1、如果河北升降货梯http://www.rgsjpt.com/电源从高电位端出来后先经过部分控制开关到河北升降货梯制动器线圈，然后再经部分控制开关回到零线，则会有安全问题。因为，此时如果抱闸线圈低电位处因绝缘损坏而对地时，后面的开关会被短接而失效。
If Shandong Huoti first power from the high potential side out after a part of the control switch to Shandong Huoti brake coil, and then switch back to partially control the zero line, then there will be security problems. Because, this

time due to insulation damage on the ground, the back of the switch will be short and fail if the brake coil at low potential.

2、如果河北升降货梯http://www.rgsjpt.com/电源从高电位端出来后直接经过河北升降货梯制动器线圈，再经各控制开关回到零线，则问题会更大。此时，如果河北升降货梯抱闸线圈低电位处因绝缘损坏而对地时，制动器上的所有开关将全部失效，制动器会因直接通电而自动开闸，制动器抱闸无法合闸制动。
Directly through Shandong, Shandong cargo lifter lift if the power from the high potential side out after the freight elevator brake coil, and then switch back to the zero line of the control, then the problem will be even greater. At

this point, if the brake coil Shandong cargo lifter at a low potential to cause damage to the insulation, all the switches on the brake will all fail, the brake automatically because of direct electrical gate, brake brake brake can not be closing.