Chint Universal-Transferschalter LW5D-16YH3/3

Der Chint Universal Transfer Switch LW5D16YH3/3 is a highperformance switch specifically designed for industrial control, suitable for scenarios such as voltage measurement and motor control. Im Folgenden finden Sie die wichtigsten Informationen und Anwendungsrichtlinien:

Model Analysis and Core Parameters
Modellbedeutung

LW5D: Series code (L transfer switch, W universal, 5 design serial number, D positioning type).

16: Rated thermal current 16A (applicable to AC15/DC13 loads).

YH3/3: Function code (YH voltage measurement, 3 3section contact system, 3 3 operation positions).

Technical ParametersClick on the red text to view the

Nennspannung: AC 380V/DC 220V.

Contact form: 3 independent sections of contacts, supporting threephase voltage switching (such as UAB, UBC, UCA).

Operation angle: Fourposition positioning at 0° (middle position), 90°, 180°, and 270°, and voltage switching is achieved by rotating the handle.

Zertifizierung: Complies with GB/T 14048.5 und IEC 6094751 Standards, and has passed 3C certification (Certificate number: 2024010305685092).

Typische Anwendungsszenarien
Voltage Measurement

Used to switch the voltmeter in the power distribution cabinet to measure the threephase line voltage (such as UAB, UBC, UCA).

Wiring example

Inlet terminal: Terminals 1, 5, Und 9 are connected to the threephase power supply (L1, L2, L3).

Outlet terminal: Terminals 2 Und 4 are connected to the voltmeter, and terminals 6 Und 10, as well as terminals 8 Und 12, are shortcircuited internally through the connection piece.

Motorsteuerung

Supports functions such as forward and reverse rotation and twospeed switching of motors below 5.5kW (the corresponding model needs to be selected, such as LW5D16 5.5N/3).

Wiring key points

Main circuit: Connect the motor power cable to the output terminals of the switch (such as 2/T1, 4/T2, 6/T3).

Control circuit: Achieve motor rotation direction or speed switching through the onoff of contacts.

Besondere Anforderungen

Explosionproof and anticorrosion: A customized model (such as LW5D16YH3/3Ex) is required to meet the use in dangerous environments.

Seismic reinforcement: Complies with the GB 50260 seismic code and is suitable for highvibration occasions.

III. Installation und Wartung

Installationsmethode

Railmounted: Quickly installed through a 35mm standard rail, saving cabinet space.

Bolt fixation: Use M4 bolts to fix it on the panel to ensure mechanical stability.

Verkabelungsspezifikationen

Contact layout: Terminals 112 are divided into three groups (14, 58, 912), and each group corresponds to a voltage gear.

Insulation requirements: Nach der Verkabelung, check the insulation resistance (≥10MΩ) to avoid short circuits.

Wartungsvorschläge

Replacement of vulnerable parts: The height of components such as contactor coils and indicator lights is ≤1.8m for easy operation.

Regular inspection: Clean the contacts quarterly to ensure good contact; calibrate the action value of the protection device annually.

Model Selection and Procurement
Model Comparison

Modell	Number of Contact Sections	Operation Positions	Typische Anwendungen
LW5D16YH2/2	2 sections	Three positions	Twophase voltage measurement
LW5D16YH3/3	3 sections	Four positions	Threephase voltage measurement
LW5D16 5.5N/3	3 sections	Three positions	Forward and reverse rotation control of motors

Procurement Channels

Ecommerce platforms: Suning.com, JD.com, Alibaba, usw., mit einem Stückpreis von ca 2333 Yuan (inklusive Fracht).

Authorized distributors: A business license needs to be provided, and bulk purchases are supported (such as Beijing Chuangxinjie Electromechanical Equipment Co., Ltd.).

Acceptance Key Points

Function test: Manual/automatic opening and closing, and the dualpower supply switching time ≤100ms.

Document verification: It should include circuit diagrams, component lists, a copy of the 3C certification, and the factory test report.

Frequently Asked Questions
How to distinguish between voltage/current transfer switches?

Voltage type (YH): Fewer contact groups (wie zum Beispiel 3 sections), used to switch the voltmeter.

Current type (LH): More contact groups (wie zum Beispiel 6 sections), used to switch the ammeter.

Can it replace Schneider’s similar products?

It is necessary to confirm the installation dimensions (such as a panel opening of 55×55mm) and contact logic. It is recommended to consult the manufacturer’s technical support.

How to customize the explosionproof type?

It is necessary to communicate with the manufacturer in advance and provide the explosionproof grade (such as Ex d IIB T4 Gb) and installation environment parameters.