High-Quality China Suppliers SJKQ2Z ATS Automatic Transfer Switch for Dual Power 100A-1250A - Reliable Factory Solutions Manufacturers, Manufacturer

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High-Quality China Suppliers SJKQ2Z ATS Automatic Transfer Switch for Dual Power 100A-1250A - Reliable Factory Solutions Manufacturers, Manufacturer

The SJKQ2Z ATS Automatic Transfer Switch is an essential solution for reliable power management, designed to seamlessly integrate with SJKM1 series circuit breakers. This high-performance switch is suitable for loads ranging from 100A to 1250A at 400V AC/50-60Hz, making it an ideal choice for critical backup systems in both industrial and commercial settings, Manufactured in China, this ATS boasts features such as adjustable delay timing from 0 to 30 seconds, a 2500V insulation withstand capacity, and a remarkable 5000-cycle mechanical endurance. With available 3P/4P configurations and an AC230V control voltage, the SJKQ2Z Automatic Transfer Switch ensures smooth transitions between primary and secondary power sources, effectively preventing flicker or breakdown during operation

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Product Description

Type Designation

1	Manufacturer Code
2	Auto-Transfer Function
3	Derivative Code: (): NCCB; W Compact Type; W1: Economy Type; W2: Smart Type (Undervoltage / Phase-Loss / Off / Fire Protection)
4	Function Code: R – Grid-to-Grid (Optional); F – Grid-to-Generator; M – Terminal Type (Optional); Y – Integrated Smart Type (Off / Fire Protection / Undervoltage); N – Split Smart Type (Off / Fire Protection / Undervoltage)
5	Frame Size Current
6	Number of Poles
7	Rated Current (In)

Setting Program Instructions

1. LCD Display
2. SET Button
3. Right-Shift Button
4. Increment Button (+)
5. Decrement Button (−) / Alarm
6. Manual Mode Button
7. Auto Mode Button
8. Dual-Off Button

Note: LCD display abbreviations: "auto-reclose" (AR), "No auto-reclose" (NAR), "SF01" must not be changed.

Product Display

Technical Parameters

Model	Circuit Breaker Model	Rack Current (A)	Rated Operational Current
SJKQ2Z-100/3	SJKM1 series	100 225 400 630 800 1250	10 / 16 / 20 / 25 / 32 / 40 / 50 / 63 / 80 / 100
SJKQ2Z-100/4			10 / 16 / 20 / 25 / 32 / 40 / 50 / 63 / 80 / 100
SJKQ2Z-225/3			100 / 125 / 140 / 160 / 180 / 200 / 225
SJKQ2Z-225/4			100 / 125 / 140 / 160 / 180 / 200 / 225
SJKQ2Z-400/3			250 / 315 / 350 / 400
SJKQ2Z-400/4			250 / 315 / 350 / 400
SJKQ2Z-630/3			400 / 500 / 630
SJKQ2Z-630/4			400 / 500 / 630
SJKQ2Z-800/3			630 / 700 / 800
SJKQ2Z-800/4			630 / 700 / 800
SJKQ2Z-1250/3			800 / 1000 / 1250
SJKQ2Z-1250/4			800 / 1000 / 1250
Breaking Current (kA)	Refer to the instruction manual of the specific circuit breaker model.
Rated Operational Voltage (V)	400V
Insulation Voltage (V)	2500 — No flicker and no breakdown within one minute
Frequency (Hz)	50–60 Hz
Delay Time	0–30s Adjustable
Control Rated Operating Voltage (V)	AC 230V
Mechanical Life	5000 times

Outline and Installation Dimensions

Size / Dimensions	W	W1	L	L1	H
SJKQ2Z-100/3P	390	355	220	200	120
SJKQ2Z-100/4P	420	385	220	200	120
SJKQ2Z-225/3P	430	395	220	205	140
SJKQ2Z-225/4P	465	435	220	205	140
SJKQ2Z-400/3P	560	510	310	285	190
SJKQ2Z-400/4P	605	555	310	285	190
SJKQ2Z-630/3P	625	570	320	295	195
SJKQ2Z-630/4P	690	635	320	295	195
SJKQ2Z-800/3P	705	655	340	315	190
SJKQ2Z-800/4P	780	730	340	315	190
SJKQ2Z-1250/3P	730	675	480	365	280
SJKQ2Z-1250/4P	800	745	480	365	280

Installation and Usage Instructions

21: Normal Neutral Line
22: Alternate Neutral Line
23, 24: Normal Source ON Indicator Light
25, 26: Alternate Source ON Indicator Light
27, 28: Normal Source ON Indicator Light
29, 30: Alternate Source ON Indicator Light
31, 32: Duo Status Indicator Light
33, 34: Fire Signal Input / AC or DC 6–24V Dry
35, 36: Generator Contact (5A)

Frequently Asked Questions

What is the SJKQ2Z ATS Switch and what is it used for?

