Load Box
The LB-5 Load Box helps to prevent the damaging effects of ferroresonance found on lightly or unloaded 3-phase power systems. ?This situation typically occurs on medium voltage distribution transformers and power cables during single phase switching. ?As the electric power industry moves towards more efficient transformer design, this condition is becoming more common. ?If such conditions exist, overvoltage can lead to the breakdown of insulation resulting in damage to the transformer, lightning arresters and other equipment. ?When using the LB-5 to connect and apply a resistive load on the transformer secondaries, damage to distribution equipment due to ferroresonance can be prevented.
Load Box model LB-5-1 includes an additional switch to disconnect the center of this Y connected load from the ground lead. This is required for corner grounded delta transformer connections.
Load Box Features
- Helps prevent ferroresonance during single phase switching
- Portable, one person design
- Dual voltage, auto voltage selection
- Powered by transformer secondaries 120/277VAC
- 5,000 watt per phase loading
- Resistive load up to 3 phases
- 40A fused disconnect switch
- Blown fuse indicator lamp
- Auto-ranging voltage input – no switching required
HD Electric Company is committed to ongoing review and improvement of its product lines, and thus reserves the right to modify product design and specifications without notice.
LB-5负载箱有助于防止在轻载或无负载三相电力系统中发现的铁磁谐振的破坏性影响。这种情况通常发生在单相开关期间的中压配电变压器和电力电缆上。随着电力工业向更高效的变压器设计发展,这种情况正变得越来越普遍。如果存在这种情况,过电压可能导致绝缘击穿,从而导致变压器,避雷器和其他设备损坏。当使用LB-5连接并在变压器次级上施加电阻性负载时,可以防止由于铁磁共振导致的配电设备损坏。
负载箱型号LB-5-1包括一个额外的开关,用于断开Y连接负载的中心与地线的连接。这是角接地三角形变压器连接所必需的。
装载箱功能
- 有助于防止单相切换期间的铁磁谐振
- 便携式,一人设计
- 双电压,自动电压选择
- 由变压器辅助设备120 / 277VAC供电
- 每相负载5,000瓦
- 电阻负载最多3个阶段
- 40A熔断式开关
- 保险丝指示灯闪烁
- 自动量程电压输入 – 无需切换
HD Electric Company致力于不断审查和改进其产品线,因此保留修改产品设计和规格的权利,恕不另行通知。