Megatro 400kv Low Profile Strain Straight Line Tower

• Usage: Crossing Tower, Tension Tower, Angle Tower, Terminal Tower, Transposition Tower, Branching Tower, According to Client Requirements
• Conductor Circuit: Single Circuit
• Certification: ISO, GS
• Materials: Steel
• Standard: Nonstandard
• Style: Independence Tower
• Model NO.: MGP-400kv
• Structure: According to Client Requirements
• Design Software: Pls
• Accessories 1: Power Fitting
• Accessories 2: Conductor and Cable
• Accessories 3: Earth Wire and Opgw
• Accessories 4: Tower Foundation and Design
• Accessories 5: Tower Earthing Kits and Lightning Rod
• Accessories 6: Aviation Light
• Accessories 7: Insulator
• Accessories 8: Anchor Bolts and Templates
• Accessories 9: Opgw and Cable
• Transport Package: Export Standard Package
• Specification: As per client requirements
• Trademark: MEGATRO
• Origin: Shandong, China
• HS Code: 73082000
• Production Capacity: 40000 Tons/Year

Product Description

MEGATRO 400kv low profile strain straight line tower
Anchor pylons may also have a switch attached to their crossbeam. These so-called switch pylons are operated from the ground by the use of long rods. The attachment of circuit breakers to pylons is only practical when voltages are less than 50 kV.
Sequences
This straight line is made of strain towers to achieve low profile of the pylons and high clearance of the wires.
Sequences of two or more strainer pylons are uncommon in a powerline because strainers require twice as many strain insulators as ordinary pylons. Longer wire sections thus reduce installation work and cost. Sequences of strainers are sometimes used at powerlines crossing valleys, or where the powerline runs a path with curves.

This photo refers to our 400kv low profile strain straight line 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	-5	27	0
Installation condition	-10	10	0
Annual temperature	15	0	0
Lightning overvoltage	15	10	0
Operation overvoltage	15	16	0

2 Technical specification of conductor and OPGW

Item		Conductor	OPGW
		JL/G1A-500/35	JLB20A-170
construction	AL	45×3.76
	Steel(Al wrap steel )	7×2.51	19×3.4
Cross-section (mm^2)	Al	500.00	43.13
	Steel	34.60	129.37
	Total	535.00	172.5
Diameter		30.11	17.01
Length mass (kg/km)		1650.2	1152.0
Elastic module (MPa)		63000	147200
coefficient of linear expansion (1/ºC)		20.9×10^-6	13.0×10^-6
Rated broken (N)		119410	203380

3 tower design data

Tower type	Nominal Height Scope (mm)	Horizontal span (m)	Vertical Span (m)	Angle º	Nominal height tower weight Kg
8A1-JC1	550	550	800	0~20	93551

4 type and force of conductor and OPGW

Power voltage	1000KV	Conductor type	8×JL/ GIA-500/35	Max. operation Tension force (KN/phase)	363.006	Un-balance Stress value(%)	30
		OPGW Type	JLB20A-170	Max. operation Tension force (KN/pc)	56.827	Un-balance Stress value(%)	40

5 Operation data

Item	Horizontal span (m)	Vertical Span (m)	Representative Span (m)	Angle º	Height (m)	KV
data	5550	600/300	300/650	0~20	48	/

6 loading data

Site condition				Normal operation condition			Accident condition		Installation condition	Non-uniform Ice condition
				Basic wind speed	Ice	Mini. temperature	Non- broken	broken
Climate condition (t/v/b)				-5/27/0	-5/10/10	-15/0/0	-5/0/10	-5/0/10	-5/0/10	-5/0/10
Horizontal loading		conductor		70526	19800	0	0	0	9075	19800
		Insulator Power fitting		7439	777	0	0	0	648	777
		Jump & string		13848	3132	0	0	0	1530	3132
		OPGW		6408	2652	0	0	0	696	2652
Vertical loading		conductor		102949	173932	102949	173932	173932	102949	156186
		Insulator Power fitting		76666	90161	76666	90161	90161	76666	86787
		Jump & string		34011	45288	34011	45288	45288	34011	42424
		OPGW		10958	22513	10958	22513	22513	10958	19624
Climate condition (t/v/b)				-5/27/0	-5/10/10	-15/0/0	-5/0/10	-5/0/10	-5/10/0	-5/10/10
Stress  force	conductor		One side	312592	360816	255000	360816	360816	306123	360816
			The other side	302496	360816	223336	360816	108245	221376	252571
			Stress differences	10096	0	31664	0	252571	84747	108245
	OPGW		One side	54649	61629	50125	61629	61629	53962	61629
			The other side	52148	55938	47105	55938	0	45833	36977
			Stress differences	2501	5691	3020	5691	61629	8129	24652

