GAS INSULATED SWITCHGEAR MODEL HS-X (TYPE1) 12kV/24kV. Advanced environmentally friendly switchgear

Transcription

1 GAS INSULATED SWITCHGEAR MODEL HS-X (TYPE1) 12kV/24kV Advanced environmentally friendly switchgear

2 Advanced environmentally friendly switchgear Mitsubishi Electric Corporation has designed and manufactured a substantial amount of high quality switchgear all over the world. This vast experience was drawn on to produce the next generation of advanced environmentally friendly switchgear, the HS-X. Flexible design - Suitable for many applications High reliability - Years of trouble free operation The reliability has been increased even further by the application of an electro-magnetic vacuum circuit breaker () operating mechanism. With fewer parts 2 the chances of failures occurring have decreased. 2 35% less parts than conventional Mitsubishi Electric spring operating mechanism. Designed so that several orientations of cable terminations (power and control) entry are available, makes it one of the most flexible switchgear on the market. Safe Design - Ensures operator s safety In the event of an internal arc, any arc fault gas will be directed away from the operator (through the top of the panel). With the benefit of GIS design concepts, there are no live parts exposed inside the panel which ensures utmost safety for operators. Simple installation - Quick and easy No gas work is required during site installation and commissioning, which simplifies planning and reduces time required for installation, and maintains the high quality of the switchgear during transportation. Low maintenance - Reduction of maintenance costs The circuit breaker s advanced electro-magnetic operation does not require maintenance for over 15 years 3. The circuit breaker and disconnecting / earthing switch are hermetically sealed in a tank and together with the application of original antioxidation grease to the moving parts of the disconnecting switch enable smooth long-term operation for 15 years or more. 3 Under normal operation conditions according to IEC standard. User friendly - Simple operation A simple layout of the operating mechanisms and mimic diagram at the front of the panel leads to straightforward operation. Additionally this reduces the chance of missoperation. CONTENTS RATINGS FEATUR Compact size - Space saving The weight and required space for installation has been reduced 1 by the use of solid insulated busbars and the application of a multi-function relay. COMPONENTS 05 SAFE OPERATION & USER FRIENDLY 07 HIGH RELIABILITY AND COMPA SIZE % less space compared to Mitsubishi Electric existing GIS of the same ratings SWITCHGEAR ARRANGEMENT 11 Energy saving - Reduction of running costs FOUNDATION DRAWING MITSUBISHI HS-X The use of an electro-magnetic operating mechanism reduces the required operation energy by approximately 80% when compared to conventional spring operation mechanisms. Environmentally friendly - SF6 Free Mitsubishi Electric is the world leader in establishing compressed dry air insulation technology based on the design and development technologies of conventional SF6 switchgear. Under dry, clean and compression, air has good insulation properties, which makes it ideally suitable to be used as insulation for gas insulated switchgear. (Dry air insulation is an option) STANDARD & OPTIONAL SPECIFICATIONS 13 STANDARD ACCSORI 14 MITSUBISHI HS-X 02

