Mining Flameproof and Intrinsically Safe Low‑Voltage Vacuum Feeder Switch
Pedido mínimo: 1 Piezas
- Precio de referencia:
- USD $3100.00 - $8600.00
- Cantidad mínima de pedido:
- 1 Piezas
- Plazo de entrega:
- 7 días
- Capacidad de suministro:
- 5 Piezas por Semana
Características y aplicaciones del producto
Mining flameproof and intrinsically safe vacuum feeder switch (hereinafter referred to as the "feeder switch") is suitable for use in underground coal mines and other environments where explosive gases (methane mixtures) may be present in the surrounding atmosphere. It is designed for three‑phase power systems with a neutral point ungrounded, operating at AC 50Hz and voltages of 660V and 1140V. The protection device incorporates an advanced microprocessor, high‑precision data processing, and state‑of‑the‑art protection algorithms, offering advantages such as high protection accuracy and fast response. The feeder switch provides comprehensive protection functions including short‑circuit, overcurrent, overload, earth leakage protection, earth leakage lockout, undervoltage, overvoltage, three‑phase imbalance, gas protection, and wind‑power interlock. The product also features measurement capabilities for three‑phase AC voltage, AC current, zero‑sequence voltage, zero‑sequence current, three‑phase power, and electrical energy, as well as a remote earth leakage test function.
Product Features
(1) Intelligent Setting
The low‑voltage feeder switch is equipped with a low‑voltage intelligent protection device, featuring precise earth leakage protection to effectively prevent cascade tripping caused by earth leakage faults. In addition, with the integration of a smart setting system, it enables intelligent parameter setting — including one‑key setting, automatic rationality verification, and adaptive adjustment to load changes. This thoroughly solves the problem of parameter setting in coal mines, fully replacing the complex and tedious manual setting work of specialized personnel, ensuring settings are accurate and reasonable, and eliminating safety hazards caused by unscheduled or large‑scale power outages due to improper settings.
(2) Remote One‑Key Earth Leakage Test
The low‑voltage feeder switch features a remote one‑key earth leakage test function, which allows the test to be initiated via the remote monitoring system. The system automatically performs the earth leakage test, restores power automatically, and generates a test report upon completion. This eliminates the issues of "skipping tests" or "false testing" in remote leakage tests. Test personnel do not need to go underground, reducing labor intensity and improving test efficiency.
(3) Remote Intelligent Monitoring
Equipped with remote intelligent monitoring capabilities, including "four‑remote" functions (telemetry, remote signaling, remote control, and remote adjustment), it fills the gap in the intelligent construction of low‑voltage distribution equipment at mining power distribution points and working faces.
(4) Precision Metering
Real‑time monitoring of voltage, current, and power factor for each phase of three‑phase motors, with calculation of instantaneous and cumulative electrical energy consumption for optimized energy efficiency.
Product Parameters
| Model | Rated Voltage (V) | Rated Current (A) | Overall Dimensions (L×W×H) mm |
|---|---|---|---|
| QJZ‑200/1140(660) | 1140 (660) | 200 | — |
| QJZ‑300/1140(660) | 1140 (660) | 300 | — |
| QJZ‑400/1140(660) | 1140 (660) | 400 | — |
Operating Conditions
The equipment is designed for use under the following conditions:
a) Altitude not exceeding 2000m;
b) Ambient temperature: –5°C to +40°C;
c) Relative air humidity not exceeding 95% (at +25°C);
d) Atmospheric pressure: 80–110 kPa;
e) In hazardous locations with explosive gas mixtures of methane and coal dust;
f) In locations free from steam or corrosive gases that may damage metals and insulating materials;
g) In environments without significant swaying or severe impact vibrations;
h) In locations free from dripping water;
i) Installation inclination relative to the horizontal not exceeding 15°;
j) Pollution degree: Class 3;
k) Installation category: Category III.
Especificaciones comerciales
- Precio de referencia
- USD $3100.00 - $8600.00
- Cantidad mínima de pedido
- 1 Piezas
- Plazo de entrega
- 7 días
- Capacidad de suministro
- 5 Piezas por Semana
Shandong Shengyuan Industrial Equipment Co., Ltd.
Shandong Shengyuan Industrial Equipment Co., Ltd. (Shengyuan Industry), a subsidiary of China's Top 500 enterprise Shandong Ronghui Group, was founded in 1997 with a registered capital of 368.43 million RMB. Inheriting the Luoling Spirit, it commits to intelligent upgrading of mining machinery, focusing on the R&D and production of mining support equipment, lithium battery monorail hoists, hydraulic components and industrial fluid control devices, with five affiliated companies. As a national high-tech enterprise, national "Specialized, Refined, Differential and Innovative" Giant and Shandong Gazelle Enterprise, it runs six production bases with nearly 300 employees. Its average annual revenue growth reached 17.87% in recent two years, and the revenue hit 494 million RMB in 2025. Boasting 92 patents and over 100 technological achievements, many of its technologies are at the leading level at home and abroad. The company has invested nearly 25 million RMB in R&D and plans a high-end equipment manufacturing project with a total investment of 2.9 billion RMB.
- Ubicación
- No. 1 Hengfa Road, Beisu Town, Zoucheng City, Jining City, Shandong Province
- Empleados
- 101-500 People
- Área de fábrica
- > 50,000 m²
- Ingresos anuales
- Above US$50 Million
- Mercados principales
- Southeast Asia / Middle East & North Africa