... , avoid the sun’s ultraviolet rays burning. Double ratio and triple ratio both can be control in the second terminal.2 ... Size (mm)JLSZ1-10,6,3 Three Phase Three Lines Dry-type Metering Box(Bucket type)JLSZ2-10,6,3 Three ... Phase Three Lines Dry-type Metering Box(Bucket type) JLSZ, JLSZWS Dry High Voltage Metering Box