1.Application
The rated insulation voltage of series residual current operated circuit breaker is 1000V,which is suitable for three-phase four-wire neutral point direct grounding (TT)distribution networks with 50Hz AC,400V rated
voltage and 630A rated current.It is used to provide indirect contact protection;Prevent fire danger caused by grounding fault current due to equipment insulation damage;And it can be used to distribute electric
energy and it can also be used to distribute electric energy and protect lines and power supply equipment from overload,undervoltage,short circuit,single-phase grounding and other faults.
Products meet the following standards:Low-voltage Switchgear and Control Gear-Part 2:Circuit Breaker (IEC60947-2);
2.Main Functions and Features
1.High-performance 32-bit ARM microprocessor is used to carry out signal processing and intelligent control in real time;
2.LCD Chinese/English display provides friendly HMl and simple operation;
3.For residual current (leakage)protection,the residual current gear can be set online,with reclosing function; Monitor and track the residual current of the line in realtime,and automatically adjust the gear to ensure the operation rate and reliability of the product;
4.Long delay,short delay and instantaneous three-stage protection,electronic tripping mode is applied,which s independent of supply voltage;
5.High breaking ability could ensure the reliability of short circuit protection for the line;
6.Overvoltage protection,undervoltage protection,phase loss protection;
7. Real-time display of residual current,three-phase supply voltage and load current of the line;
8.Protection functions and parameters can be set and modified online;
9.Trip types (residual current,locking,overload,undervoltage,overvoltage,phase loss)can be identified & displayed,and can be stored,inquired &deleted;
10.Network type has communication function,which can realize remote communication,telemetry,remote control and remote adjustment.
11.Pluggable lightning protection module (optional)
12.Infrared communication function (optional)
3.Main Technical Parameters
| Specification/Model |
SRM1E-125CY
SRM1E-125CS |
SRM1E-250CY
SRM1E-250CS |
SRM1E-400CY
SRM1E-400CS |
SRM1E-630CY
SRM1E-630CS |
| Shell grade rated current (A) |
125 |
250 |
400 |
630 |
| No.of poles |
3P+N |
3P+N |
3P+N |
3P+N |
| Rated operating voltage Ue:(V) |
AC 400/50HZ |
| Rated insulation voltage Ui (V) |
800 |
1000 |
| Rated impact withstand voltage (V) |
8000 |
| Flashing distance (mm) |
×50 |
≠100 |
| Timit short circuit breaking capacit Icu (kA) |
50 |
65 |
85 |
| Operating short circuit breaking capacity Ics (kA) |
35 |
42 |
65 |
| Rated residual short circuit on (off) capacity I△m (kA) |
12.5 |
16.25 |
21.25 |
| Rated short-time withstand current |
1.5 |
3 |
5 |
8 |
| Residual current operating features |
AC type |
Rated residual operating
current I△n (mA) |
50/100/200/300/400/500/600/800
MCU automatic tracking or manual setting |
100/200/300/400/
500/600/800/1000
MCU automatic tracking ormanual setting |
| Residual operating time features |
Delayed/non-delayed type |
| Limit non-drive time of delayed type (s) |
0.06:2I△n |
| Breaking time (s) |
I△n≤0.5;21△n≤0.2;51△n≤0.15 |
| Auto re-closing time (s) |
20-60 |
| Operational performance (times) |
Powered |
1500 |
1000 |
1000 |
| Not powered |
8500 |
7000 |
4000 |
| Total |
10000 |
8000 |
5000 |
| Overload and short circuit features |
Three-stage protection,electronically adjustable,see "Description of Protection features"for details |
| Overvoltage protection value (V) |
Setting value (250~300)±5% |
| Undervoltage protection value (V) |
Setting value (145~200)±5% |
| Link control delay time (ms) |
≤40ms |
| Communication delay time (ms) |
≤200ms |
4.Description of Protection features
4.1Overload long delay protection
Sheet1:Overload Long Delay Parameters Setting operating value setting range
| Parameters |
Shell current |
Set value |
Factory setting value |
operating setting
value Ir1 |
125 |
50A,63A,80A,
100A,125A |
125A |
| 250 |
100A,125A,140A,160A,
180A,200A,225A,250A |
250A |
| 400 |
160A,180A,200A,225A,250A, 315A,350A,400A |
400A |
| 630 |
250A,315A,350A,400A,
500A,630A |
630A |
| Delay time setting value tL |
3s,4s,6s,8s,10s
12s,16s,18s,OFF |
12s |
operating features sheet2:Protection operating features
| Ambient temperature |
Current name |
Setting current multiple |
Agreed time |
| +40ºC |
Agreed non-release current |
1.05Ir1 |
≥2h |
| Agreed release current |
1.3Ir1 |
<2h |
Delay features
Overload protection is carried out according to inverse time features:
T=(611)2tL Delay accuracy:10%,where T is the operating time value,Irl is the long delay protection setting value,listhe fault current,and tL is the long delay time setting value.
