Describe

Kyn28-24 metal armored high voltage AC enclosed switchgear (hereinafter referred to as switchgear) is a new product designed and developed by absorbing domestic and foreign advanced manufacturing technology on the basis of inheriting kyn28-12 switchgear.

Kyn28-24 switchgear is especially suitable for incoming line, feeding and control of 24kV distribution system. Medium voltage products are widely used in large power distribution plants and enterprises.

Product model and meaning

Service conditions

1. Normal use conditions

1.1 temperature: the ambient air temperature is - 15 ~ + 40 ℃; And the average temperature within 24h shall not exceed 35 ℃;

1.2 humidity: the daily average humidity shall not exceed 95% (the daily average steam pressure shall not exceed 2.2kpa);

The monthly average humidity shall not exceed 90% (the monthly average steam pressure shall not exceed 1.8kpa).

1.3 altitude: no more than 1000m.

1.4 environment: indoor environment free from dust, smoke, corrosive or combustible gas, steam or salt fog pollution.

2. Abnormal use conditions

2.1 any use condition that does not meet any of the clauses in 2.1 is regarded as abnormal use condition

2.2 for any switch cabinet that is used under abnormal conditions, the user shall negotiate with the company before ordering.

Technical data

1. Rated voltage: 24kV;

2. Rated insulation level

Rated short-time power frequency withstand voltage (1min): 65kv (phase phase, phase ground);

79kv (fracture).

Rated lightning impulse withstand voltage (1.2 / 50 µ s): 125kV (phase phase, phase ground);

145kV (fracture).

3. Rated frequency: 50 / 60Hz;

4. Rated current: 630, 1250, 1600, 2000, 2500, 315oa;

5. Rated short-time withstand current: 16, 20, 25, 31.5, 40ka:

6. Rated short-time withstand time: 4S:

7. Rated peak withstand current: 40, 50, 63, 80, 100kA:

8. Protection grade:

Enclosure: IP4X;

Compartment: IP2X, which also meets this requirement when the circuit breaker room door is opened.

Main components

The main component of kyn28-24 switchgear is vs port-24 vacuum circuit breaker. The main electrical properties are shown in Table 2, and the mechanical characteristics are shown in Table 3

Table2

Table3