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Your Premier Rapid Shutdown Device Supplier

 

ZJBENY is a trusted manufacturer of protective components for photovoltaic systems across the globe. Through our focus on solar DC protection design, production, and marketing, we can bring brand-building PV protection solutions.
In recent years, ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.

Why Choose Us?
Module-Level Rapid Shutdown with Emergency Button Switch for Fire Safety UL Listed NEC2017 690.12 BFS-11

Rich Experience

Our experience of working in the electrical industry for more than 30 years allows us to create solar DC components that comply with the latest DC standards. With the inheritance of 30+ years of experience in the research and production of DC protection products, we are continuously dedicated to the EV charging field.

ZJBENY Firefighter Safety Switch BFS-S

Broad Market

ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.

Single-In Microinverter BYM500

Wide Product Range

ZJBENY offers a full range of solar PV protection products and EV chargers for different solar PV, battery energy storage, and EV charging system. Our Main Product Lines: EV Charger, Rapid Shutdown Device, Microinverter, PV Combiner Box, DC Isolator Switch, DC Circuit Breaker, DC Fuse Holder, DC Contactor, AC Components, etc.

LifePO4 Energy Storage Battery Pack Wall-mounted

Leading Service

We independently complete the R&D, production, marketing, sales, and technical support processes. We satisfy your needs with our long warranty, technical support, and other value-added services.

What is Rapid Shutdown Device?

 

 

Rapid shutdown devices are a type of module-level power electronic (MLPE) or microinverter that are installed on the backs of solar modules. They are equipped with technology that can turn off and reduce voltage output throughout the solar system to adhere to PV Rapid Shutdown regulations.

 

Features of Rapid Shutdown Device

An Essential Safety Precaution

In sunny conditions, with a system working properly, panels are carrying live electricity. In most situations, the system is safe and its panels have conduits that run from one to another and to the inverter.

Certain Emergency Situations are Unpredictable

Some conduits can be damaged and expose others nearby to live electricity. This situation is dangerous for firefighters and other first-aid responders who need to access the area surrounding the system.

Avoid Danger

First aid responders can quickly cut off the power in the conduits, giving themselves safe access to the area around the system.

Types of Rapid Shutdown Device
SUNSPEC MODULE-LEVEL RAPID SHUTDOWN DEVICE NEC2020 BFS-21

Rapid Shutdown with Microinverters and Power Optimizers

At the moment, a majority of residential solar panel systems are installed either with microinverters, or power optimizers. As module level power electronics (MLPE), both microinverters and power optimizers operate at the solar panel site, and include built-in rapid shutdown capabilities.

Solar Panel Rapid Shutdown Junction Box BFS-31

Rapid Shutdown with String Inverters

If you are buying a solar panel system that uses a string inverter, you would also need to have module level power electronics (MLPE) installed so as to comply with NEC regulations.
In this regard, you have two options:
Connect your string inverter to power optimizers.
Connect your string inverter to a MLPE product designed specifically for rapid shutdowns. These can sometimes be more cost effective than installing power optimizers or microinverters.

 

Rapid Shutdown Quick Installation Guide

（Remember to ensure the power line is off and wear PPE (personal protective equipment) insulated.）

 

 

1000V DC Combiner Box BHS-6-3

Decide Which Location to Install Your Rsd.

You can install RSD horizontally or vertically, depending on your preference.

DC Mini Circuit Breaker 1200V 50A UL Listed BB1-63

Make Sure You are Connected

When you're ready to wire the RSD input and output, make sure that the equipment grounding conductor (EGC) from the array is linked in the inverter. The EGC should connect the inverter and array for the inverter's ground fault protection to operate.

1000V DC Combiner Box BHS-6-2

Look for the Input Wires

Look for the input wires on the side of RSD marked as "Input" and connect them to the PV array. The positive end of the PV array should be connected to the +RSD input wire, while the negative end of the PV array must be linked to the -RSD input wire.

