Source K- and A-type spring operating mechanisms, lower-earthing and lower-door interlocks, fuse-release devices, and SF6 load-break-switch accessories for ring main units. Compare available configurations, technical data and drawings, then send your installed switch details for an engineering quotation.
Compare K- and A-type SF6 load-break switch operating mechanisms, lower earthing and door interlocks, fuse-release hardware and photo-identified accessories. Each card uses a clean product image; the modal shows source-backed engineering drawings or accessory photo groups where supplied.
Review the source-backed drawing for the selected record.
Confirm the installed part code or nameplate, duty, mounting centres, shaft and linkage direction, operating sequence or control voltage, and every retained mating part before quotation. Visual similarity or a catalogue drawing alone does not prove compatibility.
| Field | Source-backed record |
|---|---|
| Mechanism type | K-type spring operating mechanism |
| Source suffix | …-SK |
| Operation | Manual |
| Source application | Incoming switch; FLN36-12D 12 kV context |
| Operating functions | Closing, opening and earthing by the stated handle sequence |
| Field | Source-backed record |
|---|---|
| Mechanism type | K-type spring operating mechanism |
| Source suffix | …-DK |
| Operation | Motor-operated |
| Source application | Incoming switch; FLN36-12D 12 kV context |
| Order confirmation | Motor/control supply, complete code, mounting, shaft and switch interface |
| Field | Source-backed record |
|---|---|
| Mechanism type | A-type spring operating mechanism |
| Source suffix | …-SA |
| Operation | Manual |
| Source application | Outgoing switch; FLRN36-12D 12 kV context |
| Operating functions | Closing, opening, earthing and fuse-release/manual-opening interface |
| Field | Source-backed record |
|---|---|
| Mechanism type | A-type spring operating mechanism |
| Source suffix | …-DA |
| Operation | Motor-operated |
| Source application | Outgoing switch; FLRN36-12D 12 kV context |
| Order confirmation | Motor voltage, optional shunt-release voltage, complete code and mounting interface |
| No. | Item | Code | Qty |
|---|---|---|---|
| 1 | Connecting plate | FLN.8XS.135.082 | 1 |
| 2 | Bolt M5X12 | GB/T5783-2000 | 2 |
| 3 | Flat gasket A class 5 | GB/T97.1-2002 | 2 |
| 4 | Grounding strip | FLN.8XS.137.010 | 1 |
| 5 | Welding of lower earthing interlocking blocks | FLN.5XS.143.001 | 1 |
| 6 | Bottom earthing plate | FLN.8XS.137.012 | 1 |
| 7 | Welding of lower earthing plate | FLN.5XS.150.038 | 1 |
| 8 | Lower earthing knife switch | FLN.5XS.566.002 | 1 |
| 9 | Welding of mounting rack | FLN.5XS.042.001 | 1 |
| 10 | Earthing interlocking spring | FLN.8XS.288.055 | 1 |
| 11 | Nut M6 | GB/T 889.1-2000 | 3 |
| 12 | Flat gasket A class 6 | GB/T97.1-2002 | 3 |
| 13 | Nut M12 | GB/T 889.1-2000 | 1 |
| 14 | Flat gasket A class 12 | GB/T97.1-2002 | 3 |
| 15 | Nut M10 | GB/T 889.1-2000 | 1 |
| 16 | Flat gasket A class 10 | GB/T97.1-2002 | 1 |
| No. | Item | Code | Qty |
|---|---|---|---|
| 1 | Welding of slider | FLN.5XS.174.081 | 1 |
| 2 | Guide rail | FLN.8XS.260.051 | 1 |
| 3 | Elastic cylindrical pin 4X22 | GB/T 879.1-2000 | 1 |
| 4 | Reset spring | FLN.8XS.282.095 | 1 |
| 5 | Screw M5X16 | GB/T 2672-2004 | 2 |
| 6 | Standard spring washer | GB/T 93-1987 | 4 |
| 7 | Flat gasket A class 5 | GB/T 97.1-2002 | 4 |
| 8 | Pulling plate | FLN.8XS.137.009 | 1 |
| 9 | Screw M5X12 | GB/T 2672-2004 | 2 |
| 10 | Pull rod | FLN.8XS.174.082 | 1 |
| 11 | Door holder | FLN.8XS.885.008 | 1 |
| No. | Item | Code | Qty |
|---|---|---|---|
| 1 | Reset spring | 8XS.288.083F | 1 |
| 2 | Upper fixed plate | FLN.8XS.100.081 | 1 |
| 3 | Connecting plate | FLN.8XS.174.078 | 1 |
| 4 | Gasket | GB93-1987 | 5 |
| 5 | Screw M5X12 | GB/T 2672-2004 | 5 |
| 6 | Flat gasket | GB/T97.1-2002 | 5 |
| 7 | Trip indicator board | FLN.8XS.174.079 | 1 |
| 8 | Trip rod group | 5XS.233.002F | 1 |
| 9 | Upper fuse holder assembly | FLN.5XS.045.005 | 3 |
| 10 | Lower outlet holder assembly | 5XS.104.010F | 3 |
| 11 | Sleeve | 8XS.263.017F | 2 |
| 12 | Trip rod assembly | FLN.5XS.174.079 | 1 |
| 13 | Screw M5X20 | GB/T 70.1-2000 | 2 |
| Group | Available visual reference |
|---|---|
| Complete accessory kits | Photo references include complete three-position and two-position SF6 load-break switch accessory kits, upper and lower housings, plastic-spindle parts and a 1250 A steel-shaft set. |
| Contacts, terminals and operating parts | Photo references include earthing and position contacts, terminal seats, pressure gauges, dynamic seals, box bottoms, copper air-valve parts, springs, magnets, an operating handle and an interlock assembly. |
Start with the installed switch and function, then confirm the mechanical interface and operating/control requirements. These three checks help narrow the correct mechanism, interlock or accessory before quotation.
