Westhomes WSH3-100 4P Isolator Switch | 100A 400V 2kA Surge Protection
WSH3-100 4P isolating switch offers 20-100A rating, 400V insulation, 2kA short-time withstand current & -5~+40°C operation. Ideal for 4-phase industrial power isolation.
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Westhomes WSH3-100 4P Isolator Switch
WSH3-100 4P isolating switch offers 20-100A rating, 400V insulation, 2kA short-time withstand current & -5~+40°C operation. Ideal for 4-phase industrial power isolation.
Westhomes WSH3-100 4-Pole Miniature Isolator Switch is engineered for 4-phase industrial power systems, delivering flexible 20-100A current capacity and reliable power isolation. Featuring a thermosetting plastic shell, 400V insulation, and 2kA overcurrent protection, it prevents accidental power transmission and ensures stable operation in harsh -5°C to +40°C environments.
Key Features：
4-Pole Configuration: Optimized for 4-phase power systems, with 1P/2P/3P options for versatile integration..
Broad Current Range: 20-100A rated current adapts to light to heavy-duty industrial load requirements.
Surge Protection: 2kA short-time withstand current defends against overcurrent surges and electrical faults.
Temperature Resilience: Stable performance from -5°C to +40°C for indoor/outdoor industrial environments.
Applications:
4-Phase Power Distribution
Renewable Energy Installations
Agricultural Equipment
Main Technical Parameters
| Model | WSH3-10018model;WSH3-10027model |
| Rated Current In(A) | 32、40、50、63、80、100 |
| Poles | 1P、2P、3P、4P |
| Selective categories | AC-22A |
| NominalInsulation Voltage Ui(V) | 690 |
| Rated OperationalVoltage Ue(V) | AC230V/AC400V |
| Rated Impulse Withstandvoltage Uimp(kV) | 4 |
| Rated Short Time Current lcw(kA)/1S | 1.2 |
| Rated Short-Circuit AbilityIcm(kA) | 2 |
| Mechanical Endurance | 20000 |
| Electrical Endurance | 10000 |
Packaging and delivery
| Selling Units | Single item |
Lead time
| Quantity (pieces) | 1 – 1,000 | > 1,000 |
| Lead time (days) | 30 | To be negotiated |
Key attributes
| Rated Voltage | 230 V, 400 V |
| Material | Copper |
| Place of Origin | Zhejiang, China |
| Type | Switches |
| Model Number | WSH3-100 |
| Brand Name | Westhomes |
155 MBFREQUENTLY ASKED QUESTION (FAQ)
What is the Westhomes WSH3-100 4P Isolator Switch?
The Westhomes WSH3-100 4P Isolator Switch is a four-pole electrical isolation device designed to safely disconnect circuits from the power supply. It is mainly used for circuit isolation, maintenance safety, and manual switching in low-voltage distribution systems.
What does 4P mean on the WSH3-100 Isolator Switch?
4P means the isolator switch has four poles. In a three-phase electrical system, a 4-pole isolator can disconnect the three phase conductors and the neutral conductor simultaneously, providing complete isolation of the circuit.
What applications is the WSH3-100 4P Isolator Switch suitable for?
The WSH3-100 4P Isolator Switch is suitable for residential, commercial, and industrial low-voltage electrical applications. It can be used in distribution boards, control panels, power distribution systems, and equipment maintenance circuits where reliable isolation is required.
What is the difference between an isolator switch and a circuit breaker?
An isolator switch is mainly designed for safe circuit disconnection and electrical isolation during maintenance or inspection. A circuit breaker provides protection functions such as overload and short-circuit protection. An isolator switch should normally be used together with appropriate protective devices.
Can the WSH3-100 4P Isolator Switch be used for three-phase systems?
Yes. The 4-pole design makes the WSH3-100 suitable for three-phase systems where both phase and neutral isolation are required. It can disconnect all four conductors at the same time to improve operational safety.
What is the rated current of the Westhomes WSH3-100 Isolator Switch?
The WSH3-100 series is designed for applications up to 100A rated current. The selected current rating should match the electrical load requirements and system design to ensure safe and reliable operation.
Does the WSH3-100 Isolator Switch provide overload protection?
No. The WSH3-100 Isolator Switch is not designed to provide overload or short-circuit protection. Its main function is to manually isolate the electrical circuit. Additional protective devices, such as MCBs or MCCBs, should be installed according to the application requirements.
Why use a 4-pole isolator switch instead of a 3-pole isolator?
A 4-pole isolator switch disconnects both the three-phase lines and the neutral conductor, while a 3-pole isolator only disconnects the three phases. A 4-pole design provides more complete isolation, especially in systems where neutral disconnection is required.
How is the WSH3-100 4P Isolator Switch installed?
The WSH3-100 4P Isolator Switch can be installed in compatible electrical enclosures or distribution systems according to the installation requirements. Proper wiring, mounting, and safety procedures should be followed during installation.
What standards does the WSH3-100 Isolator Switch comply with?
The WSH3-100 Isolator Switch is designed according to international low-voltage electrical equipment requirements. Compliance with relevant standards should be confirmed according to the specific product version and certification requirements for the target market.
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