4.2 Short-circuit short-time delay protection
Short-circuit short-delay protection prevents impedance short-circuit of distribution system.The purpose of trip delay is to realize selective protection.
Setting of related parameters of short-circuit short-delay protection
Sheet 3:Short Circuit Short-Delay Parameter Setting
| Parameters setting |
Set value |
Factory setting value |
| Setting value of short-de- lay operating current Ir2 |
2Ir1,2.5Ir1,3Ir1,4Ir1,5Ir1
6Ir1,7Ir1,8Ir1,10Ir1,12Ir1 |
6Ir1 |
Setting value of
short-delay time ts |
0.1s,0.2s,0.3s,0.4s,0.6s,
0.8s,1.0s,OFF |
0.4s |
operating features of short-circuit short-delay protection
Sheet 4:Short-circuit Short-Delay operating features
| features |
Fault current multiple |
Release features |
Delay error |
| Non-operating features |
≤0.85 Ir2 |
Non-operating |
/ |
| Activate features |
>1.15 Ir2 |
Delay operating |
±40ms |
4.3 Instantaneous protection
Setting of related parameters of instantaneous protection
Sheet 5:Instantaneous Parameters Setting
| Parameters setting |
Set value |
Factory setting value |
| Instantaneous operating current setting value Ir3 |
4 Ir1,6 Ir1,7 Ir1,8 Ir1,9 Ir1,10 Ir1,
11 Ir1,12 Ir1,13 Ir1,14 Ir1,OFF |
10 Ir1 |
operating features of short-circuit instantaneous protection
Sheet 6:Instantaneous operating Features
| features |
Current multiple(l/lr3) |
Release features |
Release time |
| Non-operating features |
≤0.85 |
Non-operating |
≥200ms |
| Activate features |
>1.15 |
operating |
<200ms |
4.4Residual current protection features
Gear setting range
| Parameters |
Setting value (125,250,400 |
Setting value (630,800) |
Factory setting value |
Residual operating
current I△n |
50,100,200,300,400,500, 600,800 automatic |
100,200,300,400,500,60 0,800,1000 automatic |
500 |
operating features
Sheet 7:Protection operating features
| Parameters |
Parameters |
| Rated non-operating current Rated active current |
0.5I△n |
| ≥0.75 l△n |
| Delay features |
21△n limit undriven time(△t) |
Segment time |
| l△n |
21△n |
5l△n |
| Non-delay |
|
≤0.3s |
≤0.15s |
≤0.04s |
| 0.06 |
≥0.06s |
≤0.5s |
≤0.2s |
≤0.15s |
Automatic gear mode
Each gear value and floating value in automatic gear mode:
| Gear value (mA) |
Floating value (mA) |
| 50 |
25 |
| 100 |
50 |
| 200 |
100 |
| 300 |
150 |
| 400 |
200 |
| 500 |
250 |
| 600 |
300 |
| 800 |
400 |
| 1000 |
|
When the residual current is greater than the floating value of the gear but does not reach its operating value and stably maintains for 60s,the gear goes up a gear,and so on,until reaching the maximum gear;When the residual current is less than the floating value of the next gear in this gear and stably maintains for 120s,the gear goes down a gear,and so on,until reaching the minimum gear.Take "Gear 2"and the initial residual current of 100mA of the line as an example.The circuit breaker is powered on,and the gear is automatically set to 300mA.When the residual current increases to more than 150mA and stabilizes for 60s,the gear changes to gear 500mA;When the residual current decreases below 150mA and stabilizes for 120s,the gear changes to gear 200mA.
