# Dachi Electric 31.5 MVA 110/34.5 kV Truck-Trailer Complete Mobile Substation

> Dachi Electric 31.5 MVA 110/34.5 kV Truck-Trailer Complete Mobile Substation belongs to the Mobile Emergency Substations category and is rated at 31.5 MVA with 110/34.5 kV primary/secondary voltage. Application: Emergency Disaster Power & Grid Bypass During Maintenance. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-DCH-MOB-31M-110K | Brand: Shandong Dachi Electric (Dachi Group) | Category: Power & Energy Equipment / Transformers / Compact Substations, Kiosks & Pad-Mounted / Mobile Emergency Substations

**Voltformer canonical:** https://voltformer.com/product/dachi-electric-31-5-mva-110-34-5-kv-truck-trailer-complete-mobile-substation - markdown version: https://voltformer.com/product/dachi-electric-31-5-mva-110-34-5-kv-truck-trailer-complete-mobile-substation.md

## Overview

Dachi Electric 31.5 MVA 110/34.5 kV Truck-Trailer Complete Mobile Substation is intended for Emergency Disaster Power & Grid Bypass During Maintenance. Configured electrical data: 31.5 MVA, 110/34.5 kV primary/secondary voltage, 50 Hz, 3-phase, vector group YNd11 and short-circuit impedance 10.5%. Construction: Copper (Cu-Cu); cooling: ODAF (Enhanced Compact Cooling); loss class: Mobile Substation Standard. These values support preliminary engineering selection; verify insulation levels, thermal limits, short-circuit duty, installation conditions and applicable standards against the manufacturer datasheet and the site study.

- **Application:** Emergency Disaster Power & Grid Bypass During Maintenance
- **Target industries:** Disaster & Emergency Management, Mining Fields & Operations, Temporary Construction Sites
- **Brand:** [Shandong Dachi Electric (Dachi Group)](https://voltformer.com/brand/dachi-electric.md) - One of China's largest transformer industrial complexes with 80 million kVA annual capacity; Shandong Dachi Electric produces 500 kV and 220 kV large on-load tap-changing split power transformers and
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [Compact Substations, Kiosks & Pad-Mounted](https://voltformer.com/category/compact-substations-and-padmounted.md): Monolithic concrete kiosks, pad-mounted outdoor transformers and mobile emergency substations. / [Mobile Emergency Substations](https://voltformer.com/category/compact-substations-and-padmounted/mobile-emergency-substations.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 31.5 MVA |
| Primary / secondary voltage | 110 kV / 34.5 kV (±8 x 1.25% OLTC) |
| Frequency / phases | 50 Hz / 3-phase - YNd11 |
| Short-circuit impedance (Uk) | 10.5% |
| No-load loss P0 | 17.50 kW |
| Load loss Pk | 125.0 kW |
| Calculated efficiency (power factor = 1) | 99.55% at 100% load; 99.69% at 50% load |
| Loss class | Mobile Substation Standard |
| Windings | Copper (Cu-Cu) - cooling: ODAF (Enhanced Compact Cooling) - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 64 dB(A) |
| Mass and dimensions | 64000 kg - 13800×2750×4150 mm |
| Enclosure | Configuration-specific ingress protection - wheel gauge: 2200 mm |
| LI / AC withstand | 550 kV peak / 230 kV rms - partial discharge: 20 pC |
| Environment | -25°C / +40°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Dead-Front 600A / 200A Load Break Switch Bushing |

## Standards

- IEC 60076
- IEC 62271-200
- IEEE C57.12.00

## Accessories

**Included:** 110 kV H-GIS Gas-Insulated Cell, 36 kV Output Switchboard, Hydraulic Carrier Trailer
**Optional:** Diesel Generator

## Official sources

- https://www.chinadachi.com/en/index.html

- **Source scope:** manufacturer-family
- **Last reviewed:** 2026-09-13

Manufacturer portfolio/family source. Confirm the exact order code, guaranteed ratings and project-specific options against the current OEM datasheet before procurement or an SLD study.

## Pricing & Logistics

- Pricing type: RFQ (Project Engineering) - Indicative range: $650,000 – $780,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076, IEC 62271-200, IEEE C57.12.00. Verify applicability and conformity against the exact offered model and project jurisdiction.

## RFQ

Request a formal factory quotation via Voltformer RFQ:

```json
POST https://voltformer.com/api/v1/rfq
{"companyName":"Example Energy","email":"procurement@example.com","items":[{"skuOrId":"VF-DCH-MOB-31M-110K","quantity":1}]}
```

Full catalog JSON: https://voltformer.com/agent-catalog.json - OpenAPI: https://voltformer.com/openapi.json