New Technique Distributed Solar System Protective Solar Panel Arc Fault Protection Circuit Interrupter

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Product Overview

Description



Introduction
FR-DCBS-AFC4C is solar AFCI (Arc Fault
Circuit Interrupter), which is mainly used in small sizes of distributed PV system, such as <10KW residential solar system. Its main function is to detect the arc fault of the PV strings and make the string cables in the state of no current when arc fault occurs.
If the arc fault is detected, it will issue an alarm signal by the indicator and Email. At the same time, the AC relay will be driven to break off the AC circuit between the inverter and the grid. So that the inverter will stop working to ensure that the DC circuit is in the state of no current, which can effectively prevent fire hazard. In addition, users can remotely monitor the state of arc box by the mobile phone APP, such as arc alarm, relay contact, current, etc.


Specification


Key Technical Specifications
Classification
Item
Parameter
Arc Detection
Maximum number of detection channels
4 channels
Maximum system voltage
DC1000V
Arc type
UL1699B(Type 1)
Current Measurement
Maximum number of detection channels
4 channels
Current range
-20A~ +20A
Imbalance offset
≤≦±0.1A
Temperature drift
≦±0.005A/℃
Linearity
≦1%FS
Local Display
Operating status indicator
1
Power Supply and Power Consumption
Input voltage of power supply
100-240VAC
Maximum input current
0.15A@100VAC
Maximum power consumption
≦15W
Environment
Operating Temperature
-30℃~ +60℃
Storage temperature
-40℃~ +85℃
Operating humidity
0~95%
Waterproof level
IP65




Products Description


LED Signal
There is a LED in the front of the FR-DCBS-AFC4C,which indicates the operating state of the product.
The green LED is on : The product is operating normally .
The green LED is off : The product is not operating or the arc faults occurred .


Features
• 1-4 PV strings each box supports • Arc fault detecting of each PV string
• Fonrich IP technology to self-adapt with different inverters • U L 1699B 2018 conformity
• The protection arc sensitivity is adjustable • WiFi internet connection, email alarm notification

Application
FR-DCBS-AFC4C is mainly used in small sizes of distributed PV system, such as <10KW residential solar system. The system consists of PV strings, arc fault protection box, inverter and grid, as shown in the figure below.




Principles of Design
1) Schematic Diagram
DC side: 4 PV strings are connected to the DC input terminals of the product. After passing through the arc fault detectors, the DC output terminals of the product are connected to the input terminals of the inverter.
AC side: The output terminals of the inverter are connected to the AC input terminals of the product, and after passing through the AC relay, the AC output terminals of the product are connected to the input terminals of the grid.






2) Work principle
If the arc fault is detected, the product will issue an alarm signal by the indicator and Email. At the same time, the AC relay will be driven to break off the AC circuit between the inverter and the grid. So that the inverter will stop working to ensure that the DC circuit is in the state of no current. After 2 minutes, the AC relay will be driven to turn on the AC circuit and then the entire circuit resumes normal operation.

Arc alarm strategy
1) Arc mode
We divide the arcs into Instantaneous Arc and Continuous Arc.
Instantaneous Arc
The arc duration does not exceed the Instantaneous Arc Time (IAT), and there is no arc occurring again within the Continuous Arc Time (CAT).
Continuous Arc
The arc duration exceeds the IAT, or the arc duration does not exceed the IAT, but the arc occurs again within the CAT.
2) Arc alarm strategy
1. Instantaneous arc alarm
If the arc intensity of any channel exceeds the channel alarm threshold, an arc alarm will be generated.
2. Continuous arc alarm
The product does not alarm when instantaneous arc is detected, but only when continuous arc is detected.
3) Arc alarm time
The calculation method of the arc alarm times of the channel: When an arc alarm occurs in any channel, the number of arc alarm times increases by 1. When arc faults occur in several channels at the same time, the number of arc alarm times only increases by 1. The product will automatically restart after 2 minutes.
However, when the arc alarm times is up to the value of the arc alarm time, the device must be restarted manually.


Inside Components
Description
Arc Fault Detector : Detect real-time the arc in the PV strings.
Main Control : Control the state of the product.
DC Terminals : PV strings input and output terminals.
AC Terminals : Inverter input and output terminals.


Installation
1. Scope of Delivery
Check the scope of delivery for completeness and any externally visible damage before installation. Contact your distributor if the scope of delivery is incomplete or damaged.




Position
Quantity
Designation
1
Arc Fault Protection Box
4
Fixture
4
Cylindrical screw


2. Requirements for Installation
DANGER
Do not install the product in areas containing highly flammable material or grass.
Do not install the product in potentially explosive atmospheres.
Disconnect the product from voltage sources and make sure it cannot be reconnected before working on the device.
CAUTION
Do not install the product in the area where can be touched unintentionally.
Take wall-mounted installation as an example to introduce:
A solid support surface must be available.
The ambient temperature range is -30℃ ~ +60℃.
The protection level of FR-DCBS-AFC4C is IP65, and it can be used in both indoor and outdoor environments.
The product should be installed such that the LED signal can be read off without difficulty.