4.5 Automatic reclosing
When the residual current exceeds the operating current value,the gear can automatically reclose after 20~ 60s,but the manual closing is not limited by time.If the fault current is eliminated within 5s after closing,the closing is successful and the circuit breaker runs normally;If the fault current is not eliminated,the circuit breaker trips again and is locked,so it cannot be reclosed automatically,but must be closed manually.
4.6 Overvoltage protection function
When the line phase voltage is higher than the set value of overvoltage protection,the circuit breaker protection trips.When the line voltage returns to normal,the circuit breaker can be automatically closed for operation.The setting value range of overvoltage protection is 231V~330V,and the factory setting is 275V. Users can set or close the protection.
4.7 Undervoltage protection function
When the line phase voltage is lower than the set value of undervoltage protection,the circuit breaker protection trips.When the line voltage returns to normal,the circuit breaker can be automatically closed for operation.
The setting value range of undervoltage protection is 88V~209V,and the factory setting is 145V.Users can set or close the protection.
4.8 Phase loss protection function
When the power supply terminal of the line is of phase loss,the circuit breaker protection trips.
When the line voltage returns to normal,the circuit breaker can be automatically closed for operation.
Detailed Photos
compangy profile
Longroad Electric Co.ltd founded in 2010,is located in the largest manufacturing base of low-voltage electric equipment of Liushi China.which is called"the Electric Device Metropolis of China"Longroad Electric specialized in the industrial electrical appliance,high-low voltage electrical equipment integrated with R&D,Manufacturing.International trade and service
Longroad Electric Co,ltd regards quality of products as lifeLongroad Electric Coltd has been granted ISO9001 management system certifications.The comprehensive product line has more than 1000 models which have been approved by TUVCE,CQC. SGS.ROHS.SASO.the products sells well to UKSpain.PortuaalSingaporeTurkevRussiaKorea.South Africa.. more than 70 countries and regions
Longroad Electric Co.ltd is always striving hard to provide the best services and competitve pricing to all customers.
Corporate Culture
Enterprise policy:market oriented;technology driven; quality for survival;brand for developmentBusiness philosophy: provide value for customers: seek development for emplovees:take responsibilitv for societyTalent view the sea embraces all rivers and makes Jiaolong soar; the thousand boats compete to make the best of the worldQuality policy:people-oriented, pragmatic and
innovative: pursuina auality and servina the marketEnterprise spint:harmonymodesty.praamatism and developmentCustome
service: think for customers;be responsible for customers;make customers satisfiedEnterprise goal: to build an electrical manufacturing enterprise
service ldea
"Intearity first.quality first"is the basic tenet of our companyOur quality policy is:installation specifications.timely maintenance. Abide by the contract.serve sincerelv and meet the needs of customers.We know that product auality is the basic and key factor of enterprise competitiveness, and service is the extension of product quality and one of the important factors of enterprise competition We are determined to treat our customers with"integrity":
1.All aspects of sincere service.That is.from the customer's electricity use report.enaineerina desian. euipment procurement installation and construction.eauipment commissionina and acceptancecompletion and power receivina to the test and detection during the future operation.We all provide all-round,whole process sincere service,try our best to meet the needs of customers.2,High quality returns.We strictly follow the provisions and requirements of the contract terms and engineering design on the equipment, and provide qualified products that meet the requirements,so as to complete the engineering construction and installation tasks within the specified time limit with the installation technology level
3,Active and stable aftercare service.We provide 24-hour emergency service after the project is powered on, that is, in case of abnormal operation of eauipment or accident power failure.as long as the customer calls us.we will rush to the site immediatelv remove the fault and resume power transmission
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