175 kVA Transformer

175 kVA Configurations

The installation site decides the construction and the connection:

175 kVA Transformer Specification (Typical)

175 kVA Transformer Amps and Current Rating

175 kVA transformer amps depend on the voltage at each winding. On a 400V secondary the full-load current is about 253 A per phase; at 415V it is about 244 A; at 480V about 211 A; and on a 240V single-phase-derived system it rises to about 421 A. On the primary side the current is much smaller: about 9.2 A at 11 kV, 5.1 A at 20 kV and 3.1 A at 33 kV.

The secondary current is what sizes the cables or busbar and the outgoing protection, so it is worth stating the exact secondary voltage when ordering – a 400V and a 415V winding give different current ratings for the same kVA. For planning, the shortcut is that three-phase current equals kVA × 1,000 divided by (1.732 × voltage); for a 175 kVA unit that is about 1.44 A per kVA at 400V.

175 kVA full-load current by voltage

175 kVA Transformer Size, Dimensions and Weight

Searches for size 175 kVA transformer, dimensions 175 kVA transformer or 175 kVA transformer weight all come down to the same four numbers: length, width, height and weight. A 175 kVA transformer size depends on construction and voltage class, but oil-immersed units in this range are compact enough for pole or plinth mounting. The questions we are asked most about this rating are the 175 kVA transformer amps, the 175 kVA transformer weight and the 175 kVA transformer dimensions, so all three are covered here with figures you can use for planning. As a reference point from our own production, a 100 kVA oil-immersed unit measures about 1,000-1,200 mm long, 500-700 mm deep and 1,100-1,400 mm high and weighs 600-900 kg; a 175 kVA unit scales to roughly 1,300-1,600 mm long, 700-900 mm wide and 1,300-1,700 mm high, with a weight of about 1,000-1,200 kg.

175 kVA transformer weight is dominated by the core, windings and oil: the oil charge for this rating is typically 150-200 litres, and the transport weight includes the tank, radiators and fittings. Dry-type units are heavier in the active part but lighter overall because there is no oil or tank – and they need clearances for air circulation instead of a bunded oil containment area. Confirm the final dimensions and weight on the approval drawing before arranging lifting or pole hardware.

Indicative 175 kVA dimensions and weight (confirm on drawings)

175 kVA Transformer Price, Sale and Budget Planning

The 175 kVA transformer price is driven by voltage class, loss level, winding material and the accessory package rather than by the kVA figure alone. As a planning range, a standard oil-immersed 11kV/0.4kV 175 kVA unit with copper windings and routine test documentation typically falls in the region of USD 3,000-8,000 ex-works; a dry-type or low-loss version, a 33kV primary or a unit with extra protection and metering moves toward the upper end.

If you are looking for a 175 kVA transformer for sale within a fixed budget, the practical news is that this rating sits well inside the common capital budget for distribution equipment – a requirement of a 175 kVA transformer under $20,000 can cover a fully specified oil-immersed unit with test reports, export packing and freight to most destinations. To buy a 175 kVA transformer with an accurate price, send the primary and secondary voltage, connection group, loss level, mounting arrangement and destination port, and we will issue a written quotation against that specification.

What moves the 175 kVA price

New, Used and Replacement 175 kVA Transformers

Most 175 kVA enquiries fall into one of three situations: a new installation, a like-for-like replacement, or an urgent swap after a failure. Whether you searched for a “price 175 kVA transformer” quote, a “175 kVA transformer sale” listing, a “nearby 175 kVA transformer” or a “replacement 175 kVA transformer”, the data that decides the answer is the same: nameplate rating, primary and secondary voltage, connection group, impedance and tap range. For a replacement unit the fastest route is to match the existing nameplate data, because the cables, protection settings and mounting hardware are already built around those values, and a new 175 kVA transformer built to the same data drops into the installation with no re-engineering.

A used 175 kVA transformer is worth considering only with a documented history: oil test results (dielectric strength and moisture), winding resistance and ratio measurements, and a record of the loading it has seen. Without those, the saving is usually smaller than the risk, because a failed unit costs more in downtime than the price difference. If you need a 175 kVA transformer nearby, ask about ex-stock availability and lead time: standard ratings can often ship from stock in weeks, while a project rating such as 175 kVA is normally built to order, and we will confirm the production slot with the quotation.

