Confirm the required system voltage, pole configuration, current rating and source type before ordering. Regional voltage and utility/generator markings should be specified separately from the main ATS model.
Automatic Transfer Switch
100A / 125A PC-Class Automatic Transfer Switch – UH-PW-AT02
Model UH-PW-AT02
UH-PW-AT02 is a PC-class automatic transfer switch platform designed for fast transfer between normal and backup AC power sources. Available in 100A and 125A versions with 2P, 3P and 4P configurations depending on the selected model, it supports automatic and manual operation with supplier-specified millisecond-level transfer performance.
- 100A / 125A
- 2P / 3P / 4P
- Millisecond-Level Transfer
Rated Current
100A / 125A
Electrical Class
PC Type
Pole Configuration
2P / 3P / 4P
Confirm the voltage configuration before ordering; fast transfer is not equivalent to UPS-style zero-interruption power.
Overview
Product Overview
UH-PW-AT02 is a PC-class automatic transfer switch designed for applications requiring faster source changeover than conventional breaker-type ATS platforms. The product family includes 100A configurations and a 125A configuration, with 2P, 3P and 4P arrangements available according to the selected version.
Automatic and manual operating modes are integrated into the same compact platform. Regional and source-specific versions are available with different voltage configurations and front-panel markings for utility, backup and generator applications. The supplier specifies millisecond-level transfer for this PC-class series.
Features
Key Product Features
100A / 125A
2P / 3P / 4P
Millisecond-Level Transfer
PC-Class Transfer Platform
The PC-class switching structure is designed primarily for source transfer and load switching rather than breaker-style overcurrent tripping.
Fast Source Transfer
The supplier specifies millisecond-level transfer performance for the NLQ3/NLQ4 platform, providing faster source changeover than the 1–2 second CB-type UH-PW-AT01 platform.
Automatic and Manual Operation
Automatic transfer control is combined with a manual operating mechanism for commissioning, maintenance and manual source selection.
Technical Data
Technical Specifications
Review the complete technical parameters for product selection and project verification.
Common Characteristics
| Parameter | Value |
|---|---|
| Product Type | Automatic Transfer Switch |
| Rated Voltage | AC 110 / 230 / 380 V |
| Rated Current | 100A / 125A |
| Electrical Class | PC Type |
| Operating Mode | Automatic / Manual |
| Frequency | 50 / 60Hz |
| Transfer Time | Millisecond-level, supplier stated |
| Pole Configuration | 2P / 3P / 4P |
| Power Sources | Utility / Backup / Generator |
Selection
Choose the Correct UH-PW-AT02 Configuration
| Model | Current | Poles | Typical Configuration |
|---|---|---|---|
| UH-PW-AT02-100A-2P | 100A | 2P | Single-phase / project-specific |
| UH-PW-AT02-100A-3P | 100A | 3P | Three-pole switching |
| UH-PW-AT02-100A-4P | 100A | 4P | Four-pole switching |
| UH-PW-AT02-125A-2P | 125A | 2P | Higher-current 2P |
| UH-PW-AT02-125A-4P | 125A | 4P | Higher-current 4P |
Applications
Where This Product Is Used
Energy Storage Systems
DC protection, isolation and switching components for battery energy storage and related DC power systems.
Residential Electrical
Protection, switching and backup-power components for residential distribution boards and low-voltage electrical systems.
Solar PV Systems
Protection, connectivity and distribution components for photovoltaic arrays, string circuits and related solar DC systems.
UH-PW-AT02 is intended for residential, commercial and light industrial AC distribution systems requiring automatic transfer between normal and backup supplies with a shorter transfer interval. Typical source combinations include utility-to-utility and utility-to-generator arrangements, provided the voltage, frequency, pole configuration and connected load are compatible with the selected ATS version.
Installation
Installation Guidance
1. Confirm the required system voltage, rated current, pole configuration and source arrangement before installing UH-PW-AT02.
2. Fully isolate both the normal power source and backup power source before wiring or servicing the automatic transfer switch.
3. Install the ATS securely inside the electrical enclosure and provide sufficient clearance for incoming conductors, outgoing load conductors, control wiring and manual operation.
4. Connect the normal source, backup source and load conductors according to the wiring diagram supplied for the selected 2P, 3P or 4P configuration.
5. For generator versions, connect the generator-related control terminals only according to the wiring diagram supplied with that specific configuration.
6. Verify conductor arrangement, terminal tightness and source polarity or phase sequence before energizing either input source.
7. Test Manual mode first and confirm correct transfer between Source A and Source B.
8. Set the ATS to Automatic mode and perform a controlled source-failure test to verify automatic transfer and return operation.
9. Although the supplier specifies millisecond-level transfer for this PC-class platform, connected loads must still tolerate a short supply interruption. Do not treat the ATS as a UPS or zero-interruption power source.
10. Installation and commissioning should be performed by qualified electrical personnel in accordance with the applicable electrical system and local requirements.
Important Notes
Confirm the voltage configuration before ordering; fast transfer is not equivalent to UPS-style zero-interruption power.
FAQ
Frequently Asked Questions
What is the difference between UH-PW-AT01 and UH-PW-AT02?
UH-PW-AT01 is a CB-type 16–63A platform with a supplier-specified 1–2 second transfer time. UH-PW-AT02 is a higher-current PC-class platform available in 100A and 125A configurations with supplier-stated millisecond-level transfer.
Is UH-PW-AT02 really uninterruptible?
No. The supplier describes the platform as millisecond-level fast transfer, but a transfer switch still changes the load from one source to another. UHCCY does not classify it as a zero-interruption or UPS power system.
Are 110V versions available?
Yes. The supplier provides dedicated product pages for 110V utility and generator versions. Because some parameter blocks on those pages were copied from the standard-voltage version, the exact ordered voltage configuration should be confirmed before production.
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Need More Information About This Product?
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