MT 670-1997Specification for prevention against the stray corrent of underground traction network of coal mines (English PDF)

1 Foreword

MT 670-1997 was issued by State Administration of Work Safety on 10 November 1997 and has been in force since 1 April 1998.

The MT prefix, without a suffix, marks a mandatory standard: within its scope, compliance is required.

The document runs to 8 pages in English translation.

2 Scope Preview

This standard specifies the security value and measure the traction network and associated coal mine production sites stray current stray current limit values. This standard applies to coal mine overhead line electric vehicle transportation system John stray current control.

MT 670-1997 is filed under Chinese Standard Classification D09, in the field of mining.

This catalogue holds 137 other MT standards without an ICS number.

In this catalogue, MT standards carry edition years from 1975 to 2011.

3 About this standard

Sector: Coal Industry Standard

Issued by: State Administration of Work Safety

English translation: about 8 pages (approximate)

Chinese original: about 10,140 characters

4 Related standards

Standards on related subjects:

AQ 1043-2007 — Mining Products Safety Label

AQ 6206-2006 — Coal mine high-low concentration methane transducer

MT/T 702-2020 — Technical specifications for coal mine grouting (grouting) fire prevention and fire fighting

MT/T 441-2020 — Technical Specification for Mixed Ventilation in Roadway Driving

5 Classification and status

Chinese Standard Classification (CCS): D 09

Prefix MT: mandatory standard.