Low-Consumption Grid Power Transformer

Model Number:S20-3150-Nx2
Rated Volume Quantity:3150KVA
High Voltage:35KV
Low Voltage:3.15KV/6.3KV/10.5KV
No-Load Loss:1920W
Load Loss:18400W
No-load electricity:0.45%
Short circuit resistance:7%

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Product Introduction

Products Description

Enhanced Version for Voltage Fluctuations in Rural Power Grids

Capable of continuous operation under ±20% voltage deviation (in accordance with rural power grid provisions in GB/T 12325).
Lightning-resistant design (withstands 100 kA, 10/350 μs waveform, as per GB/T 21714.1).
Rodent- and ant-proof structure (epoxy resin sealing at the bottom of the cabinet + stainless-steel protective mesh).

Enhanced Explosion-Proof Structure for Mining Use

Flameproof pressure relief valve (certified as Ex d I Mb / GB 3836.2).
Cabinet design with a dust deposition angle ≤ 30° (in accordance with ISO 6184 explosion-proof standard).
Impact-resistant terminal box (protection class IK10 / EN 62262).

Rapid Switching for Emergency Power Generation

Grid-connection switching for diesel generators completed within 0.5 s (enabled by harmonic suppression per GB/T 14549).
Voltage recovery after sudden load shedding < 3% (tested using 100%→0% step change).
Equipped with pre-magnetization windings (inrush current during no-load closing < 1.2 times the rated current).

Long-Acting Moisture-Proof Sealing System

Double-layer silicone rubber gaskets (at tank rim and bushing interfaces).
Nitrogen micro–positive-pressure system (moisture intrusion rate < 0.2% per year).
Certified to IEC 60076-14 L1 sealing class.
Suitable for ≤ 98% RH (non-condensing conditions).

Products Parameters

Model number	S20-3150-N×2
Rated volume quantity(KVA)	3150
High voltage(KV)	35/38.5
High voltage tap range(KV)	±5% or ±2 × 2.5%
Low voltage(KV)	3.15/6.3/10.5
Connection group label	yd11
No-load loss(W)	1920
Load loss(W)	18400
No-load electricity(%)	0.45
Short circuit resistance(%)	7

Products Description

Our factory & quipment

Our transformer production combines automated equipment with the exquisite craftsmanship of experienced technicians. From winding and assembly to insulation treatment, every process is strictly controlled by a skilled technical team.

The workshop maintains constant temperature and humidity, in compliance with ISO 9001 international quality management standards, ensuring that product performance remains stable, safe, and durable.

Production processes are transparent and fully visualized. We are committed to leveraging technology to improve efficiency and deliver zero-defect industrial power solutions to our customers.