# CEEG KBSGZY 1250 kVA 10/1.14-0.66 kV Underground Mining Flameproof (Ex-Proof) Dry Transformer

> CEEG KBSGZY 1250 kVA 10/1.14-0.66 kV Underground Mining Flameproof (Ex-Proof) Dry Transformer belongs to the Mining & Flameproof (Ex-Proof) category and is rated at 1250 kVA with 10/1.14 kV primary/secondary voltage. Application: Underground Coal Mines with Methane & Coal Dust Explosion Risk. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-CEEG-KBSG-1250-10 | Brand: CEEG (China Electric Equipment Group) | Category: Power & Energy Equipment / Transformers / Special Industrial & Process Transformers / Mining & Flameproof (Ex-Proof)

**Voltformer canonical:** https://voltformer.com/product/ceeg-kbsgzy-1250-kva-10-1-14-0-66-kv-underground-mining-flameproof-ex-proof-dry-transformer - markdown version: https://voltformer.com/product/ceeg-kbsgzy-1250-kva-10-1-14-0-66-kv-underground-mining-flameproof-ex-proof-dry-transformer.md

## Overview

CEEG KBSGZY 1250 kVA 10/1.14-0.66 kV Underground Mining Flameproof (Ex-Proof) Dry Transformer is intended for Underground Coal Mines with Methane & Coal Dust Explosion Risk. Configured electrical data: 1250 kVA, 10/1.14 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn11 and short-circuit impedance 4.5%. Construction: Copper (Cu-Cu); cooling: AN (Flameproof Dry-Type); loss class: Mining Heavy Duty Flameproof Grade. 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:** Underground Coal Mines with Methane & Coal Dust Explosion Risk
- **Target industries:** Underground Coal & Metal Ore Mines, Tunnel Boring Machine (TBM) Projects
- **Brand:** [CEEG (China Electric Equipment Group)](https://voltformer.com/brand/ceeg-transformer.md) - Global pioneer in DuPont Nomex® insulated Class H and Class C (220°C) dry-type transformers; CEEG produces mining flameproof substations, amorphous-core dry-type and highly reliable oil power transfor
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [Special Industrial & Process Transformers](https://voltformer.com/category/special-industrial-process-transformers.md): Arc furnace (EAF), green hydrogen electrolyser, rectifier, traction and mining Ex-proof transformers. / [Mining & Flameproof (Ex-Proof)](https://voltformer.com/category/special-industrial-process-transformers/mining-flameproof-ex-proof-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 1250 kVA |
| Primary / secondary voltage | 10 kV / 1.14 kV (±2 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Dyn11 |
| Short-circuit impedance (Uk) | 4.5% |
| No-load loss P0 | 1.85 kW |
| Load loss Pk | 11.2 kW |
| Calculated efficiency (power factor = 1) | 98.97% at 100% load; 99.26% at 50% load |
| Loss class | Mining Heavy Duty Flameproof Grade |
| Windings | Copper (Cu-Cu) - cooling: AN (Flameproof Dry-Type) - insulation: Class H (180°C DuPont Nomex®) |
| Temperature rise | 100 K - sound pressure: 58 dB(A) |
| Mass and dimensions | 7800 kg - 3800×1350×1650 mm |
| Enclosure | IP54 / Ex-d I Mb mining Zırhlı - wheel gauge: 900 mm |
| LI / AC withstand | 75 kV peak / 28 kV rms - partial discharge: 5 pC |
| Environment | -40°C / +50°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Direct Copper Busbar Terminals (Busbar Integrated / IP00-IP31) |

## Standards

- IEC 60079-0
- IEC 60079-1
- GB 3836.1
- ATEX Ex-d I Mb

## Accessories

**Included:** Mining Rail Wheels, Built-in High Voltage Vacuum Breaker, Residual Current Relay
**Optional:** Remote SCADA Monitoring Module

## Official sources

- https://www.ceegtransformer.com/

- **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: $42,000 – $49,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60079-0, IEC 60079-1, GB 3836.1, ATEX Ex-d I Mb. 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-CEEG-KBSG-1250-10","quantity":1}]}
```

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