KYN-35 metal clad withdrawable switchgear
Medium voltage switching equipment is mainly used in power plants, substations and large and medium-sized industrial and mining enterprises in the substation, as the power system control, protection of high voltage
Distribution device。
Since the sixty's, with the rapid development of power industry, domestic and foreign demand for medium voltage switchgear increased sharply. In particular, due to the general use of the central control technology, sports technology and computer, the need for the transformation of the city network technology, the high voltage complete sets of power distribution equipment, insulation level, security,
Reliability and convenient maintenance and so on put forward higher requirements.
So far, China's production of 35kV level of medium voltage switchgear were CB3906H home standard box type or interval type structure, metal clad switchgear is still blank. To this end, our company after more than two years of practice, all types of test items by the same high voltage electrical quality supervision and testing center, and the Department of energy electrical equipment quality testing center has not been tested, all successfully passed. All but meet the requirements of the GB113906 national standard and the IEC-298 international standard.
Main technical parameters
1 rated voltage (KV) 35
2 maximum voltage (KV) 495
3 rated current (A) 1600
4 rated insulation level
A rated short time T frequency withstand voltage (KV) 95
H rated lightning impulse withstand voltage (KV) 185
5 rated breaking current (KA) 1625
6 rated short-circuit current (KA) 4063
74 second thermal stable current (KA) 1625
8 dimensions (width + depth 4 high) (mm) 1200 (1400) x2200 * 2500
1 main switch LN2-35 rotary arc type SF circuit breaker has the international advanced level in the late eighty's, which has the advantages of high current interruption and maintenance interval.
Long, fully enclosed insulation. ZN-35 vacuum circuit breaker is particularly suitable for frequent operation of the site use.
2 cabinets equipped with other high-voltage electrical components are the domestic development of the new products, so as to greatly reduce the volume of the switch did not create the conditions. Its volume ratio is 229.4MVA/m3.
3 main busbar is Phi 70 sulfide coating insulation bus to plant distribution and insulation; in line and the cabinet body between clapboard with epoxy resin casting insulation casing; contact box and a current mutual inductor together as one; insulated bus phase air clearance >220mm, insulation creepage distance >13.6mm/ kV and insulation level than the GB3906 with standards and IEC-298 requirements with international standards.
4 switch cabinet interlocking to meet the energy department "five defense" requirements;
The 5 hand vehicle is provided with a work, a test and a removal of three positions, and the position and the two contact are additionally provided with mechanical interlocking. The truck is not horizontal movable bolt positioning device.
6 handcart with light and flexible worm push and pull mechanism and a guide positioning device, so as to ensure similar hand car has good interchangeability; succeed in a dynamic and static isolation, with two pieces of aluminum sheet metal isolation valve, driven by the scissors type lever mechanism. Its characteristic is moving away from large, labor-saving, ensure the safety of Yu xiu.
7 short circuit grounding switch has 63KA close ability, which can prevent the misoperation of R Cho equipment and personal suffering.