DT-3000VA auto transformer step up and step down

Описание

DT-3000VA autotransformer step up and step down

• Output socket on the case — standard matched to the destination market
• Ручка для переноски
• Input voltage selector for 110V, 120V, 220V and 240V supplies
• Переключатель ВКЛ/ВЫКЛ
• Fuse and MCB protection
• One year warranty from the delivery date

Функции

• Provides bidirectional conversion between 110V and 220V class supplies from one unit.
• The input tap is selected to suit the grid at the point of use.
• Standard selector positions 110V–120V–220V–240V; other voltages can be wound on request.
• Output delivered at 110/120V or 220/240V according to the selected direction.
• Applied to test rigs, small production machinery and imported equipment brought on site.

Технические характеристики

Rated capacity: 3000VA, single phase

Primary voltage: 110–120VAC / 220–240VAC with front-panel selection

Secondary voltage: 220–240VAC / 110–120VAC

Custom voltages: available on request for both windings

Transformer type: isolating step up & down transformer / voltage converter

Connection: plug and cord or fixed terminal

On-board socket: yes

Эффективность: 80%

Supply frequency: 50/60 Гц

Operating ambient: 0°C to +40°C

Protection: fuse and MCB, circuit breaker

OEM / ODM: accepted with MOQ

Spare parts: by discussion

Warranty: 12 months

■ How to Choose This Transformer

Work out the continuous load first and the surge second. For a mixed panel on a 3KVA frame the safe working figure is about 1,800W of resistive or electronic load, roughly 1,000W of pump and fan load, and only 400–600W of compressor load once start-up current is allowed for. If the arithmetic sits close to the boundary, take the larger frame: running a transformer at 60 % of rating keeps the winding cooler, reduces acoustic noise and extends service life at very little extra cost.

Three practical points to confirm:

• the measured supply voltage and the direction of conversion required;
• the socket standard for your market;
• how much clearance the installation allows, since the frame needs 10cm of free air on every face.

■ Mounting, Testing and Traceability

Although a carrying handle is fitted, most 3KVA units end up installed rather than moved. Keep the case out of closed cabinets, avoid mounting it on a lightweight partition that would act as a sounding board, and terminate the primary through an isolator so the unit can be locked off for service. Every unit is dielectric-tested and then run at rated load, with winding resistance, no-load current and output voltage recorded against the production batch and kept for twelve months.

The 3000VA frame is also the smallest in the range that is regularly supplied with a terminal-block input rather than a cord set. That makes it the entry point for installations where the transformer is wired into a panel and switched from an isolator rather than from its own front-panel switch.

For fixed installations, terminate the primary through a dedicated isolator and record the serial number on the panel schedule. Test records are filed against that number, so a later query can be traced without opening the enclosure.

■ Pricing, Ordering & Quality Assurance

Step Up & Step Down Transformer Price Range (100VA–10KVA)

Pricing for the DT/ST series depends on capacity, the input/output voltage combination you need, socket type, and whether a voltage selector or MCB protection is fitted. The table below gives indicative FOB levels so you can budget before requesting a firm quotation.

* Indicative FOB Ningbo/Shanghai, standard configuration, based on 50 pcs per size. Not a formal offer — final price depends on your voltage combination, socket standard, enclosure and order quantity.

1. The efficiency of the DT/ST series is 80%. For equipment with motors or compressors, the starting current will multiply — always reserve adequate power margin.
2. Pure resistive / electronic loads: choose a transformer with capacity ≥ 1.5× the equipment rated power.
3. Inductive loads such as motors and compressors: choose a transformer with capacity ≥ 2.5–3× the equipment rated power.
4. This table is for reference only. Confirm the final solution according to the rated power and duty cycle shown on your equipment nameplate.

MOQ, Lead Time & Ordering Information

Certifications & Quality Assurance

DT/ST series step up and step down transformers are produced under our ISO 9001 quality management system, and every unit is 100% function-tested before packing.

CE Certified  |  RoHS Compliant  |  IEC Tested  |  ISO 9001  |  EMC Tested  |  12-Month Warranty

Certificates and routine test reports can be issued as PDF on request, for customs clearance, tender submissions or distributor onboarding.

■ FAQ

What does the DT-3000VA model designation mean?

The DT-3000VA is a single-phase, double-wound isolating transformer rated at three kilovolt-amperes, produced on the same platform as the rest of the DT and ST range. “DT” denotes the units catalogued for step-up duty, the figure is the volt-ampere rating, and the frame is bidirectional in practice — the input selector decides which way the conversion runs on any given site.

Can I buy a 220V to 110V transformer 3000W as an ODM build?

Yes. A 220V to 110V transformer 3000W can be produced with a fixed ratio rather than a selector, a non-standard socket, a resettable breaker instead of a fuse, or a branded enclosure. Fifty pieces is the minimum for a custom configuration, and a sample unit is supplied for approval before the production batch is wound. Standard catalogue versions ship in 10–20 working days.

Is a DT-3000VA auto transformer step up and step down enough for a compressor?

Only a small one. On this frame the compressor ceiling is roughly 500–600W of running load once the surge factor is applied, because a compressor can draw up to five times its running current on every start. If the compressor nameplate is above 600W, move to the 5000VA frame. For resistive and electronic loads the same frame carries approximately 1,800W.

How should the unit be installed?

Place it on a hard, level surface with at least 10cm of free air on every face and keep it out of closed cabinets, since the laminated core dissipates heat continuously even at part load. This is the smallest rating in the range that is regularly supplied with a terminal-block input, which makes it the usual entry point for installations where the transformer is wired into a panel and switched from an isolator upstream.

What documentation comes with the shipment?

Each unit is dielectric-tested and then run at rated load, with winding resistance, no-load current and output voltage recorded against the production batch and retained for twelve months. Shipments include a packing list and routine test report, and CE, RoHS and ISO 9001 certificates can be issued as PDF for customs clearance or tender submissions.

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