Outdoor Medium Voltage SF6 Gas Insulated Stand Type Circuit Breaker
Summary
RHB medium voltage circuit-breakers for outdoor installation use sulphur hexafluoride gas (SF6) to extinguish the electric arc and as the insulating medium.
Breaking in SF6 gas takes place without current chopping or generation of overvoltages.
These characteristics guarantee a long electrical life for the circuit-breaker and limited dynamic, di-electric and thermal stresses on the installation.
The GSH type of stored energy and free release mechanical operating mechanism allows opening and closing operations through local and remote control.
The operating mechanism, the activating kinematics of the moving contacts and the anti-condensation heater are located inside a tight metal enclosure which also acts as the support for the poles.
The above-mentioned structure is supported by a frame made of telescopic metal sections which allow the height of the circuit-breaker terminal to be adapted from 2800 mm to 3700 mm.
The metal enclosure has IP 54(*) degree of protection and is fitted with a tight door with an inspection window. The circuit-breaker is compact and ensures a high level of sturdiness and excellent mechanical reliability.
The enclosure is made out of a steel plate with adequate surface protection by a special metalising and painting process. The support structures are hot dip galvanised.
Fields of application
The metal enclosure has IP 54(*) degree of protection and is fitted with a tight door with an inspection window. The circuit-breaker is compact and ensures a high level of sturdiness and excellent mechanical reliability.
The enclosure is made out of a steel plate with adequate surface protection by a special metalising and painting process. The support structures are hot dip galvanised.
Breaking technique
The breaking principle of RHB circuit-breakers is based on compression and self-blast technique to obtain top performances at all breaking current values, with minimum arc times, gradual arc extinction without chopping, and no restriking or switching overvoltages.
This breaking technique - already widely appreciated
and used in high voltage circuit-breakers, has been introduced into medium voltage with the HM4 series circuit-breakers for indoor installation.
Main contact separation
No electric arc is struck because the current flows through the arcing contacts. During its run downwards, the moving apparatus compresses the gas in the lower chamber. The compressed gas flows from the lower to the upper chamber, thereby taking both the chambers to the same pressure.
Arcing contact separation
The current flows due to the electric arc which has struck between the arcing contacts. The gas cannot escape through the nozzle because the hole is still closed by the fixed arcing contact and cannot even escape through the inside of the arcing contact, because of the clogging effect of the electric arc.
Standards and service
The RHB circuit-breakers comply with the IEC 62271- 100 standard as well as of other major industrialised countries. They have undergone the tests indicated ensure service safety and reliability of the apparatus in all installations.
The mechanical and electrical locking devices have been provided to prevent incorrect operations and to carry out inspection of the installations while guaranteeing maximum operator safety.
Main technical data
1.We have more than 10 years experience for electrical industry.
2.We can offer professional online and technical supports.
3.Rich experienced sales service and suggestions.
4.The competitive price and reliable quality products.
5.One to one service for each customers.
FAQ:
1.Do you have KEMA certificate?
Yes. We have KEMA certificates for some products. We will achieve all of main products certificated with KEMA one by one in the future.
2.What's your payment term?
We accept TT, 30% deposit and 70% balance against copy of BL.
3.How about the delivery time?
Usually it will take about 15-20 days. But it depends on your required quantity.
4.How about the packing?
We use standard export wooden package or Iron bracket.
5.Can you accept OEM?
Yes.
6.What's your main market?
Our products are popular in Indonesia, Philippines, Russia, USA, Middle East, West Africa, Vetnam, South Africa, Tanzania, Zambia, Kenya ect.
We are constantly expanding the markets.
Summary
RHB medium voltage circuit-breakers for outdoor installation use sulphur hexafluoride gas (SF6) to extinguish the electric arc and as the insulating medium.
Breaking in SF6 gas takes place without current chopping or generation of overvoltages.
These characteristics guarantee a long electrical life for the circuit-breaker and limited dynamic, di-electric and thermal stresses on the installation.
The GSH type of stored energy and free release mechanical operating mechanism allows opening and closing operations through local and remote control.
The operating mechanism, the activating kinematics of the moving contacts and the anti-condensation heater are located inside a tight metal enclosure which also acts as the support for the poles.
The above-mentioned structure is supported by a frame made of telescopic metal sections which allow the height of the circuit-breaker terminal to be adapted from 2800 mm to 3700 mm.
The metal enclosure has IP 54(*) degree of protection and is fitted with a tight door with an inspection window. The circuit-breaker is compact and ensures a high level of sturdiness and excellent mechanical reliability.
The enclosure is made out of a steel plate with adequate surface protection by a special metalising and painting process. The support structures are hot dip galvanised.
Fields of application
The metal enclosure has IP 54(*) degree of protection and is fitted with a tight door with an inspection window. The circuit-breaker is compact and ensures a high level of sturdiness and excellent mechanical reliability.
The enclosure is made out of a steel plate with adequate surface protection by a special metalising and painting process. The support structures are hot dip galvanised.
Breaking technique
The breaking principle of RHB circuit-breakers is based on compression and self-blast technique to obtain top performances at all breaking current values, with minimum arc times, gradual arc extinction without chopping, and no restriking or switching overvoltages.
This breaking technique - already widely appreciated
and used in high voltage circuit-breakers, has been introduced into medium voltage with the HM4 series circuit-breakers for indoor installation.
