The HXGN17-11(24) vacuum ring main unit is a power supply unit and terminal distribution equipment designed for power distribution systems for industrial and mining enterprises, residential areas, high-rise buildings and schools where the indoor AC voltage is 10kV and rate is 50Hz. It can open and close rated load currents and transformers with no-load currents. And it can also open and close a certain distance of the capacitor current of overhead lines, cable lines and capacitor combinations. The load switch (fuse combination cabinet) can close rated short-circuit currents instantly. In the power system, the vacuum ring main unit is used as protection for distribution equipment, distribution of electricity, and protection and control of the transformer.
The HXGN17-11(24) vacuum ring main unit is used as protection of distribution equipment, distribution of electricity, and protection and control of the transformer; which is suitable for city networks, distribution network transformation, and residential areas.
| Parameters | Load-break switch (Cabinet C) | Circuit breaker (Cabinet V) | Composite apparatus (Cabinet F) | Disconnecting switch, grounding switch | |
| Rated voltage (kV) | 11/24 | 11/24 | 11/24 | 11/24 | |
| Rated current (A) | 630 | 630 | 630 | 630 | |
| Rated frequency (Hz) | 50 | 50 | 50 | 50 | |
| extinguishing arc mode | vacuum | vacuum | vacuum | ||
| power- frequency withstand voltage (kV) | line-to-line | 42 | 42 | 42 | 42 |
| line-to- ground | 48 | 48 | 48 | 48 | |
| lightning impulse (kV) | line-to-line | 75 | 75 | 75 | 75 |
| line-to- ground | 85 | 85 | 85 | 85 | |
| Rated short-circuit breaking current (kA) | 20 | ||||
| Rated short-circuit breaking current breaking times | 30 | ||||
| Rated short-circuit current (kA) | 50 | 50 | 50 | ||
| Rated short-time withstand current(kA) | 20 | 20 | 20 | ||
| Rated short-circuit duration (S) | 4 | 4 | 4 | ||
| Rated peak withstand current (kA) | 50 | 50 | 50 | ||
| Rated cable charging breaking current (A) | 10 | ||||
| Take over current (A) | 1750 | ||||
| Arc duration (S) | 0.5 | 0.5 | 0.5 | 0.5 | |
| partial discharge (Pc) | ≤5 | ≤5 | ≤5 | ||
| IP | IP67 | IP67 | IP67 | IP67 | |
| Mechanical service life | 10000/30000 | 10000/30000 | 10000/30000 | 3000 | |
| Size | 400*825*1475 | 400*825*1475 | 400*825*1475 | ||
-The cabinet of the vacuum ring main unit is made of bent zinc aluminum coated steel sheet, so that it has firm structure, good sealing, and IP3X shell protection.
-The cabinet has two completely isolated intervals: bus room and switch room. This kind of interval does not append isolated board to ensure safety and replace the fuse. The bus room is sealed by metal, and the bus is connected by a wall-through sleeve. According to the requirements, the front of the bus room can be equipped with fully isolated instrument room, special for installation of secondary equipment. The switch room is mainly used for installation of primary equipment and cable connection. The door and switch of the switch room is mechanical interlocking, which is simple and reliable. The cabinet door is equipped with an observation window to observe the isolated fracture and inspect the running state.
-The main switch is a FZ(R)N series, this kind of switch is simple to operate, safe and reliable. The opening and closing uses manual operation, coordinating with the CS6 operation structure, so that it can open and close rapidly.
-The product can be divided into three parts: cable compartment, bus compartment and control department. There is a locking device in the front and back doors, you can open the front and back door only if the medium-voltage is disconnected.
| Item | Parameters |
| Ambient temperature | |
| Max temperature (≤℃) | 50 |
| Min temperature (≤℃) | -40 |
| Max temperature difference (k) | 25 |
| Ambient humidity | |
| Daily relative temperature (≤℃) | 95 |
| Monthly relative temperature (≤℃) | 90 |
| Working conditions | |
| Altitude (≤m) | 1000 |
| Solar radiation intensity | 0.1 |
| Pollution Grade | IV |
| Icing-thickness (≤cm) | 10 |
| Wind speed (m/s) / wind pressure (pa) | 34/700 |
| Earthquake-resistant ability (g) | 0.2 |
| IP grade | |
| SF6 gas cabinet | IP67 |
| Use holder | IP67 |
| Cabinet | IP67 |
Operating mechanism, disconnecting switch, grounding switch and cable cabinet are "five-anti" interlocking, which is used to prevent misoperation.
Cabinet C(load-break switch) operating instructions:
-Operating hole: master switch (up), grounding switch load switch (down); master switch interlocking grounding switch, grounding switch interlocking cable Cabinet.
-Open/closed operation of master switch: clockwise is open, counter-clockwise is closed.
-Open/close indicator: refer to the main bus-bar icon, same color with the main bus-bar icon is open, different color with the main bus-bar icon is closed.
