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What is the ISO protection class for Windsor Locks CT
5P20 CT give more accuracy than PS class CT. 5P20 cant be used in unit protection. Class PS CT is a protection class ct. It is used for differtial proction,distance (UNIT)proction.
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PPC Codes are the Intellectual property of ISO Services so we can not post them here. The best thing to do is to call your fire department or local government office. ISO (Insurance Services Office) handles the inspection and rating of fire departments but calling your insurer, your local city hall or the fire department is the easiest way to get the information.
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Class PX is the definition in IEC 60044-1 for the quasi-transient CT formerly covered by Class X of BS-3938, commonly used with unit protection schemes. These are Protection CTs used for Earth fault protection. Knee point voltage is an important parameter for these type of CTs. Shaikh
in substation protection To be connected to unit protection relays (i.e. differential, REF, Dist., etc.)
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PPC Codes are the Intellectual property of ISO Services so we can not post them here. The best thing to do is to call your fire department or local government office. ISO (Insurance Services Office) handles the inspection and rating of fire departments but calling your insurer, your local city hall or the fire department is the easiest way to get the information.
PS is a special class of protection transformer used in differential protection schemes. The CT is specified by what is known as the knee point (that is the point at which the CT saturates). Because they are specified using the knee point, two separate CTs will have the same characteristics. These matched CTs won't introduce measurement error during through faults on differential protection schemes.
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You need to required following data Voltage Level, Current, Protection Class, SC Current