[ AUTOMATIC TRANSFER SWITCHES // MODEL RECORD ]
Tripp Lite PDUMH20ATNET Automatic Transfer Switch PDU
Network-managed rack PDU with dual-source automatic transfer for 120 V equipment. The specifications below are for this named model and region only; verify the complete product label and matching manual before deployment or service.
ARCHIVAL IDENTIFICATION: Preserve the complete SKU, suffix, region, date code, revision, installed battery part (if present), firmware and physical condition. Similar model names do not establish hardware equivalence.
Specifications, conditions & service
| Catalog subcategory | Automatic transfer switches |
|---|---|
| Topology / power path | Automatic transfer switch (ATS) PDU: transfers a compatible single-cord load between primary and secondary inputs when the preferred source is unacceptable. Not a UPS; transfer does not create energy. |
| Ratings / output configuration | 120 V, 20 A nominal input class; output is agency/branch derated in some installations (commonly 16 A / 1.9 kW). Use nameplate/manual rating and local code. Sixteen NEMA 5-15/20R outlets on the documented model. Two input feeds/cords; connector arrangements vary with supplied cord/accessories. |
| Battery / replaceability | No battery. |
| Runtime / limits and conditions | No stored runtime. Transfer is millisecond-scale per the manufacturer description; downstream hold-up depends on equipment power-supply ride-through and source quality, not an internal battery. |
| Interfaces / monitoring | Network management for monitoring and outlet switching; web/SNMP access depends on firmware. Local status/metering shows source/load condition. |
| Safety / installation caveats | Both feeds must be compatible, correctly grounded AC sources. ATS cannot correct bad voltage/frequency or make unsafe sources suitable; source-phase/voltage compatibility and load-circuit ratings must be verified. |
| Model variants / revision checks | Exact input plug/cord and rear panel may differ by kit/revision. Some regional product bundles include different secondary cord or adapters; use the PDUMH20ATNET manual/nameplate. |
Field service / archive notes
- Record labels and connector layout before installation; document load, input conditions, measured behavior and test date separately from manufacturer-rated values.
- Never open energized mains equipment. Battery devices can retain dangerous voltage or high fault current; follow the manufacturer’s replacement and recycling procedure.
- Inspect enclosure, cord, plugs, grounding, indicators, alarms and battery condition. Quarantine damaged, swollen, leaking or heat-affected equipment.
- Network-management appliances should be isolated, updated where supported and configured with non-default credentials; do not expose legacy management interfaces directly to the public internet.
Manufacturer references
- Manufacturer product listing — Tripp Lite PDUMH20ATNET Automatic Transfer Switch PDUModel identity and product-family specification reference. Confirm exact regional SKU against the chassis label.
- Manufacturer manual / support documentationConsult the version matching the exact SKU. Runtime references are load- and condition-dependent estimates where supplied, never a guarantee for a particular aged unit. Original page is gone; this is the Internet Archive’s copy.