The LRW series automatic circuit reclosers can use on overhead distribution lines as well as distribution substation applications for all voltage classes 11kV up to 38kV at 50/60HZ power system.and its rated current can reach 1250A.
The LRW series automatic circuit reclosers integrates the functions of control, protection, measurement, communication, fault detection, on-line monitoring of closing or opening.
It has the following product structure features:
1.The box shell is made of high-quality stainless steel or ordinary steel plate by antirust treatment process and then spraying ultraviolet resistant varnish.
2. The insulation part is made of epoxy resin and silicone rubber composite insulation material, with high insulation grade and strong anti pollution ability. There is no transformer oil and sulfur hexafluoride gas in the tank, meeting the requirements of oil-free transformation and environmental protection.
3. The operating mechanism is a spring operating mechanism, with manual and electric modes. The design of unique buffer device, excellent performance, small rebound, low noise.
4. The vacuum interrupter adopts special stainless steel brazing technology, which is stable and reliable with low air leakage rate. Advanced ceramic metallization technology ensures the air tightness of products
5. The CT is made of high-quality magnetic conducting material and composite insulation of epoxy resin and silicone rubber.
6. According to the user's needs, it can cooperate with the corresponding controller to form auto recloser and sectionalizer, which is the ideal equipment to realize the distribution network automation.
ADVANTAGES
1.Modular design
2.Compact and lightweight,easily installed on poles or in substations.
3.Maintenance free throughout life.
4.Highly resistant to ozone, oxygen, moisture, contamination and ultraviolet light.
5.Adapt to adverse weather conditions and dirty environment.
Rated voltage |
kV |
15 |
27 |
38 |
Rated current |
A |
630-1250 |
||
Rated frequency |
Hz |
50/60 |
||
1min power frequency withstand voltage Dry/Wet |
kV |
50/45 |
65/55 |
85/75 |
Lightning impulse withstand voltage opposite/fracture |
kV |
100 |
125/150 |
170 |
Rated short circuit breaking current |
kA |
20 |
16/25 |
12.5 |
Rated Short Current Switching Current(peak value) |
kA |
50 |
40/63 |
31.5 |
Rated Peak Value Withstand Current |
kA |
50 |
40/63 |
31.5 |
4s Short Time Withstand Current |
kA |
20 |
16/25 |
12.5 |
Operation sequence |
O-0.3s-CO-3s-CO-3s-CO |
|||
Breaking Current Frequency Under Rated Short Circuit |
times |
30 |
||
Mechanical life |
times |
10000 |
||
Secondary Loop 1min Power Frequency Withstand Voltage |
2 |
ENVIRONMENT CONDITION
1. Ambient air temperature: -25°C~+40°C;
2. Altitude: no more than 2000m;
3. The ambient air may be polluted by dust, smoke, corrosive gases, steam or salt fog;
4. The wind speed does not exceed 34m/s;
5. Vibration or ground motion from the switchgear and control equipment is negligible;
6. If beyond the above normal use conditions, pls discuss with the manufacturer.
Detail Functions:
+with Instantaneous over current protection, definite time over current protection and over current protection, over current
three-stage current protection, low voltage component block, composite voltage component block or direction component block is available for each section;
+with zero sequence over current protection, E/F, SEF, with directional model for selection;
+with Manual closed accelerating protection, the breaker will trip fast when it’s closed in fault, and it will trip and lockout
close operation;
+with 0 to 4 shots reclosing, “O-T1-CO-T2-CO-T3-CO-T4-CO-Lockout” , reclosing shots setting, time delay setting, each section OC protection sequence coordination;
+with two fast+ two delay curve coordination setting for phase OC protection and EF/SEF protection, 5 model IEC standard curves+ 5 model ANSI/IEEEC curves;
+with cold load protection;
+with hot-line-tag protection;
+with two stage negative sequence over current protection;
+with frequency protection and frequency slip protection;
+with over-voltage protection ;
+with under-voltage protection ;(optional)
+with residual voltage protection ;
+with frequency protection ;
+with relay for additional transformer protection high temperature input; (optional/definable)
+with relay for additional transformer protection heavy gas input ; (optional/definable)
+Event record, Real-time sync, Real time checking,
+Optional functions:
Optional channel for voltage sensor, Remote operating, Double-PT, protection for CT circuit, intelligent phone control/blue booth, GPRS communication, Mobile-phone message/GSM, SCADA system.
Lawrence Electric Co., Ltd. is a high-tech enterprise focusing on power transmission and distribution products, providing customers with one-stop service of power transmission and distribution products.
It mainly produces and sells lightning arrester, insulator, fuse, isolation / load switch, SF6 / vacuum circuit breaker, power supply fittings, optical cable fittings, switch cabinet and other transmission and distribution products. The company has production bases and sales centers in Jiangxi, Zhejiang, Uganda, Tanzania and other places.
Our products have operated safely in the power supply systems of more than 20 countries and regions around the world for more than 10 years. They are also qualified suppliers of China State Grid and China Southern Power Grid. At present, they have gained a good reputation in the field of power system in the world.
We have received high-quality product recommendation letters from power supply companies in Kenya, Uganda, Tanzania, Zambia, Guinea, Ghana, Togo, Mozambique, Nepal, Guyana, Myanmar and other countries and regions.
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