Maintenance Mode Switch (MMS) Installation Instructions

The maintenance mode setting (MMS) switch is designed to temporarily reduce the short-time delay setting of the circuit breaker where MMS is installed. ZSI cannot be applied for short-time on the same circuit breaker. Either solution (ZSI or MMS) meets the National Electrical Code (NEC) 240.87 requirements for arc flash reduction.

Language: English | French | Spanish

Maintenance Mode Switch (MMS) Installation Instructions

Release date 31 Jan 2025
Version 04
Document ref. MFR70008
File format PDF (708.7 KB)
File name | Size | Action MFR70008.pdf 708.7 KB

Maintenance Mode Switch (MMS) Installation Instructions

The maintenance mode setting (MMS) switch is designed to temporarily reduce the short-time delay setting of the circuit breaker where MMS is installed. ZSI cannot be applied

Language: English | French | Spanish
Release date 31 Jan 2025
Version 04
Document ref. MFR70008
File format PDF (708.7 KB)
MFR70008.pdf
Release date 31 Jan 2025
Version 04
File name MFR70008.pdf
File format PDF