The SJKQ2Z is an Automatic Transfer Switch (ATS) designed for dual-power applications. It automatically transfers the load between a normal power source and a backup source (such as a generator or secondary grid supply), ensuring continuous power supply in the event of a primary source failure.

What are the available frame sizes and rated currents for the SJKQ2Z series?

The SJKQ2Z series is available in frame sizes of 100A, 225A, 400A, 630A, 800A, and 1250A, each offered in 3-pole and 4-pole configurations. Rated operational currents range from 10A up to 1250A depending on the selected model.

How do I enter the setting mode and what is the default password?

Press the SET button to enter setting mode. The display will show "CodE". Use the Right-Shift button (>>) and Increment/Decrement buttons (︽︾) to enter each digit of the password. The default password is 8888.

Can the transfer delay time be adjusted, and what is the adjustment range?

Yes, the transfer delay time is fully adjustable. Both Normal-to-Backup (N-R) and Backup-to-Normal (R-N) transfer times, as well as the dual-off time (SF), support two-stage delay configuration. The overall delay range is 0 to 30 seconds, adjustable through the setting program.

What is the rated operational voltage and what frequency does the SJKQ2Z support?

The SJKQ2Z ATS Switch is rated for an operational voltage of 400V AC. It supports a frequency range of 50–60 Hz, making it suitable for both international power grid standards.

What smart protection functions does the W2 derivative code offer?

The W2 smart type derivative code provides advanced protection functions including Undervoltage protection, Phase-Loss protection, Off-mode control, and Fire Protection signaling. These features make the W2 variant suitable for critical installations requiring enhanced safety and automation.

Step	Key Press	Display Data	Operation	Function
1	SET	CodE	Enter setting mode	Password setup
2	>>	OodE	Press (︽︾) the first digit of the password	Password setup
3	>>	80dE	Press (︽︾) the second digit of the password	Password setup
4	>>	880E	Press (︽︾) the third digit of the password	Password setup
5	>>	8888	Press (︽︾) the fourth digit of the password	Password setup 8888
6	>>	dddd / N-R 03s	Correct password shows Normal-Backup transfer time	Normal-Backup transfer time
6	>>	dddd / N-R 03s	Press (︽︾) to set N-R 1st-stage delay	Normal-Backup transfer time
7	>>	N-R 03s	Shows Normal-Backup transfer time	Normal-Backup transfer time
7	>>	N-R 03s	Press (︽︾) to set N-R 2nd-stage delay	Normal-Backup transfer time
8	>>	R-N 03s	Shows Backup-Normal transfer time	Backup-Normal transfer time
8	>>	R-N 03s	Press (︽︾) to set R-N 1st-stage delay	Backup-Normal transfer time
9	>>	R-N 03s	Shows Backup-Normal transfer time	Backup-Normal transfer time
9	>>	R-N 03s	Press (︽︾) to set R-N 2nd-stage delay	Backup-Normal transfer time
10	>>	SF 08s	Show dual-off time	Dual-off transfer time
10	>>	SF 08s	Press to set SF 1st-stage delay	Dual-off transfer time
11	>>	SF 08s	Show dual-off time	Dual-off transfer time
11	>>	SF 08s	Press (︽︾) to set SF 2nd-stage delay	Dual-off transfer time
12	>>	FFF 1	Press (︽︾) to set auto-recovery (1=ON, 0=OFF)	ON / OFF
13	>>	FD 0	Press (︽︾) full-auto generator mode to 0 and semi-auto model to 1	Starter Generator
14	>>	FC 0	Press (︽︾) to set priority (0=Normal, 1=Backup)	Priority setting
15	>>	H 130	Press (︽︾) to set Overvoltage setting (220V × 130%)	Overvoltage setting
16	>>	L 50	Press (︽︾) to set Undervoltage setting (220V × 50%)	Undervoltage setting
17	>>	NA 220V	Press (︽︾) to calibrate Normal Phase-A voltage	Show live voltage
18	>>	NB 220V	Press (︽︾) to calibrate Normal Phase-B voltage	Show live voltage
19	>>	NC 220V	Press (︽︾) to calibrate Normal Phase-C voltage	Show live voltage
20	>>	RA 220V	Press (︽︾) to calibrate Backup Phase-A voltage	Show live voltage
21	>>	RB 220V	Press (︽︾) to calibrate Backup Phase-B voltage	Show live voltage
22	>>	RC 220V	Press (︽︾) to calibrate Backup Phase-C voltage	Show live voltage
23	>>	SAVE		Save data

High-Quality China Suppliers SJKQ2Z ATS Automatic Transfer Switch for Dual Power 100A-1250A - Reliable Factory Solutions Manufacturers, Manufacturer

Product Description

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