General description
Modern, indoor medium voltage Rotoblok SF type switchgear cubicles. They are designed for the distribution of three-phase electricity with 50 Hz rated frequency, and rated voltage up to 25 kV in industrial distribution networks. The switchgears are configured from single typical modules with diverse accessories. The information and technical data included in this catalogue allow the designer to build the switchgear from typical modules.
If different modules or dimensions are needed to configure and design the switchgear, please contact the manufacturer.
Characteristics
The Rotoblok SF switchgear is a two-part, indoor, air insulated switchgear in a zinc galvanized steel cubicle, with a single, primary busbar system. The switchgear is equipped with modern, three-position switch disconnectors and disconnectors in SF6 isolation. Each tank is made from stainless steel, which assures excellent technical condition throughout the switchgear’s life. The switchgear contains a primary busbar and cable compartment, while the arc-proof design ensures a high level of operator safety.
Distribution bays perform the following properties:
- smaller dimensions (compared to switchgears with air insulated apparatus) maintaining their high electrical parameters, such as: isolation level, rated current and short-circuit current resistance,
- two-compartment bay design, which allows separation of the primary busbar and power supply cables compartments,
- high operational reliability,
- long operation time, without cumbersome service operations,
- excellent corrosion resistance: switchgear is constructed from zinc coated metal,
- universality in designing different switchgear configurations with any number of bays,
- advanced and reliable switchgear switching apparatus including switch disconnectors and GTR SF type disconnectors (ZPUE) and IM6 (SAREL), VB-4S circuit breakers (ZPUE) or circuit breakers from other manufacturers,
- adapted for the installation of advanced protection and control apparatus,
- the possibility to mount the switchgear cubicle on the wall helps save space in the distribution room, which is important during modernization and the expansion of existing switchgears,
- quick and easy access to monitor and maintain the switchgear units,
- simple operation.
Safety and interlock system
- arc-proof design - resistance to internal arcing effects,
- specially reinforced bay structure (enclosures, locks, hinges),
- mechanical interlocks, which prevent incorrect switching procedures and touching the live apparatus,
- access to control gear and control circuits is possible when primary circuits are out of the operator’s reach,
- application of monitoring circuits, signaling, mechanical and electronic position indicators and inspection windows,
- application of three-position “activate- deactivate- ground” switch disconnectors and disconnectors with mechanical position indicators,
- application of fast grounding switches with an impulse operating mechanism,
- application of fast grounding switches with an impulse operating mechanism, which guarantee safety in case of short-circuit.
Basic technical data
Compliance with standards:
The Rotoblok type switchgear meets the requirements of the following standards:
- PN-EN62271-1 - “High Voltage Switchgear and Controlgear – Part 1: Common specifications”,
- PN-EN 62271-200 - “High Voltage Switchgear and Controlgear – Part 200: Altering current metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV”,
- PN-EN 62271-100 - “High Voltage Switchgear and Controlgear – Part 100: Alternating current circuit breakers”,
- PN-EN 62271-102 - “High Voltage Switchgear and Controlgear – Part 102: High voltage altering current disconnectors and grounding switches”,
- PN-EN 62271-103 - “High Voltage Switchgear and Controlgear – Part 103: Disconnectors with rated voltages above 1 kV and up to and including 52 kV”,
- PN-EN 62271-105 - “High Voltage Switchgear and Controlgear – Part 105: Alternating current switch-fuse combinations”.
Certified by the Electrotechnical Institute.
