This document is an equipment handbook for the Low Voltage Disconnectors series LVD300, LVD400, LVD500, LVD600, and LVD1000. The document includes safety instructions, specifications, circuit description, controls and indicators, installation and commissioning, routine maintenance, fault diagnosis and repair.
This handbook covers five variants of APC low‑voltage disconnectors (LVD300, LVD400, LVD500, LVD600, LVD1000). It includes safety instructions, detailed specifications, circuit description, control and indicator information, installation and commissioning procedures, routine maintenance, fault diagnosis, and handling guidelines.
Key specifications include a -54.5 V dc nominal input and output, dimensions of 366 mm × 193 mm × 470 mm, weight of 15 kg, operating temperature from –5 °C to +50 °C, and humidity range of 5 % to 95 % non‑condensing. The units meet BS EN 60950 safety standards and feature fuse ratings that vary by model.
| Input voltage | -54.5 V dc nominal |
|---|---|
| Output voltage | -54.5 V dc nominal |
| Dimensions | 366 mm wide × 193 mm deep × 470 mm high |
| Weight | 15 kg |
| Operational temperature | -5 °C to +50 °C |
| Operational humidity | 5 % to 95 % non‑condensing |
| Safety standard | BS EN 60950 |
The contactor de‑energises when the input voltage decreases to 42.5 V.
By setting the keyswitch to the OPEN position, which de‑energises the contactor regardless of input voltage.
The LVD500 variant uses a 500 A fuse (FS1).
They are designed to meet the BS EN 60950 safety specification for information technology equipment.