The LEM131 series electricity energy meter is DIN rail three phase electronic active & reactive integration energy meters. LEM131 series electricity energy meter adopts many advanced technologies of research and development, like microelectronic-techniques, specialized large-scale IC (integrated circuit), digital sampling and processing technology, SMT technique, and so on. LEM131 series electricity energy meter technical performances completely conform to International Standards IEC 62053-21 for Class 1 three phase active energy meter and International Standards IEC 62053-23 for Class 2 three phase reactive energy meter. LEM131 series electricity energy meter can accurately measure the load active energy and reactive energy in three phase four wire AC networks of rated frequency 50Hz or 60Hz. The LEM131 series electricity energy meter has multiple configurations for option, to be suitable with the various market demands. LEM131 series electricity energy meter has features with excellent long-term reliability, small volume, light weight, perfect appearance, easy installation, etc.

√ LEM131 series electricity energy meter; Available as 35mm DIN standard rail mounted, conforming to Standards DIN EN 50022, as well as front PANEL mounted (the center distance between two mounting holes is 63mm). Two mounted methods above are optional for user.
√ LEM131 series electricity energy meter; 10 pole width (modulus 12.5mm), complying with Standards JB/T7121-1993.
√ LEM131 series electricity energy meter; Can select the inside far infrared data communication port and RS485 data communication port. The communication protocol complies with Standards DL/T645-1997. The other communication protocol can also be option.
√ LEM131 series electricity energy meter; S-connection (inlet wire from bottom and outlet wire on top) has two types: direct connection and CT connection for option. For CT connection, there are 27 kinds CT rates to set, after setting CT rate, we can read the meter directly, no need multiplying the CT rate.
√ LEM131 series electricity energy meter; The direct connection meter is 6+1 digits (999999.1) LCD.
√ LEM131 series electricity energy meter; The CT connection meter is 7 digits LCD display: 5+2 digits (only at CT rate is 5:5A) or 7 integers, depended on the setting CT rate.
√ LEM131 series electricity energy meter; Can select the maintenance free lithium battery inside for LCD display to read the meter while the power is cut.
√ LEM131 series electricity energy meter; Equipped with 2 polarity passive impulse output terminals: active energy and reactive energy. The output impulse rate has 4 types: 0.01，0.1，1，10 kWh or kvarh/Pulse, which the user can set to any needed type, conforming to Standards IEC 62053-31 and DIN 43864.
√ LEM131 series electricity energy meter; LEDs indicate separately the power state on each phase, energy impulse signal and data communication state.
√ LEM131 series electricity energy meter; Automatic detection for the load current flow direction and will be indicated by LED.
√ LEM131 series electricity energy meter; Measure the energy consumption in one direction on three phase, which is not related with the load current flow direction at all, complying with Standards IEC 62053-21 and IEC 62053-23.
√ LEM131 series electricity energy meter; The short terminal cover is made from the transparent PC, to reduce the installation space and is convenient for centralized installation.

Wiring diagram -1 (Type S)
(Inlet wire from bottom, outlet wire on top)	Terminals	Note
	L1	L1 Phase line
	L2	L2 Phase line
	L3	L3 Phase line
	N	Neutral line
	7and 8	Passive active energy impulse output port
	3 and 4	Passive reactive energy impulse output port
	1 and 2	SO impulse rate setting port

Wiring diagram -2 (Type S)
(Inlet wire from bottom, outlet wire on top)	Terminals	Note
	L1	L1 Phase line
	L2	L2 Phase line
	L3	L3 Phase line
	N	No use
	7and 8	Passive active energy impulse output port
	3 and 4	Passive reactive energy impulse output port
	1 and 2	SO impulse rate setting port

Wiring diagram -3 (Type S)
(Inlet wire from bottom, outlet wire on top)	Terminals	Note
	L1	L1 Phase line
	L2	L2 Phase line
	L3	L3 Phase line
	N	Neutral line
	7and 8	Passive active energy impulse output
	5 and 6	RS485 data communication port
	3 and 4	Passive reactive energy impulse output port
	1 and 2	SO impulse rate setting port

Wiring diagram -4 (Type S)
(Inlet wire from bottom, outlet wire on top)	Terminals	Note
	L1	L1 Phase line
	L2	L2 Phase line
	L3	L3 Phase line
	N	No use
	7and 8	Passive active energy impulse output
	5 and 6	RS485 data communication port
	3 and 4	Passive reactive energy impulse output port
	1 and 2	SO impulse rate setting port

Wiring diagram -5 (Type S)
	Terminals	Note
	L1	CT on Phase L1
	L2	CT on Phase L2
	L3	CT on Phase L3
	(Inlet wire from bottom, outlet wire on top)
	7and 8	Passive active energy impulse output port
	3 and 4	Passive reactive energy impulse output port
	9	L1 Phase line
	11	L2 Phase line
	13	L3 Phase line
	N	Neutral line
	1 and 2	CT rate and SO impulse rate setting

Wiring diagram -6 (Type S)
	Terminals	Note
	L1	CT on Phase L1
	L2	CT on Phase L2
	L3	CT on Phase L3
	(Inlet wire from bottom, outlet wire on top)
	7and 8	Passive active energy impulse output
	3 and 4	Passive reactive energy impulse output port
	9	L1 Phase line
	11	L2 Phase line
	13	L3 Phase line
	N	Neutral line
	5 and 6	RS485 data communication port
	1 and 2	CT rate and SO impulse rate setting

Wiring diagram -7 (Type S)
	Terminals	Note
	L1	CT on Phase L1
	L2	No use
	L3	CT on Phase L3
	(Inlet wire from bottom, outlet wire on top)
	7 and 8	Passive active energy impulse output
	3 and 4	Passive reactive energy impulse output port
	9	L1 Phase line
	11	L2 Phase line
	13	L3 Phase line
	N	No use
	5 and 6	RS485 data communication port
	1 and 2	CT rate and SO impulse rate setting