Komprehensibong Ginagamit alang sa Struktura ug mga Katanguban sa Switchgear Cabinet
Ang switchgear gitawag isip usa ka fixed cabinet ug removable components (i.e., ang draw-out unit o "handcart"). Ang cabinet enclosure ug partition plates sa matang sa bawg functional unit gihimo gikan sa aluminum-zinc-coated steel sheets, precision-formed gamit ang CNC machinery ug assembled pinaagi sa bolts. Kini nagpahayag og dimensional consistency, high mechanical strength, ug excellent resistance to corrosion ug oxidation. Ang overall protection level sa switchgear enclosure mao ang IP4X; kung ang circuit breaker compartment door adunay bukas, ang protection level mao ang IP2X.
Ang cabinet nagsuporta sa overhead ug cable incoming lines, sama usab sa left ug right interconnections, naa kasagaran nga configuration options para sa distribution systems aron mapasabot ang diverse design requirements. Tanang installation, commissioning, ug maintenance operations mahimong maoperahan gikan sa front, naghatag og kalugaringon nga wall-mounted installation o back-to-back arrangements—optimizing space utilization ug pagbawas sa overall project costs.
Cabinet Structure
Ang switchgear cabinet gisulay sa upat ka independently assembled ug interconnected sections: ang front cabinet, rear cabinet, instrument chamber, ug pressure relief system. Kini nga mga sections gipakig-uliha isip usa ka cohesive unit. Ang switchgear gipartition sa handcart compartment, busbar compartment, cable compartment, ug relay/instrument compartment, bawg grounded independently uban sa inter-compartment protection level sa IP2X. Bisan pa dili ang relay/instrument compartment, tanang compartments gipakig-uliha sa dedicated pressure relief channels.
Ang cable compartment centrally ug elevatedly designed, naghatag og multiple cable terminations ug simplifying on-site installation. Ang cabinet doors electrostatically sprayed, naghatag og durability, impact resistance, corrosion resistance, ug aesthetically pleasing finish (uban sa color customizable per user requirements).
A. Handcart Compartment
Ang handcart compartment fitted sa precision guide rails nga naghatag og smooth sliding ug operation sa circuit breaker handcart. An automatic shutter mechanism installed sa front sa static contacts, nagpadako sa operator ug maintenance personnel safety pinaagi sa prevention sa accidental contact sa live parts kung ang handcart withdrawn.
B. Busbar Compartment
Kini nga compartment houses ang main busbars. Tulo ka openings sa left side wall accommodate busbar insulation sleeves, nga electrically isolate adjacent devices ug help contain faults, preventing escalation.
C. Cable Compartment
Ang cable compartment accommodates current transformers, grounding switches, surge arresters, ug power cables. A slotted non-metallic o non-magnetic metallic sealing plate mahimong ipasabot sa bottom, facilitating on-site cable routing ug installation.
D. Instrument Chamber
Ang instrument chamber houses relays, meters, signal indicators, control switches, ug other secondary devices. An optional small busbar compartment mahimong idugang sa top upon user request, capable of accommodating up to fifteen control busbars.
E. Pressure Relief System
Pressure relief devices installed sa taas sa handcart, busbar, ug cable compartments. Sa event sa internal arc fault sa circuit breaker, busbar, o cable compartment, ang internal pressure rises rapidly. Kung ang critical pressure threshold reached, ang pressure relief panel sa taas automatically opens, safely venting hot gases ug pressure outward aron protektahan ang personnel ug surrounding equipment.
Circuit Breaker Handcart
Ang VD4 vacuum circuit breaker handcart, manufactured by ABB, represents a leading international standard in performance ug reliability. Ang VS1 vacuum circuit breaker handcart, developed ug produced by Sanyuan, is the most advanced domestic equivalent. Both types feature a centralized draw-out design, enabling easy operation, visual inspection, handcart insertion/removal, ug maintenance. The handcart design ensures interchangeability among units of the same specification. Movement within the switchgear driven by a screw mechanism, ensuring smooth, reliable, ug effortless insertion ug withdrawal of the circuit breaker.
Interlocking System for Misoperation Prevention
Ang switchgear equipped sa robust ug reliable interlocking system nga fully complies sa "Five Prevention" requirements, ensuring safe ug error-free operation.
