How to isolate and protect a Battery Energy Storage installation?

Green Energy, Products

The Battery Energy Storage Systems market is booming. According to the International Renewable Energy Agency (IRENA) report, this sector is expected to grow by an average of 21-25% per year between 2021-2025, thanks to measures to improve the access to energy, the boost to the photovoltaic sector, the increase in domestic self-consumption and electrical mobility, some of the main uses and applications of this market.

Many companies and customers are already joining this need or opportunity to manufacture and install energy storage systems, with increasingly demanding requirements in terms of electrical protection and isolation of these facilities.

Telergon provides advice on how to choose the best load break switch and the best disconnector (for isolation) to protect battery energy storage installation. 

BATTERIES

One of the main suppliers in this sector are the manufacturers of chemical or electrochemical batteries (lithium, vanadium, sodium, zinc…), who are incorporating developments and improvements in raw materials to ensure effectiveness and lower environmental impact. These manufacturers supply the batteries, as well as the cells or modules (racks) and containers.

BATTERY PROTECTION UNIT (BPU)

Each module or battery rack has a Battery Protection Unit (BPU) that must have installed a switch up to 400 A, usually for 1000Vdc/1500Vdc, prepared to break or isolate the current in each rack installed in the containers or in a centralized electrical panel where the different modules are connected.

Serie S6
1P y 2P | 125A – 630A | 1000 V

Wide range of currents
Ready to motorise

Serie S7
2P | 400A – 500A | 1500 V

High performance DC switch with magnetic system

BATTERY CONCENTRATION UNIT (BCU)

The Battery Concentration Unit (BCU) is equipped with a main switch disconnector (on / off load) from 1000 A to 5000 A. For the maintenance of the container, it is recommended to install an isolation only disconnector which off load, but allows to isolate the container from the current for a safe and convenient maintenance.

Serie S5
4P | Up to 2000A | 1000 V DC21B
ON/OFF load

Isolation only 
1P-2P | 800A – 3150A | 1500Vdc 
Compact and flexible solution, with motorised option

POWER CONDITIONING SYSTEM

These bidirectional inverters are able to charge energy into batteries from a DC (for example, a photovoltaic plant) or AC generation source, and discharge it, when needed, for commercial, residential and industrial use in AC or DC.

Generally, they need to install a powerful main switch disconnector DC (1000 A or 1250 A) with manual or motorized operation, depending on the needs of the installation.

AC switch disconnectors may also be required, depending on the application, up to 800Vac for uses with string inverter technology.

Telergon has an extensive experience in green energy sector, especially thanks to our positioning and leadership in the photovoltaic sector, in which we offer our diverse and versatile product range to protect a battery energy storage installation.

La entrada How to isolate and protect a Battery Energy Storage installation? se publicó primero en Telergon.