Double Break Three Columns High-voltage Dis-Connector
Model No:GW7-145
1. Overview
1.1 GW7-145D(W)
High-voltage Dis-connector(Hereinafter referred to as the disconncetor),it switch under the 145kV, 60Hz high voltage lines in the no-load current, and maintenance of high-voltage lines are and other electrical equipment with live electrical lines for three-pole high-voltage electrical isolation. Which part is called earth switch, and the rest said the main switch.
The disconnector moving contacts for complex rotary motion, the existing GW7 series disconnector, principles and structure of the work had significant improved.
1.2 The disconnector operate with CJ─3 for the three-phase linkage.For single grounding type disconnector, main link and ground link interlocked through
interlocking board. For the doubled grounding type disconnector, it should be work in with CS9 manual mechanism.
1.3 Ground link and main link have mechanical interlock device, manual mechanism also can increase electromagnetic lock to prevent misuse.
1.4 the disconnector satisfy the following standard:
1.4.1 IEC 62271-102/IEC 60265/ANSI C37.32
1.4.2 GB1985/GB311.1/GB311.2~6 /GB/T11022/GB/T13384/GB3309
2. Technical data and operating conditions table 1
| |
Items |
Parameter |
Unit |
Remarks |
| 1 |
Rated voltage |
138 |
KV |
|
| 2 |
Rated frequency |
60 |
Hz |
|
| 3 |
Rated Current |
1250 |
2500 |
3150 |
A |
|
| 4 |
Rated peak withstand current |
100 |
125 |
kA |
|
| 5 |
Rated short time withstand current |
40 |
50 |
kA |
|
| 6 |
Rated short-time withstand current duration |
4 |
S |
earth switch 3S |
| 7 |
Frequency withstand voltage (RMS) |
Earth, Alternate |
275 |
kV |
|
| Fracture |
325 |
| 8 |
Lightning impulse withstand voltage (peak 1.2 / 50μs) |
Earth, Alternate |
650 |
kV |
|
| Fracture |
750 |
| 9 |
Mechanical life |
10000 |
Frequency |
earth switch 1000TIMES |
| 10 |
Environment and conditions |
Altitude |
1000(2000)(3000) |
m |
|
| wind pressure |
700 |
Pa |
|
| seismic intensity |
8 |
degree |
|
| Ice thickness |
10 |
mm |
|
| environment temperature |
-40 to 40 |
ºC |
|
| 11 |
Rated static terminal Rally |
endwise |
1500 |
N |
|
| cross |
1000 |
|
| vertical |
1250 |
|
| 12 |
creepage distance |
Antifouling 3 level |
3450 |
mm |
|
| Antifouling 4level |
4350 |
mm |
|
| 13 |
Motor Drive Parameters |
Opening time |
7/12±1 |
S |
|
| Closing time |
7/12±1 |
S |
|
| Motor power |
550 |
W |
|
| Control Power |
AC125/220 |
V |
|
| DC125/220 |
|
| Motor Power |
AC125 |
V |
|
| Auxiliary contacts |
According to the contract |
|
|
| Output angle |
180 |
degree |
|
| 14 |
Manual mechanism Parameters |
Auxiliary contacts |
According to the contract |
|
|
| Output angle |
90 |
degree |
|
| 15 |
Disconnector main circuit resistance |
≤130 |
μΩ |
Both ends of the connection plates |
| 16 |
Earth switch loop resistance |
≤250 |
μΩ |
Soft coupled to ground static contact |
| 17 |
Insulation distance after disconnector open |
≥2 |
m |
|
| 18 |
Insulation distance after earth switch open |
≥1.8 |
m |
|
| 19 |
Disconnector three-pole closing period |
≤20 |
mm |
|
| 20 |
Earth switch three-pole closing period |
≤15 |
mm |
|
| 21 |
Final pressure of disconnector' contact |
≥120 |
N |
|
| |
|
|
|
|
|
|
|
|
3. Structure and working principle
3.1 GW7 dis-connector is three-column double fracture,The level of division and three-pole linkage type,also can use uni-polar,it consist of main switch .earth switch and actuator. Main switch consist of brace,
porcelain insulators and conductive portions.