SOLAR DC STRING BOX BHS-2/2

Then Look For the Output Wires

Connect the RSD output wires t0 the inverter inputs. The +RSD output wire must be linked to the positive DC input terminal, and the -RSD output wire must be connected to the negative DC input terminal.

AC EV WALLBOX WITH T2S SOCKET

Install the 24V Power Supply

Open the PV system AC disconnect switch and the PV breaker first to make sure the inverter is disconnected from the grid. Note that the power supply of RSD should be connected to a 2-wire 208V line-to-line or 3-wire 240V line-to-line inverter output.

AC EV WALLBOX WITH T2S SOCKET

For Multiple RSD installations

Simply repeat the wiring steps to connect the second RSD control circuit to the second output position on the power supply.

22KW SMART EV CHARGER WITH DLB FUNCTION AND PEN FAULT DETECTION

No More than 30VDC

Within the ten-foot perimeter of the PV array, DC voltage must be lowered to no more than 30Vdc, and power to <240VA, within 30 seconds. This is to comply with NEC 690.12 rapid shutdown requirements.

22KW SMART EV CHARGER WITH DLB FUNCTION AND PEN FAULT DETECTION

Test the RSD System

When the PV system has been installed, test the RSD system. Check if the inverter DC input drops to less than 30 Vdc within 30 seconds after AC is removed. If it is, then your RSD installation is a success.

Tips for Rapid Shutdown Device

 

 

Unsafe

If your system was installed before the rapid shutdown was implemented, it does not pose risk to you or the building. However, it is worthwhile to install the rapid shutdown switch as per the local guidelines of your state. Not all inverters support the rapid shutdown, so you need a professional to help you with it.

 

Advised to Get A Professional

This way you won't have to worry about the changing codes of your state. You can easily get an updated version of the system in accordance with the current code of safety of the PV system. This will help you get through the inspection without any glitches.

 

Possible to Install by Yourself

If you have the right guidelines and right tools for it. If you choose to install the system by yourself, make sure that you abide by all the rules of your local state regarding the rapid shutdown device.

 

 

Certifications

 

 

We have the UL1741 mark, certification issued by Underwriters Laboratories, the most important for system interconnection tests in the USA. ZJBENY also holds SAA, CB, CE, TUV, ISO, RoHS certifications.

productcate-1-1

 

Contact US

                       If you have any enquiry about quotation or cooperation, please feel free to email us at benyi@zjbeny.com, or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.

                       TEL: +86-577-57177008
                       FAX: +86-577-57177007
                      Address: Changjiang Rd, Wenzhou Daqiao Industry Park, Yueqing, Wenzhou, Zhejiang, China, 325603

 

Frequently Asked Questions

Q: What are the requirements for rapid shutdown?

A: Rapid shutdown is a National Electrical Code (NEC) requirement for controlled conductors within PV systems on or in buildings. The requirement was first introduced in the 2014 NEC and has evolved in more recent iterations of the Code.

Q: What is the purpose of the rapid shutdown push button?

A: Rapid shutdown is an electrical safety requirement set for solar panel systems by the National Electrical Code (NEC). Simply put, it provides a way to quickly de-energize a rooftop solar panel system.

Q: Is rapid shutdown required for off grid solar?

A: Most electrical systems are DC loads with no grid connection. But being off-grid doesn't exempt solar wiring from NEC residential requirements, which means that technically even off-grid solar arrays on a roof would need to be equipped with module-level rapid shutdown.

Q: Do I need rapid shutdown?

A: Rapid shutdown is a requirement of the National Electrical Code, or NEC. Every three years, the NEC releases a set of requirements for safe electrical systems. The NEC is not federally mandated, and each state adopts the code at its own time and discretion.

Q: What is a rapid shutdown box?

