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KSF425TPSN Fireman switch
ABB KSF425TPSN 4-pole fireman switch with IP65 silumin aluminium enclosure, 25 A AC-22A rating, 16 A AC-23A rating and 7.5 kW motor switching capacity for photovoltaic and emergency isolation applications.
£104.04
Why Choose the ABB 2CMA142437R1000 Fireman Switch?
The ABB 2CMA142437R1000 is a heavy-duty 4-pole enclosed fireman switch designed to provide safe and dependable isolation of three-phase electrical installations during emergency situations. Part of ABB's trusted KSF fireman switch range, the KSF425TPSN is specifically developed for photovoltaic (PV) systems, commercial buildings and industrial installations where rapid emergency power disconnection is required.
Manufactured from a rigid silumin aluminium enclosure with UV-protected paint, the switch is built to withstand demanding indoor and outdoor environments. The IP65-rated enclosure, interlocked cover and specialist fireman's operating handle provide excellent protection against dust and water ingress while ensuring safe emergency operation. The handle is designed for operation using a fire brigade hook pole and can be padlocked in the OFF position.
Rated at 25 A AC-22A and 16 A AC-23A at 690 V AC with a motor switching capacity of up to 7.5 kW, the ABB KSF425TPSN is suitable for photovoltaic systems, inverter isolation, industrial machinery and commercial electrical installations. It features a switchable neutral terminal, PE terminal and threaded cable entries for straightforward installation.
Key Advantages
- Heavy-duty 4-pole enclosed fireman switch.
- 25 A AC-22A / 16 A AC-23A switching capability.
- Robust IP65 silumin aluminium enclosure.
- Specialist fireman's operating handle with interlocked cover.
- Padlockable handle for enhanced safety.
- Suitable for indoor and outdoor photovoltaic and industrial installations.
Key Features
- ABB KSF Fireman Switch series.
- Model KSF425TPSN.
- Order code 2CMA142437R1000.
- 4-pole switch disconnector.
- 25 A AC-22A rating.
- 16 A AC-23A motor duty rating.
- 7.5 kW motor switching capacity.
- IP65 silumin aluminium enclosure.
- Special fireman's operating handle with padlock facility.
- Interlocked enclosure cover.
- Switchable neutral terminal and PE terminal included.
- 2 × M25 threaded cable entries top and bottom.
Reliable Emergency Isolation for Photovoltaic and Industrial Installations
Fireman switches provide emergency services with a clearly identifiable means of disconnecting electrical power during fire incidents. Their distinctive operating handle allows rapid isolation of electrical installations while helping improve firefighter safety during emergency response.
The ABB KSF425TPSN combines ABB's proven switch-disconnector technology with a rugged aluminium enclosure, making it an excellent solution for renewable energy systems, industrial facilities and commercial buildings requiring dependable emergency electrical isolation.
Typical Applications
- Photovoltaic (PV) installations.
- Solar inverter isolation.
- Commercial electrical systems.
- Industrial machinery isolation.
- Building services and HVAC equipment.
- Renewable energy installations.
Technical Specifications
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| Material | Aluminium | |
|---|---|---|
| Device Type | Enclosed switch disconnector | |
| Power | 7.5 kW | |
| Current | 32 A | |
| Phase | Three Phase | |
| IP Rating | IP65 | |
| Poles | 4-pole | |
| Manufacturer | ABB | |
| Series | KSF Fireman Switches | |
| Model | KSF425TPSN | |
| Order number | 2CMA142437R1000 | |
| Product type | Enclosed fireman switch | |
| Rated current (AC-22A) | 25 A | |
| Rated current (AC-23A @ 690 V) | 16 A | |
| Motor switching capacity | 7.5 kW | |
| Maximum operating voltage | 690 V AC | |
| Number of poles | 4 | |
| Protection rating | IP65 | |
| Enclosure material | Silumin aluminium alloy | |
| Cable entries | 2 × M25 top / 2 × M25 bottom | |
| Neutral terminal | Switchable | |
| Protective earth terminal | Included | |
| Terminal type | Screw clamp (0.75–10 mm²) | |
| Mounting type | Surface mounting | |
| Dimensions (H × W × D) | 130 × 111 × 60 mm | |
| Weight | Approx. 0.59 kg |
Frequently Asked Questions
What is the ABB 2CMA142437R1000 used for?
It provides emergency isolation of four-pole electrical circuits, particularly within photovoltaic systems, commercial buildings and industrial electrical installations.
How many poles does this fireman switch have?
The ABB KSF425TPSN is a 4-pole enclosed fireman switch designed for three-phase electrical systems with switched neutral.
Is it suitable for outdoor installation?
Yes. The silumin aluminium enclosure is rated IP65 and is suitable for indoor and outdoor use when installed with appropriate compression cable glands.
Does this switch include auxiliary contacts?
No. This model is supplied without auxiliary contacts, although it supports the addition of one optional NO auxiliary contact.
Where is this fireman switch commonly installed?
It is widely used on photovoltaic systems, renewable energy installations, commercial premises and industrial facilities where reliable emergency isolation is required.
Trusted by Electrical Professionals Worldwide
ABB fireman switches are trusted by renewable energy installers, electrical contractors and industrial engineers worldwide for delivering dependable emergency isolation, robust construction and long-term operational reliability.
