TKDM3E-Y intelligent moulded-case circuit breaker (MCCB)-Taikai Electric Appliance-Dedicated to low-voltage equipment

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TKDM3E-Y intelligent moulded-case circuit breaker (MCCB)

The TKDM3E-Y series intelligent moulded-case circuit breaker (MCCB) is suitable for AC 50Hz circuits with a rated insulation voltage of 1000V, a rated voltage of AC690V or less, and a rated working current of 800A or less. It is generally used for power distribution, distributing electrical energy, and protecting lines and power equipment from damage caused by overloads, short circuits, and undervoltage faults. It can also be used for infrequent switching of lines and infrequent starting of motors.

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TKDM3E-Y intelligent moulded-case circuit breaker (MCCB)

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Product Details

Product Introduction

The TKDM3E-Y series intelligent Moulded-case circuit breaker (MCCB) is suitable for AC 50Hz circuits with a rated insulation voltage of 1000V, rated voltage AC690V 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 with infrequent line switching and infrequent motor starting.

The circuit breaker has overload long-delay inverse time, short-circuit short-delay inverse time, short-circuit short-delay time-limit, short-circuit instantaneous, and undervoltage protection functions, as well as optional phase-failure protection. The circuit breaker's comprehensive and precise protection functions improve power supply reliability and prevent unnecessary power outages. The product has "four remote" functions to meet the requirements of control centers and automated systems.

The circuit breaker features high breaking capacity, small size, modular design, short arcing distance, and strong anti-interference capability.

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

GB/T 22710 Electronic controllers for low-voltage circuit breakers

Environmental Verification

GB/T 14597 Electrical products - Climatic environmental conditions at different altitudes

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

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 temperature: Normal -5℃~+40℃, Extreme -25℃~+70℃;

Installation altitude: Not exceeding 5000m (derating required above 2000m);

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

Pollution degree: Level 3;

Circuit breaker protection level IP20, with terminal cover IP40;

Usage category: B;

Installation category: Class Ⅲ;

Installation vertical inclination not exceeding 5°;

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

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	3
4	Trip unit code	E: Electronic trip unit
5	Frame size	250、400、630、800
6	Breaking level code	Breaking level code：M、H
7	LCD Display	Y: LCD display
8	Operation mode code	No code: Direct manual operation P: Electric operating mechanism Z: Rotary handle operating mechanism
9	Pole number	3: 3 poles 4: 4 poles
10	Internal accessory code	300: No accessories Others see Trip method and internal accessories table
11	Communication protocol code	A: MODBUS-RTU B: DL/T 645 C: DL/T 698

Product Features

Protection functions Features overvoltage, undervoltage, and phase-failure voltage protection; more accurate and reliable current protection functions; electronic overload, short-circuit short-delay, and instantaneous protection; protection function opening and closing, operating values, and operating times are all adjustable;

Display unit Indicator lights plus a high-definition LCD screen for user-friendly interaction; the LCD screen scrolls to display the circuit breaker's current voltage, current, and power information. In case of a fault, the display window freezes and displays the cause of the fault;

Modular design The controller has an independent power supply module. Even without a load on the circuit breaker, the power module can still supply power to the controller. The circuit has built-in independent protection, measurement, and communication microprocessor modules. Command execution does not interfere with each other, ensuring the stability of the system operation.

Complete accessories The secondary terminals on the right side of the circuit breaker are equipped with two sets of auxiliary contacts and a set of passive excitation terminals, which can meet the attachment requirements in most cases. Meanwhile, the left side of the circuit breaker reserves space for attachment installation, allowing for the expansion of other installable attachments.

Calculation Accuracy Current: (0.05-1.2)In, accuracy up to ±2%; Voltage: AC(5-690)V, accuracy up to ±2%. The circuit breaker has an independent precision metering module to ensure metering accuracy.

Convenient Communication The circuit breaker comes standard with an RS485 communication interface, which can match various communication protocols: MODBUS-RTU, DL/T645 、DL/T698 ; The following functions can be achieved: Remote signaling: (dis)connection, fault status indication; Remote control: disconnection; Remote measurement: I, U, F, P, E, THD; Remote adjustment: remote adjustment of power parameters. The communication protocol meets the requirements of the State Grid's "General Technical Specifications for Moulded-case circuit-breaker (MCCB)" and "Special Technical Specifications for Moulded-case circuit-breaker (MCCB)".

Record Query It records the details of the last 10 circuit breaker operations, including information on changes in the on/off position, protective function operation information, and the time of occurrence; it records the total cumulative number of circuit breaker trips and the number of circuit breaker trips caused by each protective function.

Main Technical Parameters and Performance Indicators

*According to GB14048.1, the term "life" refers to the probability of the number of operations an electrical appliance can complete before repair or replacement of parts.

Product Appearance
Model		TKDM3E-250Y		TKDM3E-400Y		TKDM3E-630Y		TKDM3E-800Y
Enclosure Current In (A)		250		400		630		800
Setting Current Ir (A)		100A~250A adjustable		160A~400A adjustable		250A~630A adjustable		320A~800A adjustable
Rated Insulation Voltage Ui (V)		AC 1000V
Rated Impulse Withstand Voltage Uimp		8000V
Pole number		3, 4
Rated Voltage Ue (V)		AC 400V, AC 690V
Short-circuit Breaking Capacity Level		M	H	M	H	M	H	M	H
Rated Ultimate Breaking Capacity Icu (kA)	AC 400V	50	85	65	100	75	100	75	100
	AC 690V	20	—	20	—	30	—	30	—
Rated Operating Breaking Capacity Ics (kA)	AC 400V	35	50	42	65	50	65	50	65
	AC 690V	10	—	15	—	20	—	20	—
Rated Short-time Withstand Current Icw (kA/1s)		5		5		8		10
Usage Category		B		B		B		B
Mechanical Life (times)		7500		5000		4000		4000
Mechanical Life (times) *	Maintenance-free	12500		8000		6000		6000
	With Maintenance	20000		20000		20000		20000
Dimensions	L	3P: 107, 4P: 142		3P: 150, 4P: 198		3P: 210, 4P: 280		3P: 210, 4P: 280
	W	118		152		159		159
	H (including handle)	≤50		≤100
Arcing Distance		0 (with terminal cover)