Choosing between new, used and rebuilt

Distribution, Isolation and 3-Phase Duty

A distribution transformer 175 kVA unit is the standard duty, stepping the network voltage down for a load area or a single customer. An isolation transformer 175 kVA serves a different purpose: a 175 kVA isolation transformer provides galvanic separation between primary and secondary for safety, noise or harmonic reasons, and it may be specified as 1:1 ratio rather than as a step-down. Isolation units are common in medical, marine, data-centre and workshop applications. In North American catalogues this equipment is classified under voltage transformers & regulators, 175 kVA transformer ratings included; the underlying hardware is the same oil-immersed or dry-type construction, but the specification emphasis shifts to shielding, electrostatic screens and insulation level, so always state the application when you enquire.

A 175 kVA 3 phase transformer is the normal configuration for this rating, since three-phase supply is what industrial, commercial and mixed residential networks use – single-phase units are built mainly in the smaller rural sizes.

Duty types at 175 kVA

Colour, Finish and Enclosure Options

Transformer colour is usually a specification line rather than a stock feature, and the common requests map directly to RAL numbers: a gray 175 kVA transformer is normally RAL 7035 (light grey) or RAL 7032 (pebble grey), a black 175 kVA transformer is RAL 9005, and a white 175 kVA transformer is RAL 9010. A silver 175 kVA transformer usually means a galvanised or aluminium-finish tank, while a bronze 175 kVA transformer is a bronze-toned paint or a weathered-copper aesthetic used on installations where the equipment is visible to the public.

Finish matters beyond appearance: the tank is shot-blasted and primed before topcoat, and for coastal or high-humidity sites a heavier paint system or hot-dip galvanised fittings extend service life. Colour and finish are agreed at order stage at no extra engineering cost on a factory-direct build, so specify the RAL reference and the environment (indoor, outdoor, coastal, industrial) rather than relying on a colour name alone.

Common colour and finish requests

How to Size a Transformer: Calculating kVA

How to calculate kVA of a transformer from a known load is a two-step sum: add the connected loads in kW, divide by the power factor to convert to kVA, then add a margin for future growth. A load of 130 kW at 0.85 power factor needs about 153 kVA, so the next size up – here a 175 kVA transformer – leaves a sensible margin without paying for capacity the site will not use. For motor loads, add the starting duty and check the voltage dip during direct-on-line starts.

On how to size a transformer kVA for a replacement, the reverse also applies: read the nameplate kVA, then verify the actual maximum demand against it. Oversized units run at low load and lose efficiency, while undersized units overheat. As a comparison point, the standard steps around this rating are 125 kVA, 150 kVA and 200 kVA – a 150 kVA transformer dimensions are close to the 175 kVA figures above, so a size change usually fits the same plinth. For much larger projects, our range extends to 2,500 kVA and separate power transformer pages cover higher ratings and the 1750 kVA transformer price bracket.

Standard steps around 175 kVA (400V secondary current)

175 kVA Transformers and Generator Sets

A large share of 175 kVA searches come from generator applications rather than network distribution, so it is worth separating the two. When an enquiry starts as a diesel 175 kVA transformer search, it usually turns out to be a generating set requirement: a 175 kVA diesel generator is a common size (roughly 140 kW at 0.8 power factor), and a transformer is frequently bought alongside it to step the generator voltage up to a distribution level or down to a site voltage. If you are matching generators, 175 kVA transformer selection starts with the generator kVA and its voltage so the ratio, impedance and protection are coordinated.

Two related terms are often confused with a 175 kVA transformer. First, a portable 175 kVA transformer: a 175 kVA oil-immersed unit weighs around a tonne and is a fixed installation, so genuinely portable duty is served by a compact dry-type unit or a mobile substation rather than by a standard distribution transformer. Second, a 175 a rating kva transformer entry on a drawing: 175 A is a current, not a capacity – at 400V, 175 A corresponds to about 121 kVA, while a 175 kVA unit carries about 253 A at 400V. The same applies to a 15 a rating 175 kva transformer call-out, which is a protection or metering figure rather than a transformer size – size the unit from the kVA or kW demand, not from the current figure alone.

Don’t mix up these ratings