Side-mounted circuit breakers are mainly used in air-insulated ring main cabinet circuit breaker program, used in conjunction with disconnect switches to constitute the transformer outgoing protection, also used in other air-insulated circuit breakers Switchgear, compact dimensions, due to the longitudinal arrangement, it can be ensured that in a very small width of the interphase and to the ground there is still sufficient electrical clearance; vertical up and down arrangement, good heat dissipation; conductive circuit is short, less heat; such as the KYN8-12-type armored Fixed metal-enclosed switchgear with excellent performance, suitable for 12KV and the following three-phase 50HZ power system, as the acceptance and distribution of electrical energy; mainly used in power plants, industrial and mining enterprises, power distribution and power systems in the substation of power transformation, power transmission and motor voltage control and protection, this product fills the blank of high-performance fixed high-voltage switchgear at home and abroad. The main features are as follows:

1. Large current, miniaturization, the main electrical components in the cabinet by the components with a combination of functions connected flexibly, eliminating all the branch busbars, making the 4000A rated current without fan cooling, the volume remains 840 (W) × 1400 (D) × 2450 (H);

2. Air insulation is safe and reliable;

3. extremely high short-circuit breaking capacity and short-circuit closing capacity, 61% of the DC component can still break the 50KA short-circuit current, closing the short-circuit current multiplier reaches 2.6, to fully meet the requirements of large generating units and small units of plant power export breaking requirements;

4. The cabinet body adopts the current popular aluminum zinc deposition plate at home and abroad by CNC processing. It is connected by bolts, which completely rejects the shortcomings of the old fixed cabinet welding in China. It can be installed on the wall reliably;

5. Simple and reliable interlocking, isolation switch operating force less than 120N, complete program.

The disadvantages are

1. inconvenient cable connection, because the switchgear cabinet is narrower and arranged in the depth direction, phase A/C needs to enter the cabinet from the back/front of the cabinet to connect the cables, and phase B is farther away from the front and back, which makes it difficult to be connected;

2. general air-insulated ring network cabinet are box-type, non-armored, that is, bus, cable connection, switch and other functional units are not metal partitions completely separate, according to the new standard loss of operational continuity level. Air-insulated ring main unit is generally LSC 2/2A level, the partition type is generally PI (non-metallic partition) level, rather than PM level;

3. each high-voltage compartment does not have an independent pressure relief channel, relative to the positively mounted withdrawable switchgear, the cable room, the trolley room, the busbar room has an independent pressure relief channel, the side-mounted switchgear is arranged vertically up and down, so the general common pressure relief channel is at the rear of the cabinet, or IAC AFL class, direct rear pressure relief.

4. The switch is arranged sideways, with a long operating axis, high operating force, possible influence on the switching speed and simultaneity between the furthest and nearest phases, and possible parameter changes for long-term use.

The side-mounted circuit breaker is equipped with current and voltage mutual inductors/sensors at the outlet side, which cooperate with the microcomputer protection unit on the circuit breaker to form a self-powered, self-releasing circuit breaker to realize the functions of phase-to-phase short circuit and single-phase ground fault short circuit, and the microcomputer protection to form the network automation, and the circuit breaker is also equipped with an outlet-side ground switch to form the outlet-side line maintenance grounding protection.

Equipped with rollers, it is easy to extract from the inside of the cabinet, which helps cable installation, and at the same time, it is convenient for maintenance and overhaul.

An advanced side-mounted draw-out circuit breaker is equipped with a longitudinal rotary three-position switch, realizing the integrated design of switching unit, integrated mechanism, integrated measurement and protection, integrated intelligent control, integrated interlocking, maintenance, and repair, to ensure the installation accuracy, to achieve consistency and miniaturization of the fit, a circuit breaker to achieve all the functions of the switchgear, the user does not have to worry about the insulation of the many primary parts such as copper rows and other insulation concerns, the mechanical interlocking between the different switches Users do not have to worry about the insulation of many primary parts such as copper rows, mechanical interlocking between different switches, and do not have to worry about the current and voltage transformers and secondary protection devices of different brands and protection coordination.