Morris Line are considered by many to be second to none when it comes to isolators for railway electrification.
Manufacturers and suppliers of medium voltage 25kV 1250A track switches to the rail industry for more than 40 years, Morris Line has supplied many rail projects World Wide; From Canada, Brazil, China and Hong Kong, although the main market at present would be within the UK.
Over the last 40 years our product range for 25kV 1250amp overhead line switches has gone from a single blade 800amp disconnector, to a double blade 1250amp full load break switch, which can be manually or motor operated.
Our 3 position track switch can be used in various configurations such as closed open earthed or closed open alternative, alongside this the unit also can be configured as a double switch or quad switch (four switch layout); this allows the designer to use the same switch for single or multiple track designs. Due to its unique design the Track switch has recently been modified to be used as a CME circuit main earth or FED fixed earthing devise.
Designed to be suitable for mounting on standard OLE support structures directly above the track, the type FED fixed earthing device has been developed to cater for Network Rail’s latest requirements for fast and reliable section earthing of overhead lines.
Available in a variety of single pole and ganged multi-pole configurations to suit all portal and gantry structures, the FED can be operated either manually or by means of a purpose-designed motor mechanism which allows for remote operation driven by hard wired reliable relay logic and can accommodate specific electrical interlocking arrangements.
The Vacuum Interrupter has been developed to cater for the requirement for cost-effective and reliable load breaking and short-circuit making of energised overhead lines and is designed to comply with Network Rail’s latest specification for 25kV a.c. disconnectors, earthing switches and switches.
Used in conjunction with the MLE range of fully approved disconnectors it is the first of its kind to allow safe on-load operation of an outdoor structure mounted rotating track switch, thereby maintaining electrical clearances in congested overhead conductor systems while continuing to provide clearly visible indication of isolation and minimising disruption to the network.
The Vacuum Interrupter allows track switches to operate when feeder circuit breakers are closed without the risk of damaging the disconnectors. Arc interruption is achieved by drawing the arc through a silicone moulded vacuum bottle which offers extremely high dielectric strength. The interruption of current in this way is the ideal switching technology for the application and provides an environmentally friendly, low maintenance and long-life switching solution.
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