Supply Of 'Qn1', Q-Series Dc Neutral Line Relay, Non- Ac Immune, Plug In Type, Working Over 50 V Dc And Having 8F/8B Metal To Carbon Contact With Plug Board, Retaining Clips And Connectors Conform Ing To Brs- 930A And Specification No. Irs:S-34 Or Latest & S-23 (As Applicable) Or Latest. The Interlocking C Ode For This Unit Shall Be "Abcef". [ Warranty Period: 30 Months After The Date Of Delivery ] ]