WORK

Providing and fixing of 220 kV isolator mechanism boxes of different makes at 220 kV Substation, Sec 62, Noida. The mechanism box shall be of size 450 × 350 × 300 mm, fabricated from 14 SWG MS sheet, and shall include the following features: 1. One front door and one side door with proper locking arrangement. 2. Bottom-mounted arrangement with 02 Nos. MS channels for supporting and mounting the box. 3. A top-mounted circular plate (165 mm diameter) having 12 Nos. holes of 20 mm diameter, matching with the horizontal operating pipe plate. 4. The top plate shall be connected with 42 mm pipe rod and shaft, along with suitable bush/bearing arrangement inside the box. 5. Provision of straight hypoid bevel gear and meter gear assembly, complete with removable handle for operation of isolator blades. 6. Fixing and mounting of auxiliary contacts (06 NO + 06 NC). 7. Installation of 16 Nos. terminal blocks (20–32 Amp) mounted on an internal channel, with internal wiring using 2.5 sq. mm copper cable. 8. Bottom side provision of a 150 × 150 mm gland plate with 12 Nos. cable glands. The box shall be duly painted with: 1. One coat of primer, and 2. Two coats of epoxy enamel paint (smoky grey shade), as per specifications. Scope of Work also includes: 1. Dismantling of old and damaged operating mechanism boxes. 2. Shifting of dismantled material from site to store. 3. Installation, alignment, and commissioning of new mechanism boxes. 4. Complete disconnecting and reconnecting of electrical wiring and box earthing work required for installation. After installation, the operation of isolators shall be smooth, reliable, and mechanically sound in all respects.

Providing and fixing of 132 kV isolator mechanism boxes of different makes at 220 kV Substation, Sec 62, Noida. The mechanism box shall be of size 500 × 400 × 330 mm, fabricated from 18 SWG MS sheet, and shall include the following features: 1. One front door and one side door with proper locking arrangement. 2. Bottom-mounted arrangement with 02 Nos. MS channels for supporting and mounting the box. 3. A top-mounted circular plate (165 mm diameter) having 10 Nos. holes of 16 mm diameter, matching with the horizontal operating pipe plate. 4. The top plate shall be connected with 33/28 mm pipe rod and shaft, along with suitable bush/bearing arrangement inside the box. 5. Provision of straight hypoid bevel gear and meter gear assembly, complete with removable handle for operation of isolator blades. 6. Fixing and mounting of auxiliary contacts (06 NO + 06 NC). 7. Installation of 16 Nos. terminal blocks (20–32 Amp) mounted on an internal channel, with internal wiring using 2.5 sq. mm copper cable. 8. Bottom side provision of a 150 × 150 mm gland plate with 12 Nos. cable glands. The box shall be duly painted with: 1. One coat of primer, and 2. Two coats of epoxy enamel paint (smoky grey shade), as per specifications. Scope of Work also includes: 1. Dismantling of old and damaged operating mechanism boxes. 2. Shifting of dismantled material from site to store. 3. Installation, alignment, and commissioning of new mechanism boxes. 4. Complete disconnecting and reconnecting of electrical wiring and box earthing work required for installation. After installation, the operation of isolators shall be smooth, reliable, and mechanically sound in all respects.

Providing and fixing of 33 kV isolator mechanism boxes of different makes at site, in place of damaged and defective isolator boxes. The mechanism box shall be of size 250 × 250 × 150 mm, fabricated from 18 SWG MS sheet, and shall include the following features: 1. Provision of 3 NO + 3 NC contact switches. 2. Fixing of 01 No. bush for vertical operating rod. 3. Bottom-mounted gland plate of size 150 × 150 mm with 04 Nos. cable glands. The box shall be duly painted with: 1. One coat of primer, and 2. Two coats of epoxy enamel paint (smoky grey shade), as per specifications. Scope of Work also includes: 1. Dismantling of old/damaged isolator boxes. 2.Proper installation and fixing of new boxes. 3. Complete earthing and reconnection works as required. After installation, the isolator operation shall be smooth and mechanically sound in all respects.