KS out-of-stp blocking relay

The KS relay is a polyphase compensator distance type relay used with the type KD distance relay to prevent tripping while out-of-step or out-of-synchronism conditions exist on the system. It does not prevent or delay the type KD relay from tripping on phase-to-phase faults within its protective zone that occur during the out-of-step condition.

KST out-of-step tripping relay 0.75-20 ohms

The KST relay is used with another distance relay such as a KD-3 relay or the three-phase unit of a KD-4, KD-10, or a KD-11 to sense an out-of-step condition on a power system and to initiate tripping.

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  • Long production life, ease of application and reliable protection
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