Optimistic Engineering

🌞 Optimistic Engineering at Canton Fair, China 🇨🇳
সোলার প্যানেল ও নবায়নযোগ্য জ্বালানি খাতে সর্বাধুনিক প্রযুক্তি ও নির্ভরযোগ্য সোর্সিং নিশ্চিত করতে আমাদের প্রতিনিধি এখন বিশ্বের অন্যতম বৃহৎ বাণিজ্য মেলা Canton Fair, China-এ উপস্থিত আছেন 🇨🇳,

🔍 আমরা প্রতিশ্রুতিবদ্ধ — উন্নতমানের, টেকসই ও কার্যকর solar solutions বাংলাদেশের জন্য নিয়ে আসতে।

Our CCTV & Surveillance systems provide peace of mind for you, your business property, staff, and clients.
With over many years of experience in CCTV & Surveillance installation system services, you can rely on us to provide you with clear, jargon-free guidance. From internal CCTV systems to multi-camera night vision CCTV and video management solutions, we supply and install all types of CCTV systems to monitor office space, business premises, grounds, buildings, and traffic.
Our team have all the latest knowledge to advise you on everything from enterprise business parks to office spaces.

-detection -way_audio_communication features

Lightning protection technologies
1. Lightning protection system with early streamer emission air terminal (ESEAT)
The early streamer emission (ESE) concept --During a storm, when the propagation field conditions are favourable, the OPR first generates an upward leader. This leader from the OPR tip propagates towards the downward leader from the cloud at an average speed of 1 m/µs. The triggering time ∆T (µs) is defined as the mean gain at the sparkover instant (continuous propagation of the upward leader) obtained with an ESE air terminal compared with a single rod air terminal exposed to the same conditions. ∆T is measured in the high-voltage laboratory, all tests are defined in appendix C of the French standard NF C 17-102. The triggering time instance gain ∆T is associated with a triggering time distance gain ∆L. ∆L = v. ∆T, where: – ∆L (m): gain in lead distance or sparkover distance – v (m/µs): average speed of the downward tracer (1 m/µs). – ∆T (µs): gain in sparkover time of the upward leader measured in laboratory conditions. OPR air terminals are especially effective for the protection of classified industrial sites, administrative or public buildings, historical monuments and open-air sites such as sports grounds.

Major components-
1. early streamer Emission Air Terminal (ESEAT)/ Collection Volume Method (CVM) as per IEEE 998-2012 or equivalent product
2. Air Terminal mast (Length : 2300 mm Dia : 30mm)
3. Lightning event counter
4. Earth test box
5. Copper made down conductor having dia 12.7 mm or copper strip (30mmx2mm) with fixing holder on vertical and horizontal surface.
5. GI Pole: Dia 3'', Length: 15' (L-10', D-3''; L-5', D- 2'' )
6. Earthing ( 2 nos.) for the lightning arrester
i) Soil digging : Size – 3000mmx400mmx400mm (2 nos.)
ii) Size of the pit : (600mmx600mmx600mm) (2 nos.)
iii) Copper plate : (300mmx150mmx15mm) (2 nos.)
iv) Copper electrode (12.7mm dia copper rod or copper strip (30mmx2mm)
v)nLength of the copper rod or strip : minimum 3000mm
(10+10) = 20 meter.
vi) Ground enhancing materials (40 + 40) = 80 kg.

*Lightning protection system with meshed cages
A meshed cage installation is made up of:
– devices to capture the atmospheric discharges consisting of strike points
– roof conductors
– down conductors
– protection measures against injuries to leaving being due to touch and step voltages (e.g. warning notice)
– an equipotential bonding between each earth and the general earthing circuit of the structure; this one must be disconnectable.