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Question
How should you choose between the Over-Current Relay K2CA-DO and K2CA-DO3?
Answer
Select the model according to the Breaker's trip method.
K2CA-DO-[]: Current transformer secondary current tripping
K2CA-DO3-[]: Voltage, no-voltage, DC tripping
Note: The box "[] " in the model number is for the case code. The following three types are available.
D2: Square embedded pull-out type
F4: Compact square embedded type
R2: Compact round embedded type
The appearance of each type is shown below.
Other Measuring / Motor Protective Relays FAQ
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Does an OTG Zero-phase Current Transformer have polarity?
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Is a specific insertion direction required, and do the input terminals have polarity for the cable of a Zero-phase Current Transformer used with an AGD/K6EL Ground Fault Relay?
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What does instantaneous operation mean for Motor Protective Relays?
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