R17 missile or SS1 Scud B (Nato Naming), is operated by B 90 brigade. This missile is result from Uni Soviet tactical misile development program. R 17 fuel is liquid rocket fuel that made from several compound.
A great progress has been made by the defense industry vietnam. After a long research through the end, the Institute managed to create a defense technology vietnam agent compound O. O compound agent is part of the liquid fuel rocket R17. With this success means that the life of rocket R 17 vietname be held longer.
image src: http://quocphong.baodatviet.vn
R17 missile or SS1 Scud B (Nato Naming), is operated by B 90 brigade. This missile is result from Uni Soviet tactical misile development program. R 17 fuel is liquid rocket fuel that made from several compound.
R17 missile or SS1 Scud B (Nato Naming), is operated by B 90 brigade. This missile is result from Uni Soviet tactical misile development program. R 17 fuel is liquid rocket fuel that made from several compound.
Diesel Generator Protection Practice
Dear all hands
Diesel generator, because its flexibility and its generation capacity wide range , from few Kva until to million va, diesel generator set is become major choice for standby power system. In my company, four medium diesel generator set with total capacity at 1 MVA is used asstandby power system. All of our diesel machine in diesel generator set is made by deutz.
Ussually in one diesel generator set we can find that diesel machine itself , generator and the power transformer come from different manufacturer. But even come from different manufacturer the generator protection scheme is still same.
Diesel generator Protection practice scheme
Diesel generator protection practice scheme usually divide in three different class based on generation capacity. These diesel generator protection class are :
1.Diesel generator protection practice scheme for small diesel generator set.
2. Diesel generator protection practice scheme for medium diesel generator set.
3. Diesel generator protection practice scheme for large diesel generator set .
Diesel generator protection scheme for small diesel generator set.
For small diesel generator, protection scheme is very simple, These generator protection include:
1. Diferential relay
2. Over current relay
Image below protection scheme for small diesel generator.
Diesel generator, because its flexibility and its generation capacity wide range , from few Kva until to million va, diesel generator set is become major choice for standby power system. In my company, four medium diesel generator set with total capacity at 1 MVA is used asstandby power system. All of our diesel machine in diesel generator set is made by deutz.
Ussually in one diesel generator set we can find that diesel machine itself , generator and the power transformer come from different manufacturer. But even come from different manufacturer the generator protection scheme is still same.
Diesel generator Protection practice scheme
Diesel generator protection practice scheme usually divide in three different class based on generation capacity. These diesel generator protection class are :
1.Diesel generator protection practice scheme for small diesel generator set.
2. Diesel generator protection practice scheme for medium diesel generator set.
3. Diesel generator protection practice scheme for large diesel generator set .
Diesel generator protection scheme for small diesel generator set.
For small diesel generator, protection scheme is very simple, These generator protection include:
1. Diferential relay
2. Over current relay
Image below protection scheme for small diesel generator.
How TO MAKE our lead acid battery last long live .
Dear all hands
Lead acid batere may the most common electric power source that we use in daily live. May fo powering starting system of an car or even to power whole of a car just like in electrical vehicle. Lead acid batere still the common batere we use in car. I think because lead acid batere its price and its capacity . But sometime we didnt know how t maintenance our lead acid batere. We right maintenace and doing in regaularly base, our lead acid batere could has long life service.
Lead acid battery construction
The difference between ordinary lead acic batere and betere that is used in totally ecletric powered vehicles (Such of in golf car).Contructicially both batere has many plate and flooded by electrolit , below general construction of lead acid batere :
Battery car both are lead acid batere and use exactly same chemistry . But they designed in different optimization. Lead aid batere in car is designed to capable witstand large very large curret but in very short time. This situation like when we starting our car.After car macine run,car battery will in condition only being drained at 20 % of of its current capacity. Used inthis way a car batery maybec an last a number of years.
To achive a large amount of current,a car battery uses thin plates to increase its surface.
Deep cycle battery
A deep cycle battery such of in golf car is designed to provide a steady amount of current over a long period of time. A deep cycle battery can provide a surge when needed, but nothing like the surge a car battery can. A deep cycle battery is also designed to be deeply discharged over and over again (something that would ruin a car battery very quickly). To accomplish this, a deep cycle battery uses thicker plates.
