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8.4 APPENDIX A4 - Connection diagrams

Note: Some typical connection diagram are shown.

All diagram must be considered just as example; they cannot be comprehensive for real applications.

For all diagrams the output contacts are shown in de-energized state for standard reference.

Voltage inputs - phase-to-earth VTs star connections NV10P-sch2.ai

NV10P

L1

L2

L3

UE

UL1

UL2

UL3

VOLTAGE

INPUTS

R (*)

da

dn

n

a

N

A

B7

B8

B5

B6

B3

B4

B1

B2

59N

(*) ANTIFERRORESONANZA

74TCS BF

27 27V1

81O

81U

81R

59V259

ARF

59Uavg

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Voltage inputs - delta connections VTs NV10P-sch4.ai

n

a

(*) ANTIFERRORESONANZA

L1

L2

L3

R (*)

da

dn

N

A

B7

B8

B5

B6

B3

B4

B1

B2

NV10P

UE

UL1

UL2

UL3

VOLTAGE

INPUTS

59N

74TCS BF

27 27V1

81O

81U

81R

59V259

ARF

59Uavg

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Voltage inputs - V connections VTs NV10P-sch7.ai

b

n n

a

B A

L1

L2

L3

B7

B8

B5

B6

B3

B4

B1

B2

R (*)

da

dn

N N N

A

(*) ANTIFERRORESONANZA

NV10P

UE

UL1

UL2

UL3

V

OLTAGE

INPUTS

59N

74TCS BF

27 27V1

81O

81U

81R

59V259

ARF

59Uavg

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Voltage inputs - direct connection to a low voltage network with phase to phase measure (UR= 400 V versions)Residual voltage by means of open delta VTs NV10P-sch5.ai

NV10P

UE

UL1

UL2

UL3

VO

LTAGE

INPUTS

74TCS BF

27 27V1

81O

81U

81R

59V259

ARF

59Uavg

L1

L2

L3

B7

B8Raf(*)

da

dn

N

A

BF (K2)

(*)Raf - eventuale resistenza

antiferrorisonanza

59N

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L1

L2

L3

Phase-ground voltage measurement by means of V-Sensor

VOLTAGEINPUTS

BF (K2)

P1

P2

NV10P

BF ARF

S

59N

27

27V1

81O

81U

59V2

59 59Uavg

U12, U23, U31

UEC