South Central Railway

South Central Railway has published Supply Of insulation monitoring relay suitable for lhb type ac coach switch board cabinet (s1a07), for installation at s1a7, sl. no. 68 in bom, conforming to rdso specification no. rdso/pe/spec/ac/0184-2015 (rev.1) and bom letter no. el/7.1.108/mssbc dated 17.09.2021.technical requirements:system voltage: 415v acsystem type: 3 phase, neutral isolatedvoltage measuring range: 0-500v acinsulation measuring range: 10 k ohm to 150 k ohmcontrol voltage: 24-240v ac/dcacceptable makes/models as per bom:abb - cat. no. cm.iws.2s, schneider - vigil ohm/imd-im10, siemens - cat. no. 3ug4581-1aw31, dold - cat. no. il5880.12, contrel - cat. no. ir 470ly-21a / ri-r138, woka or bender onlyonly the above makes/models conforming to the specified rdso specification and bom are acceptable.. Last date of submission for this tender is 2026-06-10. This is a Switch Supply tender in Secunderabad, Telangana