General
HR4 type high voltage indoor SF6 gas circuit breaker with two installation way by drawable/Fixed. which is widely application for three-phase AC power system of rated voltage from 3.3kV up to 36kV at frequency 50/60Hz, especially using for power plant, transformer substation, petrol chemical industry, metallurgy, manufacturing industry, airport, residential area, etc..
Its high performance switchgear which will reduce over-voltage and harmonic impulse at max for by a normal or fault breaking or making.
Its easy for interchange for VD4,SF1,HD4 type switchgear like type KYN28 or AMS, ABB type ZS1 series, etc.
This circuit breaker is follow per standards like:
IEC62271-100 AC high voltage circuit breaker,
GB1984-2003 AC high voltage circuit breaker
JB3855 3.6-40.5Kv indoor AC High voltage circuit breaker
DL/T403 Specification of 12-40.5kV indoor High voltage vacuum circuit breaker.
Service environment
a) Air temperature: Maximum temperature: +40°C; Minimum temperature:-25°C
b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level: Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
Main technical specifications
|
No |
Item |
Unit |
Parameter |
|
|
1 |
Rated voltage |
kV |
12/17.5 |
24/36/40.5 |
|
2 |
Rated frequency |
Hz |
50/60 |
|
|
3 |
Rated current |
A |
630, ……4000A |
|
|
4 |
1min Power frequency withstand voltage |
kV |
48 |
65/70/85 |
|
5 |
Lightning impulse withstand voltage |
kV |
75/95 |
125/200 |
|
6 |
Rated short circuit breaking current (peak) |
kA |
50/63/80/100 |
|
|
7 |
Rated active load and close circuit breaking current |
A |
63 |
50 |
|
8 |
Rated short breaking current |
kA |
20, …40 |
|
|
9 |
Rated short circuit making current (peak) |
kA |
50/63/80/100 |
|
|
10 |
Rated cable(line) charging breaking current |
A |
50 and 10 |
|
|
11 |
Rated capacitor bank switching current |
A |
400 |
|
|
12 |
Rated withstand current (peak) |
kA |
50/63/80/100 |
|
|
13 |
Short time withstand current (4s) |
kA |
20, …40 |
|
|
14 |
Mechanism life |
times |
10000 |
|
Note: For short circuit breaking current & rated current is optional by clients.
