tender for module modification [module rating 90 kw, 110 kw, 132 kw, 150 kw] by retrofitting of air circuit breaker at 2x600 mw, sstpp, dongalia. , air circuit breaker( rating 800a/1000a) required for retrofitting in existing module (rating 90kw, 110kw,132kw & 150kw ) of unit 1 & 2 specification given in annexure-i of tender schedule for retrofitting of draw out acb in existing module. technical specification of major items should be isi standard. , motor protection numerical relay (specification given in annexure-i) , retrofitting charges of air circuit breaker in existing module including retrofit kit. (as detailed scope of work given in tender schedule)