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JDB-80、120、225-A型电动机综合保护器是我厂生产的新型电动机综合保护装置。是在原JDB-120、225型电机综合保护器基础上改进设计的一种新型保护装置。整个装置具有优良的过载反时限保护，断相不平衡保护、短路与速动保护及漏地闭锁保护功能，各项指标均达到先进水平，是煤矿及各种电力线路安全生产不可缺少的综合保护器。
一、用途
1、JDB-80、120、225-A型电动机综合保护器用于交流50Hz，电压至660V，电流从5A-220A的长期工作制，与间断工作制反复短时工作制的交流电动机及各种电力线路过载断相，短路保护与漏地闭锁之用。
2、保护器适用于下列条件工作
①可在地面单独使用或装在QBC磁力、QBZ真空防爆开关内在煤矿井下使用。
②周围介质温度不高于+50℃、不低于-15℃。
③周围空气相对湿度不大于95％（+25℃）。
④在无强烈颠簸振动的地方。
⑤在无足以腐蚀金属和破坏绝缘的气体及经常充满蒸气的环境中。
⑥提供本装置的电源为交流36V，其电压波动范围不超过+15％～-25％。
3、保护器分JDB-80-A、JDB-120-A、JDB-225-A型三种规格，其电路结构完全相同，电流范围分别列
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| 品牌 | YDDZ | 型号 | JDB电动机综合保护器 |
| 额定电压 | 1140（V） | 断开容量 | 。。。。 |
| 额定电流 | 220（A） | 绝缘耐压测试 | 。。。。（Vac /分钟） |
| 产品认证 | 。。。 |
