Mitigate Electrocution of Birds; use Perch Deterrent by Indolite Devices Private Limited.

Perch Deterrent Overview
Perch Deterrent Model 575x1120 for birds with leg length exceeding 12 inches
Model; Perch Deterrent 575x1120 For Birds With Leg Length Above 12 in
Perch Deterrent PD300x300 For Peackocks and raptors & Large Birds
Model; Perch Deterrent PD300x300 For Peackocks and raptors & Large Birds
Bird Guard (BS5Nv2) for Small Bird Perch Prevention
Model; Bird Guard- BS5Nv2 For Small Birds

Bird Guard - Perch Deterrent for Power Transmission Lines

Protect Birds. Protect Power Infrastructure. Protect India.

Indolite Devices Pvt. Ltd. is India's trusted manufacturer of Perch Deterrents (Bird Guards) and Solutions for Mitigating Bird Electrocution for high-voltage transmission lines, substations, and power grid infrastructure.

Large birds like peacocks, vultures, eagles, kites, and storks often perch on transmission tower cross-arms. During take-off, their wide wingspans can contact live conductors-while their feet are grounded on tower, causing fatal electrocution, power outages, power tripping and grid instability.

Introduction

Indolite™ Perch Deterrent is the most effective and economical way to prevent birds from perching on transmission towers, insulators, and cross arms. This innovative solution has proven to be a boon in preventing tripping and breakdowns caused by birds.

Indolite™ Perch Deterrent is a world-class product designed to tackle the menace of birds without harming them. Perching of birds on transmission lines and towers can cause significant issues, particularly the electrocution of large birds such as peacocks, raptors, kites, and the Great Indian Bustard.

This device is specifically engineered to deter birds, especially large species, from perching on power transmission towers. It is non-fatal and humane, ensuring that birds are dissuaded from sitting on transmission lines and towers without being harmed.

The height and inaccessibility of transmission towers make them ideal perching grounds for birds. These high vantage points provide clear views for birds and also create protected zones, away from the reach of predators.

Features

Indolite™ Perch Deterrent is designed to prevent birds from perching in unwanted places. This product is non-fatal and humane, ensuring that birds are deterred without harm.

The investment in Indolite™ Perch Deterrent pays off within a few months, and the product continues to deliver results for years. We are confident that once you install this device, you will find it invaluable.

Advantages
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1. Helps in Saving Avian Species
By installing this device, we can prevent the electrocution of birds.
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2. Cost Saving Due to Power Line Breakdowns
Bird-related power line tripping and breakdowns are common problems that this device helps mitigate.
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3. Easy Installation
The installation process is straightforward and requires no special training. Tailor made clamps make installation easy and rugged.
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4. Maintenance-Free
There are no post-installation expenses, and the device requires virtually no maintenance.
Technical Details
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5. Excellent Construction
Made of special-grade engineering plastic, the same material used for bulletproof screens and sports cars.
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6. Safe
Non-conductive, ensuring it does not interfere with electrical or communication transmission.
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7. Flame Retardant
The flame-retardant properties of Indolite™ help extinguish fires by itself.
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8. Non-Lethal
Does not kill or harm birds, simply deters them from perching in unwanted places.
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9. U.V. Protected
U.V. Stabilizers make it sun and weatherproof, ensuring it works well in snow, rain, and storms. It can withstand extreme temperature variations from +100°C to -20°C.
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Chain Making Feature
Comes in a modular form, allowing the creation of chains of any length, which aids in installation and adds stability post-installation.

Technical Details — Product Range

575x1120 Long-legged birds — herons, storks, griffon vultures (leg length above 12 in)
PD300x300 Large birds — peacocks, eagles, vultures, kites & raptors
BS5Nv2 Small birds — pigeons, crows
10 YearsProduct Lifespan
0Maintenance Required
UVStabilised Material
Bird Size Guide — Perch Deterrent Model 575x1120

Model 575x1120 is engineered for birds with leg lengths exceeding 12 inches. The guard height of 575 mm (22.6 in) is designed to keep long-legged species clear of the perching surface.

Bird Approx. Leg / Perch Height* 575x1120 Guard Height
Himalayan Griffon Vulture 13 in (33 cm) 575 mm / 22.6 in
Grey Heron 18 in (46 cm) 575 mm / 22.6 in
White Stork 19 in (48 cm) 575 mm / 22.6 in
Painted Stork 22 in (56 cm) 575 mm / 22.6 in

*Approximate standing leg/perch height for reference; actual bird size varies by species and region.

