Monoblock
Shubhada LV Monoblock Bushing are designed for use in liquid filled transformers and unit gets mounted directly on the tank wall. The LV Monoblock Bushing comprises of normally four tin plated copper conductors cast into an epoxy resin mounting plate.As per the customer requirement, Bus Bar length can vary according to number of connections.The units are simple to install and offer end user the ability to easily connect multiple cables.
Ratings
Rated Voltage : 1.1 kV
Rated Power frequency
withstand Voltage : 28kV rms / 1 min
Rated Current : upto 800-1700-2500-2700
Mounting Details
Note : it is important that the tank face to which the LV Monoblock Bushing is being mounted is flat with in 1 mm on both the axis across the length and height of the mounting face.
Tightening Sequence and Torque
Shubhada recommends a tightening torque of 30Nm on the M12 Stud during assembly of the Bushing onto the transformer tank in the sequence as shown.
Air LeakageTest
Each unit manufactured is subjected to an air leakage test for 1 hour at pressure of 3 Bar on the transformer side of the assembly with the other side exposed to
Following Type Tests has been conducted at ERDA. (NABL Lab) as per BS 2562.- Verification of dimensions
- Thermal Stability test
- Oil Leakage Test
- Air Leakage Test
- Over Voltage Test
Oil Leakage Sample Test
The oil used complies with the requirements of BS148 as is heated to 75° C and maintained for 6 hours at a pressure of 1 Bar on the transformer side of the assembly with the other side exposed to atmosphere. This is a Type Test.
Outline Dimension of LV Monoblock Bushing
LV Monoblock Bushing with Current Rating and Bus Bar Size and CTC of the Bus Bar
