High-Quality SJKQ2 Dual Power Automatic Transfer Switch Factories, Company
High-Quality SJKQ2 Dual Power Automatic Transfer Switch Factories, Company
High-Quality SJKQ2 Dual Power Automatic Transfer Switch Factories, Company
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High-Quality SJKQ2 Dual Power Automatic Transfer Switch Factories, Company
High-Quality SJKQ2 Dual Power Automatic Transfer Switch Factories, Company
High-Quality SJKQ2 Dual Power Automatic Transfer Switch Factories, Company

High-Quality SJKQ2 Dual Power Automatic Transfer Switch Factories, Company

The SJKQ2 ATS Automatic Transfer Switch delivers robust power transfer solutions for critical systems, supporting 100A-3200A loads at AC 400V with 500-800V insulation and 6-8kV impulse withstand. Engineered for harsh environments, this ATS operates at altitudes ≤2000m and temperatures -5°C to +40°C, featuring <3s switching and AC-33iB performance. With short-time withstand currents up to 16kA, it ensures reliability in Pollution Degree 3/Category Ⅲ installations. The SJKQ2 Automatic Transfer Switch prevents power interruptions with seamless source transition, making it ideal for industrial and commercial backup systems requiring fail-safe operation.

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Product Description

Type Designation

SJKQ2-Dual-Power-Automatic-Transfer-Switch-4
1 Manufacturer Code
2 Auto-Transfer Function
3 Dervatve 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)

Technical Parameters

Rated current 100A 160A 250A 630A 1600A 3200A
Rated voltage AC 400V
Rated Insulation voltage (Ui) 500V 800V
Rated Impulse withstand voltage (Uimp) 6KV 8KV
Rated Short-time withstand current (Icw) 5KA 10KA 16KA
Switch time <3s 5s
Rated control voltage AC 230V
Ambient Temperature The upper limit is +40°C, the average value does not exceed +35°C within 24 hours; the lower limit is -5°C.
Altitude The altitude of the installation site does not exceed 2000m.
Installation Environment No explosive atmosphere environment. No rain intrusion environment.
Power Supply Voltage Deviation <85%Ue
Using Category AC-33iB
Installation Category II
Pollution Degree 3

Product Display

SJKQ2-Dual-Power-Automatic-Transfer-Switch-(1)
SJKQ2-Dual-Power-Automatic-Transfer-Switch-(2)
SJKQ2-Dual-Power-Automatic-Transfer-Switch-(3)

Main Circuit Wiring Diagram & External Power ON Indicator

SJKQ2-3
  1. Normal Neutral Line
  2. Normal Source ON Indicator
  3. Alternate Neutral Line
  4. Alternate Source ON Indicator

Terminal Diagram

If the user requires fire protection and power generation functions, please consult with the manufacturer for customization. The wiring diagram is as follows:
SJKQ2-4

Outline and Installation Dimensions

SJKQ2-5

Installation Dimensions

SJKQ2Automatic Power Transfer Switch Installation Dimensions

Model Dimensions W W1 L L1 H
SJKQ2-100/3P 290 253 205 186 120
SJKQ2-100/4P 320 282 205 186 120
SJKQ2-225/3P 330 296 215 195 140
SJKQ2-225/4P 365 333 215 195 140
SJKQ2-400/3P 465 410 310 285 190
SJKQ2-400/4P 508 455 310 285 190
SJKQ2-630/3P 528 478 318 295 195
SJKQ2-630/4P 588 535 318 295 195
SJKQ2-800/3P 608 556 334 310 190
SJKQ2-800/4P 678 626 334 310 190
SJKQ2-1250/4P 695 642 391 365 288
SJKQ2-1600/4P 695 642 391 365 288

Frequently Asked Questions (FAQ)

1. What is the switching time of the SJKQ2 automatic transfer switch?

For models rated up to 250A, the switching time is less than 3 seconds. For models from 630A to 3200A, the switching time is approximately 5 seconds.

2. What are the operating ambient temperature requirements?

The device operates within an ambient temperature limit of -5°C to +40°C, with a 24-hour average temperature not exceeding +35°C.

3. What power applications does the SJKQ2 series support?

It supports both Grid-to-Grid and Grid-to-Generator power transfer configurations, available depending on the selected function code.

4. Can this switch support fire protection integration?

Yes, fire protection and custom power generation functions are supported via smart type models (W2, Y, or N codes) and manufacturer customization.

5. What are the installation environmental limits for this transfer switch?

The equipment should be installed at altitudes below 2,000 meters in environments free of explosive atmospheres and protected from rain intrusion.

6. What pole configurations are available?

The SJKQ2 series is widely available in both 3-Pole (3P) and 4-Pole (4P) configurations depending on frame size and operational requirements.

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