Modular medium-voltage switchgear. NorMax

Transcription

1 Modular medium-voltage switchgear NorMax

2 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 2 NorMax Modular medium-voltage switchgear Contents Subject Page Table of contents 2 Introduction and main features 2 Technical specification 3 Structure of NorMax 4 Main components 5 Load-break switch cubicle MaxLo 6 Fused load-break switch cubicle MaxFu 7 Circuit breaker cubicle MaxBr 8 Measurements cubicle MaxMe 9 Measurements cubicle with earthing switch MaxMe/E 10 Cabling cubicle MaxCa 11 Introduction and main features Versatile and safe technical solutions Norelco NorMax is modular switchgear for 12 and 24kV voltage levels. NorMax has been type- tested to provide versatile and safe secondary distribution. NorMax is a perfect choice for secondary substations for various use, e.g. commercial buildings and CSS. For more heavier use we recommend using Norelco NorMega 12 and 24kV switchgears. NorMax switchgear consists of different modules. NorMax MODULES AND DIMENSIONS Module Type Dimensions Width mm Height mm Depth mm Weight kg Load-break switch MaxLo Fused load-break switch MaxFu Circuit breaker MaxBr Measurement MaxMe Measurement with earthing switch MaxMe/E Cabling MaxCa NorMax is an environmentally friendly switchgear with minimized amount of SF6-gas. Thermal-imaging for cable connections is optionally available. NorMax has top-notch usability and low overall costs for its entire life cycle.

3 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 3 Easy installation with low costs Installation of NorMax-switchgear is easy thanks to minimum cubicle width of 500mm. NorMax has several advantages when customer wants to reduce overall costs of medium voltage switchgear: no expensive angled cable termination needed, only odinary indoor cable termination is required load switch cubicle has room for surge protectors, no need for special cable termination components and cubicles are individually replaceable, no need to replace whole switchgear Quick and secure investment Norelco has standard NorMax modules on stock and NorMax can be delivered in short notice. Customized modules are manufactured upon request at Norelco s factory. Norelco offers extensive product support and service. Norelco can also take care of installation of NorMax switchgear if needed. Technical specification Type-approved switchgear with confidence NorMax has been tested in conformity with Finnish and international standards. Norelco takes part SGS Fimko s quality- auditions to ensure quality in type-tested switchgears and in manufacturing process. Technical specification of NorMax switchgear: TECHNICAL SPECS Type NorMax 12 / NorMax 24 Rated frequence fr 50 / 60 Hz Rated voltage Ur 12 / 24 kv Rated current Ir 630A Rated power-frequency withstand voltage Ud 28 / 50 kv (1min) Rated lightning impulse withstand voltage Up 75 /125 kv Rated short-circuit withstand current Ik 20 ka / 1s Rated peak withstand current Ip 50kA Internal arc fault class IAC AFL 16 ka/ 1s Protection against electric shock Protective earthing Partition class Metal-Clad / PM Use category LSC2 Degree of protection IP 20 C Ambient temperature C

4 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 4 Structure of NorMax Cubicle type switchgear with partitions NorMax is a cubicle type switchgear that has partitions separated with metal sheets. The partitions are divided into 4 different types: 1.. Busbar compartment air-insulated space in the top part of the switchgear busbar stretches to every cubicle 2. Load switch compartment SF6-gas insulated load switch that has 3 positions: on, off and earthed gas pressure indicator located on the front panel 3. Cabling compartment generous space for cable termination spare space for accessories e.g. surge protectors mechanically locked door when cubicle is energized bottom plate with pass-through holes for cables cabling compartment and its door form the lower partition 4. Low-voltage compartment contains all monitoring relays and auxiliary components optionally contains terminals for control and alarm contacts and tripping coil terminals low-voltage and busbar compartments form the upper partition Picture: switch NorMax with one fused load switch, two load switches and measuring cubicle with earthing

