Hardware operation

3.1 Commissioning the inverter

3.1.2Switching off and disconnecting the power supply

The entire system must be disconnected from the power supply before test and maintenance work can be carried out in the containers. Carry out these tasks in the sequence given below:

1.Press the OFF key briefly on the control panel of every inverter.

2.For reasons of safety, also press the Fast Stop button (if one is installed) in the inverter room.

3.Disconnect the external power supply (most commonly in the AC distribution cabinet) by opening the fuse switch disconnector or by switching off the miniature circuit breaker.

4.Open the AC-side and DC-side fuse switch disconnectors in all inverters and remove the fuses, including the fuse holder, or remove the fuse cartridge with a fuse tong. This means that the inverter cannot be switched on again (remember the five safety rules).

DANGER

The AC and DC connections are still live externally!

5.In order to disconnect the AC end completely from the power supply, the relevant medium-voltage transformer must be switched off at the medium-voltage switchgear. After switching off, open the medium-voltage isolator and close the medium-voltage grounding switch. The machine switching operations on the medium-voltage components must be performed via the power supply company or an authorized person.

6.In order to disconnect the DC end completely from the power supply, all relevant junction boxes of the generator and coupling boxes (if installed) must be disconnected. The disconnectors in the generator junction boxes and/or coupling boxes (if installed) can be switched under load. In contrast, fuse switch disconnectors must not be switched under load. Likewise, fuse cartridges in fuse holders must not be removed under load.

DANGER

Fuse switch disconnectors in the inverters and junction boxes must not be switched under load! Do not remove fuse cartridges when they are under load!

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Siemens SINVERT 350 manual Switching off and disconnecting the power supply
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350, SINVERT 350 specifications

The Siemens SINVERT 350 series is a high-performance, lightweight inverter system designed to optimize energy conversion in solar power applications. With a power rating of up to 350 kW, this inverter model is tailored for large-scale photovoltaic installations and commercial applications. Its key features and technological innovations make it a valuable addition to any renewable energy project.

One of the main features of the SINVERT 350 is its advanced grid management capability. The inverter is equipped with sophisticated monitoring systems that ensure compliance with various grid connection standards, enhancing stability and reliability for the operator. This ensures seamless integration with existing power grids while optimizing energy yield. Additionally, it supports various grid support functionalities, helping maintain grid stability during high-demand periods.

Another notable characteristic is its modular design. The SINVERT 350 allows for easy integration with other units, scaling effectively to meet the power needs of larger installations. This modularity not only enhances flexibility but also simplifies maintenance and reduces operational costs over time. Each unit can be easily accessed, which minimizes downtime during servicing.

The SINVERT 350 also features advanced cooling technology. With its robust thermal management system, the inverter operates efficiently even under high temperatures, ensuring longevity and reliability. The design minimizes losses due to heat, effectively enhancing the overall energy conversion efficiency.

In terms of safety, the SINVERT 350 is built with integrated protection mechanisms, including over-voltage and short-circuit protections. These safety features safeguard both the inverter and the connected photovoltaic modules, ensuring a secure operating environment.

Another highlight is the inverter’s compatibility with the Siemens Smart Grid solutions. This integration means users can access comprehensive monitoring and analytics tools, enabling real-time performance tracking and optimization of energy output. With built-in web-based connectivity, operators can manage the system remotely, gaining insights and facilitating proactive maintenance.

In conclusion, the Siemens SINVERT 350 series combines robust performance, innovative technologies, and reliable safety features to create a compelling choice for large-scale solar energy projects. Its advanced design ensures operational efficiency and adaptability, thereby enhancing the overall viability of solar energy as a sustainable power source.
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