Secondary replaceable fuse versions of

many barriers are available and form the

MTL7100 sub-series. These are useful where there is

a possibility of faults occurring during commissioning

which would otherwise blow the barriers’ internal

safety fuses. One secondary replaceable fuse for

each barrier channel is provided and is lower in

value than the related safety fuse. Fuses are

packaged in small mouldings which can be latched

in a ‘disconnect’ position to break the safe and

hazardous areas during commissioning,

maintenance or fault finding, thus avoiding the need

for additional disconnect terminals.

Where a fuse is less likely to be

necessary, the MTL7200 sub-series uses a latching

out link only, to provide the basic loop disconnection

of the MTL7100 sub-series.

SUB-SERIES

MTL7000 Series barrier circuits are based on the well-proven designs

originally developed for the MTL700 Series. To simplify identification

for those familiar with the latter, part numbers are the same for

equivalent barriers, but with a ‘0’, ‘1’ or ‘2’ inserted after the initial

‘7’ to identify the relevant sub-series:

MTL7000 standard

MTL7100 fuse-disconnect

MTL7200 link-disconnect