Equipmentintroduction:
KYN28A armored removable AC metal switchgear is a complete set of power distribution devices for 3.6-12V three-phase AC 50Hz single bus and single-wire segmented system,which is mainly used for power transmissionin power plants,small and medium-sized generators, power distribution of industrial and mining enterprises and institutions,and secondary substations ofpower systems, power transmission and large high-voltage motor starting, etc., for control,protection and testing.lt has the "five prevention"interlocking functions of preventing the load push-pull circuit breaker handcart, preventing the circuit breaker from opening and closing, preventing the grounding switch from closing the circuit breaker when it is in the closed position, preventing it from entering the live isolation by mistake,and preventing the grounding switch from being misconnected when it is live, and it is a power distribution device with superior performance.
Structural features:
The switchgear is designed according to the armored metal-enclosed switchgear in lEC62271 series standards.
The whole is composed of two parts: the cabinet and the central extractable parts (i.e. the handcart). The cabinet is dividedinto fourseparate compartments.
The enclosure protection level is lP4X, and the protection level of the circuit breaker room door between the chambers is lP2X when opened, and it has a common functional scheme for overhead outgoing wires and cable entry and exit, and can become a power distribution device in the form of various schemes after arrangement and combination, The switchgear can be installed, debugged and maintained from the front, so it can be installed against the back to form a double row and against the wall, which improves the safety and fexibility of the switchgear.
| Name | Model Parameters |
| Model | KYN28-12/1250-31.5 |
| Rated voltage KV | 12 |
| Rated current A | 1250 |
| Rated frequency Hz | 50 |
| Rated short-circuit interrupting current KA | 31.5 |
| Rated short-circuit closing current KA peak | 80 |
| Rated short-time withstand current duration S | 4 |
| Rated short-time withstand current KA | 31.5 |
| Rated peak withstand current KA peak | 80 |
| Rated short-time power frequency withstand voltage KV | 42 |
| Rated short-time power frequency withstand voltage (fracture)KV | 48 |
| Ratedlightningimpulse withstand voltage kV | 75 |
| Ratedlightningimpulse withstand voltage kV peak | 85 |
| Closing operating voltage V(highest/rated/lowest) | DC2421220/187 |
| Opening operating voltageV(highest/rated/minimum) | DC2421220/143 |
| Enclosure degree | IP4X(P2X for circuit breaker chamberdoor opening or partition time) |
| Dimension mm(W*D*H) | (800-1100)*(1000-1200)*(2200-2650) |