Review each product group by the function it performs in the RMU. The application notes below show which switch duty, mechanism, linkage and mounting details are needed for selection.
Compare K- and A-type manual and motor-operated configurations, then review the available drawings for FLN.5XS interlocks and the fuse-release device. Use the product photos to identify loose accessories before confirming dimensions and fit.
K-type is used for the incoming load-switch function; A-type supports the outgoing switch-fuse function. The S suffix identifies manual operation and D identifies motor operation within the documented family.
| Family | Switch function | Manual | Motor-operated | Specify when ordering |
|---|---|---|---|---|
| K-Type | Incoming position; close / open / earth operation | …-SKManual K-type spring mechanism | …-DKMotor-operated K-type spring mechanism | Installed switch, shaft direction, mounting geometry, operating sequence and motor voltage where used. |
| A-Type | Outgoing switch or switch-fuse position; release path included | …-SAManual A-type spring mechanism | …-DAMotor-operated A-type spring mechanism | Fuse-release path, shunt trip, motor / coil voltage, shaft, mounting geometry and operating sequence. |
Availability note: The mechanism information on this page covers the documented FLN36-12D / FLRN36-12D 12 kV configuration. Send the complete switch and mechanism code for model confirmation.
Review the drawing and parts list for the exact FLN.5XS reference. Confirm mounting centres, shaft or linkage direction, travel and mating parts against the installed assembly.
Engineering Drawing & Parts List
Engineering Drawing & Parts List
Engineering Drawing & Parts List
Browse the lower-earthing assembly, complete accessory kits and loose switch parts by image. For a quotation, add the installed switch model, voltage class, dimensions, orientation and close-up photos.
Use this checklist to match the selected operating mechanism, interlock or loose part to the installed SF6 load break switch. Record the model, electrical/control requirements, operating sequence and mechanical interface before requesting a quotation.
| Component | Information to provide | Why it affects selection |
|---|---|---|
| K-Type operating mechanism | FLN36 switch model, 12 kV incoming function, manual …-SK or motor-operated …-DK configuration, shaft direction, mounting geometry, sequence and motor voltage. | The K/A family, operating method and fitted shaft/linkage interface determine whether the mechanism can be installed and operated correctly. |
| A-Type operating mechanism | FLRN36 switch-fuse model, outgoing function, manual …-SA or motor-operated …-DA configuration, fuse-release and shunt-trip requirements, voltages, shaft, mounting and sequence. | The A-type release path and electrical options must match the installed switch-fuse arrangement. |
| FLN.5XS.363.016 lower earthing interlock | Fitted code, operating direction, release point, shaft and linkage relationship, mounting centres, required travel, adjacent mechanism and close/open/earth sequence. | The lower-earthing function depends on the exact release point, travel and relationship with the installed mechanism. |
| FLN.5XS.362.016 lower door interlock | Fitted code, door catch and holder dimensions, mounting centres, rod direction and travel, compartment clearance, adjacent mechanism and permitted door/earthing sequence. | Door access depends on both the linkage geometry and the permitted switch/earthing sequence. |
| FLN.5XS.174.080 fuse release device | Installed A-type mechanism, fuse-striker and trip-rod direction, contact point, sleeve and rod arrangement, mounting geometry, reset path and shunt-release requirement. | The fuse release must transfer the striker operation into the correct A-type opening path. |
| Accessories & loose parts | Overall and close-up photos, switch model, voltage class where relevant, fitted position, dimensions, orientation or handedness, mating parts, quantity and required supply scope. | Visible form can identify a product group, but the installed dimensions and mating parts determine the final match. |
Send the available nameplate, drawings, dimensions and photos. We will treat the item as a provisional match until the missing interface or operating details are confirmed.
Send the switch identification, required function, mechanical interface and quantity in one request. Complete information helps us review the correct mechanism, interlock or accessory without delaying the quotation.
When these details are ready, use the Request a Quote form in the footer and attach your drawings and photos.
Answers to common questions about K-type and A-type mechanisms, manual and motorized operation, fuse-release devices, interlocks and replacement-part selection.
A K-type spring mechanism is used for the incoming load-switch function. An A-type mechanism is used for the outgoing switch-fuse function and adds the fuse-striker trip path; an optional shunt release can also be specified. Confirm the installed FLN36 or FLRN36 switch, shaft position and mounting arrangement before selecting either family.
Yes. The documented K-type family is available as manual …-SK or motor-operated …-DK, while the A-type family is available as manual …-SA or motor-operated …-DA. For a motorized mechanism, specify the motor or control voltage and any shunt-release requirement with the order.
Provide the complete RMU or load-break-switch model, component nameplate or part code, voltage class, incoming or outgoing function, manual or motor operation, control voltage, operating sequence, mounting centres, shaft and linkage direction, quantity, and clear overall and close-up photos. Include the cabinet or assembly drawing when available.
When a fuse striker operates, the three-phase release linkage trips the opening path of the A-type outgoing switch-fuse mechanism so the load-break switch opens. Match the FLN.5XS.174.080 device to the installed A-type mechanism, striker position, trip-rod direction, mounting geometry and reset arrangement.
Photos can narrow the likely accessory group, but they do not confirm fit. Add the switch model, voltage class where relevant, installed position, critical dimensions, orientation or handedness, retained mating parts and quantity so the replacement can be checked before quotation.