Description
Schneider WB1KB124 Low-Consumption Contactor Coil
Product Overview
The Schneider Electric WB1KB124 is a replacement operating coil (type WB1-K) designed for heavy-duty bar contactors and magnetic latching contactors within the TeSys B range.
It powers the electromagnetic mechanism responsible for switching 1-pole through 4-pole high-capacity contactors (specifically compatible with LC1B and CR1B.32 / CR1B.33 / CR1B.34 frame sizes).
Technical Specifications
| Parameter | Specification Details |
|---|---|
| Product Model | WB1KB124 |
| Product Range | TeSys B / Bar Contactors |
| Product Type | Contactor Operating Coil (WB1-K) |
| Product Compatibility | TeSys B Contactors: LC1B (1P, 2P, 3P, 4P) and CR1B.32 / CR1B.33 / CR1B.34 |
| Control Circuit Type | AC / DC (Dual-rated control circuit) |
| Control Circuit Voltage (Uc) | • AC (50/60…400 Hz): 240 V AC nominal (Operating band: 157 V to 259 V AC)
• DC: 220 V DC nominal (Operating band: 109 V to 226 V DC) |
| Coil Resistance | 32.5Ω at 20 °C |
| Inrush Power Consumption | • 450–620 VA (1-Pole) | 720–1000 VA (2-Pole)
• 1100–1300 VA (3-Pole) | 1300–1600 VA (4-Pole) |
| Hold-in Power Consumption | • 0.15–0.2 VA (1-Pole) | 0.35–0.5 VA (2-Pole)
• 0.7–1.0 VA (3-Pole) | 1.2–1.6 VA (4-Pole) |
| Mechanical Durability | Up to 1,200,000 switching cycles |
| Net Weight | 1.12 kg (approx. 2.47 lbs) |
Key Advantages
- High Inrush & Low Hold-in Consumption: Designed to deliver strong electromagnetic force during contact closure, then drop to minimal power consumption during continuous hold-in.
- Wide Voltage & Frequency Tolerance: Supports broad control frequencies (50 Hz50 Hz50 Hz to 400 Hz400 Hz400 Hz) and functions reliably on both 240 V AC and 220 V DC systems.
- Heavy-Duty Mechanical Resilience: Built to withstand harsh industrial switching conditions with a mechanical life of up to 1.2 million operations.
- Direct OEM Replacement: Snaps directly into compatible TeSys B frame sizes (CR1B / LC1B) for maintenance and coil replacement without replacing the complete bar contactor assembly.
Important Usage & Installation Precautions
- Lifecycle & Commercialization Status: Schneider Electric has discontinued direct commercialization of this legacy part number (manufacturing managed by Lenoir Elec for legacy switchgear spares). Verify part authenticity and condition when sourcing from surplus or authorized distributors.
- Voltage Rating Verification: Confirm that your control circuit voltage matches 240 V AC or 220 V DC. Applying improper control voltages can lead to chatter, failure to pull in, or coil insulation burnout.
- Inrush Power Supply Sizing: Ensure the control transformer or control power supply can handle high peak inrush currents (up to 1600 VA on 4-pole contactors) during initial pull-in.
- Thermal Dissipation: Large bar contactor coils generate heat during operation (7 W7 W7 W up to 45 W45 W45 W depending on pole configuration). Maintain clean airflow within the switchboard enclosure.
- Safety Lockout: Disconnect all main power and auxiliary control circuits before accessing the contactor frame for coil replacement.
Applications
- Heavy Industrial Switchgear: Main operating component in high-amperage industrial power switching networks.
- Power Distribution & Transfer Switching: Used in automatic transfer switches (ATS) and main distribution panels where TeSys B CR1B/LC1B bar contactors are installed.
- Heavy Motor & Load Control: Drives high-power AC motors, electric heating banks, and large transformer switching circuits.
- Marine & Railway Power Systems: Compatible with high-frequency 400 Hz400 Hz400 Hz control supply networks commonly found in marine vessels, aviation ground support, and specialized transport equipment.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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