Technical data: |
||
Rotoblok SF | Rotoblok SF 36 | |
Nominal grid voltage | 20 kV | 30 kV |
Highest apparatus voltage | 25 kV | 36 kV |
Rated frequency/ number of phases | 50 Hz / 3 | |
Rated short-time power frequency withstand voltage | 50 kV / 60 kV | 70 kV / 80 kV |
Rated lightning impulse withstand voltage 1,2/50 µs | 125 kV / 145 kV | 170 kV / 195 kV |
Rated continuous current | 630 A | 630 A |
Rated short-time withstand current | up to 20 kA (1s) | up to 16 kA (1s) |
Rated peak current strength | up to 50 kA | up to 40 kA |
Internal arcing class | up to 16 kA (1s) | 16 kA (0,3s) |
Degree of protection | IP4X |
Service conditions: | |
Ambient temperature | |
- short-time maximum
|
+ 40°C
|
- maximum daily average
|
+ 35°C
|
- maximum yearly average
|
+ 20°C
|
- lowest prolonged
|
+ 25°C1)
|
Relative humidity | |
- maximum daily average
|
95%
|
- maximum monthly average
|
90%
|
- maximum daily average of vapour pressure
|
2,2 kPa
|
- maximum monthly average of vapour pressure
|
1,8 kPa
|
Atmosphere in installation location | no significant salt, steam, dust, smoke, flammable or corrosive gases pollution, and no icing, frost and dew |
Installation altitude | up to 1000 meters above sea level2) |
Vibrations | vibrations caused by external causes or earthquakes are not taken into account |
Notice:
*1) Unless the control-metering and protection unit manufacturer has stated otherwise.
*2) If the mounting altitude of the switchgear cubicle is higher than 1000 meters above sea level, the level of the switchgear insulation should be adjusted using an indicator compliant to 2.2.1 paragraph regulations of the PN-EN 62271-1 standard.
The maximum transformer power that can be connected and disconnected using GTR SF 2V, GTR SF 2VM and IM6P-TF disconnector depends on medium voltage: | ||
Nominal grid voltage | Rated current | Maximum transformer rated power |
6 kV | 44 A | 800 kVA |
10 kV | 57,7 A | 1000 kVA |
15 kV | 61,6 A | 1600 kVA |
20 kV | 57,7 A | 2000 kVA |
30 kV | 24,1 A | 1250 kVA |
In the Rotoblok SF switchgear, typical fuse links with thermal protection are used in accordance with IEC 282-1, DIN 43625 standards.
- GTR SF 1, IM6S - disconnector with grounding switch,
- GTR SF 1M - disconnector with grounding switch and engine drive,
- GTR SF 2V, IM6P-TF - fuse switch with grounding switch,
- GTR SF 2VM - fuse switch with grounding switch and engine drive,
- GTR SF 4, IM6P-TD - switch disconnector with grounding switch,
- VB-4S circuit breaker (or another, after consultation with the manufacturer).
Cable tray under MV Rotoblok SF and Rotoblok SF 36 type switchgears
The Rotoblok SF switchgear is a two-part, indoor, air insulated switchgear in a zinc galvanized steel cubicle, with a single, primary busbar system. The switchgear is equipped with modern, three-position switch disconnectors and disconnectors in SF6 isolation. Each tank is made from stainless steel, which assures excellent technical condition throughout the switchgear’s life. The switchgear contains primary busbar and cable compartments, while the arc-proof design ensures a high level of operator safety.
Notice!: Minimum distance from wall – 30 mm
- Exemplary bay with 1000, 500, 500 mm width (from the left side)
- Tray under the switchgear.
Notice!: Minimum distance from wall – 100 mm
- Exemplary bay with 1450, 750, 750 mm width (from the left side)
- Tray under the switchgear.
