SRMJL-1 series phase amplitude leakage protection relayDetailed product description：

The SRMJL-1 series phase amplitude leakage protection relay is combined with AC contactors or circuit breakers to form a leakage protection device, which is suitable for low-voltage (380/220V) distribution systems with a neutral point directly grounded. Its main function is to provide indirect contact protection against fatal electric shock and improve the safe operation capability of the power grid. Due to the adoption of the new technology of phase and amplitude discrimination, insensitive phases and dead zones during electric shock are eliminated, and leakage and electric shock can be automatically distinguished. It also has various functions such as energy saving and noise reduction, making it particularly suitable for use in rural power grids with poor line conditions and three-phase imbalance.

characteristic
1. Distinguish phase and amplitude, with no action dead zone. In the case of unbalanced three-phase leakage, the sensitivity of each phase's electric shock action is consistent.
2. Automatically distinguish between leakage and electric shock, and can be put into operation in situations where the insulation level of the line is low and the leakage current is high.
3. Strong anti-interference ability, no misoperation under interference conditions such as lightning, power grid harmonics, and instantaneous overcurrent of the line.
4. When the leakage of the circuit suddenly decreases, it does not operate and has a high commissioning rate.
5. It has a power test function when turned on, and can automatically reclose within 20-30 seconds after tripping, which is safe and labor-saving.
6. Energy saving silent operation, the working voltage of the matched contactor coil can be used at 380V or 220V, and long-term operation does not burn the coil. The active power saving rate is 85%.
7. Zero sequence transformers are interchangeable and universal.
8. Adjustable leakage current: The leakage current values of 300 and 500mA can be adjusted, which significantly improves the operation rate and safety, and has strong adaptability.
9. Instrument display leakage value: The instrument automatically displays the leakage value of the circuit, making it easy to check the condition of the circuit at a glance.

Main technical parameters

technical parameters	model
	SRMJL-1	SRMJL-1/A	SRMJL-1/B	SRMJL-1/D
rated voltage	380/220V	380/220V	380/220V	380/220V
rated frequency	50Hz	50Hz	50Hz	50Hz
rated current	250A	400A	630A	Below 1000A
Rated leakage action current	300mA/500mA adjustable	300mA/500mA adjustable	500mA	300mA/500mA adjustable (Below 4000)	500mA （630A-1000A）
Rated leakage non operating current	＜150mA/250mA	＜150mA/250mA	250mA	＜150mA/250mA	250mA
Rated sudden change leakage action value	75mA	75mA	75mA	75mA
Rated sudden change leakage non action value	38mA	38mA	38mA	38mA
Rated breaking time	＜0.2s	＜0.2s	＜0.2s	＜0.2s
Sudden decrease in leakage and no action value	＜150mA/250mA	＜150mA/250mA	250mA	＜150mA/250mA
Delay reclosing	20-30s	20-30s	20-30s	20-30s
Classification of Action Characteristics	AC type	AC type	AC type	AC type
Rated fuse capacity	5A	5A	5A	5A
Rated short-time withstand current	3000A	3000A	3000A	3000A
Energy saving effect	Active power saving rate>85% Reactive power saving rate>5%	-	-	-

Specifications and external dimensions

model	type	Matching contactor and rated current range	Dimensions (mm)	number of packages
SRMJL-1	Standard energy-saving type (small ring diameter 45mm)	CJ type (ordinary type) is suitable for 63A-250A (relay required for 40A and below)	205×110×72	6 pieces
SRMJL-1/A	No energy-saving type (middle ring diameter 45mm)	CJ type is suitable for 400A and below	205×110×72	6 pieces
SRMJL-1/B	No energy-saving type (large ring diameter 85mm)	CJ type is suitable for 630A and below	205×110×72	4 pieces
SRMJL-1/D	Various rings	Suitable for SRM and DW type circuit breakers Suitable for 1000A and below	205×110×72