- 208 Volt Applications
For 208 volt applications, any two of the hot phase conductors will be connected
to the X and Y terminals of a suitable NEMA X6-XX receptacle. The ground wire
will be connected to the ground lug (colored green).
7. Battery Self-Discharge During Storage on the PS-1501VI
INFORMATION: Question:
What is the shelf life of a UPS when stored in the "off" condition without input
power and with no UPS load?
Answer:
The answer is strongly dependent on ambient temperature and is slightly varies
depending on the UPS model.
Temperature Effects:
The type of battery used in all UPS products has a "self-discharge"
characteristic. This is the amount of charge the battery will naturally lose
even if it is not connected to anything. At 20
!
Celsius, a battery will lose 3%
of its capacity per month. However, at 40
!
Celsius, a battery will lose 10% of
its capacity per month.
With -UPS: PS-1501vi
There are two ways to turn off a -UPS. When applicable, if the UPS is
switched off by using the rear switch, then the battery discharge is equal to
the self-discharge rate. However, if the UPS is switched off with the front
panel button, then the self discharge rate at 20
!
Celsius will increase from the
natural 3% to 5% per month. The lost power goes into a small micropower circuit
which is needed in order for the UPS to "remember" if it is supposed to restart
automatically when the AC power is restored.
However, if the UPS is switched off with the front touch switch, then the self
discharge rate at 20
!
Celsius will increase from the natural 5% to 7% per month.
The additional lost power goes into a small micropower circuit which is needed
for the UPS to "remember" if it is supposed to restart automatically when the AC
power is restored.
Bottom Line:
In general, if a UPS is to be stored for a long period of time, the following
procedures are strongly recommended in order to keep the batteries from
discharging beyond the safe limit:
- If the ambient temperature during storage is - 15
!
C to + 30
!
C (+ 5
!
F to +
86
!
F), perform a full recharge cycle at least every 6 months.
- In environments where the ambient temperature is + 30
!
C to + 45
!
C (+ 86
!
F to +
113
!
F), perform a full recharge cycle at least every 3 months.
8. UPS Safety Information
A must read
Introduction
This document provides guidance regarding potential safety hazards of ps-1501 UPS
systems. A UPS is electrical equipment and contains the same materials and
construction details as typical office equipment or home appliances. In
addition, the UPS has an internal battery which is an energy source and contains
hazardous substances. This document is applicable to any self contained UPS,
regardless of manufacturer. In addition, this unit has a stepdown transformer which
allows 220v 50hz power to be output at 120v 50hz.
