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ZGS-H-300/34.5-0.4
YAWEI
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>> Product Introduction
The ZGSL‑H‑3000‑23‑0.4 is a ground‑level, fully sealed pad‑mounted transformer built for underground utility distribution. Its lockable stainless steel cabinet sits on a concrete pad, eliminating the need for additional fencing—a key benefit for congested urban environments. Rated at 3000kVA, it converts 23kV primary to 0.4kV secondary, and comes with integrated low‑voltage switchgear for full secondary‑side protection. This unit is particularly well suited for commercial service drops and city grid expansions where space and safety are tight.
Product Advantage
1. Safety‑First Engineering
The enclosure meets IP68 ingress protection, keeping every live part fully isolated. It has successfully passed 10kV impulse tests with no partial discharge, giving it a clean bill for installation near schools, hospitals, and pedestrian zones. Over 150 such units are already in operation across sensitive public sites, with zero safety incidents recorded—proof of its dependable field performance.
2. Built to Last in Tough Conditions
Rugged construction shields the transformer from weather extremes, accidental impacts, and animal intrusion. The corrosion‑resistant housing and durable internal components contribute to an extended service life, ensuring steady power delivery even in coastal or industrial areas with high pollution levels.
3. Quick to Install, Easy to Service
Because the unit sits at ground level, installation only requires a flat concrete foundation and standard cable terminations. Routine checks and repairs are straightforward, cutting down on labour hours and outage periods. This accessibility translates directly into lower lifetime operating costs.
4. Tamper‑Resistant Design
The cabinet incorporates a heavy‑duty locking mechanism that deters unauthorised entry and deliberate interference. This extra layer of physical security is especially valuable in remote or high‑risk locations where vandalism or theft could otherwise compromise supply continuity.
>> Technical Parameters
| Type | Pad mounted transformer |
| Model | ZGSL-H-300/34.5-0.4 |
| Installation | Outdoor |
| Altitude | ≤1000m |
| Rated Power | 300KVA |
| Cooling Method | ONAN |
| Primary Voltage | 34.5kV |
| Secondary Voltage | 400V |
| Rated Frequency | 60HZ |
| Insulation oil | Mineral oil |
| Tapping Range | +2×2.5% |
| Temperature rise | 65℃ |
| Connection Group | Dyn1 |
>> Product Uses
Pad‑mounted transformers are self‑contained, ground‑level units designed for outdoor distribution networks where overhead lines aren't practical. Their versatility makes them a go‑to choice across multiple settings:
1. Underground Distribution Grids
They are extensively installed in residential neighbourhoods and commercial zones that rely on buried cable systems. These units step medium‑voltage inputs (typically 15 kV to 35 kV) down to standard utilisation levels like 120/240 V or 480 V for everyday consumption.
2. Commercial and Industrial Sites
Shopping centres, office towers, manufacturing plants, and data centres benefit from having a dedicated transformer close to the load. The compact, fenceless design saves valuable floor space while meeting strict safety and aesthetic requirements.
3. Housing Developments
New subdivisions increasingly adopt pad‑mounts as distribution hubs. They deliver steady power to individual homes with minimal visual intrusion and virtually silent operation – a significant plus for residential areas.
4. Renewable Energy Installations
Solar farms and wind projects use these transformers either to boost voltage for grid export or to reduce it for local microgrids. Their weather‑resistant enclosure adapts well to open field conditions.
5. Public Facilities and Infrastructure
Hospitals, educational campuses, airports, and municipal lighting systems rely on these units because they blend into urban landscapes without compromising reliability or safety.
6. Temporary or Emergency Power
Thanks to their modular build and quick‑hookup terminals, pad‑mounts are often brought in for construction trailers or storm‑recovery operations, providing fast, dependable service when permanent infrastructure is unavailable.
>> Product Operate Guide
Generic installation and use instructions for pad mounted transformer containing the following sections:
1. Shipment,handling, rigging & storage
2. Transformer installation: including crane lifting, rigging, Jack & skid, Foudation, Compartment, Grouding, High voltage and low voltage connections, dielectric fluid, transformer pressure, and other aspects
3.Pre-energization
4.Post-energization
5.Switching operation
6.Protection
7.Accessories
8.Maintance
9.Field acceptance test guidelines
10.Tables and procedures
Product Video
