LV Assemblies
XL-21 Power Distribution Cabinet
Indoor AC power distribution cabinet for systems up to 500V, wall-mounted, front maintenance.
XL-21 is an indoor AC power distribution cabinet for three-phase four-wire / five-wire systems up to 500V. Its closed steel structure mounts a disconnect switch handle on the front right column and houses voltmeters, MCCBs, fuses, contactors and thermal relays for plant power distribution.
Key Technical Parameters
| Rated voltage | AC up to 500 V (3-phase 4/5-wire) |
|---|---|
| Rated frequency | 50 Hz |
| Enclosure | closed steel structure, wall-mounted (front maintenance) |
| Ambient temperature | -50 °C to +40 °C (24h avg ≤ +36 °C) |
| Altitude | up to 2000 m |
| Standards | IEC 61439, GB/T 7251.1-2023 |
Structure & Features
- Disconnect-switch handle on front right column; voltmeters, MCCB, fuse, contactor, thermal relay inside.
- Configuration follows the primary single-line diagram.
Application Scenarios
- Plant power distribution rooms, pump stations and building mains.
Model Designation & Variants
- X = distribution box; L = power; 21 = design series.