Complaint
Type LW24- /T outdoor H.V. A.C. dead tank SF6 gas circuit breaker is a new kind of circuit breaker with self-blast interrupter and spring
operating mechanism,on the basis of technology of product imported from Mitsubishi, Japan.The latest achieve-arc extinguishing principle of
gas-blast pressure adapting with breaking-current is employed,by which most of energy required for breaking rated short-circuit current are
acquired from arc itself.Therefore, the demand for operating power is reduced significantly. The three pole interrupters are placed inside
three metal enclosures respectively. The circuit breaker can be mechanically three-phase gang-operated. Both remote electrical control and
local manual control can be realized. Type CT20-II spring operating mechanism, provided with the product, is a kind of mechanism with low
operating power, minimum maintenance work needed and high reliability. The product reaches international advanced level in the respect of
main technical performance.
LW24-72.5 product passed back-to-back capacitor bank switching test and shunt reactor switching test at High-Power Laboratory of KEMA,
and obtained successfully test certificates of KEMA in November 2004.
2.1.Altitude:≤3000m
2.2.Humidity monthly:≤90%
2.3.Max .wind velocity:≤35m/s
2.4.Pollution class:IV class
2.5.Ambient air temperature:-35ºC~40ºC(It's satisfied under condition of -40ºC in heavy cold area)
2.6.Max .temperature difference daily: 25K
2.7.Earthquake withstand density:9 degree
2.8.Ice coating: ≤10mm
2.9.Max. radiance from sun: 1000 W/m2
Note: When product is used under the condition out of above range, user and manufacturer shall consult to confirm.
| No. | Name | Unit | Parameters | Parameters | |
| 1 | Product Type | / | LW24-72.5 | LW24-72.5 | |
| 2 | Number of breaks | set | 1 | 1 | |
| 3 | Rated voltage | kV | 72.5 | 72.5 | |
| 4 | Rated frequency | Hz | 50 | 50 | |
| 5 | Rated current | A | 4000 | 2500 | |
| 6 | Main circuit resistance | μΩ | <=150 | <=150 | |
| 7 | Temperature rise test current | A | 1.1Ir | 1.1Ir | |
| 8 | 1minRated power frequency 1min withstand voltage | Across open breaks | kV | 160+42 | 160+42 |
| To earth | kV | 160 | 160 | ||
| 9 | Rated lightning impulse withstand voltage (1.2/50μs) | Across open breaks | kV | 350+59 | 350+59 |
| To earth | kV | 350 | 350 | ||
| 10 | Rated short circuit breaking current | AC component effective value | kA | 31.5 | 31.5 |
| Time constant | ms | 45 | 45 | ||
| Breaking times | Times | >=12 | >=12 | ||
| Prime Minister's breaking coefficient | / | 1.5 | 1.5 | ||
| 1. | Pre sale service |
| a. | make technical solution |
| b. | send quotation, technical data sheet and drawing |
| c. | prepare power transmission plan, testing plan and shipment plan |
| 2. | In sale service |
| a. | supervise the manufacturing schedule totally in accordance with the plan |
| b. | send photos to customer during every manufacturing process(hold point) |
| c. | inform the customer one week before testing. |
| 3. | After sale service |
| a. | installation and commissioning, training the workers |
| b. | quick response within 12 hours any time |
| c. | provide 12 months guarantee period normally. |
| 1. Q: | What is your delivery time ? |
| A: | Depend on the type of transformer. |
| 2. Q: | What is your payment term? |
| A: | 30% advance by T/T , 70% before delivery by T/T or L/C or we can discuss about it. |
| 3. Q: | What kind of standard you follow? |
| A: | IEC, ANSI, CSA, GB, etc |
| 4. Q: | What kind of supporting documentation you can provide normally |
| A: | Quotation, outline drawing, manufacturing plan, quality control plan testing plan, financial report, type test report(KEMA, CESI),reference list, etc |
| 5. Q: | What is your normal warranty period? |
| A: | 12 months after transformer operation. |
| 6. Q: | Can u do installation and commission in user's site? |
| A: | Yes, we can send our installation team to user's country for service. |
| 7. Q: | Do you have any experience in this kind of transformer? |
| A: | Yes, we can provide reference list for check. |
