Salah satu tipe tower transmisi berdasarkan tipe konstruksinya baik saluran udara transmisi listrik tegangan tinggi maupun tegangan ekstra tinggi adalah tower rangka baja. Ada dua jenis tower rangka baja: Tower Piramida dan Tower Delta. Perbedaan konstruksi dari kedua jenis tower rangka baja ini dapat dilihat pada gambar di bawah ini.
A lattice steel tower is a type of transmission tower based on the construction of both high-voltage and extra-high-voltage electricity transmission overhead lines. There are two types of lattice steel towers: Pyramid Tower and Delta Tower. The construction differences between these two types of lattice steel towers are evident in the figure below.
Gambar 1. Tower Rangka Baja : Tipe Piramida (Kiri) dan Tipe Delta (Kanan)
Figure 1. Lattice Steel Tower : Pyramid Type (Left) and Delta Type (Right)
Secara umum bagian – bagian tower rangka baja ialah sebagai berikut:
• Stub Tower,
• Kaki Tower,
• Badan Utama Tower,
• Badan Bagian Atas Tower,
• Lengan Tower,
• Bridge, dan
• Frame ”K”.
In general, the parts of a steel frame tower are as follows:
– Stub Tower,
– Tower Leg,
– Tower Common Body,
– Tower Upper Body,
– Cross Arm,
– Bridge, and
– “K” Frame.
Tower piramida adalah tipe tower rangka baja yang biasa digunakan pada saluran udara tegangan tinggi (SUTT) dan saluran udara tegangan ekstra tinggi (SUTET). Di sisi lain, tower delta biasanya ditemukan pada saluran udara tegangan ekstra tinggi (SUTET), terutama pada saluran transmisi sirkuit tunggal 500 kV. Kedua jenis tower rangka baja ini memiliki sedikit perbedaan dalam komposisinya. Perbedaan-perbedaan pada tower ini dapat dilihat pada gambar di bawah ini.
The pyramid tower is a lattice steel tower commonly used in high-voltage overhead lines (HV OHL) and extra high-voltage overhead lines (EHV OHL). On the other hand, the delta towers are typically found in extra-high voltage overhead lines (EHV OHL), especially at the 500 kV single-circuit transmission lines. Both types of lattice steel towers have slight differences in their composition. These differences in the tower can be seen in the picture below.
Gambar 2. Tower Rangka Baja : Bagian- Bagian Tower Piramida
Figure 2. Lattice Steel Tower: Pyramid Tower Parts
Tower Tipe Piramida.
Berdasarkan perbedaan konstruksi pada gambar di atas. Bagian-bagian tower tipe piramida yaitu :
a. Stub Tower (A),
b. Kaki Tower (B),
c. Badan Utama Tower (C),
d. Lengan Tower (D), dan
e. Tower Bagian Atas (E).
Pyramid-type Tower
Based on the differences in construction shown in the picture above, the parts of the pyramid-type tower are as follows:
a. Tower Stub (A),
b. Tower Leg (B),
c. Common Body (C),
d. Cross Arm (D), and
e. Upper Body (E).
Gambar 3. Tower Rangka Baja : Bagian-Bagian Tower Delta
Figure 3. Lattice Steel Tower: Delta Tower Parts
Tower Tipe Delta
Berdasarkan perbedaan konstruksi pada gambar di atas. Bagian-bagian tower tipe delta yaitu :
a. Stub Tower (A),
b. Kaki Tower (B),
c. Badan Utama Tower (C),
d. Lengan Tower (D),
e. Bridge (F), dan
f. Frame “K” (G).
Delta-type Tower
Based on the differences in construction shown in the picture above, the parts of the delta-type tower are as follows:
a. Tower Stub (A),
b. Tower Leg (B),
c. Common Body (C),
d. Cross Arm (D),
e. Bridge (F). and
f. “K” Frame (G).