12 kV series · Indoor earthing
Three-pole, spring-operated earthing switch for indoor 12 kV, 50 Hz systems. Select the paired thermal withstand, dynamic withstand and short-circuit making values, then match the phase spacing and operating interfaces to the panel.
The selection form specifies JN15-12/31.5. Confirm the /40 variant, exact phase spacing and approved assembly before ordering.
Select the withstand and making combination, then match the phase spacing, operating shaft and indoor site conditions.
The selection form specifies JN15-12/31.5. Confirm availability of the /40 variant and its complete withstand and making combination on the approved order drawing. Making current is distinct from interruption capability.
Agree site conditions outside this envelope before ordering.
Match the phase spacing and mounting pattern to the panel. Specify operating direction, shaft projection, sensors and auxiliary contacts together.
| Arrangement | Mechanical and primary fit | Operating interfaces and accessories |
|---|---|---|
| Left operation | Face the spring assembly; a shaft on the left identifies left operation. Confirm the contact and blade positions in this reference view. | Match the crank, sleeve and cabinet linkage to the left-side shaft. |
| Right operation | Use the right-operation assembly and confirm the shaft side against the spring-facing reference view. | Match the shaft, crank and access space to the right-side cabinet linkage. |
| Specified cabinet interface | Confirm phase spacing, mounting holes, flexible earthing connections and the complete blade travel. | Agree any nonstandard shaft projection or linkage dimensions on the approved order drawing. |
Provide quantity, complete model, phase spacing and operating direction. Confirm shaft projection, sensors, auxiliary contacts and the crank sleeve against the complete order drawing.
Match the phase spacing, operating direction and terminal pattern to the cabinet. Use the exact ordered outline, mounting-hole pattern and shaft interfaces together.
| Model reference | L | E | C |
|---|---|---|---|
| JN15-12/31.5(40)-210 | 655 | 210 | 516 |
| JN15-12/31.5(40)-230 | 695 | 230 | 556 |
| JN15-12/31.5(40)-250 | 735 | 250 | 596 |
| JN15-12/31.5(40)-275 | 810 | 275 | 646 |
Confirm the /31.5 or /40 ordered variant, dimension units, tolerances and cabinet fit on the approved order drawing. Use the matching 12 kV geometry when consulting the series drawing.
Find installation dimensions, operating instructions, order options and insulation test results below. Use the dedicated manual and selection form for the ordered assembly; the insulation report covers its named sample.
Available · PDF · 4 pages
Dedicated ratings, service conditions, spring mechanism, outline and terminal patterns. Match the selected phase spacing, operating direction and ordered variant.
Available · PDF · 12 pages
English series ratings, operating principles and installation appendices. Use the JN15 /31.5 model entries and matching 12 kV geometry for JN15 selection.
Available · DOC
Specify complete model, quantity, left/right operation, phase spacing, shaft projection, sensor or insulator arrangement, auxiliary contacts and operating-crank sleeve.
Available · PDF · 17 pages
Report JC202505DL318, dated 12 May 2025, records power-frequency, lightning-impulse and auxiliary/control-circuit insulation tests for the named JN15-12(D)/31.5 sample. This insulation scope does not establish earthing short-circuit making performance.
See Liqiang manufacturing and inspection activities. Model reports and factory inspection records serve different purposes; match the required documents to the proposed equipment.
Configuration · JN15-12/31.5-210
Price reference for the specified JN15-12/31.5-210 configuration. 31.5 kA / 210 mm configuration; other phase spacings and the 40 kA version require a separate quotation.
Price range
USD 90–100 / set
USD per complete three-phase set. Minimum order: 1 set. USD 100 per set for 1–9 sets; USD 90 per set for 10+ sets. Shipping and taxes are excluded. Other configurations and accessories require a separate quotation. Confirm the specification and final quotation before ordering.
The range reflects order-quantity tiers for this configuration; it does not cover every option in the series.
| Quantity (sets) | Price per set |
|---|---|
| 1–9 | USD 100 |
| 10+ | USD 90 |
Answers about earthing duty, operating direction, cabinet dimensions and ordering requirements.
JN15-12 is specified at 12 kV and 50 Hz. The /31.5 option pairs 31.5 kA for 4 s with 80 kA dynamic withstand and 80 kA short-circuit making. The /40 option pairs 40 kA for 4 s with 100 kA dynamic withstand and 100 kA making; confirm its availability and complete ordered designation. For a 60 Hz system, obtain product-specific confirmation. See the rating schedule.
JN15-12 is an indoor earthing switch with a spring-operated closing mechanism. Its short-circuit making rating concerns closing duty; it is not a load-breaking or short-circuit interruption rating. Coordinate earthing operation and interlocking with the approved switchgear operating procedure.
Face the spring mechanism: a shaft extending to the left is left operation; a shaft extending to the right is right operation. Confirm shaft projection, operating-crank sleeve and external linkage on the approved order drawing. Use the operating-interface choices.
Select the required 210, 230, 250 or 275 mm phase spacing. The standard selection-form arrangement uses 210 mm spacing and a 516 × 240 mounting reference. Confirm the matching L/E/C outline, mounting holes, terminal pattern, dimension units and tolerances, shaft projection and blade clearances on the installation drawing.
Specify sensors for the intended voltage-presence indication arrangement. Choose ordinary insulators when no voltage-presence indicator is connected. The normal auxiliary arrangement is two open and two closed contacts with six terminals. Confirm the required contact functions and cabinet interfaces in the configuration choices.
Provide quantity, the complete model and current duties, system frequency, phase spacing, operating direction and mounting drawing. Include shaft projection, linkage requirements, sensors or ordinary insulators, and auxiliary contacts. The manuals and selection form help organize the required arrangement.
