30

Earthing arrangements and protective conductors - Symmetra MW in "TN-installation"C-S

Symmetra MW II

Service Entrance

Residual current protective device can not be used.

Switchgear

Q5

See:

IEC 60364-4-41

§ 413.1.3

 

 

 

 

Q3

 

 

 

( PDU )

 

 

 

 

 

Residual current protective

 

 

 

 

Current Sense

device can be used.

 

 

 

 

 

External SSW-Bypass

 

Residual

 

Bypass - input

 

Bypass - output

Q6

 

 

 

 

L1

 

L1

 

 

 

L2

 

L2

 

 

 

L3

 

L3

 

 

 

Main Protective Earthing Terminal

 

 

 

 

PE

 

PE

Q4

 

 

 

 

 

 

PE

 

SymmetraMW

 

 

 

 

1200 kW 3 × 400/230 V Installation

PEN

Residual Current Sense

PEN

Q1

ConductorEarthing

Protective

PE

Mains - input

 

i

Delta

 

UPS - output

 

 

Inverter

 

 

L1

 

 

i

 

L1

 

 

 

 

 

L2

 

i

 

 

L2

 

 

 

 

 

L3

 

 

 

 

L3

 

 

 

 

u

u

filter

 

 

 

 

 

 

 

 

M

Common-mode

 

 

 

 

 

 

 

 

Main

 

 

 

 

inverter

 

 

 

 

u

N

 

 

 

 

N

E

 

 

 

 

 

 

 

 

 

Main Protective Earthing Terminal

PE

 

 

 

 

PE

+

-

+

-

 

 

Battery 1

 

 

Battery 2

 

 

- 990-1979E-001

With reference to:

IEC 60364-4-41 § 413.1.3.1

Suitable earth electrode

with reference to IEC 60364-5-55 § 551.4.2

Battery

 

breaker

 

box Q7

Q8

PE

 

Battery

 

rack

 

Battery 1

Battery 2

PE

Page 34
Image 34
APC MW II manual Symmetra MW