1.1 This standard specifies requirements for transistorized ballasts for use in dc supplies, having rated voltages not exceeding 250 V, associated with fluorescent lamps with pre-heated cathodes, operated without a starter switch and complying with IS : 2418 ( Part 2 )-1977〓.
1.2 These ballasts are suitable for use on maintained and intermittently-maintained luminaires for emergency lighting.
1.3 This specification does not apply to transistorized ballasts for railways or for aircraft.
IS 7027-1984 history
1985IS 7027-1984 Specification for transistor ballasts for fluorescent lamps