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Internet of Things (IoT) dedicated circuit breaker, mainly developed for the various needs of the ubiquitous power internet of things for low-voltage power distribution, is a new product integrating protection, measurement, communication, and monitoring functions. The TKDM5E series intelligent moulded-case circuit breaker (MCCB) is suitable for AC 50Hz circuits with a rated insulation voltage of 1000V, rated voltage AC415V and below, and rated working current 800A and below. It is generally used for power distribution to distribute electrical energy and protect lines and power equipment from damage caused by overloads, short circuits, and undervoltage faults. It can also be used in places where lines are infrequently switched and motors are infrequently started. The TKEL3 series circuit breaker is suitable for AC 50Hz circuits with a rated insulation voltage of 800V, rated voltage AC400V and below, and rated working current 800A and below. This product is suitable for low-voltage power grids with three-phase four-wire neutral points directly grounded, providing indirect contact protection against electric shock hazards to people, and also providing protection for the grounding, current, voltage, and frequency of lines or electrical equipment.

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Product Details

Smart Internet of Things Circuit-breaker Series

TKDM5E Series Intelligent Moulded-case Circuit Breaker (MCCB)

TKEL3 Series Residual Current Protective Circuit Breaker

Product Overview

Internet of Things dedicated circuit breaker, mainly developed for various needs of ubiquitous power Internet of Things for low-voltage power distribution, is a new product integrating protection, measurement, communication and monitoring functions.

The TKDM5E series intelligent moulded-case circuit breaker (MCCB) is suitable for AC 50Hz circuits with a rated insulation voltage of 1000V, rated voltage AC415V and below, and rated working current 800A and below. It is generally used for power distribution, protecting lines and power equipment from damage caused by overloads, short circuits, and undervoltage faults. It can also be used in places where lines are infrequently switched and motors are infrequently started.

The TKEL3 series circuit breaker is suitable for AC 50Hz circuits with a rated insulation voltage of 800V, rated voltage AC400V and below, and rated working current 800A and below. This product is suitable for low-voltage power grids with three-phase four-wire neutral point directly grounded, providing indirect contact protection against electric shock hazards to human bodies, and also providing protection for the grounding, current, voltage, and frequency of lines or electrical equipment.

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 14048.4 Low-voltage switchgear and controlgear Part 4-1: Contactors and motor starters Electromechanical contactors and motor starters

● GB/T 14048.5 Low-voltage switchgear and controlgear Part 5-1: Control circuit devices and switching elements Electromechanical control circuit devices

Environmental Verification

● GB/T 14597 Climatic environmental conditions for electrical products at different altitudes

● GB/T 20645 Technical requirements for low-voltage electrical appliances for use in special environments and plateaus

● GB/T 2423.1 Environmental testing of electrical and electronic products Part 2: Test methods Test A: Low temperature

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

● GB/T 2423.18 Environmental testing of electrical and electronic products Part 2: Test methods Test Kb: Salt mist, cyclic (sodium chloride solution)

Standard Working Conditions

● Ambient operating temperature: Normal -5°℃～+40°℃, Extreme -25°℃～+70°C;

● Altitude of installation location: Not exceeding 5000m (derating required for altitudes exceeding 2000m);

● Pollution degree: Grade 3

● Circuit breaker protection level IP20, protection level IP40 with terminal cover, installation category: Class Ⅲ

● The vertical inclination of installation shall not exceed 5°

● Transportation and storage conditions: Not lower than -40°℃, not higher than 80°℃

Intelligent Substation System Architecture

Low-voltage Electrical Appliance System

TKDW5E Series Moulded-case Circuit Breaker (MCCB)

Model and Meaning

TKD

250

300

Serial Number	Description	Model Meaning
1	Enterprise code	TKD: Shandong Taikai Electrical Appliance Co., Ltd.
2	Product Category	M: Moulded-case circuit breaker (MCCB)
3	Design SN	5
4	Trip unit code	E: Electronic trip unit
5	Frame size	250、400、630、800
6	Operation mode code	No code: Direct manual operation P: Electric operating mechanism Z: Rotary handle operating mechanism
7	Pole number	3: 3 poles 4: 4 poles
8	Internal accessory code	300: No accessories Others see Trip method and internal accessories table
9	Communication protocol code	A: MODBUS-RTU B: DL/T 645 C: DL/T 698

Product Architecture

1 Base

2 Top Cover

3 Operating Mechanism

4 Current Transformers (protection/measurement/power supply current transformers)

5 Intelligent Controller

6 Display Unit

7 Arc Extinguishing Chamber

8 Static Contact

9 Rotating Shaft (dynamic contact)

10 Backup Protection System

Main technical parameters and performance

TKDM5E Circuit Breaker Main technical parameters

Product Model	TKDM5E-250	TKDM5E-400	TKDM5E-630/800
Enclosure Current Inm (A)	250	400	630/800
Setting Current IR (A)	100~250	160~400	250~800
Pole number	3/4	3/4	3/4
Rated Insulation Voltage Ui (V)	AC 1000	AC1000	AC 1000
Rated Impulse Withstand Voltage Uimp (V)	8000	8000	8000
Rated Voltage Ue (V)	AC 400、AC 415V	AC 400、AC 415V	AC 400、AC 415V
Arcing distance(mm)	≤50	≤100	≤100
Rated Ultimate Breaking Capacity Icu (kA)	65	65	75
Rated Operating Breaking Capacity Ics (kA)	50	50	50
Rated Short-Time Withstand Current Icw (kA)	5kA/0.5s	5kA/1s	8kA/1s、10kA/1s
Usage Category	B	B	B

Performance Advantages and Features

Protection, measurement, and communication functions are independently designed

The intelligent circuit incorporates independent protection, measurement, and communication microprocessor modules, improving system stability; it has an independent power supply module, ensuring normal circuit operation even when the circuit breaker is unloaded.