Recommended installation clearances
If you maintain the recommended clearances,adequate heat dissipation will be ensured. Thus,you will prevent power reduction due to excessive temperature.
Maintain the recommended clearances to walls as well as to other products or objects.




3. Drilling Diagram


Users can drill the bore holes according to their own needs.The size diagram of
the holes is as follows.(Dimensions in mm)


4. Procedure


1) Remove the four screws on the product cover using a flat-blade screwdriver, and then remove the front panel.
2) Place the four fixtures under the four corners of the product bottom, put the screws into the holes.And then screw the four fixtures to the product using the screwdriver.





3) Place the product vertically on the wall and use the screws to attach the four
fixtures of the product to the wall.


Note: Install the front panel after completing the electrical connections in the fourth chapter.

Electrical Connection
DANGER
Before electrical connection, please make sure that FR-DCBS-AFC4C is not damaged and in a safe state, otherwise it may cause electric shock or fire.
CAUTION
Touch the cables of the PV array on the insulation only.
All electrical connections must meet the electrical standards of the country or region where they are located.
Please use the indicated electric wire and electric cable. Using electric wire and electric cable with no sufficient capacity or with no correct connection method will lead to machine breakdown, machine fire or electric shock.


1. DC Terminals
Connect the product, inverter and PV strings through the DC terminals as shown in the figure below.




Procedure


1) Strip the insulation of PV string cables.
L is the reference value of the exposed length of the conductor of the DC cables.
The length of L is recommended to be 8-10mm.

2) Pull up the handle of the DC terminals.


3) Insert the stripped conductor section into the connection port.
4) Press down the handle of the DC terminals.


2. AC Terminals(Single-phase three-wire connection)
Connect the product, inverter and grid through the AC terminals as shown in the figure below.




Procedure

1) Strip the insulation of the cables.
L is the reference value of the exposed length of the conductor of the AC cables.
The length of L is recommended to be 9-11mm.

2) Pull up the handle of the AC terminals.
3) Insert the stripped conductor section into the corresponding connection port.
4) Press down the handle of the AC terminals.



3. AC Terminals(Three-phase four-wire connection)
NOTICE
When wiring three-phase four-wire, the silkscreen mark of the AC terminals is not applicable, please follow the instructions for wiring.
Connect the product, inverter and grid through the AC terminals and N terminal as shown in the figure below.


Procedure
1) Strip the insulation of the cables.
2) Pull up the handle of the AC terminals.
3) Insert the stripped conductor section of the cables into the corresponding
connection port.
4) Press down the handle of the AC terminals.
5) Insert the stripped conductor section of the cables into the OT terminal or
U-shaped terminal, and then connect it to the N terminal.



Note: Cover the front panel of the product and fix it firmly with screws.


Operation
1. Checking before Operation
In order to ensure the normal operation of the arc safety protection box, a pre-operation inspection is required.
The product must be correctly installed.
All cables must be correctly connected.

2. Operation
Perform power-on operation to turn on the FR-DCBS-AFC4C.
The green indicator is on, and the product is in normal operation.

3. Clearing the Arc Alarm
When the green indicator is off, it proves that arc fault has occurred.
Press the indicator to clear the arc alarm.Then the green indicator will light again and the product will work.



Safety Precautions
To prevent personal injury and property damage, read this section carefully and observe all safety information at all times.

Requirements of operators
Operators must have the following skills:
Knowledge of how an arc fault production box works and is operated.
Training in how to deal with the dangers and risks associated with installing, using electrical devices and installations.
Knowledge of and compliance with this document and all safety information.

Installation
DANGER
Disconnect the product form voltage sources and make sure it cannot be reconnected before working on the device.
CAUTION
Please do not touch the other parts inside in addition to the terminals during the installation process.
NOTICE
Please read this user manual carefully before installation. If the equipment is damaged resulting from violation of the regulations specified in this document, our company has the right not to guarantee the quality.
The distance between FR-DCBS-AFC4C and the object should meet the conditions.

Electrical connection
DANGER
Before electrical connection, please make sure that FR-DCBS-AFC4C is not damaged and in a safe state, otherwise it may cause electric shock or fire.
CAUTION
Touch the cables of the PV array on the insulation only.
All electrical connections must meet the electrical standards of the country or region where they are located.
Please use the indicated electric wire and electric cable. Using electric wire and electric cable with no sufficient capacity or with no correct connection method will lead to machine breakdown, machine fire or electric shock.

Operation
DANGER
FR-DCBS-AFC4C has high voltage during operation, which may cause electric shock or death in severe cases. Please operate strictly in accordance with the safety precautions listed in this manual and other related documents.





FR-DCBS_Catalog
Model
PV Strings Quantity
Arc Interrupter Mode
Communication
Mobile App
Comments
DC Side Contactor
AC Side Contactor
RS485
WiFi
FR-DCBS-AFS4B
4
Yes
Yes
Support Parallel Ext
FR-DCBS-AFS6B
6
Yes
Yes
Support Parallel Ext
FR-DCBS-AFS8B
8
Yes
Yes
Support Parallel Ext
FR-DCBS-AFC4C
4
Yes
Yes
Yes
Residential Market
FR-DCBS-AFC12A
12
Yes


Company Information






0.0203 s.