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【案例CASE】：吴忠市|Legrand 罗格朗 单相安全变压器 044211,40VA

▊ 概要

高思（GAOSSI^®）专业供应法国罗格朗（Legrand）品牌控制与信号变压器（control, signalling and safety isolation transformers open type single phase）0442系列044211（40VA, 230~400V ac输入,24V ac输出）等产品，应用在汽车、光伏、机床、冲床/压力机、车辆、钢铁、建筑、机械设备、电气设备、电子、通讯、医疗器械等行业。

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▊ 属性

品名 NAME	型号 TYPE	系列 SERIES
控制与信号变压器（control, signalling and safety isolation transformers open type single phase）	044211	0442系列
品牌 BRAND	系别 COUNTRY	产地 ORIGIN
罗格朗（Legrand）	法国	法国

▊ 客户

宁夏吴忠市某客户

▊ 实图

图1 LEGRAND罗格朗 单相安全变压器 044211出货实物图

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一、客户背景​

宁夏吴忠市某塑料制品制造有限公司在注塑生产线智能化改造项目中，需为注塑机温控模块、模具位置传感器、小型气动执行器及 PLC 辅助控制单元提供安全稳定的低压供电。车间存在新旧设备混合使用导致的电压差异（老旧注塑机 230V 供电，新智能设备适配 400V），塑料熔融加工过程中产生的粉尘易侵入设备，且温控模块对电磁干扰敏感，需一款兼具电气隔离、轻负载适配、防尘防护的紧凑型供电解决方案，保障生产过程的温度精度与设备稳定性。​

Customer Background​

A plastic products manufacturing Co., Ltd. in Wuzhong, Ningxia required a safe and stable low-voltage power supply for injection molding machine temperature control modules, mold position sensors, small pneumatic actuators, and PLC auxiliary control units in its intelligent transformation project of injection molding production lines. Due to the voltage difference caused by mixed use of new and old equipment in the workshop (230V for old injection molding machines and 400V for new intelligent equipment), plastic dust generated during melting processing is prone to invading equipment, and temperature control modules are sensitive to electromagnetic interference. A compact power supply solution with electrical isolation, light load adaptation, and dustproof protection was needed to ensure temperature accuracy and equipment stability during production.​

二、产品选型​

客户选用 Legrand 罗格朗单相安全隔离变压器 044211，额定视在功率 40VA，精准匹配轻负载控制设备的供电需求；其 6 档宽范围初级电压（215V/230V/245V/385V/400V/415V）可灵活兼容车间混合电压环境，次级稳定输出 24V 安全电压。产品核心优势在于兼具安全变压器与隔离变压器双重属性，能有效阻断电磁干扰与漏电风险；采用 IEC 85 标准 B 级绝缘材料、IP2X 防尘防护及 IK04 抗冲击设计，可抵御塑料粉尘侵入与车间轻微碰撞；模块化紧凑结构（94×78×113mm）+ 螺钉端子连接，满足注塑机控制柜狭小空间安装需求，接线便捷且牢固，完全契合塑料制品行业轻负载、高安全、易集成的核心诉求。​

Product Selection​

The customer selected the Legrand single-phase safety isolation transformer 044211 with a rated apparent power of 40VA, which accurately matches the power supply needs of light-load control equipment. Its 6-range wide primary voltage (215V/230V/245V/385V/400V/415V) can flexibly adapt to the mixed voltage environment of the workshop, and the secondary side stably outputs 24V safety voltage. The core advantage of the product lies in its dual attributes of safety transformer and isolation transformer, which can effectively block electromagnetic interference and electric leakage risks. Adopting Class B insulation material compliant with IEC 85, IP2X dustproof protection, and IK04 impact resistance design, it can resist plastic dust intrusion and slight collisions in the workshop. The modular compact structure (94×78×113mm) combined with screwed terminal connection meets the installation requirements of narrow spaces in injection molding machine control cabinets, enabling convenient and firm wiring, which fully aligns with the core demands of light load, high safety, and easy integration in the plastic products industry.​

