Indoor load switches · 12 kV series
An indoor AC vacuum load break switch for 12 kV, 50 Hz distribution cabinets. Specify the earthing arrangement, mounting direction, operating side and control method for your order.
Key ratings are for the 630 A arrangement with an earthing switch. Confirm the exact G/GD order code and ratings for a 1250 A or non-earthing assembly. FZRN64 is a separate switch-fuse combination.
Electrical and mechanical ratings for the 630 A arrangement with an earthing switch. Confirm the exact G/GD order code, short-time withstand option and control supply before specifying the assembly.
A dash means no applicable rating is specified for this load-switch arrangement. FZRN64 switch-fuse combination ratings are separate. Confirm the applicable earth-fault cable-charging, short-circuit making and peak withstand values on the approved rating schedule.
Specify 110 V or 220 V AC or DC for the selected mechanism. Confirm its final operating circuit and contact requirements before ordering.
Confirm ratings separately for a 1250 A or non-earthing assembly. Installations outside these service conditions require an agreed specification.
Normal and inverted mounting are available. Match the earthing arrangement, cabinet dimensions, operating side and wiring to the approved order drawings.
| Arrangement | Mechanical and primary fit | Control and interlocks |
|---|---|---|
| Normal installation | Side-operated. Confirm mounting points, cable entry, primary clearances and the left- or right-hand operating side against the cabinet layout. | When an earthing switch is fitted, its side must not be the incoming-line side. Confirm the selected mechanical and electrical interlocks. |
| Inverted installation | Select inverted mounting for bottom cable entry when an earthing switch is fitted. Check mounting points, clearances and operating-side access. | Keep the earthing-switch side away from the incoming line. Confirm the interlocks and final wiring for the selected assembly. |
For a 900 mm cabinet depth, the standard interface dimensions are 225 mm from the panel to the mounting hole and 525 mm from the panel to the B-phase centre. Confirm them on the approved order drawing; other dimensions must be specified.
| Circuit | Standard reservation |
|---|---|
| Auxiliary switch | 2 NO + 2 NC |
| Isolator microswitch | 1 NO + 1 NC |
| Earthing-switch microswitch | 1 NO + 1 NC |
NO = normally open; NC = normally closed. These reservations apply where auxiliary circuits are fitted. Confirm the final supplied contact set and terminal allocation; the manual version has no auxiliary contacts or wiring.
The load switch must be open before the isolator can open. The isolator must be open before the earthing switch can close.
The earthing switch must be open before the isolator can close. The isolator must be closed before the load switch can close.
The earthing switch must be closed before the cabinet door can open. The door must be closed before the earthing switch can open.
Confirm the interlock sequence for the selected assembly and cabinet-door arrangement.
Check the 630 A outline and compare mounting orientations with your cabinet layout. Confirm the selected model, mounting points, operating-side access and final dimensions before installation.
The manual provides ratings and installation guidance. Use the selection form to specify the switch and operating options for your order.
Available · PDF · 5 pages
Model codes, ratings, operation, outline dimensions and mounting arrangements. Match the FZN64 load-switch or separate FZRN64 switch-fuse configuration before use; the detailed FZN64 ratings cover the 630 A arrangement.
Open manual PDFAvailable · DOC · 2 pages
Specify the model, earthing option, mounting arrangement, operating side, mechanism, control supply, cabinet interface, auxiliary contacts and interlocks. Select the correct FZN or FZRN product prefix.
Download selection formConfiguration · FZN64-12 630 A
Liqiang reference quotation for a 12 kV, 630 A non-fuse vacuum load-switch assembly with isolation, earthing and a basic spring mechanism. Confirm the selected mechanism and cabinet interfaces before ordering.
Liqiang reference price
USD 750–1500 / set
USD per complete three-phase switch assembly. Final pricing is subject to the actual configuration, order quantity and written quotation from Liqiang. Cabinet, fuse equipment, optional motor/control package, shipping, taxes and installation are excluded.
This reference price range is provided by Liqiang for initial project enquiries. Request a written quotation to confirm the selected configuration and supply scope.
Answers to common questions about ratings, mounting, controls and cabinet fit.
The detailed ratings apply to the 630 A earthing arrangement. Confirm the complete ratings separately for 1250 A or non-earthing assemblies. See the complete ratings and service conditions.
FZN64 is the bare vacuum load switch. FZRN64 is a separate load-switch/fuse combination. Their ratings and drawings are not interchangeable; do not apply FZRN64 fuse-combination ratings to a bare FZN64 switch. See the technical documents for the selected model.
Specify normal or inverted mounting and left- or right-hand operation. When an earthing switch is fitted, its side must not be the incoming-line side; bottom cable entry requires inverted mounting. Confirm cabinet clearances and operating access in the mounting and control requirements.
No. Specify 110 V or 220 V AC or DC; the standard control supply is AC 220 V. AC and DC motor versions are not interchangeable. Manual closing with electric tripping accepts AC or DC control power. Confirm the mechanism, supply and final wiring in the control requirements.
Use the FZN64-12D/630 figure as a reference. The door cutout is 210 × 424 mm and mechanism dimension L is normally 200 mm, with customized dimensions available. Final mounting points, clearances and cabinet fit must follow the approved order drawing. See the drawing references.
Provide the complete model code, rated current and short-time withstand option, earthing requirement, mounting orientation, operating side, mechanism, control supply, cabinet depth, auxiliary contacts and interlocks. Specify the bare FZN64 switch or separate FZRN64 combination and include the cabinet drawing. Complete the selection form.
