BLUE JAY AFR-M is an arc flash protective relay designed to safeguard electrical equipment from arc flash hazards. It utilizes advanced optical fiber sensing technology to detect arc flash events accurately and rapidly, initiating protective actions to minimize damage and ensure personnel safety. With its comprehensive set of features, BLUE JAY AFR-M offers enhanced protection and reliability in various industrial and commercial applications.
BLUE JAY AFR-M is an arc flash protective relay designed to safeguard electrical equipment from arc flash hazards. It utilizes advanced optical fiber sensing technology to detect arc flash events accurately and rapidly, initiating protective actions to minimize damage and ensure personnel safety. With its comprehensive set of features, BLUE JAY AFR-M offers enhanced protection and reliability in various industrial and commercial applications.
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China
Arc Flash Protective Relay
Installation Instruction
Version:1.0
Revision 2023.04
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 0 -
1. Preparation before installation
1. Determining the installation position and on-site inspection
According to the project configuration, check the geographical distribution of the switchgear, and
determine the installation positions of the host, CT, and optical fiber. It is usually installed in the
busbar PT cabinet or excitation PT cabinet with sufficient space. During the on-site inspection, it is
required to check to prevent other items from occupying the space.
2.Determining the path of the arc probe fiber
The busbar is located in the later part of the switchgear, and the optical fiber needs to pass through
the front half to connect to the host. It needs to drill holes on the bulkhead to pass through the
optical fiber, and connect to the secondary wiring hole/bus duct on the top of the switchgear to the
host.
3. Using PVC pipe to protect the optical fiber
If the switchgear is divided into two rows, some optical fibers need to be connected to the host
through the cable trench. To protect these fibers, use PVC pipe to pass them through. Therefore, it
is necessary to prepare a suitable PVC pipe as a fiber optic conduit.
4.Measuring fiber lengths and determine required quantities
After determining the positions of the host, CT, and optical fiber, it needs to measure the length of
the optical fiber from each arc starting probe to the host and summarize the number of required
fibers. When repairing on site, it needs to bring the correct amount of fiber.
5.Planning current CT wiring mode
Planning the current CT wiring method before construction, including using a group of CTs alone
or using a group of CTs in series with other protection CTs.
6.Preparing the list of items for installation
Screws, nuts, gaskets and shrapnel needed to fix the probe bracket; cable ties needed to tie the
optical fiber; positioning pieces needed to fix the optical fiber; PVC pipes required for laying the
optical fiber; tightening screws The required wrench and pliers; and the three tools needed to make
fiber optic splices (wire strippers, crimping pliers, and cutting pliers). In addition, you need to
prepare the flash and its charger as experimental supplies.
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 1 -
2. On-site installation
1. Arc light probe installation principles
The installation principle of the arc light probe is to make the busbar in the switchgear completely
within its monitoring range, preferably placed in the upper left corner or upper right corner facing
the busbar. Refer to the figure below, the left picture is the busbar in the switchgear, and the right
picture is the arc probe placed in the upper right corner of the switchgear.
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 2 -
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 3 -
2. Steps and Precautions for Installing Optical Fiber on the Switchgear
Open front door of switchgear, use electric drill to bore hole in front partition for optical fiber. Hole
may be rough and have burrs when fiber passes through. To prevent damage to fiber's outer skin,
use combustion casing with resistance. See figure below for details.
3. Optical fiber bundling method and schematic diagram for connecting the probe
All the optical fibers connected to the probe must be bundled neatly, pass through the wiring holes
in turn, and finally connected to the master control unit or arc unit. The following two pictures are
for reference.
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 4 -
4. Optical fiber numbering principles
Each optical fiber needs to be numbered, usually based on the number of the switchgear or the
method of describing the position of the probe. After numbering, use label paper or numbering
tubes to stick (or wrap) on the optical fiber. In this way, when the arc protection is activated, we can
quickly lock the specific switchgear according to the probe address reported by the device, and
quickly find out the fault location.
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 5 -
5. Probe Installation for Connecting Busbars
Sometimes due to space constraints, the busbars need to be divided into 2 rows, so there must be
connecting busbars above the 2-section busbars, and probes need to be installed here. Usually, 2
contrasting probes can be installed at both ends of the busbars. See the following figure for details.
6. Tips and Considerations for Installing Probes
When installing the probe, if the space of the connection cabinet is small, the installation location
should be reasonably selected, and the probe should be kept away from the busbar as far as
possible, and the search angle should be maximized. Use switchgear screw holes instead of
cutouts. The optical fiber routing should also follow the trend. If there is a small hole at the corner
to facilitate the passage of the optical fiber, there is no need to open another hole.
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 6 -
Panel installation method and size (unit: mm)
User Manual
Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 7 -
7. Fiber laying skills
The optical fiber needs to be protected in a PVC pipe through the cable trench, and the corner is
connected with a hose. See Figure below.
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BLUE JAY AFR-M is an arc flash protective relay designed to safeguard electrical equipment from arc flash hazards. It utilizes advanced optical fiber sensing technology to detect arc flash events accurately and rapidly, initiating protective actions to minimize damage and ensure personnel safety. With its comprehensive set of features, BLUE JAY AFR-M offers enhanced protection and reliability in various industrial and commercial applications.
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