Chapter 1 : Important Safety Instructions; Installation Warnings; Connection Warnings - Delta Ultron Series User Manual

Chapter 1 : Important Safety Instructions

1.1

Installation Warnings

• This is a three-phase four-wire on-line uninterruptible power supply (hereafter referred
to as 'UPS'). It can be used for commercial and industrial applications.
• Install the UPS in a well-ventilated indoor area, away from excess moisture, heat, dust,
flammable gas or explosives.
• Leave adequate space around all sides of the UPS for proper ventilation and
maintenance. Please refer to 5.2 Installation Environment.
• Only authorized Delta engineers or service personnel can perform installation and
maintenance. If you want to install the UPS by yourself, please install it under the
supervision of authorized Delta engineers or service personnel.
• Follow the IEC 60364-4-42 standard to install the UPS.
1.2

Connection Warnings

• Before applying electrical power to the UPS, make sure the UPS is grounded to avoid a
possible risk of current leakage.
• You can parallel up to eight UPS units.
• The UPS must be connected with an external battery cabinet (user-supplied, handled
and configured by Delta service personnel). Please refer to 5.5 External Battery
Cabinet Connection Warnings for relevant information.
• It is necessary to connect the protective devices with the UPS when the UPS is
connected to power sources and critical loads.
• The protective devices connected to the UPS must be installed near the UPS and easily
accessible for operation.
• Protective Devices:
1. For single input, please install (1) a protective device between the main AC source
and the UPS and (2) a protective device between the connected critical loads and
the UPS.
2. For dual input, please install (1) a protective device between the main AC source
and the UPS, (2) a protective device between the bypass source and the UPS and
(3) a protective device between the connected critical loads and the UPS.
3. Each protective device could be (1) a breaker, (2) a switch connected in series with
fuses, or (3) a switch*
table below.
1
. For the protective device's rated current, please refer to the
7