3.1.6 Meter Type Settings Register


Bit	31	30	29	28	27	26	25	24
	Dto4WY_TRANSFORM		MISSING_PHASE[1:0]		SERVICE_TYPE[3:0]
Access	R/W		R/W	R/W	R/W	R/W	R/W	R/W
Reset	0		0	0	0	0	0	0


Bit	23	22	21	20	19	18	17	16

Access
Reset


Bit	15	14	13	12	11	10	9	8
			SENSOR_TYPE_I_N[1:0]		SENSOR_TYPE_V_C[1:0]		SENSOR_TYPE_I_C[1:0]
Access			R/W	R/W	R/W	R/W	R/W	R/W
Reset			0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	SENSOR_TYPE_V_B[1:0]		SENSOR_TYPE_I_B[1:0]		SENSOR_TYPE_V_A[1:0]		SENSOR_TYPE_I_A[1:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bit 31 – Dto4WY_TRANSFORM

For use with: 4-Wire and 3-Wire DELTA meters only. Phase voltages (and currents, where applicable) are transformed into an equivalent 4-wire Wye service for metering using alternate equations.

Value	Name	Description
0x0	DISABLED	Phase voltages remain in native service (no transformation).
0x1	ENABLED	Phase voltages transformed into an equivalent 4-wire Wye service. Transformation may lose accuracy in non-Blondel/unbalanced situations. Meter vector transformation is useful in some applications and possible, transforming 3-Phase Delta meters into an equivalent 3-Phase 4WY. However, it is useful only for balanced voltage situations.

Bits 29:28 – MISSING_PHASE[1:0] Missing phase voltage select

For use with Poly-phase 4-wire Wye 2-1/2 element meters only.

Value	Description
0x0	Generate missing phase voltage for Phase_A: V_A = -(V_B + V_C).
0x1	Generate missing phase voltage for Phase_B: V_B = -(V_A + V_C).
0x2	Generate missing phase voltage for Phase_C: V_C = -(V_A + V_B).

Bits 27:24 – SERVICE_TYPE[3:0] Electrical Service Type

The service type determines what meter form is being implemented and how the Metrology DSP core interprets and processes the ADC values. Refer to the Annex – Meter Forms for additional information.

Value	Name	Description
0x0	3P4WY_3E_3V3I	Three-phase 4-wire Wye (3-element)
0x1	3P4WD_3E_3V3I	Three-phase 4-wire Delta (3-element).
0x2	3P3P4WY_2p5E_2V3I	Three-phase 4-wire Wye (2-½ element)
0x3	3P4WD_2E_3V2I	Three-phase 4-wire Delta (2-element)
0x4	3P3WD_2E_2V2I	Three-phase 3-wire) Delta (2-element)
0x5	2P3W_2E_2V2I	Two-phase 3-wire Network (2 element)
0x6	1P3W_1p5E_1V2I	Single-phase 3-wire (1-½ element)
0x7	1P2W_1E_1V1I	Single-phase 2-wire (1 element)
0x8	1P3W_1E_2V1I	Single-phase 3-wire (1 element)

Bits 13:12 – SENSOR_TYPE_I_N[1:0] Current Sensor Type on N Phase

Selects the types of current and voltage sensor used. Read the following table for additional information.

Bits 11:10 – SENSOR_TYPE_V_C[1:0] Voltage Sensor Type on C Phase

Selects the types of current and voltage sensor used. For each channel selected as using a Rogowski sensor, the Metrology DSP implements a digital integrator filter to normalize the effects of the sensor’s di/dt behavior.

Value	Name	Description
0x0	CURRENT TRANSFORMER	—
0x1	RESISTIVE SHUNT	May only be used with phase-to-neutral voltage measurement applications.
0x2	ROGOWSKI COIL (CRC) CURRENT SENSOR	A digital integrator function is added to the DSP of all current channels selected as using Rogowski Coils. When SENSOR_TYPE_I_x = 2, an additional phase correction is internally added to each channel with a Rogowski sensor in the amount of -0.3704º (@ 60 Hz) to correct for a linear phase response introduced by the digital integrator filter. This is taken into account during the internal calculation of actual phase-correction filter coefficients, when a new set of phase calibration settings are loaded, and must not be added by the user in the phase-correction entries. When SENSOR_TYPE_I_x is set to other values, it takes no effect.
0x3	RESISTIVE DIVIDER (VRD) VOLTAGE SENSOR	Normally, this is the typical option selected for voltage sensors.