ETM2L PV On-Grid Circuit Breaker – Molded Case Type

Scope of Application

The ETM2L Series PV On-Grid Low-Voltage Circuit Breaker (hereinafter referred to as the CircuitBreaker) is a low-voltage circuit breaker specifically designed for distributed PV power grid connection.Integrating an electric actuator, an intelligent controller, and a molded case circuit breaker, it’ sintended to protect circuits or electrical equipment from overcurrent, short circuit, open phase,undervoltage, voltage loss and more.The Circuit Breaker can achieve undervoltage delayed tripping and avoid voltage fluctuations andsudden drops in power systems, ensuring that the PV power supply does not immediately leave thegrid when there are voltage fluctuations, and maximizing the support role of distributed PV powersupply on the grid. At the same time, it can also enable users to achieve the maximum economic benefits.

The Circuit Breaker is included with an electric actuator, which can achieve automatic closing onvoltage detected, effectively improving the automation performance of distributed PV distributionsystems. The Circuit Breaker is equipped with an RS485 serial interface, which can meet therequirements of communication networking.

Standard

GB 14048.2: Low-voltage switchgear and controlgear Part 2 Circuit-breakersQ/GDW 1972-2013: Technical specifications for low-voltage circuit-breakers for distributedgrid-connected PV stations

GB/T22710: Electronic controllers for low-voltage circuit breakers

GB/T 2423.1: Environmental testing for electric and electronic products Part 2: Testmethod – Tests A: Cold

GB/T 2423.2: Environmental testing for electric and electronic products – Part 2: Testmethod Tests B: Dry heat

Dimensions(mm)

Model	Overall Dimensions			Installing Dimensions
	L	W	T	W×L	ΦD
125AF	220	122	138	60×200	Φ4.5
250AF	240	142	137	70×202	Φ4.5
400AF	337	198	186	96×274	Φ8
630AF	337	198	186	96×274	Φ8
800AF	370	280	190	140×333	Φ8

Technical Parameters

Item/Parameter Level/Spec	ETM2L-125M/3N	ETM2L-250M/3N	ETM2L-400M/3N	ETM2L-630M/3N	ETM2L-800M/3N
Frame Current (A)	125	250	400	630	800
Number of Poles	3P+N
Rated Working Voltage Ue (V)	AC400 / 50HZ
Rated Insulation Voltage Ui (V)	AC800
Rated Impulse Withstand Voltage Uimp	8kW
Flashover Distance (mm)	50	50	100	100	100
Limit Short Circuit Breaking Capacity Icu (kA)	50	50	75	75	65
Operating Short Circuit Breaking Capacity Ics (kA)	35	35	50	50	42
Use Category	B	A	B	B	B
Rated Short Time Withstand Current Icw (kA / 1s)	5/1S	5/1S	10/1S	10/1S	10/1S
Automatic Closing Time (s)	25~30
Overvoltage Protection Value (V) ※	253-300V, with delay adjustable
Undervoltage Protection Value (V) ※	154-187, with a delay of 0-10 seconds, adjustable at one gear per second
Total Number of Operations	10000	8000	5000
Trip on Power Outage ※	A delay of 0-10 seconds, adjustable at one gear per second
Restore Voltage ※	185-276V
Overload Protection	●	●	●	●	●
Short Circuit Protection	●	●	●	●	●
Residual Current Protection	●	●	●	●	●
Close on Voltage Detected	●	●	●	●	●
Open Phase Protection	●	●	●	●	●
Overvoltage/Undervoltage Protection	●	●	●	●	●

 Overall Dimension Diagram (mm)