Overview
KYN28-24(Z) series alemating-current metal-clad and metal-enclosed with drawable swichgear (hereinafter referred to as "switchgear") is a complete set of power dstribution unit of three-phase single busbar and singlbusbar ebussection system of 20kV and AC50(60) Hz.This switchgear is mainly applicable to power plants, power transmitting of middle and small sized generators,distribution of industrial and mining enterprises, electricity receiving and tansmitting of secondary substations, as well as starting of large high-voltage motors, etc, realizes control protection and monitoring.It has"five preventions", it prevents on-load pushing or pulling circuit breaker's handcart, prevents making or breaking circuit breaker by mistake, prevents closing circuit breaker when the earthing swich is at closing position, prevents entering into live compartment by mistake, and prevents closing earthing switch under live condition. It can be equipped with the NV1-24 type vacuum circuit breaker developed by our company, it really is an ideal distribution equipment with perfect performances.It complies with the standards GB 3906. GB/T 11022 and IEC 60298.
Model and meaning
Use environmental conditions
◇ Ambient air temperature：-15℃ ~+40℃；
◇ Altitude：≤ 1000m；
◇ Relative humidity：daily ≤ 95%，monthly ≤ 90%；
◇ Seismic intensity：≤ Ms8；
◇ The isallation site should be free of fire，explosive danger，serious pollution，chemical corrosion or severe vibration；
◇ Nole：Plcase negotiate with us if your product is used beyond the range of above condition.
Product structure performance characteristics
1. Switchgear of 24kV with compact volume
Structure of this product is similar to that of mid-set swichgear of 12kV, the poduct is applicablel to systems of 20kV，not need composite isulation or interphase separator, with oustanding insulation performance.
2. Safe structure, fexible intallation
This switchgear is composed of cabinet body and mid-set withdrawable part(i.e. handcart) two parts. The cabinet body is divided into four separate compartments, degree of protection of the enclosure is IP4X, and the protection degrce is IP2X when compartment doors and circuit breaker chamber door are opened. It has overhead incoming and outgoing lines, cable incoming und outgoing lines and other function schemes, it can become power distribution unit of different schemes and forms after permutation and combination. This switchgear can be installed, debugged and maintained from the front side, so it can be arranged in duplex by means of back-to-back or arranged against the wall, which not only improves its safety and fexibility. but also reduces the floor space.
4. Various handearts, convenient operation
Framework of the handcart is made up of steel sheets through machining of CNC machine tool. The handcart has good insulation coordination with the cabinet body, with safe, reliable and flexibly mechanical interlocking. It can be divided into circuit breaker handcart, voltage transformer handcart and isolaing handcart according to the purposes, handcarts of the same specification are exchangeable absolutely.
There are breaking position, test position and working position in the cabinet body for handcard, each position has positioning device respectively that gurantees reliable interlocking, must carry out operation according to the interlocking anti-misoperation process.All handcarts adopt lead screw to rotate to push in or withdraw, it is convenient and fexible to operate, suitable for all kinds of operators on duty. When it is required to remove the handcart from the cabinet body, please use a special transfer car to take it out conveniently, then to carry out inspections and maintenance; it adopts mid-set type, has small volume, is convenient to check and maintain.
