Eberry Fzw28 (VSP5) 12kv Load Break Switch Vacuum Load Switch Circuit Breaker Fzw28 -12 Factory
China Eberry Fzw28 (VSP5) 12kv Load Break Switch Vacuum Load Switch Circuit Breaker Fzw28-12 Factory, Find details about China Load Break Switch, 12kv from Eberry Fzw28 (VSP5) 12kv Load Break Switch Vacuum Load Switch Circuit Breaker Fzw28-12 Factory
Outdoor high voltage vacuum circuit breaker (circuit breaker) is suitable for indoor switchgear of 12kv power system. As a protection and control unit for power grid equipment and industrial and mining enterprise power design, it is suitable for switching various loads of different nature, frequent operations, and multiple interruption of short-circuit current.
Features:
1.Auto-locking phase-to-phase short-circuit fault: When the same short-circuit fault occurs on the user's branch line, the demarcation switch is opened and locked immediately after the substation breaker or recloser protection trips. After the substation recloses, other branch users on the feeder quickly recover power supply
2.Quickly locate the fault point: After the user branch line accident causes the demarcation switch protection action, the responsible user will cut off the power, and it will report the accident information on its own initiative. The power company dispatches personnel to check the cause of the accident through the handheld computer or communication module on the spot
3.The single-phase ground fault is automatically cut off: When a single-phase earth fault occurs on the user's branch line, the demarcation switch is automatically opened. The substation and other branch users on the feeder do not feel the fault
4.This switch can achieve the following functions: quick-break protection, over-current protection, three reclosing, event logging surge protection, zero sequence protection, real-time clock, post-acceleration acceleration, real-time status query, smart handheld.
NO | Item | Units | Technical parameters | ||
1 | Rated voltage | KV | 12 | ||
2 | Rated short-duration power frequency withstand voltage |
| 42/48(Interphase, ground/fracture) | ||
3 | Rated lightning impulse withstand voltage |
| 42/48(Interphase, ground/fracture) | ||
4 | Rated frequency | Hz | 50 | ||
5 | Rated current | A | 630 1250 | 630 1250 1600 2000 2500 3150 | 630 1250 1600 2000 2500 3150 |
6 | Rated short-circuit breaking current | KA | 20/25 | 31.5 | 40 |
7 | Rated short-time withstand voltage |
| 20/25 | 31.5 | 40 |
8 | Rated short circuit duration | S | 4 | ||
9 | Rated peak withstand current | KA | 50/63 | 80 | 100 |
10 | Rated short circuit closing current |
| 50/63 | 80 | 100 |
11 | Secondary circuit power frequency withstand voltage (1min) |
| 2000 | ||
12 | Rated single / back to back capacitor group breaking current | A | 630/400(40kA:800/400) | ||
13 | Rated capacitor bank closing current |
| 12.5 (frequency is not greater than) | ||
14 | Mechanical life | KA | 20000 | ||
15 | Rated current breaking times (electrical life) |
| 20000 | ||
16 | Rated short circuit current breaking times | times | 50(40KA≤30) | ||
17 | Dynamic and static contacts allow wear cumulative thickness | mm | 3 | ||
18 | Energy storage time | s | ≤10 | ||
19 | Contact opening distance | mm | 11±1 | ||
20 | Overtravel |
| 3.5±0.5 | ||
21 | Contact closing bounce time | ms | ≤2(40KA≤3) | ||
22 | Three-phase split/closed period |
| ≤2 | ||
23 | Average opening speed (contacts are separated by -8mm) | m/s | 1.2±0.2 | ||
24 | Main conductive loop resistance |
| 0.6±0.2 | ||
25 | Main conductive loop resistance | μΩ | ≤50(630A)≤45(1250A) ≤40 (1600,2000A)≤35 (2500A or more) | ||
26 | Rated operation sequence |
| 0-0.3s-Co-180s-Co | ||
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