3.2 motor process of dis-connector is a compound composed of two parts made of rotational motion,That horizontal rotation and vertical rotary motion. Dis-connector contact system is complex rotary(See Figure A). At both ends of the base frame 1 is provided with the support porcelain insulators 3,At its upper end with the stationary contact base 12,in the middle of the base has a driven shaft,The shaft is fixedly connected with the rotary flange 2,
An operating porcelain insulators 4 on a rotating flange. Motor drive rotate flange and operating porcelain insulators,by positioning the trip mechanism and fork mechanism drives the movable contact rod holder 7 and moving contacts 6,synchronously rotating it from the OFF position to the closed position.In the closing position, driven by a horizontal rod 8 9 realize swing block commutation trip, movable contact rod holder 7 does not make the rotation, driven fork lever 15 about its own axis conductive rod 6 flipped so that the conductive bars on the movable contact 6 head and static contact completely closing.
3.3 A mechanical interlock between the main switch and earth switch. For interlock between the front and rear breaker, electromagnetic locks can be installed outdoors. For no grounding and grounding with CJ -3 single type operating mechanism for double ground was equipped CS9-G manual mechanism.
3.4 Structure and working principle of earth switch
Earth switch(see the right picture),the movement is by CJ -3 institutions operating lever to earth switch through a link after the conversion, driving a four-link active grounding arm rotation, due to the active arm and door type bracket and earthing pipe is composed according to the design requirements special four-link system, thus ensuring the earth switch in the closing process, the first rotary motion, near the closing position, linear motion upward, insert static inner contact, opening and vice versa.
4 Installation and Test
Before installation, according to the packing list before unpacking inventory of spare parts, under the premise of complete components before installation, if found oxide layer in the surface need to use sandpaper or steel brush to remove, wipe with a cloth coated with oil and then quickly installation can be carried out after the temperature grease.
4.1 Installation and commissioning of each phase dis-connector
4.1.1 It is shown in Figure, the base 1 is mounted with bolts on the basis of the installation should pay attention to put the pads. And the base plate should be placed with a relative. Then check with the spirit level on the base plane is level, if not the level of the need to add shimming between the base and foundation.
4.1.2 The three porcelain insulators are lifting in the end under the seat, secured with bolts. On the ground, and the two stationary contacts, respectively, with the upper porcelain insulator bolt preloaded together. And integral lifts on both ends of the base, note the direction of the two seats facing opposite stationary contact.
4.1.3 The movable contact lever member 6 and a porcelain insulator pre-install together with bolts, the integral lifting to the middle of the rotation on the base flange. Fork lever 15 is biased in the operating side of 4 porcelain, from the outside you can see a bolt head. Both ends of the stationary contact each seat fitted with a nylon hook plate, a static contact Ann seat thereon, and the other is mounted below it.
4.1.4 The requirements of grounding products, according to the position shown static contact with the ground bolt, fixed to the main switch static contact base, then place the knife moving contacts loaded clamping inner coupling, adjust the depth of insertion tubes, and the earth switch smooth closing.
4.1.5 The main switch move to the position where just close, check that:
a: the ends of movable contact rod should be simultaneously exposed to static finger;
b: moving contacts of the upper and lower stationary contact centers should refer to the same height in the center row;
c: nylon hook board should not prevent the movable contact rod smoothly fit into the seat within the stationary contact
4.1.6 The main switch moves to the closing position, check that:
a: movable contact rod ends of the edge of the gap and static contact base should be the same (as shown enlarged in a four-I at the size);
b: nylon hook board should be effective hooked silver-plated movable contact plate;
c: Application feeler on the finger of each exposure.
4.2 When the three-phase disconncetor coupling and debug connection, all rotating parts are coated 2 # low temperature grease.