A: Rapid shutdown is a safety regulation put forth by the National Electrical Code (NEC) requiring solar panels to have switches for cutting off electricity running through your system. Rapid shutdown reduces the voltage of electrical conductors found in wires and cables, protecting your home from quickly catching fire.

Q: What is the problem that is solved by rapid shutdown?

A: Rapid shutdown provides a safe way for solar installers or firefighters to halt or reduce the voltage and current from a photovoltaic array, allowing them to work safely and productively while avoiding electrical hazards.

Q: When did rapid shutdown start?

A: Rapid shutdown was first introduced in the 2014 National Electrical Code (NEC) with the intent of providing a simple method for fire fighters to de-energize solar system DC conductors easily to ensure a safe condition on the roof of a building during a fire.

Q: Which of the following is not permitted to be used as a rapid shutdown initiation device?

A: A service disconnect is NOT permitted to serve as a rapid shutdown initiation device.

Q: What is the NEC code for rapid shutdown?

A: PV system circuits installed on or in buildings shall include a rapid shutdown function to reduce shock hazard for emergency responders in accordance with 690.12(A) through (D).

Q: What happens if the solar grid shuts down?

A: The inverter runs to a smart meter that records the amount of energy you use, and also the excess solar energy that is sent back to the utility. So if the grid shuts down, so will your solar panels.

Q: What is the purpose of automatic shutdown devices?

A: An automatic safety shutdown not only increases energy efficiency but it can also greatly reduce the risk of danger. With very limited hardware, an intelligent shutdown can be put in place to avoid any accidents.

Q: What is the function of rapid shutdown device?

A: Rapid shutdown is an electrical safety requirement set for solar panel systems by the National Electrical Code (NEC). Simply put, it provides a way to quickly de-energize a rooftop solar panel system.

Q: What is a rapid shutdown of PV systems?

A: Rapid shutdown is the ability to reduce the voltage and current in the PV system to a safe level within 10 seconds of initiating a shutdown command. The NEC defines two zones for rapid shutdown: zone 1 and zone 2. Zone 1 covers the PV array and the conductors within 1 foot of the array.

Q: What does the junction box do on a solar panel?

A: Solar panel junction boxes are vital components of any solar energy system, providing necessary connections for the solar panels and other components of your system. They also provide important safety measures to protect your home or business against safety hazards like electric shocks.

Q: What are the different types of solar junction boxes?

A: There are two main types of solar junction boxes: non-potted and potted. The ordinary junction box is sealed with a silicone sealing ring, and the glue junction box is filled with two-component silicone to pot, in order to prevent outdoor aging, most of them are now filled with glue junction box.

Q: What is the little box on the back of a solar panel?

A: A junction box at the back of a solar panel is the key interface to conduct electricity to the outside. If water or dust seeps into the junction box enclosure, the bypass diodes inside can become short-circuited and burn out.

Q: Do I really need a junction box?

A: Wherever you have an electrical connection, that connection needs to be enclosed and protected. Anywhere you have wires spliced together, you need a junction box. Building codes require this protection because contact between wires can cause a spark. That's dangerous.

Q: Why would you need a junction box?

A: A junction box is an electrical enclosure that houses one or more wiring connections. The box protects the connections, which usually contain vulnerable points such as wire splices, from environmental conditions and accidental contact.

Q: What is the difference between emergency stop and emergency switch off?

A: In the case of the emergency stop, the hazardous movements are stopped. In the case of the emergency switching off, power to the system is switched off, which is a requirement for electrical hazards (electric shock).

Q: How does emergency shutdown system works?

A: Typically, the ESD works in fail-safe mode, that is in a deactivated state of any digital sensor (input) or actuator (output). Therefore, the detection of failures of critical components of the system and field inputs/outputs must lead the plant to a safe condition.

Our company is one of the leading module level rapid shutdown manufacturers and suppliers in China, providing the best customized service. Welcome to wholesale high quality module level rapid shutdown for sale here and get quotation from our factory.

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