RSD PEFS-EL Series Array-Level Rapid Shutdown

1. Scope and General

This manual is exclusively for the PEFS-EL Series Array-level Rapid Shutdown device.

? Note: The manual is used for Version V1.0 (2021-10-15, First Edition) and V2.0 (2022-04-20, Content Modified).

2. Important Safety Precautions

⚠️ WARNING: Components in the installations are exposed to high voltages and currents. Follow these instructions carefully to reduce the risk of fire or electric shock.

The following regulations and standards are considered applicable and mandatory to read prior to the installation of electrical equipment:

• ⚠️ Connection with the main circuit: Wiring should be done by professional qualified personnel. Wiring should be done after confirmation of complete disconnection of input power supply. Wiring should be done after installation of the breaker body.
• ? International Standards: IEC 60364-7-712 Electrical installations of buildings - Requirements for special installations or locations - Solar Photovoltaic (PV) power supply systems.
• ? Local building regulations.
• ⚡ Guidelines for lightning and overvoltage protection.

? Note:

• It is essential to uphold the limits for voltage and current in all possible operating conditions. Also, keep in mind the literature on correct dimensioning and sizing of cabling and components.
• The installation of these devices may only be performed by certified technical personnel.
• The wiring schematics of the Firefighter Safety Switch can be found at the end of this manual.
• All installation works should be tested in accordance with relevant local legislation at the time of installation.

3. About Rapid Shutdown

3.1 Intended Use of the Rapid Shutdown

The Rapid Shutdown has been especially developed as a safety device for direct current (DC) photovoltaic installations. The DC disconnect switch is used to disconnect the connected strings of the installation in case of an emergency situation, such as a fire.

3.2 Location of the Rapid Shutdown

The Rapid Shutdown needs to be placed as close to the solar panels as possible. Due to its enclosure, the switch is protected against external influences like dust and moisture. The whole set-up conforms to IP66, which makes it suitable for outdoor usage when needed.

4. Operation

4.1 Normal Operation

▶️ The PEFS will automatically switch to the OFF position, breaking the DC connection between the solar panels and the inverter, after the AC power to the PEFS is interrupted for longer than five seconds.

▶️ The PEFS will automatically switch to the ON position, restoring the DC connection between the solar panels and the inverter, once the AC power to the PEFS is restored for longer than five seconds.

4.2 Special Operation

? If the temperature inside the PEFS enclosure exceeds 70°C, the PEFS will automatically switch to OFF to protect the internal components and create a safe situation.

⚙️ When the installation is checked and the PEFS is not affected, it can be switched ON again by removal and re-applying the AC voltage to the PEFS.

❌ The PEFS will also automatically switch to OFF if there is an internal failure.

⚙️ If an internal failure occurs, please try to reset the PEFS by removal and re-applying the AC voltage to the PEFS.

5. About PEFS Array-level Rapid Shutdown

5.1 Model Description

The model description follows a code structure: 2: Generation, P: Plastic enclosure, 4: Number of poles, 55: Frame Rating, EL: Product Code, FS: Design Code, PE: Brand Code.

5.2 Technical Parameters

5.3 Wiring Options

6. Installation

6.1 Installation Requirements

Open the box, take out the PEFS, read this manual, and prepare a cross/straight screwdriver.

6.2 Installation Steps

1. Pull out the product bottom bracket to both sides.
2. Mount the switch enclosure on the wall.
3. Wire the power AC connection to the terminals.
   Wire Color: According to American and Europe standard requirements - American standard: L Black, N White; G Green. Europe standard: L Brown, N Blue; G Green&Yellow.
   ? Note: FB1, FB2 are used to remotely display the on and off states of the switch. When the switch is closed, FB1 is connected to FB2; when the switch is open, FB1 is disconnected from FB2.
   ? Emergency Button (Optional)
   Resistor is selected according to supply voltage, to ensure circuit current less than the rated current of the Indicator light and 320mA.
4. Wire the string cables to the interface.
   ✅ Note: Please follow the marks (1+, 1-, 2+, 2-) for PV wiring.
5. Note the installation environment (See the schematic on the next page).
   ❌ Do not expose to direct sunlight.
   ❌ Do not expose to rain and snow cover.
   ❌ Do not be in direct contact with (continuous) ingress water.
   ?️ The installation site must have good ventilation condition.

6.3 Diagram Description

The diagram illustrates a typical photovoltaic (PV) system configuration. On the left side, multiple PV arrays are connected in parallel. Each PV array is composed of solar panels connected in series, indicated by '+' and '-' terminals. These combined arrays are then connected to the Firefighter Safety Switch (the PEFS-EL Series device). From the Firefighter Safety Switch, the DC power is routed to the Inverter. The Inverter is subsequently connected to a Distribution box, which then interfaces with the main Grid. An optional Emergency Button is also depicted, which can be locked or unlocked and is wired to the Firefighter Safety Switch.

6.4 Test

1. ✅ Step 1. Activate AC power circuit. PEFS switches on.
2. ⏳ Step 2. Wait one minute. UPS is charging. (Approx. 35 sec. to Approx. 1 min)
3. ✅ Step 3. Deactivate AC power circuit. PEFS will switch off in about 7 seconds. Red LED light off. (AC POWER OFF)
4. ✅ Step 4. Activate AC power circuit. PEFS switches on in 8 seconds. Red LED light on. (AC POWER ON)
5. ✅ Step 5. Test is completed.

7. Aftersales Service and Warranty

7.1 Warranty

? Note: On the premise of user's compliance with reservation and use specifications of the breaker, for breakers whose delivery date is within 60 months from now and whose seals are intact, PROJOY will repair or replace any of these breakers which are damaged or cannot work normally due to manufacture quality.

? Note: However, for faults caused by the following reasons, PROJOY would repair or replace the breaker with a charge even if it is still in warranty:

• ⚠️ Due to incorrect use, self-modification, and improper maintenance, etc.
• ⚠️ Use beyond the requirements of standard specifications.
• ⚠️ After the purchase, due to falling and damage during installation, etc.
• ⚠️ Earthquakes, fires, lightning strikes, abnormal voltages, other natural disasters and secondary disasters, etc.

7.2 Aftersales Service

• ? Please contact the supplier or Projoy Electric's after-sales service department in case of failure.
• ✅ During the warranty period: For failures caused by the company's manufacturing problems, free repairs and replacements.
• ? After the warranty period expires: If the function can be maintained after repair, a paid repair can be made; otherwise, a paid replacement is available.

8. Contact Us

Projoy Electric Co., Ltd.

Tel: +86-512-6878 6489

Web: https://en.projoy-electric.com/

Address: 2nd Floor, Building 3, No. 2266, Taiyang Road, Xiangcheng District, Suzhou