-Note: Before opening the grounding switch, please make sure the master switch to be closed, meanwhile, the cable is without power.
| XCN(W)-C-11(24)/630 | ||||
| Wiring diagram | ||||
| Switch cabinet name | Load-break switch (Cabinet C) | |||
| Switch cabinet configuration | Standard configuration | Optional configuration | ||
| Main components | Load-break switch | √ | ||
| Operating mechanism | √ | |||
| Live Displayer | √ | |||
| Fault indicator/ | √ | |||
| Potential transformer (PT) | √ | |||
| Current transformer(CT) | √ | |||
| Voltmeter | √ | |||
| Ammeter | √ | |||
| Arrester | √ | |||
| Cable accessories | ||||
| Operation types | Manual type | Electric type/Manual type | ||
| Size (Width*Depth*height) | 350*780*1307cm | |||
Cabinet D (circuit breaker Cabinet) operating instructions:
-Operating hole: Energy storage switch (Up), grounding switch load switch (down).
-Open/closed operation of master switch: the master switch have to be energy storage before opening the switch, clockwise is Energy storage.
-Open/closed operation of grounding switch: counter-clockwise is open , clockwise is closed.
-Open/close indicator : refer to the main bus-bar icon, same color with the main bus-bar icon is open, different color with the main bus-bar icon is closed.
-Note: Before opening the grounding switch, please make sure the master switch to be closed, meanwhile, the cable is without power.
| XCN(W)-C-11(24)/630 | ||||
| wiring diagram | ||||
| Switch cabinet name | Load-break switch (Cabinet C) | |||
| Switch cabinet configuration | Standard configuration | Optional configuration | ||
| Main components | Circuit breaker switch | √ | ||
| Operating mechanism | √ | |||
| Live Displayer | √ | |||
| Fault indicator | √ | |||
| Protection device | √ | √ | ||
| Potential transformer | √ | |||
| Current transformer(CT) | √ | √ | ||
| Voltmeter | √ | |||
| Ammeter | √ | |||
| Arrester | √ | |||
| Cable accessories | √ | |||
| Operation types | Manual type | Electric type/Manual type | ||
| Size (Width*Depth*height) | 350*780*1307cm | |||
Cabinet F (combination electric equipment) operating instructions:
-Operating hole : Energy storage switch (Up) , grounding switch load switch (down).
-Open/closed operation of master switch: the master switch have to be energy storage before opening the switch, clockwise is energy storage.
-Open/closed operation of grounding switch: counter-clockwise is open , clockwise is closed.
-Open/close indicator : refer to the main bus-bar icon, same color with the main bus-bar icon is open, different color with the main bus-bar icon is closed.
-Note: Before opening the grounding switch, please make sure the master switch to be closed, meanwhile, the cable is without power.
| XCN(W)-C-11(24)/630 | ||||
| Wiring diagram | ||||
| Switch cabinet name | Load-break switch (Cabinet C) | |||
| Switch cabinet configuration | Standard configuration | Optional configuration | ||
| Main components | Load-break switch | √ | ||
| Operating mechanism | √ | |||
| Live Displayer | √ | |||
| Fault indicator | √ | |||
| fuse | √ | |||
| Potential transformer | √ | |||
| Current transformer(CT) | √ | |||
| Voltmeter | √ | |||
| Ammeter | √ | |||
| Arrester | √ | |||
| Cable accessories | ||||
| Operation types | Manual type | Electric type/Manual type | ||
| Size (Width*Depth*height) | 360*780*1307cm | |||
Cabinet G (circuit breaker with disconnecting switch) operating instructions:
-Operating hole : Energy storage switch (Up), grounding switch load switch(down); master switch interlocking disconnecting switch, disconnecting switch interlocking grounding switch, grounding switch interlocking cable Cabinet.
-Open/closed operation of master switch: the master switch have to be energy storage before opening the switch, clockwise is energy storage.
-Open/closed operation of grounding switch: counter-clockwise is open, clockwise is closed.
-Open/close indicator : refer to the main bus-bar icon, same color with the main bus-bar icon is open, different color with the main bus-bar icon is closed.
-Note: Before opening the grounding switch, please make sure the master switch to be closed, meanwhile, the cable is without power.
-Disconnecting switch does not admit on-load operation.
| XCN(W)-C-11(24)/630 | ||||
| Wiring diagram | ||||
| Switch cabinet name | Circuit breaker with disconnecting switch (Cabinet V) | |||
| Switch cabinet configuration | Standard configuration | Optional configuration | ||
| Main components | circuit breaker with disconnecting switch | √ | ||
| Operating mechanism | √ | |||
| Live Displayer | √ | |||
| Fault indicator | √ | |||
| Protection device | √ | |||
| Potential transformer | √ | |||
| Current transformer(CT) | √ | |||
| Voltmeter | √ | |||
| Ammeter | √ | |||
| Arrester | √ | |||
| Cable accessories | ||||
| Operation types | Manual type | Electric type, Manual type | ||
| Size (Width*Depth*height) | 360*780*1307cm | |||