India's Leading Bird Guard - Perch Deterrent Manufacturer

Indolite Devices Pvt. Ltd. is an ISO 9001:2015 certified manufacturer specializing in Bird Perch Deterrents (Bird Guards) and Avian Protection Systems for the Indian Power Sector.

Manufacturing Credentials

✅ ISO 9001:2015 Certified – Quality Management System

✅ Make in India Certified – 100% Indigenous Manufacturing

✅ MSME Registered – Government recognized "small" enterprise

Why Government Utilities Choose Indolite?

1. Direct Manufacturer – No middlemen, competitive pricing

2. Proven Track Record – 50+ utility references

3. Technical Support – Pre-bid consultation to post-installation

4. Fast Delivery – Ready stock + bulk production capacity

5. Tender Ready – Complete documentation & compliance

Frequently Asked Questions (Click to Expand)

Q1 How do bird perch deterrents prevent electrocution?
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Perch Deterrent/ Bird Guards function by creating a physical barrier that prevents birds from perching and roosting near live conductors. By blocking access to hazardous perching zones, they eliminate the risk of a bird's wings contacting energized conductors while its feet touch the grounded tower structure during take-off. This design ensures both electrical safety and bird protection.
Q2 Do bird guards require maintenance?
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No. Bird Guards are designed to last over 10 years with little to no maintenance.
Q3 Is the Indolite Perch Deterrent/ Bird Guard effective against both small and large bird species?
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Yes. Indolite's Perch Deterrent Model PD300x300 is engineered to discourage large birds—such as peacocks, eagles, vultures, kites, and other raptors—from perching on cross arms of transmission lines and electrical equipment.

Meanwhile, the Bird Guard Model BS5NV2 is chosen for economy and is highly effective at deterring smaller birds like pigeons and crows from nesting or perching on transmission lines. The Perch Deterrent Model 575x1120 is purpose-built for birds with leg lengths exceeding 12 inches, such as herons, storks, and griffon vultures. All Bird Guard models help prevent bird-related faults, equipment damage, flashovers, and power outages, while also ensuring the safety of the birds themselves.
Q4 Are Bird Guards Safe for Birds?
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Yes. Bird Guard/ Perch Deterrent is a humane solution. This deters... not harms or injures the birds. These help reduce the risk of nesting near electrical infrastructure, and prevent power outages caused by bird-related faults—all while ensuring bird safety.
Q5 What is the lifespan of bird guards?
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Indolite Bird Perch Deterrents are designed for a 10-year lifespan with zero maintenance. UV stabilization ensures long-term outdoor durability.

Get in Touch with Us

We're here to help with your bird protection needs

📞
+91-8 50 60 70 80 8
✉️
sales@indolite.com
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Conductor Name, Diameter & Technical Information — Download PDF

ACSR-metric Conductor Type and Diameter Indolite


This PDF provides complete technical details of ACSR (Aluminium Conductor Steel Reinforced) conductors used in overhead power transmission and distribution lines. It includes all essential engineering data such as conductor type, diameter, stranding, mechanical strength, aluminium and steel area, and electrical resistance.

The document lists multiple conductor categories in both Metric and British sizes, giving engineers and buyers accurate specifications required for designing and selecting the right conductor. Each conductor’s outer diameter, wire size, weight per kilometre, and rated strength are clearly shown to support safe and efficient installation of transmission lines.

This PDF is especially useful for utilities, EPC contractors, electrical engineers, transmission line designers, and procurement teams who need verified and reliable technical information for ACSR conductors.









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Supreme Court steps in to protect Great Indian Bustard

 


By- Krishnadas Rajagopal 



The Supreme Court on Monday swooped-in to intervene on behalf of the critically endangered Great Indian Bustards over the birds falling dead after colliding with power lines running through their dwindling natural habitats in Gujarat and Rajasthan.

A Bench led by Chief Justice of India Sharad A. Bobde will examine on a priority basis whether overhead power cables can be replaced with underground ones to save one of the heaviest flying birds on the planet.

Attorney General K.K. Venugopal, appearing for the Power Ministry, however submitted that only low voltage lines can go underground but not the high voltage ones.

