring current/voltage/temperature - CT power transformer open type

As a professional provider of IoT data acquisition solutions and an expert in industrial IoT data acquisition, the editor of Shanghai Data Acquisition IOT Technology Co., Ltd， (daq-iot) hereby presents the following introduction, and sincerely welcomes discussions and exchanges. Supported Communication Interfaces: CAN, RS485, Mbus, 4–20mA, Profibus, CC-Link, HART, digital I/O, etc. Industrial Protocols: Modbus RTU/TCP, HJ212, IEC104, DLT645, DLMS, IEC61850, MQTT, etc. Mail:export@daq-iot.com

As a professional provider of IoT, Data Acquisition, solution, and an expert (professional account) in the industrial Data Acquisition field, Daq IoT, the editor of IoT, would like to introduce the following content and sincerely welcome everyone to discuss and exchange ideas.

As a professional internet of things data acquisition solutions provider, industrial data acquisition experts (professional households), digital internet of things editor daq - iot here to do the following introduction, and sincerely welcome everyone to discuss and exchange.

mutual inductor

Main function: Three in one monitoring of current, voltage, and temperature, supporting fault recording and harmonic measurement

Applicable scenario: Comprehensive monitoring of 0.4kV low-voltage distribution system (current, voltage, temperature) | Fully functional, supporting * * voltage measurement * *, suitable for intelligent transformation and monitoring of low-voltage distribution system * ***

Installation object: Comprehensive monitoring of low-voltage distribution system, suitable for indoor and outdoor distribution boxes, cable branch boxes

Do you need grounding? Zero potential point * * (voltage measurement)

Dual power supply: rechargeable lithium battery+CT power supply (power frequency electromagnetic field), (minimum starting current 1.3A)

Applicable voltage level 220/380 (applicable under 35kV)

Voltage measurement range 0-400V (can be extended to medium voltage, specific to be determined, needs to be matched with the circuit, not applicable to armored cables and multi-core cables)

The voltage measurement accuracy is ± 0.5%, and the measurement error within the reading range of 0-400V does not exceed ± 0.5% of the current reading value.

Current measurement range 0-720A (customizable)

The current measurement accuracy is ± 0.5% of Reading (within the range of 1% to 120% of rated current), and the overall electrical energy accuracy meets the requirements GB/T 17215.321 Level 1 requires a measurement error not exceeding ± 0.5% of the current reading value.

The phase measurement error is within the range of power factor 0.5L~1~0.5C, and the power factor measurement error is ≤ 0.0005

Temperature measurement range -40~100 ℃ (needs to be adjusted to match the circuit and structure)

Temperature measurement accuracy ± 1 ℃

Working temperature -40~85 ℃

Temperature data update interval of 1 second (wireless transmission interval is expected to be longer, or dynamically adjusted)

Protection level IP67 according to standards (such asIEC 60529）

Dimensions 89.3mm (L) * 56mm (W) * 74.5mm (H)

The maximum diameter of the opening is 36mm

Installation method: Open mouth, buckle fixed

Measurement principle Current: Electromagnetic induction Voltage: Capacitive voltage division

Output signal of the whole machine to the outside: Star Flash

Communication and configuration star flash, wireless CT+star flash concentrator

Communication method: Star Flash (transmission distance of 100 meters)+5G+wired+Bluetooth 5.0+RS485/broadband carrier

Current range Rated current range: such as 200A, programmable switching, accuracy within the range meets ± 0.5% of Reading

Power/electric energy accuracy: active power ± 1.0%, reactive power ± 1.0%, electric energy level 1

/Level 2“

Power/Power/Electric Energy Accuracy Test Range "Voltage Range: 80%~120% Rated Voltage (e.g. 176V~456V)

Current range: 1%~200% rated current (or at least 5%~150%)

Power factor range: 0.5 lag~1~0.5 lead

Temperature range: -10 ℃~+45 ℃ (or wider)

Frequency range: 50Hz ± 2.5Hz“

Sampling rate ≥ 256 points/cycle (i.e. ≥ 12.8 kHz), supporting fault recording mode.

Insulation withstand voltage level: Power frequency withstand voltage: 3kV (effective value), 1 minute, no breakdown or flashover.

Impulse withstand voltage: 8kV (peak), 1.2/50 µ s waveform. According to the IEC 61869 series standards (transformers) and IEC 61010 (safety of measuring equipment).