4.2.1 Installation and commissioning operating drive
4.2.1.1 After the installation phase main switch and put the main switch in the closing position, then CJ -3 operating mechanism, according to the position shown in Figure installed base in the three-pole on. Note that when you install, try to keep the institution main knife switch is coupled with the output shaft axis of the straight part of a grounding switch, the agency should maintain its operating shaft is coupled to the axis of the knife on the straight. To the horizontal in a vertical position.
4.2.1.2 connect switch and drive by coupling (Figure 2 Item 4), contact (Figure 2 Item 3)and welded steel pipe.
4.2.1.3 Adjusting the start of closing position:
Through that adjust the rotation angle of the coupling to solve. First CJ -3 agency shake to the closing position with the handle clockwise, then reverse direction after tightening the coupling nut roll on 6-8 laps, and then use the handle shake CJ -3 agency to carry out a closing operate and observe the action switch position adjustment in the event of the case as follows: Main switch opening is not in place, or opening and closing the interference is not in place, indicating that the initial angle of the initial angle of the main body does not match the switch should loosen the coupling nut on the adjustment in place after tightening.
4.2.2. Put each pole main switch into the closing position, and then install a three-phase link I provided, if the initial angular misalignment, can be adjusted three-pole linkage drawbar length by rotating the screw .
4.2.3 The main switch in the middle position, whether it touches a button or closing button opening main switch to observe the direction of motion as expected, if not, immediately turn off the power, and swap any two of the three-phase power supply phase.
4.2.4 Three-phase earth switch connection and commissioning.
4.2.4.1 According to the method of couple main switch and switch , will be operating on a joint mechanism to link up with the switch.
4.2.4.2 The three-phase installation link that we provided, if the initial angular misalignment, can be adjust by turning the screw tripolar linkage drawbar length.
5 Operation, maintenance and repair
5.1 Inspection when used
5.1.1 Visual inspection of the main switch closing position should be set in a straight line.
5.1.2 Main switch fracture distance is not less than 2600MM , earth switch fracture distance is not less than 2100MM.
5.1.3 Check the main switch three-pole on the same period of not more than 20 mm, the measurement method: When either one pole piece both sides of the movable contact means contact with the stationary contact when measured in addition poles moving away from static contact between L1, L2 . And 1/2 (L1 + L2) ≤20MM.
5.1.4 Check the three-pole of earth switch on the same period of not more than 15 mm, inspection methods, when either extremely dynamic and static contact fourth year when measured in addition poles move from static contact is not more than 15 mm.
5.1.5 After earth switch closes, head should be in place to insert static contact depth.
5.1.6 Connect the power supply, the electric mechanism is applied respectively, 85%, 100%, 110% of rated voltage, and three points respectively, closing operation, points, closing the position should be correct.
5.1.7 when Operate earth switch by motor drive, the force acting on the handle is not more than 200N.
5.1.8 The total loop resistance electric drop test disconnector and earth switches meets the technical parameters specified items, since this type disconnector is a double fracture, should measure the contact resistance with two poles, and its value should be less than 20%.
5.1.9 Check that the disconnector and earth switche can achieve reliable mechanical linkage, and electromagnetic lock action is reliable.
5.1.10 Check all parts of the axle pin and there is relative motion is coated with grease, if the bolts tightened.
5.1.11 Check the disconnector'surface plate (coating)which damage or loss.
5.2 Maintenance and repair
Main switch , due to the moving parts are mounted in the middle of the conductive pipe inside the casing, seal better, it is generally two to three years before they need maintenance, but one should be under heavy filthy environments timely maintenance. Connecting rod shaft pin is directly exposed to the air, therefore, should pay attention to regular temperature grease coated # 2.
Maintenance should note the following:
Remove the parts in the process, pay attention to the mutual position of the recording between the various components, standard specifications in order to avoid errors when re-loading complex.