Main contact separation
No electric arc is struck because the current flows through the arcing contacts. During its run downwards, the moving apparatus compresses the gas in the lower chamber. The compressed gas flows from the lower to the upper chamber, thereby taking both the chambers to the same pressure.
Arcing contact separation
The current flows due to the electric arc which has struck between the arcing contacts. The gas cannot escape through the nozzle because the hole is still closed by the fixed arcing contact and cannot even escape through the inside of the arcing contact, because of the clogging effect of the electric arc.
Standards and service
The RHB circuit-breakers comply with the IEC 62271- 100 standard as well as of other major industrialised countries. They have undergone the tests indicated ensure service safety and reliability of the apparatus in all installations.
The mechanical and electrical locking devices have been provided to prevent incorrect operations and to carry out inspection of the installations while guaranteeing maximum operator safety.
Main technical data
| Circuit-breaker on column | RHB-12/24 | RHB-36 | RHB-40 | ||||
| Standards | IEC 62271-100 | • | • | • | |||
| Rated voltage | Ur [kV] | 12/24 | 36 | 40.5 | |||
| Rated insulation voltage | Us [kV] | 12/24 | 36 | 40.5 | |||
| Withstand voltage at 50 Hz | Ud (1 min) [kV] | 70 (dry) / 60 (wet) | 95 (dry) / 80 (wet) | 95 (dry) / 80 (wet) | |||
| Impulse withstand voltage | Up [kV] | 125/150 | 200 | 200 | |||
| Rated frequency | fr [Hz] | 50-60 | 50-60 | 50-60 | |||
| Rated normal current (400C) | lr [A] | 1250 | 2500 | 1250 | 2500 | 1250 | 2500 |
| Rated breaking capacity | Isc [kA] | 25 | 25 | 25 | 25 | 25 | 25 |
| 31.5 | 31.5 | 31.5 | 31.5 | 31.5 | 31.5 | ||
| Rated short-time | Ik [kA] | 25 | 25 | 25 | 25 | 25 | 25 |
| withstand current (3 s) | 31.5 | 31.5 | 31.5 | 31.5 | 31.5 | 31.5 | |
| Making capacity | Ip [kA] | 63 | 63 | 63 | 63 | 63 | 63 |
| 80 | 80 | 80 | 80 | 80 | 80 | ||
| Operation sequence | [O-0, 3s-CO-15s-CO] | • | • | • | |||
| Opening time | [ms] | 45+10 | 45+10 | 45+10 | |||
| Arcing time | [ms] | 10-15 | 10-15 | 10-15 | |||
| Total breaking time | [ms] | 55-60 | 55-60 | 55-60 | |||
| Closing time | [ms] | 75+10 | 75+10 | 75+10 | |||
Overall dimensions | on frame | 3090 - 3840 | 3090 - 3840 | 3090 - 3840 | |||
| H [mm] | |||||||
| L [mm] | 900 | 900 | 900 | ||||
| P [mm] | 686 | 686 | 686 | ||||
| Weight | [Kg] | 900 | 900 | 900 | |||
| SF6 gas absolute pressure | Rated service value [kPa] | 380 | 380 | 550 | |||
| Operating temperature (1) | [0C] | -25...+40 | -25...+40 | -25...+40 | |||
| Tropicalisation | IEC: 60068-2-30, 721-2-1 | • | • | • | |||
| Electromagnetic compatibility | IEC: 60694, 61000-6-2, 61000-6-4 | • | • | • | |||
| Solar radiation | [W/m2] | 1000 | 1000 | 1000 | |||
| Presence of pollution | IEC 815 - table 1 | Level III | Level III | Level III | |||
| Creepage distance | [cm/kV] | 2.5 | 2.5 | 2.75 | |||
| Ice coating | [mm] | 10 | 10 | 10 | |||
| Wind speed | [m/s] | 34 | 34 | 34 | |||
| Earthquake resistance | [g] | 0.3 | 0.3 | 0.3 | |||
Static force on the terminals | Longitudinal [N] | 750 | 750 | 750 | |||
| Transversal [N] | 500 | 500 | 500 | ||||
| Vertical [N] | 750 | 750 | 750 | ||||
| (1) For lower operating temperatures, please consult us. | |||||||
Zhejiang Power Tech Electric Co.,Ltd.
Zhejiang Power Tech Electric Co.,Ltd. which is specialized in producing, developing and marketing power transmission and distribution products. The company is established in 2017, the subsidiary of Wenzhou Rockwill Group, which is located in Quzhou City, Zhejiang Province, China.
Why Choose Us!1.We have more than 10 years experience for electrical industry.
2.We can offer professional online and technical supports.
3.Rich experienced sales service and suggestions.
4.The competitive price and reliable quality products.
5.One to one service for each customers.
FAQ:
1.Do you have KEMA certificate?
Yes. We have KEMA certificates for some products. We will achieve all of main products certificated with KEMA one by one in the future.
2.What's your payment term?
We accept TT, 30% deposit and 70% balance against copy of BL.
3.How about the delivery time?
Usually it will take about 15-20 days. But it depends on your required quantity.
4.How about the packing?
We use standard export wooden package or Iron bracket.
5.Can you accept OEM?
Yes.
6.What's your main market?
Our products are popular in Indonesia, Philippines, Russia, USA, Middle East, West Africa, Vetnam, South Africa, Tanzania, Zambia, Kenya ect.
We are constantly expanding the markets.