YCQ7B-63 Automatic Transfer Switch

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YCQ7B-63 Automatic Transfer Switch

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YCQ7B-63 Automatic Transfer Switch

YCQ7B-63 Automatic Transfer Switch (ATS) is applicable to three-phase four-wire dual-power supply grids with AC 50Hz, rated operational voltage AC 400V and rated operational current up to 63A. It can automatically transfer one or several load circuits from one power source to another to ensure the normal power supply of load circuits. This product is suitable for relatively important places such as industrial and commercial areas, high-rise and civil residential buildings.

Standards:IEC 60947-6-1

Product Details

General

YCQ7B-63 Automatic Transfer Switch is a 63A CB class ATS designed for three-phase four-wire dual power supply systems. It supports automatic and manual transfer between normal and standby power sources, with overload and short-circuit protection for safer and more reliable power distribution. Compliant with IEC 60947-6-1, it is suitable for industrial, commercial, residential, and building power applications.

Type designation

Operating Conditions

• Ambient air temperature: The upper limit of ambient air temperature is +40°C, the lower limit is -5°C, and the average temperature within 24 hours shall not exceed +35°C.

• Altitude: The altitude of the installation location shall not exceed 2000m.

• Atmospheric conditions: The relative humidity of the atmosphere shall not exceed 50% when the maximum ambient temperature is +40°C, and higher relative humidity is allowed at lower temperatures (e.g., up to 90% at +20°C). Special measures shall be taken against condensation occasionally caused by temperature changes.

• Pollution degree: Pollution degree is 2.

• Installation category: Installation category is IV.

• Installation inclination: The product is fixedly installed in the cabinet, with a maximum inclination of ±22 .5°.

Technical data

Product Model	YCQ7B-63
Compliance Standard	IEC 60947-6-1
Rated Operational Voltage (V)	AC 400V/50Hz
Rated Insulation Voltage (V)	500
Impulse Withstand Voltage (KV)	4
Pole Number	3P/4P
Utilization Category	AC-33iB
Contact Transfer Time (s)	0.45±50%
Transfer Action Time (s)	0.9±20% - 1.3±10% (Type B, C, D)
Return Time (s)	0.9±20% - 1.3±10% (Type B, C, D)
Power-of Time (s)	0.45±50%
Rated short-circuit making capacity 9.18kA	9.2kA
Rated making and breaking capacity	6kA
Electrical Class	CB Class
Protection Characteristics	Overload Protection/Short Circuit Protection
Installation Method	Vertical Fixed Installation
Wiring Method	Screw Wiring
Operation Mode	Automatic/Manual
EMC Environment	Environment B
Insulation Stripping Length Before Conductor Insertion into Terminal (mm)	11
Maximum Number of Conductors Allowed to Be Clamped	1
Protection Level	IP20
Screw Tightening Torque (N·m)	2.5
Screw Breaking Torque (N·m)	3
Delay Time Range (s)	Fixed (Type B, C); 0~30s Gear Adjustable (Type D)
Power Supply Voltage Deviation Range (V)	160±10%
Normal Operating Range	85%Ue~110%Ue
Special Requirements	Normal Installation Conditions
Isolation Applicability	Yes
Switch Position	Normal (I), Of (O), Standby (II)
Mechanical Life	10000 times
Electrical Life	3000 times

Controller Functions

Controller Type		Type A	Type B	Type C	Type D
Controller Installation Method		Integrated Type
Rated Operating Voltage		230V 50Hz/60Hz
Automatic Operation	Automatic Operation	■	■	■	■
Automatic Operation	Handle Operation	■	■	■	■
Monitoring	Monitoring Phase	Single-phase	Three-phase	Three-phase	Three-phase
	Monitoring Normal Undervoltage	Phase A	■	■	■
	Monitoring Normal Voltage Loss	Phase A	■	■	■
	Monitoring Normal Phase Loss	Phase A	■	■	■
	Monitoring Standby Undervoltage	Phase A	■	■	■
	Monitoring Standby Voltage Loss	Phase A	■	■	■
	Monitoring Standby Phase Loss	Phase A	■	■	■
	Generator Control	-	-	■	■
	Fire Signal Non-Essential Load Cutting	-	■	■	■
Transfer Mode	Auto-switch & Auto-recovery	■	■	■	■
	Mutual Standby	-	Customizable	Customizable	Customizable
	Auto-switch & Non-recovery	-	Customizable	Customizable	Customizable
Grid Connection	Grid-Grid	■	■	■	■
Grid Connection	Grid-Generator	-	-	■	■
Display	Display Mode	Indicator Light
	Normal Power Supply Status	■	■	■	■
	Standby Power Supply Status	■	■	■	■
	Normal Power Supply On/Of	■	■	■	■
	Standby Power Supply On/Of	■	■	■	■
	Manual/Auto Mode	■	■	■	■
Parameter Setting	Transfer Delay (s)	-	Fixed Delay	Fixed Delay	Adjustable Delay
Parameter Setting	Return Delay (s)	-	Fixed Delay	Fixed Delay	Adjustable Delay
Other Functions	Fire Linkage Position Feedback	-	-	■	■

Note: ■ indicates standard configuration; - indicates no such function

Controller Interface Introduction

YCQ7B-63 ATS Controller Secondary Wiring Diagram

Coding Switch Introduction

The coding switch has 5 delay gears in total: 0, 5, 10, 20 and 30 respectively.