After repaired and refitted, the bottom shelf of all moving parts should be coated with a relatively low temperature grease # 2, all aluminum conductive surface in contact with aluminum, due to oxidation fast, it should be coated with a layer of Vaseline, use sandpaper or steel brush Press grid mode rubs (removing the oxide layer) with a cloth to wipe off the oil, immediately re-coated with a thin layer 2 # low temperature grease, before assembly.
Maintenance projects include: insulators decontamination; mechanical rotating joint inspection; contact contacting health checks, etc.
6 Technical parameters and the use of electromagnetic locks
CS9-G (F) Manual operating mechanism operating angle of the disconnector is 90 degrees, and it can be attached DSW Outdoor electromagnetic locks, to achieve main switch, earth switch and circuit breakers between the three connection, thereby preventing the occurrence of an electrical malfunction of the accident.
6.1 Technology parameters of Electromagnetic lock in Table 2:
| Electromagnetic lock |
AC |
DC |
| Rated voltage(V) |
220/125 |
200 |
125 |
| Rated current(A) |
0.3/0.5 |
0.25~0.35 |
6.2 The use of electromagnetic locks
When the main control circuit the signal is given, the operator depresses the electromagnetic lock with the index finger of the operating lever, the auxiliary contact in the lock is turned on, while the upper end of the operating lever is pulled back to the thumb plate, that can pull the lock bolt, to unlock, then the operator to rotate with the other hand grounding switch manually agency handles, electromagnetic lock bolt is inserted into the card automatically block to block within the lock plate notch on the spindle, so that agencies cannot continue or the handle back and forth action, so that it controls points or co-location of the grounding switch, to avoid the purpose of the interlock to prevent misuse.
In order to deal with emergency situations, in front of electromagnetic locks, there is an emergency unlocking hole, when in the event of loss of power still open electromagnetic lock bolt, simply by inserting a special key with 30 ° rotation within the keyhole, you can unlock by operating lever.
| Specifications of a three phase disconnector 22kV |
|
| Features |
Order |
| Quantity |
2 |
| Model/type |
GW |
| Manufacter |
HEMG |
| Origin |
CHINA |
| Installation |
outdoor, 1000 meters over sea level |
| Service condition |
temperature: 0-40 °C |
| relative humidity: 93% |
| Standards of manufacturing and testing |
IEC 62271-1/ANSI C.37 |
| Number of phases |
3 |
| Frequency |
60 Hz |
| Nominal voltage (phase-phase) |
22 kV |
| Max. Voltage |
24 kV |
| BIL |
50 kVrms (60Hz, 0 masl) |
| 125 kVp (1,2x50 µs) |
| Nominal current |
1200 A |
| Isc (3 seconds) |
20 kA |
| Isc (3 seconds) for ground blade |
20 kA |
| Minimum Creepage distance |
600 mm |
| Pole distance |
1200MM |
| Operated mechanism |
motor/manual |
| Auxiliary service |
Vac=127-220 Vac (3 phases) |
| Vdc=125 Vdc |
| Maximum Vdc (auxiliary service) |
140Vdc |
| Minimum Vdc (auxiliary service) |
70 Vdc |
| Open time (s) |
4 |
| Close time (s) |
4 |
| Driving force {Kg} |
500NM |
| Control motor box |
IP 44 |
| interlock coil |
| auxiliary switch (8 open/8close) - main blade |
| auxiliary switch (3 open/3 close) - ground blade |
| Electromechanical interlock |
yes |
| Installation position |
vertical |
| Ground blade |
yes |
| Maximum contacts temperature |
65 °C |
| Porcelaing color |
grey/dark brown |
| Control wiring |
600 V Cu |
| Temperature: 90°C |
| Color code (winding) |
|
| DC circuits |
BROWN/BLUE |
| AC circuits |
RED/YELLOW/GREEN |
| Maximun wind speed |
90 Km/h |
| Isc for relays and switch (protection) |
2A |
| Dielectric strenght AC and DC circuits |
2 kV (1 minute) |
| Spares |
a single phase disconnector |
| motor 125 Vdc |
| Accessories kit for open/close mechanism |
Audited Supplier 
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