三、应用效果​

该变压器成功集成于 20 台注塑机的控制柜内，通过多电压档位快速适配新旧设备供电规格，无需额外配置电压转换器，显著缩短了改造周期。双重隔离设计有效隔绝了电网波动与设备间的电磁干扰，使温控模块的温度控制精度从 ±1℃提升至 ±0.3℃，确保塑料制品成型质量均匀；IP2X 防护等级成功阻挡塑料粉尘进入设备内部，螺钉端子的防松动设计保障了连续生产中的接线稳定性。设备运行至今零故障，24V 安全电压为操作人员提供了可靠防护，生产线因供电问题导致的停机时间减少 50%，产品不良率下降 2.5%，大幅提升了企业的生产效率与成本控制能力。​

Application Performance​

The transformer was successfully integrated into the control cabinets of 20 injection molding machines. Its multi-voltage range design quickly adapted to the power supply specifications of new and old equipment without the need for additional voltage conversion devices, significantly shortening the transformation cycle. The dual isolation design effectively isolated power grid fluctuations and electromagnetic interference between equipment, improving the temperature control accuracy of the temperature control module from ±1℃ to ±0.3℃, ensuring uniform molding quality of plastic products. The IP2X protection class successfully blocked plastic dust from entering the equipment, and the anti-loosening design of screwed terminals guaranteed wiring stability during continuous production. The equipment has achieved zero failures since operation, and the 24V safety voltage provided reliable protection for operators. The downtime of the production line caused by power supply problems was reduced by 50%, and the product defect rate decreased by 2.5%, greatly improving the enterprise’s production efficiency and cost control capabilities.​

四、典型优势​

– 40VA 额定视在功率，精准匹配塑料制品生产线轻负载控制设备需求​

– 安全 + 隔离双重属性，阻断电磁干扰与漏电风险，保障人机安全​

– 6 档宽幅电压适配（215-415V），兼容新旧设备混合供电场景​

– 94×78×113mm 超紧凑尺寸，适配注塑机控制柜狭小安装空间​

– B 级绝缘 + IP2X 防尘 + IK04 抗冲击，适配塑料粉尘复杂工况​

– 螺钉端子 + 清晰标记，安装维护便捷，降低生产停机风险​

Key Advantages​

– 40VA rated apparent power, accurately matching the needs of light-load control equipment in plastic products production lines​

– Dual attributes of safety and isolation, blocking electromagnetic interference and electric leakage risks, ensuring human-machine safety​

– 6-range wide voltage adaptability (215-415V), compatible with mixed power supply scenarios of new and old equipment​

– Ultra-compact size of 94×78×113mm, suitable for narrow installation spaces in injection molding machine control cabinets​

– Class B insulation + IP2X dustproof + IK04 impact resistance, adapting to complex working conditions of plastic dust​

– Screwed terminals + clear markings, convenient installation and maintenance, reducing production downtime risks​

五、总结​

Legrand 罗格朗 044211 单相安全隔离变压器在宁夏吴忠市某塑料制品企业注塑生产线的成功应用，精准解决了轻负载供电、混合电压适配、电磁干扰及粉尘防护等行业痛点。其双重安全隔离设计、轻负载精准匹配能力与紧凑集成特性，不仅保障了注塑生产过程的稳定性与产品质量，更助力企业以高性价比完成智能化改造，为塑料制品行业的绿色高效生产提供了可靠的供电支撑。​

Conclusion​

The successful application of the Legrand 044211 single-phase safety isolation transformer in the injection molding production line of a plastic products enterprise in Wuzhong, Ningxia has accurately solved industry pain points such as light-load power supply, mixed voltage adaptation, electromagnetic interference, and dust protection. Its dual safety isolation design, light-load accurate matching capability, and compact integration characteristics not only ensure the stability of the injection molding production process and product quality but also help the enterprise complete intelligent transformation with high cost performance, providing reliable power supply support for green and efficient production in the plastic products industry.

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