4 Pole 100A Main Switch (WMS4100)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WMS4100 is a 4 pole 100A main switch designed for safe isolation in three-phase electrical systems. Part of the Whitecliffe WMS range, this device is a DIN rail mounted main switch / isolator for industrial and residential applications. The manufacturer lists the WMS4100 as a 4 pole 100A main...
The WMS4100 is a 4 pole 100A main switch designed for safe isolation in three-phase electrical systems.
Part of the Whitecliffe WMS range, this device is a DIN rail mounted main switch / isolator for industrial and residential applications. The manufacturer lists the WMS4100 as a 4 pole 100A main switch with a 230/400V AC rating and contact position indicator, making it a practical choice for compatible three-phase installations, boards, and enclosures.
The WMS range is available in double, three and four pole variants, with cable, U-type busbar and pin-type busbar connection options. For single-phase alternatives, see our main switches and isolators.
- 4 pole, 100A rated – suitable for three-phase isolation
- 230/400V AC – rated for 50/60Hz applications
- DIN rail mounting – mounts on 35mm DIN rail
- Contact position indicator – clear visual status indication
- Busbar compatible – cable, U-type and pin-type busbar connections
- Complies with IEC 60947-3 / EN 60947-3
- Dimensions: 70mm (W) x 82mm (H) x 70mm (D)
What is the WMS4100?
The WMS4100 is a 4 pole 100A main switch designed for isolation in three-phase electrical systems.
What voltage is it rated for?
The manufacturer lists the WMS4100 as rated for 230/400V AC at 50/60Hz.
How is the WMS4100 mounted?
It is designed for mounting on a standard 35mm DIN rail to EN 60715.
Can it be used with busbars?
Yes. The datasheet states compatibility with cable, U-type busbar, and pin-type busbar connections.
Does it have a position indicator?
Yes. The WMS range is listed with a contact position indicator.
What standards does it comply with?
The manufacturer states compliance with IEC 60947-3 and EN 60947-3.
- Product Code: WMS4100
- Type: Main switch / isolator
- Poles: 4 pole
- Rated Current (In): 100A
- Rated Voltage (Ue): 230/400V AC
- Frequency: 50/60Hz
- Insulation Voltage (Ui): 500V
- Rated Impulse Withstand Voltage (Uimp): 4000V
- Utilization Category: AC-22A
- Contact Position Indicator: Yes
- Protection Degree: IP20
- Electrical Life: 1500
- Mechanical Life: 8500
- Terminal Connection Type: Cable / U-type busbar / Pin-type busbar
- Terminal Size for Cable: 50mm² / 18-1/0 AWG
- Terminal Size for Busbar: 35mm² / 18-2 AWG
- Tightening Torque: 2.5 N·m
- Mounting: DIN rail EN 60715 (35mm)
- Connection: From top and bottom
- Ambient Temperature: -5°C to +40°C
- Storage Temperature: -25°C to +70°C
- Standards: IEC 60947-3 / EN 60947-3
- Dimensions (W x H x D): 70 x 82 x 70mm
This main switch should be installed by a qualified electrician in accordance with current wiring regulations and manufacturer guidance.
- Mount on a standard 35mm DIN rail to EN 60715
- Connections can be made from the top or bottom
- Suitable for cable, U-type busbar, and pin-type busbar arrangements
- Tighten terminals to the manufacturer’s stated torque of 2.5 N·m
- Check continuity, isolation, and correct switching operation after installation
