TKEL3-125PV residual current protective Circuit-breaker (distributed photovoltaic protective switch)-Taikai Electric Appliance-Dedicated to low-voltage equipment

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TKEL3-125PV residual current protective Circuit-breaker (distributed photovoltaic protective switch)

The TTKEL3-125PV residual current protection circuit breaker (hereinafter referred to as circuit breaker) is a new generation product newly developed to meet the various requirements of the ubiquitous power internet of things for low-voltage power distribution. It integrates protection, measurement, remote control, communication, and fire warning monitoring functions. This product is suitable for AC 50Hz, rated voltage AC400V and below, three-phase four-wire neutral point directly grounded low-voltage power distribution lines. In addition to overload, short circuit, leakage, overvoltage, and undervoltage protection functions, it can also achieve high-precision metering of electrical parameters such as current, voltage, power factor, and temperature, providing data support for the power supply and load response of the entire area, truly realizing intelligent power distribution of the Internet of Things. This circuit breaker can also realize the protection of grid-connected photovoltaic power generation, passive anti-island protection function, and is especially suitable for use as a protection switch for distributed photovoltaic power generation systems.

Belonging Category:

Internet of Things Circuit Breaker

Keywords:

TKEL3-125PV residual current protective Circuit-breaker (distributed photovoltaic protective switch)

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Product Details

Product Introduction

The TKEL3-125PV residual current protective Circuit-breaker (hereinafter referred to as Circuit-breaker) is a new generation product independently developed to meet the various requirements of the ubiquitous power Internet of Things for low-voltage power distribution. It integrates protection, measurement, remote control, communication, and fire pre-warning monitoring functions. This product is suitable for AC 50Hz, rated voltage AC400V and below, three-phase four-wire low-voltage power distribution lines with directly grounded neutral points. In addition to overload, short-circuit, leakage, overvoltage, and undervoltage protection functions, it can also achieve high-precision measurement of power parameters such as current, voltage, power factor, and temperature, providing data support for the entire area's power supply and load response, truly realizing intelligent power distribution of the Internet of Things. This Circuit-breaker can also achieve energized grid connection protection for photovoltaic power generation, passive anti-islanding protection function, and is especially suitable for use as a protective switch for distributed photovoltaic power generation systems.

Standards Compliance

GB/T 14048.1 Low-voltage switchgear and controlgear - Part 1: General rules

GB/T 14048.2 Low-voltage switchgear and controlgear - Part 2: Circuit-breakers

GB/T 32902 Residual current protective circuit-breaker (CBAR) with automatic reclosing function

Technical Specification for Distributed Photovoltaic Protection Switch

Environmental Verification

GB/T 20645 Special environmental conditions - Technical requirements for low-voltage electrical appliances for plateau use

GB/T 2423.1 Electrical and electronic products - Environmental testing - Part 2: Test methods - Test A: Cold

GB/T 2423.2 Electrical and electronic products - Environmental testing - Part 2: Test methods - Test B: High temperature

GB/T 2423.4 Electrical and electronic products - Environmental testing - Part 2: Test methods - Test Db: Damp heat, cyclic (12h+12h cycle)

GB/T 2423.18 Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)

Standard working conditions

Normal operating ambient temperature: -10℃～+45℃, limit ambient temperature -40℃～+70℃;

Installation altitude: Not exceeding 2000m (consultation with the manufacturer is required for high-altitude areas);

At a maximum temperature of +40℃, the relative humidity of the air shall not exceed 50%. At lower temperatures, higher relative humidity is permissible, e.g., 90% at 20℃. Special measures should be taken for occasional condensation due to temperature changes;

Pollution degree: Grade 3;

Enclosure protection level: IP20;

Installation category: Category Ⅲ;

The vertical inclination of the installation shall not exceed 5°;

Transportation and storage conditions: Not lower than -40℃, not higher than 70℃;

Product Features

Complete Functions The Circuit-breaker has complete protection functions, including overload long-delay, short-circuit instantaneous/short-delay, residual current, overvoltage/undervoltage, terminal and contact overheating, and power generation current monitoring. The Circuit-breaker integrates an electric operating mechanism and an intelligent control chip, with manual/electric/remote operation and leakage automatic reclosing (can be turned off) functions.

