Pact Series ComPact NSX – Modbus Communication – User Guide PDF
DOCA0091EN-08

Measurement Parameters

System Type

The setup ENVT (External Neutral Voltage Tap) presence command (command code = 46472) configures the content of the system type register.

Address

Register

RW

X

Unit

Type

Range

A/E

Description

0x0CF1

3314

R-WC

–

–

INT16U

30–41

A/E

System type

Determining system type:

If...

Then...

Result

the system type is 3-pole circuit breaker with external neutral current transformer and without external neutral voltage tap

system type = 30

  • Measurements of the phase-to-phase voltages are available.

  • Measurements of the phase-to-neutral voltages are not available.

  • Measurement of the neutral current is available.

  • 3 wattmeters method is not possible.

the system type is 3-pole circuit breaker without external neutral current transformer and without external neutral voltage tap

system type = 31

  • Measurements of the phase-to-phase voltages are available.

  • Measurements of the phase-to-neutral voltages are not available.

  • Measurement of the neutral current is not available.

  • 3 wattmeters method is not possible.

the system type is 3-pole circuit breaker without external neutral current transformer and with external neutral voltage tap

system type = 40

  • Measurements of the phase-to-phase voltages are available.

  • Measurements of the phase-to-neutral voltages are available.

  • Measurement of the neutral current is not available.

  • 3 wattmeters method is possible.

the system type is 3-pole circuit breaker with external neutral current transformer and external neutral voltage tap, or if the system type is 4-pole circuit breaker

system type = 41

  • Measurements of the phase-to-phase voltages are available.

  • Measurements of the phase-to-neutral voltages are available.

  • Measurement of the neutral current is available.

  • 3 wattmeters method is possible.

Quadrant Total

Address

Register

RW

X

Unit

Type

Range

A/E

Description

0x08C1

2242

R

–

–

INT16U

1–4

E

Quadrant total

0x08C2

2243

R

–

–

INT16U

0–1

E

0 = lead

1 = lag

Power Flow Sign

The power flow sign command (command code = 47240) configures the content of the power flow sign register.

Address

Register

RW

X

Unit

Type

Range

A/E

Description

0x0CF3

3316

R-WC

–

–

INT16U

0–1

E

Power flow sign:

0 = the active power flows from upstream (top) to downstream (bottom) (factory setting).

1 = the active power flows from downstream (bottom) to upstream (top).

Power Factor Sign

The power factor sign configuration command (command code = 47241) configures the content of the power factor sign register.

Address

Register

RW

X

Unit

Type

Range

A/E

Description

0x0CF5

3318

R-WC

–

–

INT16U

0–2

E

Sign convention for the power factor and the fundamental power factor (cosϕ):

0 = IEC convention

2 = IEEE convention (factory setting)

Energy Accumulation Mode

The energy accumulation mode configuration command (command code = 47242) configures the content of the energy accumulation mode register.

Address

Register

RW

X

Unit

Type

Range

A/E

Description

0x0CFB

3324

R-WC

–

–

INT16U

0–1

E

Energy accumulation mode:

0 = absolute accumulation (factory setting)

Ep = EpIn + EpOut

Eq = EqIn + EqOut

1 = signed accumulation

Ep = EpIn – EpOut

Eq = EqIn – EqOut

Demand Time

The current demand configuration command (command code 47243) configures the content of register 3352.

The power demand configuration command (command code 47244) configures the content of registers 3354 and 3355.

Refer to the ComPact NSX MicroLogic 5/6/7 Trip Units - User Guide Related Documents for more information regarding the demand calculation method.

Address

Register

RW

X

Unit

Type

Range

A/E

Description

0x0D17

3352

R-WC

–

min

INT16U

5–60

E

Duration of the current demand calculation window, adjustable in steps of 1 minute.

The factory setting is 15 minutes.

0x0D19

3354

R-WC

–

–

INT16U

0–5

E

Power demand calculation method (window type):

0 = sliding (factory setting)

2 = block

5 = synchronized to communication

0x0D1A

3355

R-WC

–

min

INT16U

5–60

E

Duration of the power demand calculation window, adjustable in steps of 1 minute.

The factory setting is 15 minutes.

Nominal Voltage

The setup nominal voltage Vn display command (command code = 47245) configures the content of the nominal voltage register.

Address

Register

RW

X

Unit

Type

Range

A/E

Description

0x258F

9616

R-WC

1

V

INT16U

0–65535

A/E

Nominal voltage Vn.

Factory setting = 400 V
Contact Information
Legal Information