PC class XSTNA Series Automatic Transfer Switch | Shihlin Electric
Explore Shihlin Electric products for low-voltage protection and automation—circuit breakers, magnetic switches/contactors, power distribution, inverters, AC drives, servo, HMI and PLC.
Automatic Transfer Switch
PC class XSTNA Series
Breaking Capacity
XSTNA Series ATS
The XSTNA-125/250/630 Series is a PC-class, three-position dual power automatic transfer switching equipment. It is mainly used in emergency power supply systems with AC 50Hz / 60Hz, rated voltage of 400V, and operating current from 16A to 630A.
When one power source becomes abnormal, the device automatically transfers the load to the other power source, ensuring reliable and safe power supply. It is widely applied in hospitals, shopping malls, chemical plants, metallurgy facilities, buildings, and fire protection systems.
Product Overview
The XSTNA series is suitable for emergency and standby power systems requiring compact structure, reliable transfer performance, and controller-based functional flexibility. The updated range now covers XSTNA-125H, XSTNA-250H, and XSTNA-630H.
Key Benefits
- Automatic transfer when one power source becomes abnormal.
- PC-class three-position switching structure.
- Available in B and D controller versions.
- Suitable for critical standby power applications.
- Supports mains-mains and mains-generator modes.
Application Scope
- Hospitals
- Shopping malls
- Chemical plants
- Metallurgy facilities
- Buildings and fire protection systems
Type Designation
The XSTNA model code defines frame size, structure, poles, controller type, rated current, power supply mode, and transfer mode.
| Item | Definition |
|---|---|
| Series Name | XSTNA |
| Frame Size / Rated Current | 125 / 250 / 630 |
| Structure | H |
| Poles | 3P / 4P |
| Controller Type | B / D |
| Rated Current |
125 Frame: 16, 20, 25, 32, 40, 50, 63, 80, 100, 125A 250 Frame: 125, 160, 200, 225, 250A 630 Frame: 315, 350, 400, 500, 630A |
| Power Supply Mode | Blank: Mains-Mains / F: Mains-Generator |
| Transfer Mode | Blank: Automatic Transfer / Automatic Return S: Automatic Transfer / No Automatic Return (S only available for D controller) |
Technical Specifications
Main electrical specifications for XSTNA-125H, XSTNA-250H, and XSTNA-630H.
| Item | XSTNA-125H | XSTNA-250H | XSTNA-630H |
|---|---|---|---|
| Frame Size | 125 | 250 | 630 |
| Insulation Voltage, Ui | AC800V | AC1000V | AC690V |
| Rated Impulse Withstand Voltage, Uimp | 8kV | 8kV | 8kV |
| Rated Voltage, Ue | AC400V 50Hz | AC400V 50Hz | AC400V 50Hz |
| Rated Current, In (A) | 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, 125A | 125A, 160A, 200A, 225A, 250A | 315A, 350A, 400A, 500A, 630A |
| Pole | 3P / 4P | 3P / 4P | 3P / 4P |
| Contact Transfer Time (s) | 0.58 ±20% | 0.56 ±20% | 0.9 ±20% |
| Transfer Time (s) | 1.4 ±20% | 1.3 ±20% | 2.0 ±20% |
| Controller Type | B / D | B / D | B / D |
| Rated Short-Circuit Making Capacity, Icm (kA) peak | 17kA | 17kA | 26kA |
| Rated Limited Short-Circuit Current, Iq | 120kA | 120kA | 120kA |
Controller Functions
Functional comparison between B and D controller types.
| Item | B | D |
|---|---|---|
| Rated Working Voltage | AC230V / 400V 50Hz / 60Hz | AC230V / 400V 50Hz / 60Hz |
| Aux. Power Voltage | No | DC24V |
| Voltage Measure Range | No | 40~300V |
| Power Consumption | ≤10W | ≤10W |
| Working Positions | (I-ON, II-ON, 0-OFF, three working positions) | (I-ON, II-ON, 0-OFF, three working positions) |
| Operating Mode | Manual, Auto | Manual, Auto, Remote |
| Display Mode | LED Indicator | LED Indicator / LCD Display |
| Transfer Mode | Auto Transfer Auto Recovery | Auto Transfer Auto Recovery / Auto Transfer Without Auto Recovery |
| Under Voltage Range | No | Default 176V (with LCD 165V~218V Adjustable) |
| Over Voltage Range | No | Default 264V (with LCD 242V~298V Adjustable) |
| Over / Under Frequency | No | 40Hz~60Hz Adjustable |
| Exerciser Timer | No | Engine Exercier |
| Transfer Delay | No | No delay (With LCD 0~180s Adjustable) |
| Recovery Delay | No | No delay (With LCD 0~180s Adjustable) |
| Phase Lost Monitoring | Source I three phase, Source II single phase | (A / B / C / Both Three phase detect) |
| Generator Control | No | Yes (One set relay dry contact) |
| Fire-Linkage Control | DC24V | Forced 0-OFF position (Voltage-free input / feedback signal) |
| RS485 Communication | No | Yes |
| Installation Mode | Integrated (No display) | Integrated / Separated with display optional |
- Certification
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CE -
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PC class XSTNA Series Automatic Transfer Switch | Shihlin Electric
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