3 RATINGS FEATUR GENERAL Multi-function relay Moduled control circuit Solid insulated busbar Rated voltage kv Rated frequency Hz Rated normal current of main busbars A Rated insulation levels BIL kv (peak) AC (1min) kv (rms) Rated short-time withstand current Rated duration of short-time current sec IEC / / Mitsubishi MP relays are installed as standard. This relay combines protection, measurement and control functions into one compact flush door mounted unit. Current transformer ratios are adjustable in combination with the use of wide range current transformers. Control devices and equipment and wiring are moduled. Functions are readily interchangeable and the enclosure of live parts provides a high level of reliability. The busbar is independently solidly insulated for each phase, which eliminates any chance of phase-to-phase faults. Also no gas work is required during site installation or maintenance. Insulation medium SF6 / Dry air 1 Rated gas pressure 1 MPa-abs SF6 : 0.13 SF6 : 0.13 Dry air : 0.13 Dry air : 0.17 Alarm gas pressure 1 MPa-abs SF6 : 0.12 SF6 : 0.12 Dry air : 0.12 Dry air : Insulation medium of dry air is an option and for 630A rating only. CIRCUIT BREAKER Rated voltage Type of circuit breaker Rated short-circuit breaking current Rated short-circuit making current Break time Rated operating sequence Type of operating mechanism kv cycles IEC Vacuum 63 3 O-1min-CO-3min-CO, O-0.3sec-CO-3min-CO, CO-15sec-CO Electro-magnetic Test terminal (Option) There is no need to disturb the cable terminations in order to carry out high voltage testing of cables. (Maximum applicable voltage : DC20kV10min) Three position disconnecting switch The earthing switch is unified with the disconnecting switch. DISCONNEING/EARTHING SWITCH Rated normal current (disconnecting switch) Rated short-time withstand current Operating mechanism (disconnecting switch) Operating mechanism (earthing switch) A IEC / 10 Manual 2 Manual Three position disconnecting switch operating mechanism The operating mechanism is simple making it user friendly and reduces the chances of miss-operation. Gas vessel The circuit breaker, disconnecting and earthing switch are hermetically sealed in the maintenance free dry air or SF6 insulated gas vessel. 2 Motor operation is an option. WIDE RANGE CURRENT TRANSFORMER IEC 44-1 ratio 3 Burden Accuracy class A VA / 5 or / P20 / Class 1.0 VOLTAGE TRANSFORMER 3 Transformer ratio can be adjusted in combination with MP multi-function relay. Electro-magnetic operating mechanism Plug-in termination (Option) Wide range current transformer Rated primary voltage Rated secondary voltage Rated tertiary voltage 4 Burden (secondary / tertiary) 4 Accuracy class V V V VA IEC , / / 3P 4 Tertiary winding is an option. A reduced number of parts increases the reliability of the. Also, a reduction in the required energy to operate the is achieved. Reduces the time required for cable termination work. Also cable voltage withstand testing can be easily performed by using a test terminal without removing the cables. Test terminal The ratios of the current transformers can be changed without physically changing the s in combination with multi-function relay (MP), providing great flexibility. LIGHTNING ARRTOR IEC 99-4 IEEE 386 or DIN Type Zinc oxide Rated voltage kv Normal discharge current 5, 10 Cable 03 MITSUBISHI HS-X MITSUBISHI HS-X 04

4 COMPONENTS Vacuum circuit breaker () The s operating mechanism is an electro-magnetic type. As the name implies, the electro-magnetic type of is driven by electro-magnets. The electrical power required is supplied by a capacitor (see below for auxiliary power requirements). 3 position disconnecting / earthing switch ( ) An earthing switch is unified with the disconnecting switch. The earthing switch is manually operated however the disconnecting switch is manually operated with motor operation as an option. The electro-magnetic has the following features: Main circuit close position Disconnecting position Earthing position Reliability increase The structure of the electro-magnetic operating mechanism is more simple than that of the spring operating mechanism, and required 35% less parts which significantly reduces the chances of failures. Maintenance reduction Main busbar The main busbar is independently and solidly insulated for each phase. During main busbar connection no gas work is required. Since the surface of the insulation is earth screened, there is no chance of phase-to-phase short circuits. Earth screen Connection piece Solidly insulated bus Conductor Bushing for bus With the use of an electro-magnetic operating mechanism, there is no need for major maintenance for over 15 years. 1 1 The service life of the capacitor should be 15 years under normal operation conditions. Energy required reduction The required energy is reduced by 80% (when compared to conventional spring operated mechanisms) by minimizing operation energy loss. Furthermore, noise during operation has been significantly reduced. DC power supply Close push button Plug in cable termination (Option) Plug in type cable terminations make cable connection work simple and efficient. IEEE or DIN standard plug in type terminations are applicable. Cross section of busbar Test terminal IEEE 386 or DIN Open push button Close charge completion lamp(led) : Out of scope Open charge completion lamp(led) Cable Auxiliary power / control circuit Electro-magnetic operating mechanism Closing capacitor Opening capacitor Arc pressure relief device Pressure relief devices are applicable for safety operation to prevent human injury in case of internal arc Relief flap Arc flap Operation / indication unit accidents. Vaccum circuit breaker FRONT CABLE Auxiliary power Equipment Capacity Remarks Electrical-magnet operation Capacitor charging current I(A) T(S) DC 110V (Open)I=5A,T=0.02 Sec (Close)I=0.4A,T=3.5 Sec Multi-function relay and wide range current transformer Flush mounted type multi-function relay MP covers protection, control, measurement and communication functions. In combination with the wide range, the ratios can be readily changed without the replacement of s. (For motor operation) Control power DC 100 / 110V, 0.5A Motor operation current I2(A) I1(A) 0.2(ms) DC 100V : I1=5A I2=1.5A Other voltages are available as an option. Option Protection Overcurrent (50/51), Directional ground fault (67G), Ground fault (51G), Undervoltage (27), Overvoltage (59), Control CB control / Lock out / Remote operation. Measurement A, V, W, Wh, Var, Varh. Communication Profibus, CC-link, CDL protocols are available. 3(s) Ground fault overvoltage (64) 05 MITSUBISHI HS-X MITSUBISHI HS-X 06

