The product introduction:
KYN28-12(Z)(GZS1) type armored removable AC metal-enclosed switchgear rated voltage 3.6~12kV three-phase AC.
50Hz indoor power distribution unit.It is used for power transmission and distribution of power transmission, electric power system and industrial and mining enterprises.
It can also be used to frequently start high voltage motors and the like.
The switchgear can meet the requirements of GB3906, DL404, IEC-298 and other standards, and has the function of preventing malfunction of the circuit breaker.
Prevent the push and pull of the load, prevent the grounding switch from being energized, prevent the grounding switch from being powered at the grounding position, and prevent accidental entry.
"Five-proof" function such as charging interval.
Second, the use of environmental conditions:
Altitude: no more than 1000m;
Ambient temperature: upper limit +40 ° C, lower limit -10 ° C;
Relative humidity: the daily average is not more than 95%, and the monthly average is not more than 90%;
Saturated vapor pressure: the daily average value is not more than 2.2×10-3MPa, and the monthly average value is not more than 1.8×10-3 MPa;
Earthquake intensity: no more than 8 degrees;
No fire, explosion hazard, serious pollution, chemical corrosion and severe vibration.
The main features:
1) The structure of the cabinet is assembled by multiple bending of the aluminum-zinc plate;
2) All operations are carried out with the door closed;
3) High degree of protection to prevent intrusion of debris and insects;
4) Simple and effective "five-proof" blocking to prevent misuse;
5) It can be equipped with VS1 (ZN63A) or VD4 vacuum circuit breaker according to user requirements;
6) It is simple to replace the circuit breaker, and the hand truck is interchangeable;
7) Reliable wall installation of the cabinet, maintenance in front of the cabinet, and reduction of floor space;
8) The cable room has sufficient space to connect multiple cables;
9) Fast grounding switch for grounding and loop shorting;
10) The circuit breaker room, relay room and cable room can be installed with heaters according to user requirements to prevent condensation and corrosion;
11) The circuit breaker room and cable room can be separately installed with lighting devices according to user requirements to facilitate maintenance and overhaul.
The main technical parameters:
Main technical parameters of vacuum switchgear
Parameter nameunitparameterRated voltagekV3.6 7.2 12Rated currentA630 1250 1600 2000 2500 3150Rated frequencyH Z50Rated short-time withstand currentkA16 20 25 31.5 40Rated peak withstand currentkA40 50 63 80 100Rated power frequency withstand voltagekV42/1minRated lightning impulse withstand voltage (peak)kV75Rated short circuit durationS4Protection level IP4X
Main technical parameters of vacuum circuit breaker
Parameter nameunitparameterRated voltagekV12Rated currentA630 1250 1600 2000 2500 3150Rated short-circuit breaking currentkA25 31.5 40Rated short-time withstand currentkA25 31.5 40Rated short circuit closing currentkA63 80 100Rated short-duration power frequency withstand voltagekV42/1minRated lightning impulse withstand voltage (peak) kV75Rated short circuit durationS4Closing time (rated voltage)ms35 ≤ t ≤ 70Opening time (rated voltage)ms20 ≤ t ≤ 50Rated short circuit current breaking timesTimes50 (40kA is 30)Mechanical lifeTimes20000
Main technical parameters of the operating mechanism
Parameter nameunitparameterRated operating voltageOpening coilVDC220 / 110AC220 / 110Closing coilRated operating currentOpening coilA (DC/AC) 220/110V: 0.9/1.8Closing coil(DC/AC)220/110V: 1.0 / 2.0Energy storage motor powerW70Energy storage motor rated voltageVDC220/110 AC220/110Energy storage timeS≤ 15
Structure description:
The switchgear consists of a fixed cabinet and a removable part (handcart).The cabinet shell and the partitions of each functional unit are taken
It is bolted with aluminum-zinc plate.The enclosure of the switchgear has an protection rating of ip4x and the protection level of each compartment is IP2x.
The switchgear can be equipped with VS1 (ZN63A) or the VD4 vacuum circuit breaker handcart according to user requirements.Switchgear cabinets are generally
Single row arrangement is not installed against the wall.Since the installation, commissioning
and maintenance of the switchgear can be carried out on the front of the cabinet, it is possible to back-to-back groups.
