Information about your personal safety
Due to different conditions or requirements, this manual cannot cover all the safety matters related to the operation of this instrument, but it is very important to understand the following items to ensure your personal safety and prevent damage to the instrument. These items are highlighted with a triangular safety symbol, depending on the degree of potential hazard indicated.

Working Humidity	≤ 75%
Storage Humidity	≤ 95%
Operating Temperature	-10°C - +50°C
Storage Temperature	-30°C - +70°C
International standardIEC	62053-21
Domestic Standard	GB/T17215.321-2008
Accuracy Class	1
Dustproof and Waterproof	IP 51
Protective Insulation Encapsulation Type	Ⅱ

Model	(LCDDisplay)
Reference Voltage (Un)	220V    230V    240V
Operating Voltage	181/279V AC (3~)
Rated Current (Ib)	2.5   5A  10A  15A  20A   30A
Maximum Current (Imax)	10A  20A  40A  60A  80A   100A
Starting Current	≤0.004b（Direct Access）
Withstand Overload Current	30Imax    0.01s
Working Frequency	50Hz±10%
Internal Power Consumption	≤2W / 10VA
Pulse Constant	1000imp
RS485 Port	23(A)and24(B)
Data Storage Time	>20 Years