The court found further that an alternative mechanism — to install flight bird divertors — to guide the birds away from the power lines would be expensive. In fact, the court discovered that the divertors, with their recurring costs, would end costing more than installing and maintaining underground lines.

But the court suggested treading the middle path.




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Comparison - Diverter - Flapper/Deflector - Warning Ball

COMPARISON – DIVERTER – FLAPPER/ DEFLECTOR – WARNING BALL 
FEATURE 
Moving 
vs 
 Stationery		 DANGLER OF IndoDivert , DUE TO ITS SWAYING AND
ROTATIONAL MOTION, FOR SURE GETS NOTICED BY
BIRDS.		THERE ARE NO NOTICEABLE ROTATING PARTS, DUE TO WHICH IT
MAY SKIP BIRD’S EYE.		WARNING BALL/ MARKERS ARE ALSO STATIONERY OBJECTS.
REFLECTIVE AREASIZE OF INDODIVERT DISK IS BIG (9”)… TO BE
NOTICED EASILY. OVERALL SIZE OF DIVERTER IS APPROX. 17 INCHES		SIZE OF FLAPPERS IS SMALL. APPROXIMATE 4 INCHES REFLECTIVE AREA OF DISK IS VERY SMALL. ONLY A SMALL PIECE OF REFLECTIVE TAPE IS PASTED IN THE MIDDLEDIAMETER OF BALL IS APPROX. 20
INCHES- ALMOST 3 INCHES LARGER
THAN DIVERTER. WHEREAS WEIGHT
OF DIVERTER IS 1/6TH OF SPHERE MOVING, SWAYING AND SPINNING
DIVERTER DRAWS MORE
ATTRACTION THAN SPHERE
LONGEVITYNO PARTS HIT EACH OTHER. ROTATIONAL MOVEMENT IS ASSISTED WITH BEARINGS FOR LONGEVITY AND PRECISION. DURING SWAYING MOVEMENT, ONLY STAINLESSSTEEL
PARTS COME IN CONTACT WITH EACH OTHER.		Bird Flappers:
FUNCTION OF FLAPPERS IS SIMILAR TO CLAPPING. FLAPPERS HIT EACH OTHER/ SUSPENSION CLAMP WHILE BEING USED, RESULTING IN BREAKAGE, WHICH REDUCES ITS LIFE		TOTAL LOAD IS BORNE BY CLAMPS HOLDING CONDUCTOR AND BALL. THIS CAUSES EXTREME STRESS IN THAT AREA, LEADING TO BREAKAGE.
FEATURE
VISIBILITYDIVERTER HAS LARGE REFLECTORS, WHICH REFLECT SUN & MOON LIGHT.

IT GLOWS IN DARK. GLOW IN DARK FEATURE IS EMBEDDED IN POLYMER DURING MOULDING HENCE WORKS FOR YEARS AND YEARS		VERY SMALL REFLECTIVE AREA. NO ROTATION FEATURE – NO BEARINGS BEARINGS ARE ESSENTIAL TO DISSIPATE WIND ENERGY. RINGS DO NOT ALLOW DISK TO ROTATE, HENCE FULL WIND PRESSURE IS PASSED TO CLAMP & CONDUCTOR, RESULTING IN DAMAGE OF SAME.TO ADD GLOW IN FEATURE, BALL IS
COATED BY NIGHT GLOW COLOURS.

PAINT LIFE IS LIMITED, HENCE
GLOWING FEATURE DIMINISHES
WITH TIME.
WEIGHTWEIGHT OF ONE DIVERTER IS APPROX. 750GMS. IN A SPAN OF 300 METERS , APPROX 28 DIVERTERS

ARE TO BE USED.

OVERALL LOAD ON CONDUCTOR IS MERE 21 Kgs BIRD FLIGHT DIVERTER IS DESIGNED TO DISSIPATE WIND ENERGY. IT STOPS WIND PRESSURE TO PASS ON TO CONDUCTOR/ CLAMP.		SINCE, THE DISKS ARE ATTACHED BY A RING TO THE CLAMP, THEY DO NOT DISSIPATE WIND ENERGY, THUS DESPITE OF BEING LIGHT IN WEIGHT, WIELD MORE LOAD ON CONDUCTOR. IN CASE OF DIVERTER, DISK ROTATES, SWAYS AND DANGLES TO DISSIPATE WIND ENERGY. HENCE NO LOAD IS TRANSFERRED TO CONDUCTORWEIGHT OF ONE SPHERE IS APPROX.
5KGS.

