Main purpose

KYN61-40.5 AC metal armored removable switchgear (hereinafter referred to as switchgear) is a 40.5kV three-phase AC 50Hz complete set of power distribution equipment, which is mainly used for power distribution in power plants, substations and industrial and mining enterprises The room receives and distributes electric energy, and realizes the control, protection and monitoring of the circuit; in addition to being widely used in general power systems, it can also be used in places with frequent operations. The switchgear complies with GB3906-2006 "3.6kV-40.5kV AC metal-enclosed switchgear and control equipment", IEC62271-200-2003 "High voltage switchgear and control equipment Part 200: rated voltage above 1kV and below 52kV (including 52kV) Standard requirements for metal-enclosed AC switchgear and control equipment.

Use environmental conditions

a. Altitude: no more than 1000 meters;

b. Ambient temperature: upper limit +40~E lower limit -5℃;

c. Relative humidity: the daily average value is not more than 85% (at +25~C);

d. Earthquake intensity: no violent vibration, turbulence and vertical inclination; places exceeding 5 degrees;

e. Environmental conditions: places without explosion hazard.

Note: When the above normal use conditions are exceeded, the user can negotiate with the manufacturer to determine

Model and its meaning

 

 

Switchgear technical parameters

 

 

Main technical parameters of circuit breaker

 

 

Main parameters of circuit breaker cabinet primary isolation plug YCT-1600

 

 

Main technical parameters of JNH1-40.5

 

 

Main technical parameters of JDZX9-40.5Q and JDZ9-40.5 voltage transformers

 

 

Main technical parameters of LZZB7, 8, 9-40.5 type current transformer

 

 

LCZ-40.5 Current Transformer Technical Data

 

 

Main technical parameters of HY5W-51/134 arrester

 

 

Main technical parameters of fuse

 

 

Main technical parameters of one-piece spring operating mechanism

 

 

Main institutional features

1. According to its composition, the switchgear structure can be divided into two parts: cabinet body and handcart. The cabinet is equipped with a new fully insulated vacuum circuit breaker or an imported sulfur hexafluoride circuit breaker. The cabinet adopts an assembled structure, which improves the matching precision between the handcart and the cabinet. The product has a beautiful appearance, and can quickly organize production, assembly, and timely delivery. The cabinet body is bent from imported aluminum-zinc plate and assembled with bolts.

2. The typical scheme is divided into four parts according to the functional characteristics: relay instrument room, handcart room, cable room and busbar room. Each part is separated by a grounded metal partition, so it can prevent the arc from extending and prevent possible faults limited to a small area. Except for the relay instrument room, other compartments have independent pressure relief channels: when a certain part needs to be replaced or repaired, there is no need to cut off the power of the whole cabinet, just cut off the power at both ends of the component, and the maintenance personnel can safely enter the room. The protection level of the shell is IP3X or IP4X; the protection level is IP2X when the door of the handcart compartment is opened and the handcart compartment of the circuit breaker is in the amber breaking test position. (See Figure 1 for the structure and characteristics of the switchgear)

3. Closed door operation can be realized. All normal operations of the switchgear, including opening and closing of the circuit breaker, pushing the handcart of the circuit breaker to the working position and withdrawing to the disconnect/test position, and opening and closing of the grounding switch can all be carried out under the condition that the high-voltage compartment door is closed.

4. The switch cabinet has other primary schemes such as cable inlet and outlet lines, overhead inlet and outlet lines, bus connection, isolation, voltage transformers, lightning arresters and transformers used. The switch cabinet adopts composite insulation, and the material technology is completely based on domestic.

5. The main circuit adopts insulated busbars, and the interphase and connectors are equipped with insulating sleeves made of flame-retardant materials. The main busbars are split busbars, and adjacent cabinets are separated by busbar bushings, which can effectively prevent accidents from spreading , and at the same time play an auxiliary supporting role for the main busbar.

6. The front cable room is equipped with current transformers, grounding switches, etc., and the ample space is convenient for the connection of multiple cables.

7. Metal valves are installed in front of the contact box. The upper and lower valves are automatically opened when the handcart moves from the disconnection test position to the working position, and are automatically closed when the handcart moves in the opposite direction, forming an effective isolation.

8. The interlocking between the main switch, handcart, grounding switch and cabinet door adopts mandatory mechanical locking method, which meets the "five defenses" function. The grounding switch has a high closing capacity, which can avoid undue damage to the equipment due to misoperation. The voltage monitoring insulation wide and the grounding switch are combined into one body. The terminal display device is placed on the front of the switch cabinet and can emit light at 15% of the rated phase voltage, which has reliable personal safety measures.

9. Only when the circuit breaker handcart is in the disconnected/test position or working position, the circuit breaker can be closed, and after the circuit breaker is closed, the propulsion mechanism of the handcart cannot be operated to prevent load Push and pull circuit breaker handcart.

10. Only when the grounding switch is in the open state, the circuit breaker handcart can move from the disconnected/test position to the working position, and only when the circuit breaker handcart is in the disconnected/test position, the grounding switch can be moved Closing operation, so that the grounding switch can be prevented from being closed by mistake.

