What are the benefits of an external maintenance bypass switch?

Capability for total isolation for UPS maintenance, with no disturbance to the load.
Greatly reduced cost and size when compared to other systems using ‘Key interlocking.’
Totally safe and user friendly, simple switching sequence, no risk of back-feeding UPS.
Use of electrical interlocking ensures ‘no-break’ transfer without complex & expensive key interlock arrangement.
No need for additional Maintenance switches or key exchange boxes (cost savings)
Standard system using top quality switchgear, which is readily available (prompt delivery)
Can easily be customised to incorporate larger terminals for oversized cables.
Can be built to include full MCB/MCCB protection or just isolation depending on site requirements.
Unit can also incorporate shunt trip facilities for ‘emergency power off’ (EPO) on input and by-pass switches.
Can be installed outside normal hours, by a competent electrician, to enable UPS to be installed during normal hours without a further shutdown.
Capability for ‘ two input’ systems giving greater flexibility and security for the critical load.
Local MCB/MCCB allow downsizing of cables locally without extra protection devices.