Rating of a car battery typically :
There are two rating that commonly used in car betery
1.CCA (Cold Cranking Amps) – The number of amps that the battery can produce at 0 degrees C for 30 seconds
2.RC (Reserve Capacity) – The number of minutes that the battery can deliver 25 amps while keeping its voltage above 10.5 volts
Typically, a deep cycle battery will have two or three times the RC of a car battery, but will deliver one-half or three-quarters the CCAs. In addition, a deep cycle battery can withstand several hundred total discharge/recharge cycles, while a car battery is not designed to be totally discharged.
Basic principle for Maintenance of lead acid batere
Flooded lead-acid batteries can function for 10 years or longer if properly maintained. The six general rules of proper maintenance are
1.Match the charger to the battery requirements.
2.Avoid overdischarging the battery.
3.Maintain the electrolyte at the appropriate level (add water as required).
4.Keep the battery clean.
5.Avoid overheating the battery.
6.Provide an equalizing charge periodically to weak batteries/cells.
Tutorial on setting and configuring mikrotik bridge and router
Dear all hand
After we understand the main difference between router and bridge in computer network (as in this post) , now we ready to learn ho to set and configure mikrotik router and bridge, below is step by step tutorial on how to configure and set mikrotik router and bridge:
How to set mikrotik bridge
1. Select the menu at the Bridge, the Bridge tab, click Settings.
In winbox, By default, if we use the bridge, then the rule in the firewall will have no effect. Switch setting.
Check the Use IP Firewall, then Apply and OK.
2. Creating a Bridge interface.
Still in the Bridge menu, click (add), it would appear New Interface window – General tab, in this section we do not need to change the default settings provided by MikroTik, simply replace the bridge of his name alone. Finish with Apply and OK.
3. Setting Bridge Port.
Select the Ports tab, click the (add), then the window will pop up New Bridge Port. That Needs to be changed only Interface section alone, according to the ether which would be the bridge interface.
4. With two mikrotik router, make the following bridge configuration, so that from Router A can ping the router B.
5. Connect between Ether3 – Router A with Ether3 – Router B using cross UTP cable.
6. Give each IP on the Ether with a single IP segment.
Example: Ether3 – Router A: 192.168.170.2/24
Ether3 – Router B: 192.168.170.3/24
To avoid bridge loops, we use the STP / RSTP feature
7. On the Bridge tab, double click on the Bridge interface, select the tab STP, check the RSTP. Apply and OK.
8. After all finished. Do a ping from one router the other router
Configuring Routing
Here is a static route configuration settings so that all computers can connect to the internet and all computers can ping the other computer.
1. Turn src-nat/masquerade
In winbox, Select the menu IP – Firewall, do disable NAT on the tab at the masquerade with the click of a cross.
2. Add the IP Address on the interface used, the corresponding image above.
3. Add the IP Routes
Each RouterBoard have different tasks in adding an IP Router.
To add an IP router, select the menu IP – Routes.
Fill in the Dst. Gateway IP Address and conformity of data that has been given to each RouterBoard.
Router 1:
• Destination address: 0.0.0.0 / 0 Gateway: 10.10.10.1
• Destination address: 10.10.2.0/24 Gateway: 10.10.1.2
• Destination address: 10.10.3.0/24 Gateway: 10.10.1.2
• Destination address: 192.168.170.0/24 Gateway: 10.10.1.2
• Destination address: 192.168.171.0/24 Gateway: 10.10.1.2
• Destination address: 192.168.172.0/24 Gateway: 10.10.1.2
Router 2:
• Destination address: 0.0.0.0 / 0 Gateway: 10.10.1.1
• Destination address: 10.10.3.0/24 Gateway: 10.10.2.2
• Destination address: 192.168.171.0/24 Gateway: 10.10.2.2
• Destination address: 192.168.172.0/24 Gateway: 10.10.2.2
Router 3:
• Destination address: 0.0.0.0 / 0 Gateway: 10.10.2.1
• Destination address: 192.168.172.0/24 Gateway: 10.10.3.2
Router 4:
• Destination address: 0.0.0.0 / 0 Gateway: 10.10.3.1
If all configuration is completed. Try pinging from your computer to your friend’s computer.
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