Why Choose the ABB OTP16HT3M 7.5 kW Enclosed Safety Switch?
The ABB OTP16HT3M (1SCA022400R9410) is a compact and durable three-pole enclosed safety switch-disconnector designed for reliable local isolation of electrical machinery, motors and industrial equipment. As part of the ABB OTP plastic enclosed safety switch series, it provides dependable manual ON/OFF switching for industrial and commercial electrical installations where safe equipment isolation and convenient local control are essential.
This safety switch features a 7.5 kW AC-23A motor switching rating at 415 V AC, a 16 A rated operational current and an integrated normally open (1NO) auxiliary contact. Its black rotary selector handle provides straightforward manual operation, while the padlockable mechanism and interlocked enclosure cover help support controlled electrical isolation during equipment maintenance and servicing.
Housed in a robust glass-fibre-reinforced polycarbonate enclosure, the OTP16HT3M provides IP65 protection against dust and water jets when correctly installed. The enclosure measures 120 × 85 × 60 mm and includes cable entry provisions at the top and bottom, making it suitable for installation close to machinery, motors, pumps, conveyors and other industrial equipment.
Key Advantages
- Compact three-pole enclosed safety switch-disconnector for industrial machinery isolation.
- 7.5 kW AC-23A motor switching capacity at 415 V AC for suitable three-phase equipment.
- 16 A rated operational current under AC-23A conditions at 415 V AC.
- Integrated 1NO auxiliary contact for signalling and control circuit applications.
- IP65-rated plastic enclosure provides protection against dust and water jets.
- Black rotary selector handle offers straightforward ON/OFF operation.
- Padlockable handle accommodating up to three padlocks supports controlled maintenance isolation.
- Interlocked enclosure cover helps prevent access while the switch is in the ON position.
- UV-protected, glass-fibre-reinforced polycarbonate housing supports indoor and outdoor installation.
- Fixed neutral and protective earth terminals simplify wiring in suitable electrical systems.
- Top and bottom cable entries provide flexibility during installation.
- Compact construction makes the switch suitable for local mounting close to industrial machinery.
Key Features
- ABB OTP plastic enclosed safety switch series.
- 7.5 kW motor switching rating at 415 V AC.
- Three-pole (3P) main switching configuration.
- 16 A AC-23A rated operational current at 415 V AC.
- 10 A AC-23A rated operational current at 690 V AC.
- 40 A conventional enclosed thermal current.
- One normally open (1NO) auxiliary contact supplied fitted.
- Black round selector handle with ON/OFF operation.
- Padlockable OFF position accommodating up to three padlocks.
- Interlocked enclosure cover for controlled access.
- IP65 enclosure protection rating according to IEC 60529.
- IK08 enclosure impact resistance.
- Glass-fibre-reinforced polycarbonate enclosure with UV protection.
- Grey enclosure finish, RAL 7035.
- Two M20 cable entry positions at the top and bottom.
- 0.75–10 mm² main circuit conductor connection capacity.
- Fixed neutral and protective earth terminals.
- Two membrane cable glands and two pull stoppers included.
- Compact 120 × 85 × 60 mm enclosure for convenient wall or machinery mounting.
Technical Specifications
- Manufacturer: ABB
- Series: OTP Plastic Enclosed Safety Switches
- Model: OTP16HT3M
- ABB order code: OTP16HT3M
- ABB product ID: 1SCA022400R9410
- ABB product group: 311004-Plastic Enclosed Switches (Otp)
- Product type: Enclosed safety switch-disconnector
- Application: Local motor and machinery isolation
- Maximum motor power AC-23A at 415 V AC: 7.5 kW
- Maximum motor power AC-23A at 690 V AC: 7.5 kW
- Number of poles: 3
- Switching positions: I-O / ON-OFF
- Operating mechanism: Manual rotary selector
- Rated operational current AC-23A at 415 V AC: 16 A
- Rated operational current AC-23A at 690 V AC: 10 A
- Conventional enclosed thermal current (Ithe): 40 A
- Rated insulation voltage (Ui): 750 V
- Rated short-time withstand current (Icw): 0.5 kA for 1 s
- Auxiliary contacts fitted: 1NO
- Normally open auxiliary contacts: 1
- Normally closed auxiliary contacts: 0
- Handle type: Round rotary selector handle
- Handle colour: Black
- Handle padlocking: Up to 3 padlocks
- Cover interlock: Yes
- Enclosure material: Glass-fibre-reinforced polycarbonate
- Enclosure colour: Grey, RAL 7035
- Enclosure protection rating: IP65
- Enclosure impact resistance: IK08
- UV protection: Yes
- Mounting type: Surface mounting
- Cable entry position: Top and bottom
- Cable entry configuration: 2 × M20 top / 2 × M20 bottom
- Main circuit terminal type: Screw clamp
- Main circuit conductor capacity: 0.75–10 mm²
- Neutral terminal: Fixed neutral terminal included
- Protective earth terminal: Included
- PE terminal conductor capacity: 0.75–2.5 mm²
- Included cable accessories: 2 membrane cable glands and 2 pull stoppers
- Enclosure dimensions (H × W × D): 120 × 85 × 60 mm
- Net weight: approx. 0.4 kg
- EAN: 6417019130798
- Country of origin: Finland
- Applicable standards: IEC 60947-1 and IEC 60947-3
Reliable Local Isolation for Industrial Machinery
Enclosed safety switches such as the ABB OTP16HT3M provide a convenient means of manually disconnecting electrical equipment from its power supply. The three-pole switch-disconnector allows all three phase conductors to be opened together, supporting safe isolation procedures during machinery maintenance, inspection and repair.
The black rotary selector handle provides clear ON/OFF operation and can be secured in the OFF position using up to three padlocks. This supports maintenance procedures where equipment must remain electrically isolated while work is carried out. The enclosure cover is mechanically interlocked with the operating mechanism, helping prevent access to internal components while the switch is in the ON position.
The integrated 1NO auxiliary contact can be used within appropriately designed control circuits to provide switch-position signalling or control interlocking. This allows the OTP16HT3M to be incorporated into industrial machinery control arrangements where monitoring of the isolator position is required.
The ABB OTP series uses a rigid, UV-protected glass-fibre-reinforced polycarbonate enclosure designed to withstand demanding industrial conditions. Its IP65 protection rating helps protect internal switching components against dust and water jets, making it suitable for correctly installed indoor and outdoor applications.
With its compact enclosure, fixed neutral and protective earth terminals, and convenient top and bottom cable entry provisions, the OTP16HT3M offers a practical solution for local motor isolation. The device is a switch-disconnector rather than an overload relay or circuit breaker, so suitable upstream short-circuit and overload protection must be provided according to the electrical installation requirements.
Typical Applications
- Local isolation of three-phase industrial motors.
- Conveyor and material handling equipment.
- Industrial pumps and pumping stations.
- Fans, ventilation and extraction systems.
- Packaging and production machinery.
- Manufacturing and processing equipment.
- Industrial machinery maintenance isolation points.
- Heating, ventilation and air conditioning equipment.
- Commercial and industrial building services.
- Water treatment and wastewater processing machinery.
- Outdoor machinery and equipment installations.
- OEM machine building and industrial automation systems.
