Sirius 800 www.snellgroup.com Power Supplies
Issue 1 Rev 1 Page 17 © 2014 Snell Limited
3. Power Supplies
3.1 Electrical Requirements
3.1.1 Important Protective Earth Information
See section 2.7.1 for full details of the Protective Earthing requirements.
3.1.2 Cable Management
See Section 2.5 for details on cable management.
3.2 Mains Power Cables
The maximum current drawn by each power supply unit is dependant on the local mains
voltage, the configuration of the router and the number of power supply shelves installed.
Each AC feed must have an Isolating Switch or Circuit Breaker. Any mains cables used must
be rated above the rating of the circuit breaker. The mains cable used should be a three core,
double screened with a minimum current rating of 25 A (typically 6 mm
2
, 10 AWG).
3.3 Power Supply Redundancy
To ensure full dual redundancy, half of the power supplies should be powered from a separate
power source to the other power supplies. Under normal operating conditions with dual power
sources, each power supply unit runs at less than 50% loading.
The number of power supply shelves should be selected based on the mains supply
operating voltage, router type and router configuration (see the appropriate Sirius 800
Installation and Quick Start guide for details).
PROTECTIVE EARTH
1. The building installation must provide a means for connection to the protective
earth. The equipment must be connected to that means.
2. A service person must check that the socket outlets that the equipment is to be
powered from provide a connection to the protective earth. If not the service person
must arrange for the installation of the protective earth wire in the building.
Installation must be in accordance with Local and National electrical codes. This product is
pluggable type B (IEC 60309).
The Sirius 800 has up to twelve “PowerCon” AC power connectors for the power supply
shelves (three or four per power supply shelf). It is the responsibility of the customer to
connect these to the mains supply.
Ensure all DC power cables are fitted before powering up the Sirius 800.
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