【Weekend Share-2】Does an emergency stop button need a protective cover?

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This post was last edited by zhoudingshengs on 2024-12-14 07:36. 1. Does the emergency stop button require a protective cover? 【Answer】It’s best not to raise such problematic doubts during the inspection! 【Basis】 Proponent: According to Article 8.0.2 of the \"Code for Construction and Acceptance of Low-Voltage Electrical Apparatus in Electrical Installation Projects\" (GB50254-2014), the installation of buttons shall comply with the following provisions: 3 Buttons installed together shall be numbered or equipped with distinct identification marks; \"emergency\" buttons shall have visible markers and shall be fitted with protective covers. 　　\"Design Specifications for Signal Alarm and Interlock Systems\" (HG/T 20511-2014) 4.11.4 Emergency stop buttons shall be red mushroom-shaped buttons equipped with protective covers. 　　\"Technical Requirements for Machine Safety Emergency Stop Devices\" (GB/T 41349-2022) – This document applies to emergency stop devices that activate the emergency stop function by pressing a button. 　　 4.3.6 A protective ring can be installed to prevent accidental activation. The structure of the protection ring should not cause harm to the hand that triggers the emergency stop function, nor should it weaken the effectiveness of that trigger. 5.2.6 To prevent accidental activation, visually check whether the emergency stop device has a protective ring. If applicable, it shall meet the requirements of 4.3.6. Opposing counsel: \"Mechanical Safety – Design Principles for Emergency Stop Functions\" (GB/T 16754-2021) 4.1.1.2 The emergency stop function must be available and operable at all times. 4.5 Preventing accidental braking by the emergency stop device: The design of the emergency stop device should prevent accidental braking. Accidental braking should be prevented as much as possible by selecting the installation location rather than relying on other practical design measures. It should not affect the braking of the emergency stop device. To prevent possible accidental braking by the emergency stop device, the following preventive measures can be taken: place the emergency stop device away from areas expected to have heavy traffic ； 1. Choose the appropriate type of emergency stop device ； —Select an emergency stop device of appropriate size or shape ； A quick-stop device is installed on the recessed surface of the control panel. It is advisable to avoid using the emergency stop device guard ring, unless no other measures can prevent the emergency stop device from being activated accidentally.