Convenient Communication The Circuit-breaker has an RS485 communication port and a pluggable HPLC dual-mode communication module, which can match various communication protocols: MODBUS-RTU, DL/T 645, DL/T 698, etc. It can communicate with intelligent distribution transformer terminals, host computers, etc., and realize communication self-networking through uplink carrier communication and downlink low-power wireless communication. It has functions for recording and querying various historical stored data.

Passive Islanding Protection When the power grid is off, without relying on the inverter's own islanding protection, it cuts off the connection between the photovoltaic power generation system and the low-voltage power distribution network. It detects whether the system is in an islanding state by detecting the amplitude, frequency, phase, and harmonic content of the voltage at the inverter output end, i.e., the common point voltage.

Precise Measurement It has a Chinese LCD display unit for intuitive and clear parameter setting. It reads various power parameters and fault information online. The Circuit-breaker monitors various power parameters of the power grid system in real time. The current and voltage measurement accuracy is 0.5s level, and the active power, reactive power, and frequency measurement accuracy is 1.0 level, providing data support for the entire area's power supply and load response.

Safe and Reliable The intelligent controller embeds independent protection, measurement, and communication microprocessor modules to improve work reliability. It has functional current transformers: metering current transformers, protection current transformers, and power supply current transformers, providing more reliable electrical signals for the chip. It has an independent power supply module, ensuring that the circuit operates normally under no-load conditions.

Energized Grid Connection Protection for Photovoltaic Power Generation It simultaneously detects the input and output voltages of the Circuit-breaker. When the Circuit-breaker is in the open state, it prohibits the photovoltaic inverter from energizing the grid. Only when the grid-side voltage and frequency are normal and there is no output voltage on the photovoltaic side is closing allowed.

Model and Meaning

TK	EL	3	-	125	PV	/	3P+N	/	125A
Enterprise code	Product Category	Design SN		frame size	Application Code		Product Pole Number		Rated current
Shandong Taikai Electric Co., Ltd.	Residual Current Protection Circuit-breaker (automatic reclosing)	3		125	PV: Distributed PV Protective Switch		3P+N		50A 63A 80A 100A 125A

Selection Example:

TKEL3-125PV/3P+N 63A 100 units;

Indicates: Order TKEL3 series, frame size Rated current is 125A, Rated current is 63A, Pole number is 3P+N residual current protection Circuit-breaker (distributed PV protective switch) 100 units.

Main Technical Parameters

Item	Main technical parameters
Product Specifications	TKEL3-125PV
Rated working current In(A)	125A (50~125A continuously adjustable)
Long-delay setting current Ir(A)	50~125A continuously adjustable	Long-delay setting time tr(s)	3~18s adjustable
Rated voltage Un(V)	AC400V 50Hz
Pole number	3P+N、4P
Rated residual operating current IΔn	50/100/150/200/300/400/500/600/800mA+OFF graded adjustable, automatic tracking
Maximum non-actuation time	0.06s、0.1s、0.2s adjustable
Rated insulation voltage Ui	AC1000V
Rated ultimate breaking capacity Icu	50kA
Rated operating breaking capacity Ics	35kA
Rated short-time withstand current Icw	3kA 1s
Reclosing time	20~60s (manual closing is not subject to time interval restrictions)
Short-circuit short-delay current Isd	2~10Ir graded adjustable	Short-delay operating time tsd	0.1~1.0s adjustable
Short-circuit instantaneous setting current Ii	4~14Ir graded adjustable
Measurement accuracy	Current: 0.05In≤I≤1.2In error ≤±0.5% Voltage: 0.35Un≤U≤1.3Un error ≤±0.5% Active power, reactive power: 0.05In≤I≤1.2In error ≤±1% (power factor 1.0) Forward and reverse energy: 0.05In≤I≤1.2In error ≤±1% (power factor 1.0)