This photo refers to our 220KV 2B1-ZM1 SC tangent transmission tower, it is widely used in our Chinese market. Some of technical features of this tower as follow:
1 climate condition
| Item | Temperature (ºC) | Wind speed (m/s) | Ice thickness (mm) |
| Max. temperature | 40 | 0 | 0 |
| Mini. temperature | -20 | 0 | 0 |
| Ice thickness | -5 | 10 | 10 |
| Basic wind speed | 0 | 23.5 | 0 |
| Installation condition | -10 | 10 | 0 |
| Annual temperature | 15 | 0 | 0 |
| Lightning overvoltage | 15 | 10 | 0 |
| Operation overvoltage | 15 | 15 | 0 |
| Hot-line work | 15 | 10 | 0 |
2 tower design data
| Tower type |
Nominal Height scope (mm) |
Nominal Height (mm) |
Horizontal span (m) |
Vertical Span (m) |
Angle º |
Insulator Type |
Horizontal Span at angel condition |
| 2B1-ZM1 | 18~36 | 30 | 350 | 450 | / | I type Insulator | / |
| 36 | 320 | 450 | / | / | |||
| Conductor type: 2×LGJ -400/35 | OPGW: JLB-150 | ||||||
3 Here is the design strength of Chinese tower steel
| Steel material | Anti-push, bending and press strength (N/mm2) | Anti-shear strength (N/mm2) |
|
| Grade | Thickness or diameter (mm) | ||
| Q235 Steel |
≤16 | 215 | 125 |
| >16~40 | 205 | 120 | |
| >40~60 | 200 | 115 | |
| >60~100 | 190 | 110 | |
| Q345 Steel |
≤16 | 310 | 180 |
| >16~35 | 295 | 170 | |
| >35~50 | 265 | 155 | |
| >50~100 | 250 | 145 | |
| Q420 Steel |
≤16 | 380 | 220 |
| >16~35 | 360 | 210 | |
| >35~50 | 340 | 195 | |
| >50~100 | 325 | 185 | |
| Q460 Steel |
≤16 | 415 | 240 |
| >16~35 | 395 | 230 | |
| >35~50 | 380 | 220 | |
| >50~100 | 360 | 210 | |
4 Here is the design strength of our Chinese tower bolts
| Item | Grade | Anti-push strength (N/mm2) | Anti-shear strength (N/mm2) |
| Fastener for towers |
4.8 | 200 | 170 |
| 5.8 | 240 | 210 | |
| 6.8 | 300 | 240 | |
| 8.8 | 400 | 300 | |
| Anchor  bolts |
Q235 | 160 | / |
| Chinese 35 steel | 190 | / | |
| Chinese 45 steel | 215 | / |
Remark: above technical data only references for our client, we can design every type for our overseas clients.
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MEGATRO is a full service engineering company with a global reputation for delivering excellence and innovation in power transmission, transformation, distribution, and telecommunications systems. Our MEGATRO provide and design this type 220KV 2B1-ZM1 SC tangent transmission tower mainly for our Chinese and overseas client. Since 2004, MEGATRO focus mainly international market and had export many kind of transmission structures to overseas clients. MEGATRO has been manufacturing lattice transmission tower & tapered steel poles for lighting, traffic control, communication and utility applications. MEGATRO pioneered the development of transmission tower, telecom tower, substation, and other steel structure and was also at the forefront in the design of Transmission tower.
Over 10 years of experience and innovation in engineering, designing and building towers has evolved MEGATRO into its current form:
- Full Turn-Key provider including site acquisition, engineering services, manufacturing,  field services-DAS, tech services, value added reseller and monitoring, maintenance and network ownership
- Specialize in developing supplying and building wireless and wired networks and in-building telecommunications systems, as well as energy infrastructure
- Single source from Design to System Integration
- Top quality, ISO 9001 registered
MEGATRO mainly design all kinds of towers and posts for:
- Telecoms
- Power transmission
- TV and Radio Broadcast
- Roads and City Development
- Wind energy solution
- Steel structure and workshop
Our complete selection of towers includes:
- Self-supporting
- Monopoles
- Guyed towers
- Custom-designed radar towers
- Broadcast towers
- Power transmission
MEGATRO also designs and manufactures tower related products including:
- Fall protection
- Antenna brackets
- Other accessories if needed by clients
Today, with over 10 years of experience and our commitment to excellence, MEGATRO remains an industry leader in the manufacture and design of steel tubular & angular & monopole structures for all Highway, Municipal, Custom, telecom, lighting and electric Utility applications. MEGATRO has a complete staff of professional engineering personnel trained in the PLS Pole program and three different manufacturing processes for producing steel towers, poles and other supports. We utilize the latest versions of PLS-CADD, PLS-POLE, TOWER, AutoCAD and other CAD software.
