YCQVA-2 Automatic Transfer Switch

General

The YCQVA-2 series products are applicable to rated currents of 100A and below, supporting intelligent switching between dual power supplies of mains-to-mains and mains-to-generator. The two input circuits adopt a physical isolation design, fully complying with electrical safety specifications and standards.

It features dual modes of automatic circuit switching and manual free switching for flexible and convenient use. The overvoltage and undervoltage protection thresholds can be customized; automatic power-off protection is triggered immediately when the voltage exceeds the set range. A built-in delayed restart mechanism enables automatic closing and power supply restoration after the grid voltage stabilizes. Meanwhile, it allows independent setting of the current limiting value, with automatic power-off upon overcurrent and self-recovery after fault elimination. The complete machine integrates multiple safety protections including neutral loss, overvoltage, undervoltage and overload, comprehensively preventing hidden risks such as grid voltage fluctuations and current abnormalities. It effectively ensures the long-term stable operation of rear-end electrical equipment and avoids fault damage.  

Type designation

Model	Rated current	Rated supply voltage
YCQVA-2	63A	AC220V
Automatic transfer switch	63A 80A 100A	AC220V AC110V

 

Operating conditions

1. When installing the product, the input terminal must be connected to a circuit breaker. 2. After receiving the product, first connect only one power source to check if the display is normal. 3. The equipment must be installed by qualified professionals. 4. Before operating the device, disconnect all power supplies and do not touch any terminal when the power supply is connected. 5. Verify that terminals are properly connected. 6. Do not use the equipment in places that may be corroded by gas, strong sunlight and rain. 7. Clean equipment with a dry cloth. 8. Failure to comply with these instructions will result in serious injury or serious accident.  

Feature

1. Automatic Transfer Switch: with “priority” phase 2. Microcontroller-based 3. Digital display of working voltage, current 4. Measurement accuracy is 0.5 class 5. Key setting parameter 6. Can set the priority phase sequence 7. DIN rail mounting  

Technical data

Rated supply voltage	AC 2*110V/220V
Operating voltage range	AC 80-300V
Rated frequency	50/60Hz
Hysteresis	Overvoltage:5V Undervoltage:5V
Measurement accuracy	0.5 class
Rated insulation voltage	450V
Output contact	1NO
Electrical life	105
Switch delay to reserve phases	>0.2s
Overvoltage trip delay	0.1s; ≥350V; 0.02s
Undervoltage trip delay	0.1s; ≥350V; 0.02s
Mechanical life	106
Protection class	IP20
Pollution degree	3
Altitude
Operating temperature	-5°C~40°C
Humidity	≤50% or 40°C
Storage temperature	-10°C~55°C
Product size	63A:90*96*67mm ; 80A/100A:90*103*67mm
Voltage accuracy	<1%
Rated operating current	63A/80A/100A
Max. operating current	63A/100A

 

 

Display panel

Electrical symbol diagram

 

Wiring diagram

Program description

Set character	Technical parameter	Set range	Default value	Step forward	Function description
P-1	Power-on delay time	1S-999s	5s	1s	After external power cut, the time needed for power- on when power recovery.
P-2	Recovery/Switch Time	1S-999s	10s	1s	Is the time required for the line to return to normal  or switch to a working line.
P-3	Timed of	OFF-0.1m-999m	OFF	0.1m	Can be used to time of the device
P-4	Timed on	ON-0.1m-999m	ON	0.1m	The P-3 timer of parameters must be changed  before the timer on parameters can be adjusted.
P-5	Input phase priority  selection	L1-L2 -ATO	L1	1	Operating mode: When L1 or L2 is selected, it's a  priority phase selection; ATO: Non-priority mode,  fxed to the current phase.
P-6	Over-voltage  protection value	120V-300V  -OFF	270V 140V	1V	When the voltage of one phase is over the set  value, the protector will cut of this phase and switch  to the next phase according to the sequence set  in P5. When all voltage is over the set value, the  protector will cut of all lines.
P-7	Under-voltage  protection value	OFF-80V-210V	170V 90V	1V	When the voltage of one phase is under the set  value, the protector will cut of this phase and switch  to the next phase according to the sequence set  in P5. When all voltage is under the set value, the  protector will cut of all lines.
P-8	Voltage calibration	±9.9%	0	0.10%	Correct the voltage error.
P-9	Over-current  protection value	1A-63A/100A -  OFF	63A 80A	1A	When the current is higher than the set value, the  protector will cut of the line. When setting OFF,  the protector will turn of over-current protection  function.
P-10	Current calibration	±9.9%	0	0.10%	Calibrate current current value
P-11	Overcurrent protection  action time	0.1S-30s	1s	0.1s	When over current, the time needed for protection  action.
P-12	Times of continuous  over current protection	OFF-1-20	OFF	1	When the times of continuous over-current  protection exceeds the set value, the protector will  cut of the line, then it needs to be opened manually.
P-13	Temperature  protection	40°C-120°C	90°C	1°C	After temperature protection, the hysteresis value is  restored to 10°C.

 

Setup menu

Fault Description

Display	illustrate
oc	Overcurrent
HT	high temperature
TIM	Timed

 

Overall and mounting dimensions (mm)