Specification guide
Single UPS, three-phase, 160 to 500 kVA
(cont.)
APC by Schneider Electric Edition - 01/2010 Single UPS spec - p.
7
6.5. Safety
For the safety of maintenance personnel, the cabinet shall be provided with a manually operated mechanical
bypass designed to isolate the rectifier, charger, inverter and static switch while continuing to supply the load from
the bypass AC source.
The UPS shall be equipped with a terminal block for reception of an external EPO order resulting in opening of the
battery circuit breaker and shutdown of all converters.
7. Environment conditions
7.1. UPS (not including battery)
7.1.1. Operation
The UPS, not including the battery, shall be capable of operating under the following environmental conditions
without loss of performance:
ω Temperature range during continuous operation: 0°C to 35°C
ω
Maximum temperature: 40°C for eight hours
ω Recommended temperature range: + 20°C to + 25°C
ω Maximum relative humidity: 95% at 25°C
ω Maximum altitude without derating: 1000 m.
7.1.2. Storage
The UPS, not including the battery, shall be designed for storage under the following conditions:
ω Ambient temperature range: - 10°C to + 45°C.
8. Protection
8.1. UPS
The UPS shall include protection against AC-source over voltages (as per standard IEC 60146), excessive external
or internal temperature rise and vibrations and impacts during transport.
8.2. Rectifier and charger
The rectifier shall automatically shutdown if the temperature exceeds the limits specified in section 7.1.1.
The charger shall automatically shut down if the DC voltage reaches the maximum value specified by the battery
manufacturer or if the temperature exceeds the limits specified in section 7.1.1.
8.3. Inverter
Inverters shall self-protect against overloads and short-circuits, irrespective of the operating mode (AC power or
battery power).
8.4. Battery
8.4.1. Protection against deep discharge and self-discharge
The UPS shall comprise a device designed to protect the battery against deep discharges, taking into account the
characteristics of the discharge cycles, with isolation of the battery by a circuit breaker.
8.4.2. Independent regulation and monitoring systems
A regulation system shall regulate the battery voltage and the charge current.
A second system, independent of the regulation, shall monitor the battery voltage and the charge current.
Consequently, if the regulation system fails, the monitoring system steps in to shut down the charger and avoid
overcharging.
8.4.3. Regulation of the battery voltage depending on the ambient temperature
A temperature sensor adapts the charge voltage to the ambient temperature.
This regulation system takes into account the chemical reaction and prolongs the battery service life.
The permissible temperature range is set in the personalization parameters.
An alarm shall be issued for temperatures outside the permissible range.
