How To Purchase ATS Dual Power Automatic Transfer Switch

Host 1: Hello, today we'll be discussing the core considerations for purchasing an ATS controller for a generator set.

Host 2: Many people feel lost when purchasing one. Actually, the core issue is quite simple: choose between an integrated unit and a separate unit, and then match the corresponding electrical and communication parameters. Today, we'll clarify this step by step.

Host 1: So, what's the first step?

Host 2: The first step is to clarify your needs and determine which type to choose. Currently, the mainstream is the integrated type, which integrates the controller directly into the switch. This is suitable for newly purchased equipment or scenarios with limited installation space. No additional wiring or debugging is required, resulting in higher reliability. Many data centers use this type, with a standard switching time controlled within 50 milliseconds.

Host 1: When should you choose a separate unit?

Host 2: A separate unit means the controller and the switch body are separate. This is more suitable for upgrading existing projects. For example, if you already have a switch and only need to upgrade the control logic separately, or if there are special requirements for the installation location, a separate unit offers more flexibility.

Host 1: After choosing the type, is the next step to verify the parameters? This is the easiest part to buy wrong, so let's discuss it carefully.

Host 2: Yes, this step is crucial. All parameters must match the existing generator and power distribution system. First, there's the current and voltage. The rated current must be at least 1.25 times the total load current to handle the inrush current generated when the generator starts. The voltage must match the system, and you also need to confirm whether to choose 3-pole or 4-pole. A shared neutral line requires 3-pole, while a generator requiring separate grounding requires 4-pole.

Host 1: Besides current and voltage, what other parameters should we pay attention to?

Host 2: Next, we need to check the communication protocol and confirm the communication method with the generator set. The two most common are dry contact (two-wire starting, generally universal) and MODBUS for remote monitoring. Finally, we need to confirm the operating mode. At the very least, it must support switching between mains and generator power so that the generator can automatically start during a power outage. Other options, such as automatic transfer and automatic recovery, can be selected according to your needs.

Host 1: After checking the parameters, the last step is to choose the brand and purchase channel, right?

Host 2: That's right, different needs call for different brands. For critical load scenarios with high reliability requirements, international brands like Eaton, ABB, and Schneider Electric are good choices. If you want professional generator set control functions, brands like Deepsea and Comai, which specialize in controllers, offer more comprehensive features. If you prioritize cost-effectiveness and convenient after-sales service, domestic brands like Bozhan are excellent options, with extensive after-sales service networks and reasonable prices.

Host 1: Are there any tips for the final procurement process?

Host 2: It's actually quite simple. You can send photos of your existing generator set brand, power rating, and the current ATS model to the supplier so they can help you with final matching confirmation. This can avoid many potential errors.

Host 1: In conclusion, purchasing an ATS controller involves three steps: first, choose an integrated or separate type depending on whether you're buying a new one or upgrading; second, carefully check key parameters such as current, voltage, communication protocol, and operating mode; and finally, choose a suitable brand based on your needs. If unsure, ask the supplier for confirmation.

Host 2: By following these steps, you can select a reliable and compatible controller.