Main technical parameters:
No. | Item | Unit | Parameter | ||||||||||
1 | Rated voltage | kV | 40.5 | ||||||||||
2 | Rated frequency | Hz | 50 | ||||||||||
3 | Main bus bar rated current | A | 1250 | 1600 | 2000 | ||||||||
4 | Branch bus bar rated current | A | 630 | 1250 | 1600 | 2000 | |||||||
5 | Rated insulation level | 1min power-frequency withstand voltage | kV | Between phases, over grounding | Primary isolated fracture | ||||||||
95 | 115 | ||||||||||||
Lightning impulse withstand voltage | kV | 185 | 215 | ||||||||||
Auxiliary control loop power-frequency withstand voltage | V | 2000 | |||||||||||
6 | Rated short-circuit breaking current(effective value ) | kA | 25 | 31.5 | |||||||||
7 | Rated moderate makeup current (peak) | kA | 63 | 80 | |||||||||
8 | Rated peak withstand current | kA | 63 | 80 | |||||||||
9 | Rated short-time withstand current | kA | 25 | 31.5 | |||||||||
10 | Auxiliary control loop rated voltage | V | -110 | -220 | ~220 | ||||||||
11 | Protection grade | Enclosure IP4X Compartment, when the door to circuit breaker chamber is open, it is IP2X. |
Technical parameters of 40.5KV vacuum circuit breaker inside the switchgear as below:
No | Item | Unit | Parameter | |||||
1 | Rated voltage | kV | 40.5 | |||||
2 | Rated frequency | Hz | 50 | |||||
3 | Rated insulation level | 1min power-frequency withstand voltage | kV | 95 | ||||
Lightning impulse withstand voltage(peak ) | 185 | |||||||
4 | Rated current | A | 630 | 1250 | 1600 | 2000 | ||
5 | Rated short-time withstand current | kA | 25 | 31.5 | ||||
6 | Rated peak withstand current | kA | 63 | 80 | ||||
7 | Rated short-circuit duration | s | 4 | |||||
8 | Rated short-circuit current | kA | 25 | 31.5 | ||||
9 | Anticipated transient recovery voltage | kV | According to GB1984 | |||||
10 | Rated short-circuit makeup current | kA | 63 | 80 | ||||
11 | Rated single capacitor bank breaking current | A | 630 | |||||
12 | Rated operation sequence | O-0.3S-CO-180S-CO | ||||||
13 | Breaking times of rated short-circuit breaking current | time | 20 | |||||
14 | Break brake time t | ms | 50~85 | |||||
15 | Close brake time t | ms | 40~85 | |||||
16 | Mechanism life | time | 10000 | |||||
17 | Contact distance | mm | 22±2 | |||||
18 | Over journey | mm | 6±2 | |||||
19 | Allowable wear thickness for contact | mm | ≤3 | |||||
20 | Average closing brake speed | m/s | 0.5~0.8 | |||||
21 | Average breaking brake speed | m/s | 1.6~2 | |||||
22 | Contact closing brake tripping time | ms | ≤3 | |||||
23 | Asynchronism of breaking brake for three-phase contact | ms | ≤2 | |||||
24 | Asynchronism of closing brake for three-phase contact | ms | ≤2 | |||||
25 | Each phase loop resistance | μ Ω | ≤55 |
KYN61-40.5KV metal-clad movable AC enclosed switchgear