Double or wall mounted.
Shell and partition:
The outer casing and the partition of the switchgear are made of aluminum-zinc-coated steel sheets which are processed by CNC machine tools and bent after being bent. Therefore,
The assembled switchgear can ensure the uniformity of the structural dimensions.
The aluminum-zinc-coated steel sheet has strong anti-corrosion and anti-oxidation effects.
And it has higher mechanical strength than the equivalent steel plate.The switchgear is divided into a handcart compartment, a busbar compartment, a cable compartment and a relay. In the table, each unit is grounded independently.
Handcart
According to their respective functions, they can be divided into an isolated handcart (referred to as gl car) and a voltage transformer handcart (referred to as PT car).
Current transformer hand truck (referred to as CT car), lower voltage transformer car (referred to as xpt car), metering handcar (referred to as JL car),
Isolation voltage transformer handcart (referred to as GL+PT car), fuse handcart (referred to as rdq car), lower-level lightning arrester handcart (referred to as xblq Car), grounded handcart (referred to as JD car) and nuclear phase handcart (referred to as HX car), with special propulsion mechanism, can achieve work, Exchange of test locations.And similar hand trucks, have a very high interchangeability.
Circuit breaker isolation room
A specific track is installed in the circuit breaker compartment for the hand truck to move.
When the circuit breaker moves between the test position and the working position.
The isolation valve is automatically opened or closed to ensure that the worker does not touch the live body. The handcart can be operated with the door closed.
Through the observation window, you can see where the handcart is in the cabinet and see any signs on the handcart.
Busbar small room
The main busbar is led from one switch cabinet to the other, and is fixed by the branch
small busbar and the static contact box, when passing through the side panel of the
Adjacent cabinet.
Secure with a busbar sleeve.All busbars are sealed with heat-shrinkable insulation tubes.
Cable isolation room
Ample cable compartments can be connected not only to multiple cables, but also to current transformers, earthing switches, lightning arresters, ETC.
Relay room
Relay indoor boards and panels can be equipped with secondary components such as control and protection components, metering, display instruments, and live monitoring indicators.
Interlocking device
1) The switchgear has a reliable interlocking device to ensure the safety of operators and equipment;
2) When the grounding switch is in the opening position, the handcart can move between the test position and the working position;
3) Only when the circuit breaker trolley is reliably positioned in the test position or working position;
4) When the handcart is in the working position, the secondary plug is locked and cannot be pulled out;
5) When the grounding switch is closed, the handcart cannot be moved from the test position to the working position;
6) The grounding switch can only be operated when the handcart is in the test position;
Interlocking of the secondary plug and the position of the handcart: the secondary plug can only be inserted or released when the handcart is in the test position;
When the handcart is in the working position, the secondary plug is locked due to mechanical interlocking and cannot be released.
Grounding device
In the cable room, there is a separate 4×40 mm2 grounding busbar that can penetrate the
adjacent cabinets and make good contact with the cabinet.
The size:
Height b2300mmWidth aBranch small busbar rated current 1250A and below, short circuit breaking current 31.5kA800mmBranch small busbar rated current 1600a or more1000mmDepth cCable entry and exit line1500mmOverhead access line1600mmWeight (kg)800~1200
The installation of the switchgear:
Foundation installation diagram
Cabinet width ACabinet depth bMNLL1L2L38001500 cable63080014505306308801660 overhead161010001500 cable8301000145073083010401660 overhead1610
Installation basic diagram
The main busbar of the switchgear adopts a rectangular busbar and is in the form of a disconnection. It must be adhered to a certain step during installation:
Install one cabinet and one cabinet, connect the busbar section with the corresponding small busbar, and insert the appropriate spacer when bolting.
Tighten with bolts.
Wipe the busbar with a clean, dry soft cloth, check the insulation tube for damage, and
apply conductive paste or neutral petroleum jelly to the joint.
1. Main busbar
2. Small busbar
3. Bolt
4. Pad
Connection type between busbar and busbar
