KYN28-12 Medium Voltage Metal-Clad switchgear

The KNY28-12 Armoured Removable AC Metal-Enclosed Switchgear is an indoor medium-voltage switchgear designed for 3–12kV, three-phase AC 50Hz power systems. It is used for power distribution, control, protection, and monitoring in substations, industrial facilities, and power networks. Featuring advanced relay protection and intelligent control functions, it supports remote monitoring and communication. Equipped with a reliable “Five Prevention” interlocking system, the switchgear ensures high operational safety. It is compatible with VSI (ZN63), ZN12V, VD4 vacuum circuit breakers, and VC series vacuum contactors.

1.Ambient air temperature:upper limit+lower limit of 40 ℃in general area-10℃;

2.Elevation:1000m;

3.Temperature:

Relative humidity:daily average is not more than 95%,monthly average is not more than 90%;water vapor pres-sure:daily average is not more than 2.2 kpa,monthly average is not more than 1.8 kpa;

When the temperature drops sharply,condensation may occur,accompanied by pollution.This product is suitable for the following two more severe environmental conditions:

(1)The condensation is infrequent (no more than twice a month on average)and slightly polluted;

(2)Generally no condensation occurs (no more than twice a year on average)and serious pollution occurs.

4.No fire,explosion danger or serious pollution,such as gases that corrode metals and destroy insulation,etc.

5.There is no place with violent vibration,turbulence and vertical inclination not exceeding 80.

Note:(1)Storage and transportation are allowed at-30 degree C.

（2）When the altitude exceeds 1000m,it should be treated according to JB/2102 Technical Requirements for High Voltage Electrical Appliances in Elevation Areas”.When the altitude does not exceed 2000m,no measures need tobe taken for low voltage auxliary equipment.