0 means no delay, and the other gears represent 5s, 10s, 20s and 30s respectively.

Wiring Diagrams

Main Circuit Wiring Diagram for3-pole Products

YCQ7B-63 ATS Neutral Wiring Terminal for 63-type 3-pole Products

Main Circuit Wiring Diagram for 3-pole Products

Main Circuit Wiring Diagram for 4-pole Products

Controller Secondary Wiring Diagram

YCQ7B-63 ATS Controller Interface Introduction

• Normal power supply indicator light;

• Normal closing indicator light;

• Standby power supply indicator light;

• Standby closing indicator light;

• Auto/Manual button (for products with fire linkage function,the linkage can be released by pressing this button after fire linkage execution).

• Coding switch for adjustable normal delay time;

• Coding switch for adjustable standby delay time;

Note: Items 6 and 7 are only available on Type D products with adjustable delay.

YCQ7B-63 ATS terminals of the controller

Port Wiring Explanation:

1. Terminals 101, 102, 201 and 202 are only to be connected for 3-pole products. Connect the normal neutral wire to 101 or 102 (or both simultaneously); connect the standby neutral wire to 201 or 202 (or both simultaneously). The 3-pole product will not work without the working neutral wire connected (no connection required for 4-pole products).

2. 501, 502 for Passive Fire Signal Input (Note:After fire linkage is activated, the control mode will be locked and needs to be unlocked by pressing the rocker switch Auto/Manual button).

3. 503, 504 for Optional Function:A set of dry contact signal output.

4. 801, 802, 803 for Generator Start-Stop Signal Output. 802 is the COM terminal, 803 is the generator start signal, and 801 is the generatorstop signal.

Note: The functions related to terminals 501, 502, 503, 504 and 801, 802, 803 are only available when the“Intelligent Type” product is selected.

Overall and mounting dimensions(mm)

FAQ

What is the YCQ7B-63 Automatic Transfer Switch used for?

The YCQ7B-63 Automatic Transfer Switch is used to transfer load circuits between a normal power supply and a standby power supply. It helps maintain continuous power distribution when the main power source fails or becomes abnormal.

What is the rated current of the YCQ7B-63 ATS?

The YCQ7B-63 ATS supports rated currents up to 63A. Available current options include 10A, 16A, 20A, 25A, 32A, 40A, 50A, and 63A, making it suitable for small and medium dual power distribution systems.

Is YCQ7B-63 suitable for three-phase power systems?

Yes. The YCQ7B-63 is designed for three-phase four-wire dual power supply systems with AC 400V and 50Hz operation. It is available in 3-pole and 4-pole configurations to meet different wiring requirements.

What is the difference between a CB class ATS and a PC class ATS?

A CB class ATS integrates circuit breaker protection functions, such as overload and short-circuit protection. A PC class ATS is mainly designed for power transfer and usually does not provide the same overcurrent protection function by itself.

YCQ7B-63 is a CB class automatic transfer switch, making it suitable for applications that require both power transfer and circuit protection.

Does YCQ7B-63 support both automatic and manual operation?

Yes. YCQ7B-63 supports both automatic and manual operation. In automatic mode, the ATS transfers between power sources according to the power supply status. In manual mode, users can operate the switch manually when required for maintenance, testing, or emergency operation.

What controller options are available for YCQ7B-63?

YCQ7B-63 provides multiple controller options, including Type A, Type B, Type C, and Type D. Different controller types support different functions such as single-phase or three-phase monitoring, generator control, fire signal non-essential load cutting, and adjustable transfer or return delay.

Can the transfer delay time be adjusted?

For Type D products, the delay time can be adjusted through coding switches. The available delay settings are 0s, 5s, 10s, 20s, and 30s. Type B and Type C products use fixed delay settings.

Where can YCQ7B-63 Automatic Transfer Switch be installed?

YCQ7B-63 is suitable for industrial facilities, commercial buildings, high-rise buildings, civil residential buildings, and other important power supply locations. It is designed for vertical fixed installation in distribution cabinets and helps improve the reliability of dual power supply systems.