Tender For operation & preventive maintenance of electrical sub station 33/0.4 kv, 4x2000 kva transformer, 33/0.4 kv sub station, 2x1600 kva transformer, 33/0.4 kv sub station, 1x500 kva transformer, 4 nos. 500 kva d.g. set, 2 nos. 800 kva d.g. set, h.t. panel and l.t. panels installed at service block and advocate chamber, new high court bilaspur (c.g.) (including annexure a, b, c, d & e) (a/r)