鸿浩电力设备有限公司

Summary

KYN28-24 armored movable AC metal enclosed switchgear (hereinafter referred to as switchgear) is applicable to indoor three-phase 50/60hz and rated voltage 24kV power system, which is mainly used in power plants, substations, industrial and mining enterprises and high-rise buildings, as receiving and distributing electric energy and controlling, protecting and monitoring the circuit. Kyn28-24 switchgear has various functions to prevent misoperation, including preventing the mobile handcart with load, preventing the closing position of the grounding switch from closing the breaker, preventing the live closing grounding switch and preventing the wrong entry into the live room. VS1 and vn2 series medium mounted high voltage AC vacuum circuit breakers and fixed sealed vacuum switches with excellent performance are equipped for the switchgear. The secondary circuit of switchgear is equipped with reliable control protection elements; the bus adopts the insulation means of heat shrinkable insulation material or epoxy coating to optimize the electrode shape, and the cabinet structure is compact. The switchgear is a power distribution equipment with stable performance, reasonable structure, convenient use and safe and reliable technology.

Model and its meaning

Normal service conditions

1. Environmental conditions: high temperature + 40 ℃, low temperature: - 15 ℃, and the average value measured within 24 hours does not exceed 35 ℃

2. The temperature conditions are as follows: the average value of daily relative humidity is not more than 95%; the average value of monthly relative humidity is not more than 90%;

The average value of daily water vapor pressure shall not exceed 2.2kpa; the average value of monthly water vapor pressure shall not exceed 1.8kpa, and the altitude shall not exceed 1000m

4. The ambient air is not obviously polluted by dust, smoke, corrosive and combustible gas, steam or salt spray

5. The vibration or ground motion from the outside of switchgear and control equipment can be ignored

6. The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kv.

Other service conditions

When it is used under the normal environmental conditions beyond GB / t11022, the company and the user can negotiate and reach an agreement on the operating conditions beyond the normal operating conditions.

In order to prevent condensation, the switchgear is equipped with heater, which should be put into use when the switch is not in standby state. The heater should also be put into operation during normal operation of switchgear.

Technical parameter

Main technical parameters of switchgear

Note: the depth of overhead incoming and outgoing cabinet is 2360mm.

Technical parameters of spring operating mechanism

Main technical parameters of VS1-24 and vn2-24 vacuum circuit breakers

Structure and working principle

KYN28-24 switchgear consists of cabinet body and removable parts commonly known as handcart). The cabinet body is divided into several functional compartments with metal partition, such as bus room, breaker room, cable room and relay instrument room.

The removable parts of the switchgear can be equipped with vacuum breaker handcart, voltage transformer handcart, arrester handcart, isolation handcart and fuse handcart, etc

Main structural features

The switchgear can be double arranged back to back or installed against the wall, which improves the safety and flexibility of the switchgear and reduces the floor area.

Cover

The external brightness of the switchgear is made of aluminum zinc coated steel plate, processed by CNC machine tool and made by multiple folding process. The whole cabinet has high precision and strong anti-corrosion and anti-oxidation performance, and because of the use of multiple folding process, the cabinet is lighter than other similar equipment, with high mechanical strength and beautiful appearance. The cabinet body adopts an assembled structure, which is connected by riveting nuts and high-strength bolts. It shortens the production cycle, makes the parts universal, occupies less space, and is easy to organize production.

The framework of handcart is made of thin steel plate and assembled by CNC machine tool. The handcart and cabinet have high matching precision, and the mechanical interlocking is safe, reliable and flexible. Handcarts are divided into circuit breaker handcarts, voltage transformer handcarts, metering handcarts, isolation handcarts, etc. according to different uses. Handcarts of the same specification can be freely interchanged. The handcart has the disconnection / test position and the working position in the cabinet, and each position has the positioning device to ensure the reliable interlocking. All kinds of handcarts are pushed and pushed by screw rod, which is easy and flexible to operate, and suitable for operators on duty. When the handcart needs to move away from the cabinet, it can be easily taken out with a special transfer truck for various inspection and maintenance.

When the handcart is transported into the cabinet circuit breaker room, it can be reliably locked in the off test position, and the cabinet position indicator light shows its position. Only after the handcart is locked, the screw rod pushing structure can be shaken to push the handcart to the working position. When the handcart reaches the working position, the operating force of the push handle suddenly increases and the handcart can't swing, and the corresponding position indicator light shows its position. The mechanical interlock of the handcart can reliably ensure that the circuit breaker can be closed only when the handcart is in the working position or test position, and the handcart can move only when the circuit breaker is in the open state