TKDM5G-250 Moulded-case circuit-breaker (MCCB) (smart measuring switch)-Taikai Electric Appliance-Dedicated to low-voltage equipment

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TKDM5G-250 Moulded-case circuit-breaker (MCCB) (smart measuring switch)

TKDM5G-250 Moulded-case circuit-breaker (MCCB) (smart measuring switch) is a modular, intelligent measuring switch developed by our company based on the current needs for analysis and replacement of inaccurate smart electricity meters. It deeply integrates traditional Moulded-case circuit-breakers (MCCBs) with high-precision measurement, communication, high-precision clocks, event alarms, and recording functions. This product is suitable for AC 50Hz, rated voltage AC 440V and below, and rated current not exceeding 250A low-voltage distribution lines. It has overload, short-circuit, and short-circuit short-delay protection functions, and can also achieve high-precision measurement of current, voltage, power, energy, and power factor. It supports RS485 and HPLC communication functions. The measurement unit is hot-swappable and interchangeable, providing data support for low-voltage distribution area line loss analysis and load analysis, and meeting the requirements of refined electricity management.

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TKDM5G-250 Moulded-case circuit-breaker (MCCB) (smart measuring switch)

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Product Details

Product Introduction

TKDM5G-250 The Moulded-case circuit-breaker (MCCB) (smart measuring switch) is a modular, intelligent measuring switch specially developed by our company based on the current needs for analyzing and replacing inaccurate smart electricity meters. It deeply integrates traditional Moulded-case circuit-breakers (MCCBs) with high-precision measurement, communication, high-precision clocks, event alarms, and recording functions. This product is suitable for low-voltage distribution lines with AC 50Hz, Rated voltage AC440V or less, and Rated current not exceeding 250A. It has overload, short-circuit, and short-circuit short-delay protection functions. It can also achieve high-precision measurement of current, voltage, power, energy, and power factor. It supports RS485 and HPLC communication functions. The measurement unit is hot-swappable and interchangeable, providing data support for low-voltage distribution area line loss analysis and load analysis, and meeting the requirements of refined electricity management.

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 14048.3 Low-voltage switchgear and controlgear Part 3: Switches, isolators, switch-disconnectors and fuse-combination units

Q/GDW 12174 State Grid Corporation of China 《smart measuring switch technical specifications》

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: Low temperature

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: Cyclic damp heat (12h+12h cycle)

Standard Working Conditions

Normal operating ambient temperature: -25℃～+55℃, extreme 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 condensation occasionally caused by temperature changes;

Pollution degree: Grade 3;

Enclosure protection level: IP20 (except for terminals);

Installation category: Category Ⅲ;

Installation vertical inclination shall not exceed 5°;

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

Product Features

Complete protection functions: It has complete protection functions such as overload long-delay protection, short-circuit instantaneous protection, and short-circuit short-delay protection.

Precise measurement: The circuit breaker has a built-in high-precision current transformer, which monitors various power parameters of the power grid system in real time. The metering accuracy is 0.5s level, providing data support for the entire area line loss analysis and load analysis.

Convenient communication: The measurement unit has an RS485 communication port and an HPLC carrier communication module, and can be expanded with Bluetooth communication to achieve self-organizing communication networks and topology identification.

Hot-swappable and interchangeable: The measurement unit is hot-swappable, and the calibration data will not be lost after replacement, still meeting the measurement accuracy requirements.

Safe and reliable: It has built-in independent protection, measurement, and communication microprocessor modules to improve work reliability.

Main Functions of the Circuit Breaker

Function Category	Item	Parameter
Measurement Function	Current	Current range: 0.004In~0.01In Error limit: ±0.75% Current range: 0.01In~Imax Error limit: ±0.5%
	Voltage	Voltage range: 0.65Ue~1.2Ue Error limit: ±0.75%
	Frequency	Frequency measurement range: 45.00~55.00 Hz Error limit: ±0.1Hz
	Power	Total and phase-by-phase forward and reverse active power, reactive power accuracy: ±1%
	Power Factor	Measurement range: 0.500~1.000 Error limit: ±0.005
	Energy	Total and phase-by-phase forward and reverse active energy accuracy: 0.5s level, reactive power 2 level
	Freeze Function	Hourly freeze: 254 times Daily freeze: 62 times Monthly freeze: 12 times
	Load Recording	7-day load curve recording
Protection Function	Protection Function	See Protection Function and Operating Characteristics Table
Communication Function	Communication Method	RS485 communication, HPLC broadband carrier communication, Bluetooth communication (version 5.0 and above)
	Communication Protocol	Supports DL/T 645 - 2007, DL/T 698.45 - 2017 communication extension protocols
	Function	Remote signaling: Switch closing, opening, fault information Remote control: Remote control tripping/opening Telemetry: Measurement of electrical parameters such as current, voltage, and electric quantity. Remote adjustment: Remote setting of protection and operating parameters
	Indicator lights	Operating status, communication status, current overload, and pulse signal indication
Other functions	Fault recording	Records information such as current overload, short-circuit faults, and voltage faults
	Topology identification	Internally integrated topology identification information acquisition function, adaptive topology signal function, supports automatic topology identification of the feeder area
	Pulse output	Equipped with clock second pulse output, electric energy pulse output, and LED indication output
	Temperature monitoring	Equipped with temperature detection function for the switch body and input/output terminals (optional)
	Interoperability	Supports interoperability with intelligent electricity meters HPLC modules and energy controllers
	Online upgrade	Supports online program upgrades using RS485 and broadband carrier communication methods

Main technical parameters

Item	Main technical parameters
Product specifications and models	TKDM5G-160		TKDM5G-250
Rated working currentIn(A)	80A, 100A, 125A, 160A		100A, 125A, 160A, 200A, 250A
Long-delay setting time t(s)	12~150s continuously adjustable
Rated voltage Ue(V)	AC400V 50Hz
Pole number	3P
Rated insulation voltage Ui	AC1000V
Rated impulse withstand voltage Uimp	8kV
Rated ultimate breaking capacity Icu	L type: 36kA, M type: 50kA
Rated operating breaking capacity Ics	L type: 25kA, M type: 36kA
Rated short-time withstand current Icw	3kA 1s
Short-circuit short-delay current Isd	2~10Ir adjustable in steps	Short-delay operating time tsd	0.1~0.4s continuously adjustable
Short-circuit instantaneous setting current Ii	3~12Ir adjustable in steps
Measurement accuracy	Voltage: 0.70Ue≤U≤1.30Ue error ≤±0.5% Current: 0.01In≤I≤1.05In error ≤±0.5% Frequency: 45.00Hz≤f≤55.00Hz error ≤±0.1Hz Total power factor: 0.500~1.000 error ≤±0.005
Pulse output	Active power energy pulse output Reactive power energy pulse output Clock second pulse output