5 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 5 Easy-to-use control panel NorMax has a control panel that is very easy and intuitive to operate even if the user is not yet familiar with NorMax. The user operations are done only with one lever that is used to operate load-break switch and earthing switch. All user errors and dangerous functions are prevented mechanically. Also the cabling compartment door is mechanically locked when the live voltage is present. The locking mechanism itself has a place for a pad-lock to make switchboard safe during maintenance. On and Off -operations of load-break switch are done via push buttons. Loadbreak switch and circuit breaker cubicles have fixed voltage indicators as standard. Busbars Busbars between load-break switches are made of round aluminium tube to Control panel is intuitive and prevents any dangerous actions. minimize risk of short circuit. Cable and measuring cubicles have busbars made of copper. Earthing busbar is always made of copper. Structural components Cubicle frame is made of hot-zinc steel plates that have strong coat of zinc (275g/m2). Surface treatment is made with powder coating paint. Switchgear has detachable bottom plates that can be removed during cable installation. Optionally NorMax can be ordered with detachable pedestal fronts. Main components Load-break switch makes it all All cubicles are based on load-break switch. It is SF6-gas insulated load-break switch that has three positions (on, off, earthed). Load-break switch is always equipped with gas pressure indicator that is located on the front panel. Fused load-break switch gives protection to equipment and users Fused load-break switch has holders for medium voltage fuses. Overcurrent blows the fuse and causes the load-break switch to trip. The fused load-break switch is equipped with two earthing switches that ground both sides of the fuse. Changing the fuse is therefore always safe for user. Circuit breaker enables versatile supervision and protection NorMax switchgear uses maintenance-free vacuum circuit breaker that is capable of working at low ambient temperatures (as low as -40 degrees in Celsius). Alternatively also other circuit breakers (vacuum or SF6) can be fitted into the circuit breaker cubicle. Norelco uses reliable overcurrent, short circuit and earth fault current relay protection. Alternative relay according customer needs can be fitted. Maintenance-free vacuum circuit breaker is capable of working at low ambient temperatures.

6 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 6 Load-break switch cubicle MaxLo Load-break switch cubicle is used as an incoming, ring main or branch unit. The cubicle has SF6-gas insulated load switch with its control device. The main busbar is air-insulated. To avoid any user error, the switch can only be in one position: open, closed or earthed. The switch must be in earthed-position in order to gain access to cabling compartment. All positions are indicated on the front control panel. The usage of the load-break switch is simple and all user errors have been prevented mechanically. All control functions are done with a single lever. The basic structure of the cubicle enables revisions and component change. Upper compartment: SF6-gas insulated load-break switch with 3 positions control device with mechanical position indicators metal-enclosed main busbar integrated low voltage compartment with door locking mechanism fixed voltage indicator L1-L3 SF6-gas pressure indicator Lower compartment: metal-enclosed cabling compartment with mechanically locked door bottom plate with pass-through holes for cables earthing busbar Optional equipment auxiliary contacts for open (2no+2nc) and closed (2no+2nc) position arc-pressure release channel air insulated surge protectors short-circuit indicator with indication spring charge motor SF6-gas pressure indicator with auxiliary contacts

7 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 7 Fused load-break switch cubicle MaxFu Fused load-break switch cubicle is used as transformer feeder or protection. The cubicle has SF6-gas insulated load switch and separate earthing switch with control device. The main busbar is air-insulated. The fused load-break switch is equipped with two earthing switches that ground both sides of the fuse. Changing the fuse is therefore always safe for user. If overcurrent blows one fuse, it opens all load-break switch contacts (3 phases). To avoid any user error, the switch can only be in one position: open, closed or earthed. The switch must be in earthed-position in order to gain access to cabling compartment. All positions are indicated on the front control panel. The usage of the load-break switch is simple and all user errors have been prevented mechanically. All control functions are done with a single lever. The basic structure of the cubicle enables revisions and component change. Upper compartment: SF6-gas insulated fused load-break switch with 3 positions control device with mechanical position indicators metal-enclosed main busbar integrated low voltage compartment with door Locking mechanism fixed voltage indicator L1-L3 SF6-gas pressure indicator Lower compartment: earthing switch metal enclosed cabling compartment with mechanically locked door bottom plate with pass-through holes for cables earthing busbar Optional equipment auxiliary contacts for open (2no+2nc) and closed (2no+2nc) position auxiliary contacts for blown fuse (1no+1nc) arc-pressure release channel SF6-gas pressure indicator with auxiliary contacts