5 SAFE OPERATION & USER FRIENDLY Safe operation The surface of the solid insulation on the main busbars, voltage transformer, cable termination and gas vessel which is earthed, prevents electric shocks even when accidental contact occurs while the panel is energized. A-2 The CB mechanism provides simple operation from closed to opened condition by the use of a manual trip handle as described below. Earth shield (Carbon film) Busbar (Copper) Insulation material (Silicon rubber) V Open the cover Attach the adaptor Attach the extension shaft Apply the handle and pull down 0 d Earth screen busbar B. A three position switch ensures the and, are not operated at the same time. User friendly The mimic diagram provides easy understanding of the CB and conditions. Mitsubishi HS-X provides easy operation and prevents miss-operation by having a simple to understand and conveniently located (around eye level) operating mechanisms. / shutter operation selector operation mechanism with shutter operation mechanism with shutter condition indicator CB manual tripping mechanism with cover Manual closing button with cover Capacitor charged lamp condition indicator operation counter CB condition indicator Manual tripping button Capacitor discharging button By adopting a testing terminal on the provides the capability of performing cable withstand testing without removing the main power cables. ( Maximum applicable voltage: DC 20V 10min (SF6) ) The shutter operation key ensures that the are operated separately and also provides a locking function. The is operated in one simple action by using the operation handle Test terminal operation A. Circuit breaker A-1 HS-X adopts an advanced electro-magnetic operation mechanism and utilizes a capacitor to drive trip and close operation. For maintenance purposes, the discharging method is simply two steps as described below. 1 ) Turn off the control power (for trip / close). C. Installation of busbar & cable termination HS-X switchgear busbar are designed in a individual phase arrangement that prevents faults between phases. Since solid insulation busbars are used, no gas work is required during installation and commissioning. 2 ) Push the discharging button on the CB operation mechanism until the capacitor charged lamp turns off. Since the cable terminations are standard IEEE / DIN size, installation is very easy. Capacitor discharging Busbar arrangement 07 MITSUBISHI HS-X MITSUBISHI HS-X 08

6 HIGH RELIABILITY AND COMPA SIZE Dry air insulation In response to the increasing concern for the environment, Mitsubishi has designed the HS-X range of switchgear using dry air as the insulated medium instead of the conventional SF6. As demonstrated by the graph on the right, under compression, dry air has insulating characteristics that are more than sufficient to use as an insulated medium for medium voltage gas insulated switchgear. Global warming potential Insulation medium GWP Air 0 CO2 1 SF Breakdown voltage V / Vo (pu) kV mm SF6 36kV 100mm Needle Dry-air N2 Condition: Lightning impulse voltage 1.2 / 50 s Pressure (MPa) Insulation characteristics of compressed air (Vo : Breakdown voltage of air at 0.0Mpa) 700 Mitsubishi long life grease 7000 PREVIOUS EXISTING MITSUBISHI GIS A specially developed long life grease is applied to the moving parts of the operating mechanism of the Disconnecting / Earthing switch ( ). This Mitsubishi grease has been thoroughly tested to guarantee smooth lubrication for over 15 years without the need for reapplication, as demonstrated by the test data results graphed below. The required maintenance time required is reduced dramatically MAINTENANCE SPACE 2 MAINTENANCE SPACE 2 FRONT HS-X FRONT 2 Maintenance space required is recommendation only. Oxidation stability test - Oxidation of grease is the main deterioration factor. As the graph above demonstrates Mitsubishi grease show very little oxidation (the pressure of oxygen remains unchanged throughout the test). IR spectrum of Mitsubishi grease - The IR spectrums of Mitsubishi grease before and after the oxidation stability test are nearly identical, proving the grease characteristics remain the same even after many years after it has been put into use Compact size The compact size of the switchgear is achieved by the use of suitably positioned insulating barriers within the sealed gas vessel. The graph on the right demonstrates that the breakdown voltage can be increased to more than double (or conversely the insulation clearance distance can be decreased to less than half) of that when no barriers are used. HS-X requires 46% less 1 installation space when compared to its previous model. This allows for it to be installed in many locations where space is limited. 1 Based on 10 panel arrangement. Breakdown voltage V / Vo (pu) HS-X range Condition: Lightning impulse voltage 1.2 / 50 s Insulation characteristics of air with insulating barrier A Barrier position Barrier B a d Needle A : 100mm B : 300mm 300mm t=3mm d : 100mm Pressure of oxygen MPa Lithium soap-based grease Temperature : 150 Mass of grease : 72g Heating time hr Equivalent period under room temperature (Years) Oxidation stability test Mitsubishi grease Fluoride-based grease Bentonite-based grease Transmittance % Coefficient of friction Before oxidation stability test After oxidation stability test Wave numbers cm -1 IR spectrum of Mitsubishi grease Lithium soap-based grease Mitsubishi grease Temperature Coefficient of friction under low and high temperatures (Vo : Breakdown voltage without barrier) Coefficient of friction - The coefficient of friction of Mitsubishi grease remains consistently low, both under low and high temperature conditions. 09 MITSUBISHI HS-X MITSUBISHI HS-X 10