EMC (Electromagnetic Compatibility) Level "Immunity (all severity levels III/IV):

• Electrostatic discharge: ± 8kV (contact)/± 15kV (air)

RF radiation: 10V/m (80MHz-6GHz)

Fast transient pulse train: ± 4kV (power/signal port)

Surge: ± 4kV (line to line), ± 6kV (line to ground)

Conducted RF: 10V

• Power frequency magnetic field: 30A/m

Launch: Meets Class A restrictions.

GB/T 21419-2021: EMC Requirements for Transformers and Reactors.

The test needs to cover the GB/T 17626 series (such as electrostatic ± 8kV/air ± 15kV, surge ± 4kV, etc.). According to IEC 61000-6-2 (industrial environment immunity) and IEC 61000-6-4 (industrial environment emission). Grade III/IV is suitable for industrial and power station environments, ensuring stable operation under strong electromagnetic interference.

Weight ≤ 800g

Installation torque or clamping force open type buckle: Installation torque is 2.5 N · m ± 0.2 N · m, and ensure that the clamping force is ≥ 50 N.

Battery specifications and lifespan "Rechargeable lithium battery:

• Capacity ≥ 5000mAh (3.6V)

• Cycle life ≥ 1000 times (up to 80% of initial capacity)

Pure battery life (standard mode): ≥ 5 years

• Operating temperature range: -40 ℃ to+85 ℃“

If configured, the specifications and lifespan of supercapacitors require:

Capacity ≥ 10F, withstand voltage ≥ 5.5V

• Cycle life ≥ 500000 times

• Working temperature: -40 ℃ to+85 ℃

• Used to maintain high current power supply during fault recording or communication transients. "

Mean Time Between Failures (MTBF) ≥ 300000 hours (approximately 34.2 years) calculated according to IEC 61709 or MIL-HDBK-217F standards.

Calibration cycle: First calibration cycle: ≥ 3 years

Warranty period for the entire machine: ≥ 5 years

Compliance and Certification "China CCC Certification GB/T 14048 Standard

GB/T 20840.10-2025&GB/T 20840.11-2025: The latest national standards for low-power passive current/voltage transformers are the fundamental basis for design and testing.

GB/T 20840.1-2010: General Technical Requirements for Transformers.

The report must prove that the product meets all the requirements for level 1 or level 2 electric energy meters in relevant standards such as GB/T 17215.211 (General Requirements for Electric Energy Meters) and GB/T 17215.321 (Level 1 Static Active Energy Meters). The report should include electrical energy error test data at all load points and all power factor points.

Pass the special testing and supplier qualification review of State Grid/Southern Grid Corporation, and enter it into their procurement catalog.

CE Certification(EU): Includes LVD (Low Voltage Directive) andEMC DirectiveEspecially EN 61000-6-2/4 and others. "

Software Upgrade and Support "1. Supports remote Firmware wireless upgrade (FOTA).

2. Provide complete local configuration and diagnostic software tools.

3. Provide software/Firmware support and security updates for no less than 10 years from the discontinuation of the product. "

Packaging and Transportation Requirements "1. Packaging: Special engineering plastic box with IP67 protection level, lined with shock-absorbing and anti-static materials.

2. Transportation testing standards: Tested according to ISTA-2A or 3A standards (simulating harsh transportation environments).

3. Storage: Environmental temperature -40 ℃~+85 ℃, humidity ≤ 95%. "

Key component brands or specifications require star flash modules

Intellectual property and patent application intellectual property are independently owned by Xingshan Haichen Company. Within 15 days of making a request, the following complete materials shall be provided: core documents of technical disclosure and technical process documents:

The acceptance quality limit (LQ) of the incoming inspection batch is 0.65 for sampling inspection. The acceptance quality limit (AQL) of any delivery batch shall not be lower than 0.65 (corresponding to the general inspection level II in GB/T 2828.1-2012, normal inspection once sampling plan).

Delivery defect rate (DPPM) ≤ 50 PPM. The defect rate discovered during IQC inspection should be ≤ 50 PPM. The calculation method is: (total number of defective products rejected by monthly IQC/total number of delivered products per month) x 1000000.

Within 180 days after the delivery of early failure rate products, the failure rate should be ≤ 100 PPM. Within 180 days from the completion of the first installation and use of the production line, the failure rate under normal use conditions should be ≤ 100 PPM. The calculation method is: (total number of confirmed faulty products during the period/total number of products used online during the same period) x 1000000.