IN A SIMILAR SPAN, LOAD ON
CONDUCTOR IS 100KGS
CONSTRUCTION
MATERIAL
METAL		ALL METAL PARTS USED IN IndoDivert ARE CORROSION FREE. VERY HIGH TENSION TITANIUM/ SS-304 SPRINGS ARE USED, FOR STRONG & UNIFORM GRIPGALVANIZED BOLTS USED TO COUPLE BOTH PARTS OF SPHERE
FEATURE
CONSTRUCTION
MATERIAL
POLYMERS		POLYMERIC PARTS USED IN IndoDivert

CLAMP OF IndoDivert IS MANUFACTURED USING ENGINEERING PLASTIC WHICH CAN WITH STAND CONDUCTOR TEMPERATURE UP TO 90 oC DISK IS MANUFACTURED USING MATERIAL WHICH IS UV STABILIZED AND SELF LUMINESCENT AND GLOWS DURING DARK.		SMALL WARNING DISK IS USED FOR TWO REASONS:

1. FOR WITHSTANDING WIND PRESSURE ABOVE 100KM/HR, EXTRA STRONG CLAMPS IS REQUIRED, WHICH THEY DO NOT HAVE.

2. HENCE SMALL DISK IS USED. LESS SURFACE AREA = LESS PRESSURE ON CLAMP		MADE USING ABS OR FIBRE

NOT SELF LUMINESCENT

FLUORESCENT PAINT COATING, WHICH HAS LIMITED LIFE
EFFECT OF WIND &
STRESS ON CABLES		SINCE IndoDivert IS DESIGNED TO MOVE, IT IMMEDIATELY DISSIPATES THE PRESSURE
CAUSED BY WIND, THUS STRESS ON CONDUCTOR IS NEGLIGIBLE		LIMITED / NO ROTATING DISK DOES NOT ALLOW WIND PRESSURE TO DISSIPATE.

HENCE CAUSES LOAD ON CONDUCTOR		BECAUSE OF BULKY SHAPE AND STATIONERY DESIGN, CAUSES EXCESSIVE LOAD AND STRESS ON CONDUCTOR
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Bird Flight Diverter - A Blessing for Migrating Birds; Especially Endangered Species.

Large birds, like flamingos, Geese, Swans and many other endangered species, while migrating, are at greatest risk of colliding with transmission lines.

Most of these accidents are fatal.

Low light conditions during dawn and dusk limit visibility of transmission lies.


Even during day time, the silver colour of conductor merges with horizon diminishing visibility.


Flying speed of these birds can reach up to 135 km/hour. Due to their size and speed, these birds cannot manoeuverfast to avoid collision.


It is estimated that on average 33 million birds are killed due to transmission line collision every year.


  • Migrating birds usually travel in flocks.

  • Tail end birds are most vulnerable.

  • The ones at the front obstruct the view of birds at the tail end.

  • Tail end birds, who usually follow birds in their front , do not get a chance to change their path at the last moment and collide with transmission lines.

  • These accidents are mostly fatel as birds lose consciousness and fall to the ground from a great height.


IndoDivert - Bird Flight Diverter reveals the presence of a conductor from a great distance which helps the birds change their flight path, thus averting accidents.


Robust construction of IndoDivert makes it strong to withstand all weather conditions.


It is made of material’s which transmit ultraviolet light and glow in the dark. This improves its visibility and gives warning from great distance.


Light reflectors are also fixed in the middle of the dangler which unveil the existence of transmission lines.


In many countries, it is now mandatory to fix Diverters on power transmission/high mast antennas etc.


To buy premium quality bird diverters at an affordable price, contact +91 8 50 60 70 80 8.

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Bird Flight Diverters A Miracle For Avian Species

Multiple Exploration around the globe well elaborates avian mortalities caused by human-made infrastructures, in the race to provide better and upgraded amenities. These facilities are further divided into three different segments which are increasing day by day:-


  • Transmission Lines

  • Communication Tower

  • Wind Turbines


Acquiring the actual probability of avian population mortality is not an easy task with a frequent increase in the above-mentioned facilities. The level of threats to avians species from the said facilities continues to increase.