7 SWITCHGEAR ARRANGEMENT Typical single line diagram Typical key single line & section view Incoming panel Outgoing panel Bus section panel Bus VT / LA panel TR TR Typical key single line / / / RL RL Section view LA EVT 12 / 24kV Width (mm) Depth (mm) Height (mm) Weight (kg) Calorie (J/S) Note Calorie values indicated are for 630A. For outdoor panels the depth and height are increased by 0mm and 350mm respectively. Other section view (flexible design) Cable entry from top (Indoor type only) Incoming panel with VT / LA Incoming panel with bus VT (Indoor type only) Incoming panel from bus duct Bus VT / LA panel with Bus Panel layout of above single line diagram Typical key single line / / / / Section view LA LA EVT EVT E. 12 / 24kV Note Width (mm) Depth (mm) Height (mm) Weight (kg) Calorie (J/S) Calorie values indicated are for 630A. For outdoor panels the depth and height are increased by 0mm and 350mm respectively. Other type configration please contact MITSUBISHI ELERIC MITSUBISHI HS-X 1 For these specification please contact MITSUBISHI ELERIC. MITSUBISHI HS-X 12

8 FOUNDATION DRAWING STANDARD ACCSORI Front side space for maintenance (1300) 290 (440) (90) 100 (0) (90) Rear space (75) LV compartment key Test plug 400 FRONT 50 (75) 400 Hole for control cable 700 Hole for main circuit cable and earthing cable Side space Foundation bolt hole size 20 1 In case of top or rear cable entry, panel depth is requited 1300mm. ( ) means size of outdoor use. STANDARD & OPTIONAL SPECIFICATIONS Shutter operation key Panel Panel thickness Gas vessel Insulation medium Degree of protection Painting Panel wiring Cable Auxiliary equipment Multi-function relay Test terminal Item Installation location Enclosure (not including gas vessel) Annual gas leakage rate Low voltage compartment Bus bar chamber Gas Vessel Operating mechanism compartment Cable chamber Partitions between compartments All surfaces except operating mechanism compartment Operating mechanism compartment Type General control circuit Size VT, secondary circuits Color General Color VT and secondary circuits Grounding Main circuit cable entry Main circuit cable terminal Main circuit cable gland Control cable entry Space heater Terminal block for control circuits Name plates Operation At terminal specification Indoor More than 2.0 mm Less than 0.5% weight per year SF6 IP65 Munsell 5Y7/1 Munsell 5PB3.5/5 V PVC insulated 1. mm 2 or more 2.0 mm 2 Yellow Yellow Green Front bottom Not supplied Not supplied Front bottom Not supplied Screw type Acrylic plate MP + Wide range Manual Not supplied Optional specification Outdoor - - Dry air IP51 IP51 - IP51 IP51 IP4X Specified type Specified size Specified size Rear top or bottom Specified type, size & specification Specified type, size & specification Front top Specified type & specification Specified type Laminated plates or stainless steel Specified type Motor Supplied CB manual trip handle operation handle Gas adapter 13 MITSUBISHI HS-X MITSUBISHI HS-X 14

9 Please address inquiries for further information to: Mitsubishi Denki Building 2-2-3, Marunouchi, Chiyoda-ku, Tokyo , Japan From November 7, 2005: Tokyo Building 2-7-3, Marunouchi, Chiyoda-ku, Tokyo , Japan Safety Precautions Please read the instruction manual before using the device. A C6718-D HQ0903 Printed in Japan (MDOC) Revised Publication, effective Mar Superseding Publication, A C6718-C of Sep Specifications subject to change without notice.