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To choose the shunt that is appropriate with the task, don't leave too much allowance, and screw it tight.
-To use one shunt for one phase and every phase should have the same value.
-Ampere setting button of every phase must be at the same position.
-To be careful for the plate of insulation under the ceramic base be broken.
-To screw the line connector's pole tight to avoid the connector's pole hot.
-It should not be installed outdoor where may be exposed to the rain