11. When the grounding switch is in the off state, the door of the cable room cannot be opened to prevent people from accidentally entering the electrified interval.

12. When the handcart of the circuit breaker is in the test or working position and there is no control voltage, it can only be opened manually but not closed (optional).

13. When the circuit breaker handcart is in the working position, the secondary plug is locked and cannot be removed.

14. The frame of the handcart is equipped with a screw nut propulsion mechanism and an overrunning clutch. The screw nut propulsion mechanism can be easily operated to move the handcart between the disconnected/test and working positions. With the help of the white lock of the screw nut, the handcart can be reliably locked at the working position to prevent the handcart from being damaged due to the action of electric power. Move and cause accidents. The overrunning clutch works when the handcart moves back to the working position, so that the operating shaft and the screw shaft are automatically separated and idling, which can prevent damage to the propulsion mechanism due to misoperation. Compared with similar foreign products, the switchgear has a larger composite insulation margin and better insulation stability.

 

 

Installation and debugging

1. Refer to Figure 2 for the installation basis of the switchgear (when the cable inlet and outlet are selected).

2. Dig a 200mm x 700mm trench on the foundation of the left side panel of the front cabinet to introduce the control power supply from the cable trench.

3. Push the handcart into the corresponding cabinet after the cabinet is installed. And when the switch cabinet is installed, it is necessary to remove the dust and debris in the cabinet first, wipe the bus bar with a clean and dry soft cloth, check whether the conductor insulation surface is defective, and apply conductive paste or Bloom petroleum jelly oil to the connection parts. .

4. Check whether all fastening bolts are loose and whether the wiring is reliable. Push and pull the handcart in the cabinet and perform opening and closing operations to observe whether there is any abnormality. Check whether the interlock is reliable, whether the secondary wiring and the setting value of the relay are correct.

5. When the handcart is in the working position, it should be ensured that the primary isolation dynamic and static contacts are in good contact. The contact depth of dynamic and static contacts should be greater than 25mm.

6. Adjust the opening and closing speeds and related parameters of the circuit breaker and its operating mechanism according to the requirements and debugging methods of the respective product manuals of the circuit breaker and its operating mechanism.

7. The circuit breaker can only be closed when the handcart of the circuit breaker is in the disconnected/test position or working position, and after the circuit breaker is closed, the propulsion mechanism of the handcart cannot be operated to prevent pushing and pulling with load Circuit breaker handcart.

8. Only when the grounding switch is in the open state, the circuit breaker handcart can move from the disconnected/test position to the working position, and only when the circuit breaker handcart is in the disconnected/test position, it can be grounded The switch can be closed, which prevents the electrified grounding switch from being closed by mistake.

9. When the grounding switch is in the off state, the door of the cable room cannot be opened to prevent people from accidentally entering the electrified interval.

10. When the handcart of the circuit breaker is in the test or working position and there is no control voltage, the instrument can open manually but not close (optional).

11. When the circuit breaker handcart is in the working position, the secondary plug is locked and cannot be removed.

Use and Maintenance

1. Before closing the cabinet and putting it into operation, carefully check whether the technical data marked on the nameplate is consistent with the technical data required for the operation of the power line:

2. Thoroughly remove the dust and foreign objects in the cabinet. For cracked or damaged insulations: replace them in time. Wipe the surface of the insulating parts with industrial alcohol or acetone:

3. All fastenings of the equipment: check carefully to eliminate loosening. Apply and lubricate the transmission and contact connection parts with industrial yellow wax.

4. After completing the above work, perform energy storage, closing and opening test operations on the circuit breaker. If it is normal, it can be energized and operated.

5. When the switchgear is in normal operation, the operating conditions should be recorded truthfully, and regular maintenance work should be done according to the requirements of the circuit breaker instruction manual. In case of condensation or partial discharge on the surface of insulating parts, overheating and discoloration of conductor joints or moving and static contacts, obvious high temperature in the cabinet, and strong abnormal smell, etc., the cause should be found out in time to eliminate it and notify the manufacturer. Collaborative processing.

Transportation and Storage

1. When the product is transported, loaded and unloaded, temporarily parked and installed, inversion, collision and severe vibration are not allowed.

2. When the product is not in use, it should be stored in a dry, well-ventilated room without corrosive gases.

3. After the product is unpacked, it should be checked against the product packing list to check whether the product spare parts and accompanying technical documents are complete and complete. Check whether the product is damaged during transportation and storage.

4. It is not allowed to disassemble electrical components and parts at will.

One time plan

 

 

 

 

Product structure and installation dimensions

 

 

 

Order Notes

The user must provide the following information when ordering:

1. Main wiring scheme number, single-line system diagram and arrangement diagram:

2. Secondary circuit wiring schematic diagram and terminal arrangement diagram;

3. The type, specification and quantity of electrical components in the switch cabinet;

4. When the switchgear is used under special conditions, it should be put forward at the time of delivery;

5. When accessories and spare parts are needed, the type and quantity should be proposed.