Transmission Lines always act as one of the biggest trouble/factors for avian species collisions as compared to other facilities. Powerlines have phase-to-phase and phase-to-ground wire clearances, which leads to avian landing / resting on the Powerline towers and further leads to increased risk of completing the circuit often resulting in electrocution and power failure.


Transmission lines where overhead ground wires are mostly smaller in comparison of the phase conductors are more expected to create bird collisions. Eliminating fixed wires and protecting energized conductors with surge arresters should be taken into consideration wherever possible. The discussed factors are pretty much expensive and even not feasible at all locations. Hence industry leaders came up with an alternative economical solution to reduce avian collisions at powerlines by introducing wire marking devices such as:-






  • Aerial Marker Spheres

  • Spiral Vibration Dampers

  • Conductor Cover-Up

  • Swinging Plates

  • Bird-Flight Diverters

  • Flappers.


Few marking devices that physically enlarge the wire work as a wind sensitive device, inspiring snow during winters automatically increases the risk of wire and power break down due to line tension and stress loads. These devices may also cause physical damage to the conductors.

The output of Bird Diverters was always found up to the mark when it comes to either avian collision or population factors. Different Bird diverters have different specifications and probabilities and hence they cannot be compared among themselves. The efficacy of a few bird diverters that are specifically targeting particular species can hardly be questioned. Bird Diverters execution is well explained if these diverters are easily noticeable and act as a predator to endangered and vulnerable species.


Researchers further state that wherever Bird diverters are installed there should be a min spacing of 5 meters or 16ft between each of them because the probability of collision automatically decreases when the space between bird flight diverters is less.


The brief of worldwide studies well elaborates that Bird Flight Diverters are the most potential rescuer in saving avian species.


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Bird Diverters Installation Is A Must On Power Lines- As Per NGT

The myth about the Great Indian Bustard (GIB), Powerlines and Bird Diverters is always a very sensitive point of discussion from decades. Multiple seminars, meetings and conferences were held around the globe from time to time by different wild life-saving associations, federations and other prominent governing bodies. Recently it was on 04-04-2019 ref "Original Application No. 385/2019" when Hon'ble National Green Tribunal -NGT has directed The Ministry of Environment, Forest and Climate Change - MoEF&CC to furnish a accurate report on the deaths of Great Indian Bustard within 2 months. The said report (FACTUAL REPORT ON THE GREAT INDIAN BUSTARD RECOVERY PROGRAM) was finally submitted to The Registrar of  Hon'ble National Green Tribunal -NGT  on 11-07-2019 by Deputy Inspector General MoEF&CC. After going through the facts and figures as elaborated in the above mentioned  factual report, The National Green Tribunal -NGT found that steps taken are not adequate and there continues to be high mortality of the birds.


Hence later this year on 23-12-2020{(Original Application No. 385/2019) -(IA No. 333/2020)}  The National Green Tribunal - NGT passed an order during which it has been directed that the installation of “bird diverters” on power transmission lines should be done on priority basis in order to protect the critically endangered Great Indian Bustard (GIB).

 

The Crucial Points of The National Green Tribunal -NGT Order (mitigation measures for

protection of Great Indian Bustard (GIB) are:-

 

  • Bird Diverters Installation on power transmission lines is Mandatory.


  • Under-grounding of transmission lines needs to be insured for all new projects by making it mandatory under the Water/Air Acts by the concerned State PCBs which may be overseen by the CPCB and the MoEF&CC.”

  • Route planning

  • Vane tips of the wind turbine shall be painted with orange colour to avoid bird hits

 

 

The National Green Tribunal -NGT has strictly directed the MoEF&CC/CPCB/State PCBs to take further action as per the plan suggested by the six-member committee appointed by the Tribunal itself.


In the final verdict, The Court inclined the matter by directing that all mandatory steps be taken for preserving critically endangered Great Indian Bustard (GIB) by installing bird diverters on all existing power transmission lines as suggested by the six-member Committee of the MoEF&CC. It has further directed that  Monitoring of compliance be done, preferably by the Wildlife Institute of India at least twice a year.


The Court has considered the report submitted by the Committee and directed it to finalize the proposed action plan within two months.

There has been a drastic  decline by 75% in the population of the Great Indian Bustard (GIB) since the last 3 decades. The main reason for these declines is lethal accidents /collisions with power transmission lines.
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