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The structure shall be designed according to load combinations given as per IEC 61936-1 and as illustrated below:
Normal loads
1 Dead weight load
2 Tension load
3 Erection load
4 wind load
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Exceptional loads
1 Switching forces
2 short-circuit forces
3 Loss of conductor tension
4 Earthquake forces
Moreover, MEGATRO is fully equipped and qualified to carry out Design Engineering services which includes:
√ Overhead Transmission line steel tower & Telecom steel tower
  Basic Design and Analysis
√ Shop Erection Drawings
√ As-Built Drawings
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MEGATRO performs in-house design activities specializing in electrical overhead transmission &telecom tower steel works, which include wind and earthquake loading, static analysis, stress analysis by finite element methods and fatigue. Our Engineering Department is boasting of highly qualified engineering who are conversant with international codes and standards. The work is carried out with extensive use of CAE/CAD via a large of computer network. The computer hardware & drafting software are liked to the CNC workshop equipment for downloading of information thereby eliminating error and saving valuable production time.
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Besides, MEGATRO is one of the few manufactures who assemble a face of 220KV 2B1-ZM1 SC tangent transmission tower This attention to quality may not be the cheapest process but it does insure every tower meets our high standards of quality. And it helps to reduce on-site construction cost due to mismatched assemblies. After fabrication all 220KV 2B1-ZM1 SC tangent transmission towers are delivered to the galvanizing facility to be Hot DIP Galvanized. Towers are processed through the f
Instruction Manual
1. Features
Clock display, 10 sets of adjustable timed power control, randomized power control, manual switch and optional DST setup.
2. First time charging
This timer contains a rechargeable battery. It is normal that the new/old model runs out of battery if it wasn`t being charged for a long period of time. In this case, the screen will not turn on.
To charge : simply plug the timer to a power outlet. The charging time should take at least 15 minutes.
If the screen doesn`t light up or displays garbled characters, simply reboot the system by pressing the [RESET" button.
3. Set clock
Hold [CLOCK" button and [WEEK" button to adjust week.
Hold [CLOCK" button and [HOUR" button to adjust hour.
Hold [CLOCK" button and [MINUTE" button to adjust minute.
Hold [CLOCK" button and [TIMER" button to select 12 hour/24 hour display.
Hold [CLOCK" button and [ON/AUTO/OFF" button to enable/disable DST (daylight-saving-time).
4. Set timer
Press [TIMER" button, select and set timer. Setting rotation : 1on, 1off, 2on, 2off, ...... , 10on, 10off.
Press [HOUR" button to set hour for timer.
Press [MIN" button to set minute for timer.
Press [WEEK" button to set weekday for timer. Multiple weekdays can be selected. ex: if selected [MO", the timer will only apply on every Monday; if selected [ MO, WE, FR", the timer will apply on every Monday, Wednesday and Friday.
Press [RES/RCL" button to cancel the selected on or off timer. The screen will show "-- -- : -- --" , the timer is canceled.
Press [RES/RCL" button again to reactivate the timer.
When timers are set, press [CLOCK" to quit timer setting and return to clock.
5. Random function
Press [RANDOM" button to activate random function, press again to cancel function.
System only runs random function when [AUTO" is on.
Random function will automatically start the timer from 2 to 32 minutes after the setting.
ex : if timer 1on was set to 19:30 with the random function on, the timer will activate randomly between 19:33 to 20:03.
if timer 1off was set to 23:00 with the random function on, the timer will activate randomly between 23:02 to 23:32.
To avoid overlapping, make sure to leave a minimum of 31 minutes gap between different sets of timer.
6. Manual control
Displayed features:
ON : socket turns on.
OFF : socket turns off.
AUTO : socket turns on/off automatically via timer.
Manual ON setting
Press [ON/AUTO/OFF" button to switch from [AUTO" to [ON".
This mode allows socket of the device to power up. Power indicator will light up.
Manual OFF setting
Press [ON/AUTO/OFF" button to switch from [AUTO" to [OFF".
This mode turns socket of the device off. Power indicators will turn off.
7. Electrical parameters
Operating voltage : 230VAC
Battery : NiMh 1.2V
Power consumption : < 0.9W
Response time : 1 minute
Power output : 230VAC/16A/3680W
Q&A
Q: Why won`t my timer turn on?
A: It`s out of battery, you can charge the timer by plugging onto any power outlet. Charge the device for at least 15 minutes. Then press [RESET " button to reset the device.
Q: Can I set seconds of the timer?
A: No, the smallest time unit is minute.
Q: Does my timer keeps old settings without being plugged onto a power outlet?
A: Yes, the timer has an internal battery, it allows the timer to save settings without a power outlet.
Q: Is the battery rechargeable?
A: Yes, the battery is rechargeable. We recommend to charge it for 4 hours so the battery is fully charged.
Q: Does the timer needs internet connection?
A: The timer does not need internet.
Q: Does the screen have back light function?
A: It doesn`t support back light.
Digital Timer Socket, Timing Switch Socket, Electronic Timer Socket, Timer Socket
NINGBO COWELL ELECTRONICS & TECHNOLOGY CO., LTD , https://www.cowellsockets.com