Ring Main Unit Guides
RMU Transformer Feeder: Switch-Fuse or Circuit Breaker?
Compare RMU transformer feeder protection using coordination studies, transformer data, trip requirements and maintenance access.
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Buyer Guides
Practical Selection Guides for Power Distribution Buyers
These articles support real procurement questions: how to choose the right transformer, substation, switchgear, RMU, or LV cabinet before asking for quotation.
Medium Voltage Switchgear Guides
Spare Switchgear Panel or Future Extension: What to Buy Now
Compare a fitted spare feeder, a prepared empty panel and reserved extension space with explicit compatibility and outage assumptions.
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Transformer Engineering
Specifying a Transformer for Large Motor Starting
Separate motor starting duty from running kVA and request a voltage-dip review using actual motor, source and transformer data.
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Medium Voltage Switchgear Guides
Switchgear Interlocking: Build a Reviewable Cause-and-Effect Schedule
Define local, remote and cross-panel permissives in a cause-and-effect schedule that links each interlock to evidence and acceptance tests.
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Medium Voltage Switchgear Guides
Switchgear Internal Arc Classification: What Buyers Must Specify
Read IAC accessibility, tested sides, current and duration correctly, then match the evidence to the proposed switchgear installation.
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Medium Voltage Switchgear Guides
Switchgear Retrofit: Check the Existing Cable Termination Interface
Compare cable reuse, retermination and replacement using verified cable data and the proposed switchgear connection geometry.
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Medium Voltage Switchgear Guides
Switchgear SCADA Signal List: Define Points Before Ordering a Gateway
Create a point schedule that connects field signals, command authority, data quality and control-centre acceptance responsibilities.
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Transformer Engineering
Transformer Neutral Earthing Information for an RFQ
Define neutral accessibility, bonding responsibility, earth-fault protection and source-changeover conditions in a transformer enquiry.
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Transformer Engineering
Transformer Parallel Operation: Procurement Checks
Build a parallel-operation review around voltage ratio, impedance, phase displacement, connections and switchboard fault duty.
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Transformer Engineering
Transformer Spare Parts and Handover Schedule
Specify traceable transformer spares, preservation, component references and handover documents before the equipment is shipped.
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Transformer Engineering
Writing a Transformer Technical Deviation Schedule
Compare transformer offers clause by clause with an explicit deviation register, evidence, affected interfaces and approval status.
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Substation Procurement Guides
11kV Compact Substation RFQ Checklist
An 11kV compact-substation RFQ should define the MV source and feeder duty, transformer capacity and LV system, protection and metering, enclosure arrangement, cable entry, site environment, auxiliary supply, tests, drawings, and package boundary. Review the buyer checklist and matching Jinxing product pages.
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Oil-Immersed Transformer Guides
11kV Distribution Transformer Price Factors
An 11kV distribution transformer price changes with capacity, LV voltage, conductor and core scope, impedance, losses, tapping, cooling, accessories, enclosure, tests, documents, quantity, packing, and destination. Request a defined technical scope before comparing prices. Review the buyer checklist and matching Jinxing product pages.
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Oil-Immersed Transformer Guides
11kV Oil-Immersed Transformer Manufacturer Checklist
An 11kV oil-immersed transformer supplier should be evaluated against the required capacity, LV voltage, impedance, tapping, losses, cooling, accessories, environment, routine-test documents, drawings, packing, and delivery scope for the project. Review the buyer checklist and matching Jinxing product pages.
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Ring Main Unit Guides
24kV Ring Main Unit Selection Guide
A 24kV RMU specification should define system voltage and insulation, current and fault duty, ring and transformer feeders, switching technology, protection, metering, interlocks, cable terminations, enclosure, environment, tests, and document scope. Review the buyer checklist and matching Jinxing product pages.
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Substation Procurement Guides
35kV Compact Substation Selection Guide
A 35kV compact-substation project should be defined from the utility interface, transformer rating, insulation and fault requirements, MV switching duty, LV distribution, protection and metering, enclosure layout, transport sections, environment, and test documentation. Review the buyer checklist and matching Jinxing product pages.
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