Operation Manual

ManualsBrandsGossen Metrawatt ManualsMeasuring ToolMAVOWATT 4

12 GMC-I Messtechnik GmbH

Active power and power factor measurement on three-wire, three-phase systems, balanced load

P (W) = · I · U · cos

=  · c

3

L1

(2)

L2

(5)

L3

(8)

I

(3)

I*

(1)

L2

L3

L1

L1

(2)

L2

(5)

L3

(8)

I

(3)

I*

(1)

L2

L3

L1

Direct connection:

L2

L3

L1

L1

(2)

L2

(5)

L3

(8)

I

(3)

I*

(1)

v

k

L1

(2)

L2

(5)

L3

(8)

I

(3)

I*

(1)

K

k

L

L2

L3

L1

l

Connection via current transformer:

P (W) = · I · U · cos 

= · c · ü

I

3

Connection via current and voltage

transformer:

L1

(2)

L3

(8)

I

(3)

I*

(1)

L2

L3

L1

L2

(5)

P (W) = · I · U · cos

= · c · ü

I

· ü

u

3

V

v

u

UV

u

UK

l

L