Cable cross section (mm2) | Bending radius (mm) | Tray depth k (mm) |
50 | 370 | 400 |
70 | 400 | 430 |
95 | 440 | 470 |
120 | 470 | 500 |
150 | 500 | 550 |
185 | 540 | 600 |
240 | 590 | 700 |
Cable cross section (mm2) | Bending radius (mm) | Tray depth k (mm) |
50 | 555 | 580 |
70 | 585 | 610 |
95 | 600 | 630 |
120 | 630 | 660 |
150 | 645 | 670 |
185 | 675 | 700 |
240 | 705 | 730 |
Rotoblok SF switchgear cable links
Feeder bay
Cable type | Cable termination | |||
Producent | Type | Cable cross-section [mm2] | ||
Cable type: single core with plastic sleeve, for example, YHAKXs, YHKX, XUHAKXs, XRUHKs, ... |
Tyco Electronics | POLT-24D/1XI | 70-240 | |
Barnier | 01100-EUIC 01300-EUEP |
50-240 50-240 |
||
F&G | EAVI 20 TI-24 |
35-240 35-240 |
||
ABB | SEI (Um ≤ 24 kV) SEHDI 20.2 |
50-240 25-35 and 300-630 |
||
3M | QT II | |||
Set number | Set number | |||
93-EB 62-1PL 93-EB 63-1PL 93-EB 64-1PL |
5641 5642 5643 |
25-95 95-240 240-500 |
||
EUROMOLD | ITK-224 | 25-240 | ||
CELLPACK | Unit number | Type | ||
266438 266439 |
CHE-I 24 kV 25-150 CHE-I 24kV 70-240 |
25-150 70-240 |
Rotoblok SF 36 switchgear cable links
Feeder bay
Cable type | Cable termination | |||
Manufacturer | Type | Cable cross-section [mm2] | ||
Cable type: single core with plastic sleeve, for example, YHAKXs, YHKX, XUHAKXs, XRUHKs, ... |
Tyco Electronics | POLT-42D/1XI POLT-42E/1XI |
50-120 150-300 |
|
3M | QT II | |||
Set number | Set number | |||
93-EB 62-1PL 93-EB 63-1PL 93-EB 64-1PL 93-EB 65-1PL |
5651 5652 5653 5654 |
25-50 50-150 120-240 240-630 |
||
EUROMOLD | ITK-236 | 50-150 | ||
CELLPACK | Unit number | Type | ||
194046 194047 |
CHE-I 36kV 50-150 CHE-I 36kV 150-400 |
50-150 150-400 |
Rotoblok SF switchgear bay variants
Lateral view and dimensions
- - Stainless steel tank filled with SF6 gas, with switching units
- - Drive compartment
- - Bushing insulators
- - Safety valve
Notice:
The pictures shown on the next pages present exemplary bay equipment. It is possible to configure the bays according to the customer’s needs. In such cases, please contact the manufacturer to request the pictures.
SL1 (feeder bay)
Notice:
Optional equipment on the electrical diagram is marked in red.
SL2 (feeder bay)
Notice:
Optional equipment on the electrical diagram is marked in red.
St2 (transformer bay)
Notice:
Optional equipment on the electrical diagram is marked in red.
SS1L(P*)) (coupler bay with switch disconnector or disconnector on the left side)
Notice:
Optional equipment on the electrical diagram is marked in red.
*) It is possible to design the bay in a mirror variant.
SS2L(P*)) (coupler bay with switch disconnector or disconnector on the left side)
Notice:
Optional equipment on the electrical diagram is marked in red.
*) It is possible to design the bay in a mirror variant.
SO1 (lightning arrester bay)
Notice:
Optional equipment on the electrical diagram is marked in red.
STpwł4 (bay with auxiliary transformer)
Notice:
Optional equipment on the electrical diagram is marked in red.
STpwł 25kVA + ST1 (bay with auxiliary transformer with maximum rated power 25kVA)
Notice:
Optional equipment on the electrical diagram is marked in red.
SWTp(5*)) (transformer bay)
Notice:
Optional equipment on the electrical diagram is marked in red.
*) Using support transformers instead of gland plates.
SWTp(5*)) (transformer bay with voltage meter)
Notice:
Optional equipment on the electrical diagram is marked in red.
*) Using support transformers instead of gland plates.
Rotoblok SF 36 switchgear bay variants
LL1 (feeder bay)
Notice:
Optional equipment on the electrical diagram is marked in red.
LT1 (transformer bay)
Notice:
Optional equipment on the electrical diagram is marked in red.
LS1L (coupler bay with disconnector on the left side)
Notice:
Optional equipment on the electrical diagram is marked in red.
LP1 (metering bay)
Notice:
Optional equipment on the electrical diagram is marked in red.