Indoor load switches · 12 kV series
An indoor three-phase vacuum load switch for 12 kV, 50 Hz distribution equipment. The ratings below apply to FZN25-12D/630-20. Confirm the earthing arrangement, operating method and cabinet interfaces for your order.
Confirm short-circuit protection for the selected assembly. FZRN25 switch-fuse combination ratings are separate.
Ratings for FZN25-12D/630-20. Check the selected operating mechanism, control supply and service conditions before specifying the assembly.
A dash means no rating is specified for this configuration. Do not apply FZRN25 switch-fuse combination ratings to FZN25. Confirm the exact /630-20 or /T630-20 order designation on the approved drawing.
Confirm the selected model and installation environment. Projects outside these service conditions require an agreed specification.
Normal and inverted mounting are available. Match the earthing arrangement, cabinet dimensions, operating side and control wiring to the approved order drawings.
| Arrangement | Mechanical and primary fit | Control and interlocks |
|---|---|---|
| Normal installation | Side-operated. Confirm the mounting points, cable entry, primary clearances and operating side against the cabinet layout. | When an earthing switch is selected, its side must not be the incoming-line side. Confirm the mechanical and electrical interlocks for the order. |
| Inverted installation | Select inverted installation for bottom cable entry when an earthing switch is fitted. Check mounting points and clearances against the approved layout. | Keep the earthing-switch side away from the incoming line. Confirm the selected operating side and interlock arrangement. |
For a 900 mm cabinet depth, the standard interface dimensions are 175 mm from the panel to the mounting hole and 495 mm from the panel to the B-phase centre. Confirm these dimensions on the approved order drawing; other dimensions must be specified.
Load-switch codes: FZN25-12/630-20 or FZN25-12D/630-20. The D version includes an earthing switch. The detailed ratings on this page apply to FZN25-12D/630-20; confirm the ratings separately for a non-D order.
Operating side: specify left- or right-hand side operation.
Product type: FZRN25 is a separate switch-fuse combination with different ratings.
Mechanism: manual, motor-operated, or manual closing with electric tripping. The manual version has no auxiliary contacts or wiring; manual closing with electric tripping accepts AC or DC control power.
Supply: specify 110 V or 220 V AC or DC. The standard supply is AC 220 V; AC and DC motor versions are not interchangeable.
Closing circuit: specify whether closing self-hold is required. The standard circuit has no relay self-hold function.
Other options: specify a voltage sensor, electromagnetic lock, back-to-back interlock, live-voltage indicator or program lock. The voltage sensor is omitted as standard.
| Mechanism | Auxiliary contacts available | Connected to terminal block | Earthing microswitch |
|---|---|---|---|
| Manual closing with electric tripping | 2 NO + 3 NC | 2 NO + 2 NC | None |
| Motor-operated | 4 NO + 3 NC | 2 NO + 1 NC | 2 NO; not connected to the terminal block |
NO = normally open; NC = normally closed. Confirm the required contact count, terminal allocation and earthing microswitch wiring on the final terminal schedule.
Compare the front outline and motor-control functions with your cabinet layout. Confirm final mounting dimensions, control supply and terminal allocation on the approved order drawings.
The manual provides ratings and installation guidance. Use the selection form to specify the switch and operating options for your order.
Available · PDF · 7 pages
Model codes, ratings, operation and installation drawings for FZN25 load switches and FZRN25 switch-fuse combinations. Match the selected model and configuration before use.
Available · DOC · 1 page
Specify the model, earthing option, mounting arrangement, operating side, mechanism, control supply, auxiliary contacts and interlocks.
Configuration · FZN25-12 630 A
Price reference for the specified FZN25-12 630 A configuration. Base 630 A switch configuration. FZRN fuse combinations and selected fuse links are quoted separately.
Price range
USD 275–280 / set
USD per complete three-phase set. Minimum order: 1 set. USD 280 per set for 1–49 sets; USD 275 per set for 50+ 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 |
|---|---|
| 1–49 | USD 280 |
| 50+ | USD 275 |
Answers to common questions about earthing, protection, controls and installation.
The FZN25-12D version includes an earthing switch. Specify the D or non-D arrangement when ordering. The detailed ratings on this page apply to FZN25-12D/630-20; confirm ratings separately for a non-D assembly. See the configuration options.
No. For FZN25-12D/630-20, 20 kA is the short-time withstand rating. No short-circuit breaking rating is specified here. Confirm short-circuit protection for the selected assembly; FZRN25 switch-fuse combination ratings are separate. See the complete ratings.
No. Specify 110 V or 220 V AC or DC for the motor-operated version; the standard supply is AC 220 V. Manual closing with electric tripping accepts AC or DC control power. Confirm the selected supply and final circuit in the control requirements.
Use them as references for the illustrated family arrangement. Final dimensions, mechanism thickness, earthing position, cabinet fit and terminal allocation must follow the approved order drawings. See the outline and circuit references.
Confirm the model, quantity, earthing option, mounting arrangement, cable entry, operating side, mechanism, control supply, auxiliary contacts and interlocks. Complete the selection form with these requirements.
