MS-EBG 2017-08-02 by Mitsubishi Electric Factory Automation

More catalogs by Mitsubishi Electric Factory Automation | MS-EBG 2017-08-02 | 8 pages | 2019-12-13

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Page 6 of MS-EBG 2017-08-02

ms-ebg earthing devices earthing truck optional earthing devices are available for safety during cable and busbar maintenance and/or inspection the following two types of earthing device can be provided upon request with the ms-ebg for more demanding applications an earthing truck with fault-making capability can be supplied which employs the same operating mechanism as the vacuum circuit breaker integral earthing switch for the purposes of safety during equipment cable and busbar maintenance and/or inspection a circuit earth switch can be integrated within the cable compartment operated from the front of the panel a mechanical interlock between the switch and circuit breaker or fused contactor is provided for busbar earthing switches are usually integrated within a bus riser/vt panel and employ electrical interlocking with the adjacent panel’s circuit breaker the mechanical indicator and operation for the switch can be viewed from the front of the panel through a small circular inspection window ms-ebg’s earthing switch detail 1 g as exhaust duct or gas screen optional 1 2 ventilator 2 3 control compartment 4 withdrawable equipment ­compartment 5 busbar compartment 6 cable compartment 7 circuit breaker 8 earthing switch optional 3 9 power cable notes 1 gas exhaust duct or gas screen required when internal arc classification aflr is required 2 when the current within a compartment is 2000 a or greater a ventilator is required for that compartment however not required if gas exhaust duct used 3 earthing truck is applied for 17.5 24 kv switchgear with ik >25 ka 6