7 Foundation distance size

Nominal Height (m)	Foundation distance (mm)		Anchor bolt
	Front distance	Side distance	Type and quantity	Distance /radius (mm)	Material
36	14700	14700	8×M56	800	Chinese type 35 steel
39	15480	15480		800
42	16260	16260		800
45	17040	17040		800

8 Foundation force

Nominal Height (m)	Tx	Ty	T	Nx	Ny	N
36	362	397	2285	454	548	3215
39	361	393	2307	461	549	3266
42	360	390	2327	463	546	3305
45	358	386	2336	468	546	3354

9 Here is the design strength of Chinese tower steel

Steel material		Anti-push, bending and press strength (N/mm^2)	Anti-shear strength (N/mm^2)
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

10 Here is the design strength of our Chinese tower bolts

Item	Grade	Anti-push strength (N/mm^2)	Anti-shear strength (N/mm^2)
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.

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 400kv low profile strain straight line 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.

400kv low profile strain straight line tower

Over 10 years of experience and innovation in engineering, designing and building towers has evolved MEGATRO into its current form:

1. Full Turn-Key provider including site acquisition, engineering services, manufacturing,   field services-DAS, tech services, value added reseller and monitoring, maintenance and network ownership
2. Specialize in developing supplying and building wireless and wired networks and in-building telecommunications systems, as well as energy infrastructure
3. Single source from Design to System Integration
4. Top quality, ISO 9001 registered

A complete selection of towers including self-support, lattice steel tower, monopoles and guyed towers, form custom-designed radar towers to broadcast towers and energy infrastructure. MEGATRO carries a variety of related products including fall protection, transmission lines, antennas, obstruction lights, and accessories, and other products if client need, MEGATRO also tailored product as per client condition.
MEGATRO mainly design all kinds of towers and posts for:

1. Telecoms
2. Power transmission
3. TV and Radio Broadcast
4. Roads and City Development
5. Wind energy solution
6. Steel structure and workshop

Our complete selection of towers includes:

1. Self-supporting
2. Monopoles
3. Guyed towers
4. Custom-designed radar towers
5. Broadcast towers
6. Power transmission

MEGATRO also designs and manufactures tower related products including:

1. Fall protection
2. Antenna brackets
3. 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.

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
 
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

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.


Except otherwise specified elsewhere in the specification, the surface treatment and corrosion protection for all metal parts shall be in conformity with the latest revision of the standards listed below:
ASTM A 123 zinc (hot-dipped galvanized) coating on iron and steel products
DIN 55928 Protective painting of steel structure instructions
DIN 55945 Painting materials-Notions
DIN 18363 Paint work-Buildings
DIN 18364 Surface protection work for steel
DIN 53210 Determination of rust degree
DIN 55151 Determination of adhesion
ISO4628/3 Determination of rust penetration

MEGATRO' 400kv low profile strain straight line tower systems can accommodate a variety of cross-arm. MEGATRO also offers a wide variety of accessories and mounts.   
 
Other information:
Availability size: Based on the customer's requirements.
Material: Chinese material or as per clients requirement
Steel grades
Tower loading legs: Chinese steel Q420B, which equivalent to ASTM A572 GR60
Other webs, bracing and not stress plate and angle steel: Chinese Q235B, which equivalent to ASTM A36
Plates: Chinese steel Q345B, which equivalent to ASTM A572 GR50
Bolts: Bolt quality shall be Chinese Class 6.8 and 8.8, as per our Chinese standard, or ISO 898 standard or ASTM A394 type 0,1,2,3 requirements
The anti-theft bolts shall be Huckbolt Fasteners or approved equivalent.  The fasteners shall be manufactured from high tensile steel A242 or equivalent and hot-dip galvanized in accordance with ASTM specification A153 and A394.
 
Fabrication standard: Chinese Standard or other standard which client accepted
A) Dimension and tolerance for angle are according to GB/T1591-1994, similar to EN 10056-1/2
B) Hot dip galvanization in accordance with GB/T 13912-2002, which similar to ASTM A 123
C) The welding will be performance in accordance with AWS D1.1 or CWB standard
D) All fastener galvanization conform to ASTM A153 requirements.

Package: Both parties discuss before delivery
Port of Loading: Qingdao Port
Lead Time: One month or based on the customer's needs (For time being our capacity about 5000 tons one month, and can meet client requirements)
Minimum order: 1 set