8 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 8 Circuit breaker cubicle MaxBr Circuit breaker cubicle is used for switching and protection in distribution, and for motors, transformers and capasitors. Cubicle is equipped with a fixed vacuum or SF6-gas insulated circuit breaker with its protection relay. The cubicle has also SF6-gas insulated load switch and separate earthing switch with control device. The load-break switch is between main busbar and the circuit breaker. The main busbar is air-insulated. To avoid any error, the switch can only be in one position: open, closed or earthed. The loadbreak switch must be in earthed-position in order to gain access to circuit breaker compartment. All positions are indicated on the front control panel. The usage of the load-break switch and the circuit breaker is simple and all user errors have been prevented mechanically. All control functions are done with a single lever. The basic structure of the cubicle enables revisions and component change. Upper compartment: SF6-insulated load-break switch with 3 positions control device with mechanical position indicators metal-enclosed main busbar integrated low voltage compartment with door locking mechanism fixed voltage indicator L1-L3 SF6-gas pressure indicator protection relay Lower compartment: circuit breaker cable current transformer earthing switch metal-enclosed cabling compartment with mechanically locked door bottom plate with pass-through holes for cables earthing busbar Optional equipment auxiliary contacts for open (2no+2nc) and closed (2no+2nc) position arc-pressure release channel spring charge motor SF6-gas pressure indicator with auxiliary contacts

9 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 9 Measuring cubicle MaxMe Measuring cubicle is used for medium-voltage measurement. The cubicle has very versatile construction that can be adapted to customer s needs. MaxMe is the basic model for measuring without earthing switch. The MaxMe cubicle can be equipped with voltage and current transformers. The main busbar for measuring cubicle is customized for every order. The basic structure of the cubicle enables revisions and component change. User actions and maintenance tasks are easily taken care of in spacious measuring cubicle. main busbar lower compartment with pad-lockable door integrated low voltage compartment with door pass-through holes for busbar earthing points terminal blocks and fuses for secondary measurement space for transformers earthing busbar Optional equipment fixed voltage indicator L1-L3 arc-pressure release channel current transformers voltage transformers with ferro-resonance damping resistance

10 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 10 Measuring cubicle MaxMe/E Measuring cubicle is used for medium-voltage measurement. The cubicle has very versatile construction that can be adapted to customer s needs. MaxMe/E is always equipped with earthing switch. The MaxMe/E cubicle can be equipped with voltage and current transformers. The main busbar for measuring cubicle is customized for every order. The basic structure of the cubicle enables revisions and component change. User actions and maintenance tasks are easily taken care of in spacious measuring cubicle. main busbar air-insulated earthing switch lower compartment with pad-lockable door integrated low voltage compartment with door pass-through holes for busbar terminal blocks and fuses for secondary measurement space for transformers earthing busbar Optional equipment fixed voltage indicator L1-L3 arc-pressure release channel current transformers voltage transformers with ferro-resonance damping resistance

11 NorMax MODULAR MEDIUM-VOLTAGE SWITCHGEAR 11 Cabling cubicle MaxCa Cabling cubicle is used when the direct cable connection to the main busbar is needed. The MaxCa cubicle is placed as the first or the last cubicle of the switchgear. The cubicle has connection point for incoming cabling. The cabling compartment door can only be opened with a tool. The cubicle has also connection point for earthing. The MaxCa has space for accessories like surge protectors. Upper compartment: main busbar integrated low voltage compartment with door pass-through holes for busbar earthing points Lower compartment: metal-enclosed cabling compartment with mechanically locked door option to connect parallel incoming cables bottom plate with pass-through holes for cables earthing busbar Optional equipment fixed voltage indicator L1-L3 arc-pressure release channel air-insulated surge protectors short-circuit indicator with visual indication

12 Large selection of high quality LV and MV switchboards and substations The main products of Norelco include: NorSwitch Factory Made Primary Substation NorMega Withdrawable MV Switchgear Modular MV Switchboard System NorMax Modular Secondary Substation NPM 200 Modular IP54 Switchboard System NorPower 1250 Modular IP30 Switchboard System NorLine 800 Power Factor Compensation System Norelco NACB Switch Quality On Standard Secondary Substation NPM 300 Power Factor Compensation Systems NACB Motor Control Center NorPower 5000 Busbar Trunking System NorBus 5000 norelco.fi norelco.fi Norelco Oy, PO.Box 28, FI SAVONLINNA, Finland tel (0) , fax (0)