Data Storage Function

It realizes the storage of power parameters such as current, voltage, and power, providing operation and maintenance personnel with corresponding information query and fault judgment.

Display Unit

LCD display: intuitive and clear display, facilitating quick reading of electrical parameters.

Precise Measurement

It has an independent high-precision measurement module to ensure measurement accuracy; the accuracy can reach ±0.5%.

Topology Structure

It can realize upper and lower level relay protection, accurate fault location, selective switching, etc.

Convenient Communication

The circuit breaker has an RS485 port and can match various communication protocols: MODBUS-RTU, DL/T645, DL/T 698, etc. It has low-power wireless communication (Bluetooth) function and can be expanded with infrared communication function and HPLC high-speed carrier function.

Environmental Monitoring

Various sensing sensors can be expanded to provide timely, accurate, and comprehensive feedback on environmental conditions such as temperature and humidity, with temperature protection.

Green and Environmentally Friendly Design

The product follows the EU RoHS standard in product design and production, and complies with environmentally friendly production processes.

TKEL3 Series Residual Current Protective Circuit Breaker

Model and Meaning

TKD

250

3P+N

□

Serial Number	Description	Model Meaning
1	Enterprise code	TK: Shandong Taikai Electrical Appliance Co., Ltd.
2	Product Category	EL: Residual current protection circuit breaker with automatic reclosing function
3	Design SN	3
4	Frame size	125、250、400、630、800
5	Breaking Capacity Code	H: High Breaking Capacity Type
6	Display Type	Y: LCD Screen
7	Pole number	3P+N: The N pole is always connected and does not switch with the other three poles
8	Communication protocol code	A: Modbus-RTU B: DL/T 645 C: DL/T 698
9	Additional Functional Requirements	Ordinary accuracy, 2% accuracy, 0.5% accuracy, HPLC communication, auxiliary contacts, increased capacity or non-increased capacity (only for 630), etc.

Note: TKEL3-125 series residual current protection circuit breakers do not have a metering controller.

Product Architecture

1 Operating Mechanism

2 Current Transformers (protection/measurement/power supply current transformers)

3 Zero Sequence Current Transformer

4 Base

5 Middle Cover

6 Arc Extinguishing Chamber

7 Electric Operating Mechanism

8 Display Screen

9 Circuit Component Board

10 Top Cover

Main technical parameters and performance

TKEL3 Circuit Breaker Main technical parameters

Product Model	TKEL3-125	TKEL3-250	TKEL3-400	TKEL3-630 Increased Capacity Type	TKEL3-630 Non-Increased Capacity Type	TKEL3-800
Enclosure Current Inm (A)	125	250	400	630	630	800
Setting Current IR (A)	50A~125A Adjustable	100A~250A adjustable	160A~400A adjustable	250A~630A adjustable	250A~630A adjustable	320A~800A adjustable
Rated insulation voltage Ui (v)	AC1000v
Rated Impulse Withstand Voltage Uimp (V)	8000V
Pole number	3P+N
Rated voltage Ue (v)	AC 400V
Rated ultimate breaking capacity Icu (kA)	50	80	80		80
Rated operating breaking capacity Ics (kA)	35	50	50		50
Rated short-time withstand current Icw (kA)	1.5kA/1s	5kA/0.5s	5kA/0.5s	7.6kA/0.5s	10kA/1s
Usage Category	A	B	B		B

Performance Advantages and Features

automatic reclosing

The circuit breaker integrates an operating mechanism and a built-in chip protection unit. After tripping, it automatically recloses within 20-60 seconds.

Protection, measurement, and communication functions are independently designed

It is embedded with independent protection, measurement, and communication microprocessor modules, improving the stability of system operation; it has an independent power supply module to ensure normal circuit operation when the circuit breaker is unloaded.

Data Storage Function

It realizes the storage of power parameters such as current, voltage, and power, providing operation and maintenance personnel with corresponding information query and fault judgment.

Display Unit

LCD display: The display is intuitive and clear, facilitating quick reading of electrical parameters.

Precise Measurement

It has an independent high-precision measurement module to ensure measurement accuracy; the accuracy can reach ±0.5%.

Topology Structure

It can realize upper and lower level relay protection, accurate fault location, selective switching, etc.

Convenient Communication

The circuit breaker has an RS485 port, which can be matched with various communication protocols: MODBUS-RTU, DL/T645, DL/T698, etc. It has low-power wireless communication (Bluetooth) function and can be expanded with infrared communication function and HPLC high-speed carrier function.