Main Switchboard (MSB) · Power Distribution
ABB UniGear ZS1 medium-voltage switchgear for marine main bus distribution. Air- or vacuum-insulated, withdrawable VD4 vacuum circuit breakers. Voltage 6.6-12 kV, current up to 4000 A. Used on cruise ships, large LNG carriers, FPSOs and DP3 drillships. Internal-arc classified IAC AFLR 50 kA / 1 s.
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