SF6 Circuit Breaker
Rated voltage: 40.5KV
Rated current: 2000A
Model: HVD8 40.5KV 2000A
Brand: JUCRO
HVD8 /LW8-40.5 type outdoor high-pressure sulfur hexafluoride circuit breaker is three-pole ac 50 hz, outdoor high voltage switch equipment, applicable to 40.5 kV power transmission and distribution system control and proteCTion, can also be used to contact circuit breaker and movable capacitor group.
Standard: IEC 62271-100.
Certification: ISO9001-2015
Operation: Energy-storage Type
Installation: Fixed
Arc-extinguishing Medium: SF6
Speed: Normal Type Circuit Breaker
HS Code: 85353000
a. The circuit breaker is outdoor small ceramic column structure, which equipped with CT14 spring operation mechanism; mechanism and main part connected with simple installation. It has features of convenient adjustment, reliable operation, suitable for frequent operation; mechanism service life more than 3000 times;
b. AdoPT air-compression arc-extinguishing structure, with strong breaking capacity, 40kA total breaking times up to 12, which is the highest in China:
c. Reliable sealing performance. Adopt import seal; dynamic seal adopts "V" type sealing ring with spring pressure compensation structure; the transformer secondary wiring board matched by cooperative enterprises, to ensure the annual leakage rate less than 1%,
d. Inner Current Transformer adopts micro crystallizing alloy high magnetic materials, with accurate class up to grade 0. 2 or grade 0.2S. According to users' needs, it can be matched with 12 transformers, to meet the load line of 50 km without restrike
Item | Unit | Data | |
Rated voltage | KV | 40.5 | |
Rated insulation level | Lightning impulse withstand voltage(peak value) | KV | 185 |
1min power frequency | KV | 95 | |
Rated current | A | 2000 | |
Mechanical life time | time | 3000 | |
Rated air pressure of SF6 (psig at 20℃) | Mpa | 0.05 | |
Alarm pressure/Min function pressure (psig at 20℃) | Mpa | 0.47/0.45 | |
Rated short-circuit breaking current
| KA | 40 | |
Rated short circuit making current (peak value)
| KA | 100 | |
Rated short time withstand current (thermal stability current) | KA | 40 | |
Rated peak withstand current (dynamic stability current) | KA | 100 | |
Rated out of step breaking current | KA | 10 | |
Rated breaking times under short circuit breaking current | time | 12 | |
Rated short circuit duration | S | 4 | |
Closing time (under rated operation voltage) | S | ≤0.1 | |
Opening time (under rated operation voltage) | S | ≤0.06 | |
Rated operating sequence | O-0.3s-CO-180s-CO | ||
Rated making single capacitor bank current
| A | 400 | |
Annual leakage rate
| % | ≤1 | |
SF6 water content(V/V) | ≤150*10-6 | ||
Rated operation voltage of matched CT14 spring operation mechanism | |||
Closing and opening coil voltage | V | AC: 220 380 DC: 18 110 220 | |
Energy storage motor voltage | V | AC: 220 380 DC: 110 220 | |
Weight of SF6 gas | kg | 8 | |
Weight of circuit breaker (including operation mechanism) | kg | 1400 |
Item | Unit | Data | Technical parameter |
Moving contact travel
| mm | 95±2 | Measure moving contact travel |
Opening distance between contacts
| mm | 60±1.5 | Measure distance between moving and fixed contact
|
Pole-to-pole closing synchronous | ms | ≤3 | Measure pole distance difference between moving and fixed contact |
Pole-to-pole opening synchronous | ms | ≤2 | Measure pole distance difference between moving and fixed contact
|
Main circuit resistance | mΩ | ≤120 | Measure DC voltage reduction
|
Closing speed
| m/s | 3.2±0.2 | Rated air pressure, measuring method
|
Opening speed
| m/s | 3.4±0.2 | Rated air pressure, measuring method
|
Closing buffer distance | mm | 9.5-11 | Under closing state
|
Spacer of closing buffer | mm | 1-2 | Under closing state
|
Partial 48.6kV | Pc | 20 | Measure by partial measuring device under rated air pressure; apply voltage 486kv on the two out-line ends of the circuit breaker for 1 min, then reduce the voltage to 28V to measure |
Disharge 28kV | Pc | 10 |