28

Symmetra MW II 1200 kW 3 × 400/230 V Installation - 990-1979E-001

Service Entrance

Residual current protective device can not be used at this point.

Owing to parallel return path for the fault current

Residual Current Sense

N

PE

With reference to:

IEC 60364-4-41 § 413.1.3.1

Minimum cross-sectional areas:

IEC 364-5-54 § 543.1.1

Earthing arrangements and protective conductors - Symmetra MW inSTNinstallation-

 

 

See:

IEC 60364-4-41

§ 413.1.3

 

 

 

Switchgear

 

 

 

 

 

 

 

 

 

 

 

 

Q3

 

 

( PDU )

 

 

 

 

 

 

 

Residual Current Sense

Residual current protective device

 

 

 

 

 

 

 

can be used.

Q5

 

 

 

External SSW-Bypass

Q6

 

Bypass - input

 

 

 

Bypass - output

 

 

 

 

 

 

 

 

 

L1

 

 

 

L1

 

 

 

 

L2

 

 

 

L2

 

 

 

 

L3

 

 

 

L3

 

 

 

 

 

 

 

Main Protective Earthing Terminal

 

 

 

 

PE

 

 

 

PE

Q4

 

 

 

 

 

 

 

 

 

PE

 

 

 

 

SymmetraMW

 

 

 

Q1

Mains - input

 

i

Delta

UPS - output

 

 

 

 

 

 

Inverter

 

 

 

 

 

L1

 

 

i

L1

 

 

 

 

L2

 

i

 

L2

 

 

 

 

 

 

 

 

 

 

 

EarthingProtectiveConductor

L3

 

 

u

L3

 

 

 

mode-Commonfilter

 

 

u

 

 

 

 

 

 

 

u

 

 

 

 

 

 

 

 

M

 

 

 

 

 

 

 

 

Main

 

 

 

 

 

 

 

 

inverter

 

 

 

 

N

 

 

 

N

 

 

 

 

E

 

 

 

 

 

 

 

Protective Earthing Conductor

 

 

 

Main Protective Earthing Terminal

 

 

 

 

PE

 

 

 

PE

 

 

 

 

+

-

+

-

 

 

 

 

 

Battery 1

 

 

Battery 2

 

 

 

 

 

Battery

 

 

 

 

 

 

 

 

breaker

 

 

 

 

 

 

 

 

box Q7

 

 

Q8

 

 

 

 

 

PE

 

 

 

 

 

 

 

Suitable earth electrode

 

 

 

 

 

 

 

 

with reference to IEC 60364-5-55 § 551.4.2

 

 

 

 

 

 

 

 

 

Battery

 

 

 

 

 

 

 

 

rack

 

 

 

 

 

 

 

 

Battery 1

Battery 2

 

 

 

 

 

PE

 

 

 

 

 

 

 

Page 32
Image 32
APC MW II manual See IEC