My Understanding of Cancellations:
Trip is cancelled by airlines, no replacement flight from them = can claim
Trip is cancelled by ownself due to sickness, important issues, (eg, hospitalisation, bereavement of a close family members) = can claim
Travel Delays: most of the insurance min travel delays is 6 hrs onwards each capping at SGD <200 per hour (or what they deemed rightful amount), Some have capped at minimum of SGD$1200 claims only.