當操作者發(fā)電機組碳刷打火嚴重、破碎、刷辮發(fā)熱變紅等不立即處理有可能引起環(huán)火的情況，運行人員應立即更換，更換時應注意以下事項和方法：

When the operator does not immediately deal with the situation that may cause ring fire, such as serious ignition, breakage, heating and redness of the brush braid of the generator set, the operator shall replace it immediately. During replacement, pay attention to the following matters and methods:

1.更換工作必須由兩人且由主值班員親自進行更換。

1. The replacement work must be carried out by two people and the main attendant in person.

2.更換時，工作人員應穿工作服，緊扣袖口、站在絕緣墊上進行，禁止穿短袖衫或將衣袖卷起，女工應將長發(fā)卷入安全帽內。

2. During replacement, the staff shall wear work clothes, fasten the cuffs and stand on the insulating pad. It is forbidden to wear short sleeved shirts or roll up the sleeves. The female workers shall draw long hair into the safety helmet.

3.禁止雙手同時接觸兩極或一極與接地部分，不允許兩人同時進行工作。

3. It is forbidden to touch two poles or one pole and the grounding part at the same time, and two people are not allowed to work at the same time.

4.將預更換的碳刷從刷握里提出，握在手中，然后旋松刷辮螺絲、取下碳刷。

4. Lift the pre replaced carbon brush out of the brush holder and hold it in your hand, then unscrew the brush braid screw and remove the carbon brush.

5.將研磨好的碳刷握在手中，上緊刷辮螺絲，然后將碳刷用恒壓器壓入刷握。

5. Hold the ground carbon brush in your hand, tighten the brush braid screw, and then press the carbon brush into the brush holder with a constant voltage device.

6.一般情況下在同一時間內每個刷架只允許更換1-2個碳刷，換上的碳刷事先要研磨好，且新舊碳刷型號必須一致。

6. Generally, only 1-2 carbon brushes are allowed to be replaced for each brush holder at the same time. The replaced carbon brushes must be ground in advance, and the models of the old and new carbon brushes must be the same.

7.更換后應詳細記錄。

7. Detailed records shall be made after replacement.