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

Chapter 1 : Important Safety Instructions

1.1

Installation Warnings

• This is a three-phase three-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. To avoid fire accidents and electric shock, the indoor area
must be free of conductive contaminants. For the temperature and humidity
specifications, please refer to Appendix 1: Technical Specifications.
• 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 National Electrical Code (ANSI/ NFPA 70) standard to install the UPS.
1.2

Connection Warnings

• Before applying electrical power to the UPS, make sure that the UPS is grounded to
avoid a possible risk of current leakage.
• You can parallel a maximum of three 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.
• The UPS must be connected with an external maintenance bypass cabinet (user-
supplied, handled and configured by Delta service personnel). For the external
maintenance bypass cabinet's information, please refer to the table below.
External
Maintenance
Bypass Cabinet
(user-supplied,
handled and
configured by
Delta service
personnel)
For configurations of the external maintenance bypass cabinet,
please refer to the following.
a. Selection of three or four breakers (switches):
(1) Three breakers (switches) for single input:
An input breaker (switch), a manual bypass breaker (switch)
and an output breaker (switch) must be installed.
(2) Four breakers (switches) for dual input:
An input breaker (switch), a bypass breaker (switch), a manual
bypass breaker (switch) and an output breaker (switch) must
be installed.
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