APC Symmetra MW Installation Guide download pdf (Page 52)

Residual Current Sens e

Mains - input

UPS - output

Bypass - input Bypass - output

( Alternative to earth electrode )

Earthing Conductor

Main Protective Earthing Terminal

External SSW-Bypass

Symmetra MW

( PDU )

Service Entrance

Mai n

inverter

Main Protective Earthing Terminal

Earthing arrangements and protective conductors - Symmetra MW in "IT - installation"

Residual current protective device

can be used.

+- +-

Battery 1

Battery 2

Q7 Q8

Battery 1 Battery 2

Battery

rack

Battery

breaker

box

Delta

Inverter

Common-mode filter

Switchgear

See: IEC 60364-4-41 § 413.1.5

Protective Earthing Conductor

Insulation

Monitoring

Devic e

Requirement !!

IEC 60664-4-41 § 413.1.5.4

Suitable earth electrode: R

x I

< 50V

With reference to IEC 60364-4-41 § 413.1.5.3

Alternative:

The exposed-conductive-parts can be earthed individually or in groups.

But special demands are required. See IEC 60364-4-41 § 413.1.5.5 a)

Grounding

impedance

Grounding

impedance

1 2 ... 47 48 49 50 51 52 53 54

Comments to this Manuals

No comments

APC Symmetra MW Installation Guide Page 52

Comments to this Manuals

Related products and manuals for Power supply units APC Symmetra MW