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Accura 2500M Main Module

Power Supply: Accura 2500M-AC220V/DC110V
Port name	L+, N-,(Ground)
Connector type	Terminal block (M4 / bolt head size Ø7)
Wire specs / Torque	0.75 — 6.0 mm² (18 — 10 AWG), copper / max. 1.2 Nm (12 kgf-cm, 10.6 lbf-in)
Power Supply(Us)	AC 100 — 240 V, DC 100 — 300 V, CAT Ⅱ
Operating voltage range	0.9 x Us — 1.1 x Us
Power consumption¹	Maximum 20 W
Inrush current²	Peak 31 A, duration: no more than 1 ms(AC 220 V)
	Peak 11 A, duration: no more than 0.2 ms(DC 110 V)
Power Supply: Accura 2500M-DC24V
Port name	L+, N-,(Ground)
Connector type	Terminal block (M4 / bolt head size Ø7)
Wire specs / Torque	0.75 — 6.0 mm² (18 — 10 AWG), copper / max. 1.2 Nm (12 kgf-cm, 10.6 lbf-in)
Power Supply(Us)	DC 24 V, CAT Ⅱ
Operating voltage range	DC 20 — 30 V
Power consumption¹	Maximum 20 W
Inrush current²	Peak 6 A, duration: no more than 1 ms
Power Supply: Accura 2500M-DC48V
Port name	L+, N-,(Ground)
Connector type	Terminal block (M4 / bolt head size Ø7)
Wire specs / Torque	0.75 — 6.0 mm² (18 — 10 AWG), copper / max. 1.2 Nm (12 kgf-cm, 10.6 lbf-in)
Power Supply(Us)	DC 48 V, CAT Ⅱ
Operating voltage range	DC 36 — 63 V
Power consumption¹	Maximum 20 W
Inrush current²	Peak 23 A, duration: no more than 0.5 ms
Voltage Input
Module	Accura 2500M		Accura 2500M-VD^3,4
Port name	V₁, V₂, V₃, V_N		+Vdc, COM, -Vdc
Connector type	Terminal block (M4 / bolt head size Ø7)
Wire specs / Torque	0.75 — 6.0 mm² (18 — 10 AWG), copper / max. 1.8 Nm (18.4 kgf-cm, 16 lbf-in)
Measurement category	Category III
Measured frequency range	DC, 42 — 65 Hz
Impedance	10 MΩ		20 MΩ
Burden	0.01 VA/phase @AC 220 V		0.05 W @DC 1,000 V
	0.001 W @DC 100 V
AC Voltage Measurement
Wiring method	3P4W, 3P3W, 1P3W, 1P2W
Sampling	512 samples/cycle
Measurement cycle(gapless)	Basic measurement	Frame: 0.2 sec (12 cycle@60 Hz, 10 cycle RMS @50 Hz)
	Dip/Swell measurement	1 cycle
Voltage	Measuring range (accuracy ensured)	AC 35 – 347 V L-N
		AC 60 – 600 V L-L(for unearthed Delta & Y systems)
	Accuracy	IEC 61557-12 Class 0.5	±0.5 % Reading
	Minimum measured value	AC 5 V L-N
	Measured data	Line-to-neutral voltage, Line-to-line voltage
		Fundamental, harmonics(up to the 50th order)⁵
		Vector diagram(phasor), THD, waveforms
		Symmetrical components(positive, negative, zero-sequence)
		Unbalance according to symmetrical components/the NEMA standard
Residual voltage	Measuring method	Calculated by summing the 3-phase voltages
	Measured data	RMS, fundamental
	Accuracy/ operating range	±0.5 % Un ⁶/ Up to 347 V L-N
Frequency	Measuring range	42 — 65 Hz
AC Power Quality
Dip/Swell⁵	Measured value/Threshold	RMS voltage updated every cycle	Threshold set by users
PQ Curve⁵	Measured value/Threshold	RMS voltage updated every cycle	Dip/Swell: 90 % / 110 % of Vref
	Curve type	SEMI F47-0706, IEC 61000-4-11/34 Class 3, ITIC
Voltage harmonics⁵,THD	Harmonic order	Up to the 50th order
	Measured data	Magnitude of each harmonic, THD
Voltage unbalance	Measured data	Line-to-neutral voltage / Line-to-line voltage unbalance according to NEMA standards
		Zero-sequence unbalance and negative-sequence unbalance
DC Voltage Measurement
Module	Accura 2500M		Accura 2500M-VD
Wiring method	1DC2W, 2DC3W, 3DC4W, Bipolar(3W)		1DC2W, Bipolar(3W), Unipolar(2W)
Sampling frequency	25.60 kHz(sampling cycle 39usec) @50Hz mode
	30.72 kHz(sampling cycle 33usec) @60Hz mode
Measurement cycle (gapless)	Basic measurement: Frame 0.2 sec
	Dip/Swell measurement: 1 subframe (20 msec @50 Hz mode, 16.7 msec @60 Hz mode)
Measuring range(accuracy guaranteed)	Up to 300 Vdc		1DC2W, Bipolar(3W): Up to 1,000 Vdc Unipolar(2W): Up to 2,000 Vdc
Max. measuring range	Up to 550 Vdc		1DC2W, Bipolar(3W): Up to 1,200 Vdc Unipolar(2W): Up to 2,400 Vdc
Measurement accuracy	±0.5 % Reading ± 0.05 % Un ⁷		±0.5 % Reading ± 0.05 % Un ⁷
Min. measured value	5 Vdc		10 Vdc
Measurement data	DC voltage , RMS voltage, waveforms		DC voltage , RMS voltage, waveforms
DC Power Quality
Dip/swell	Measured value/Threshold	DC voltage refreshed every subframe	Threshold set by users
Internal Communication
Type	Communication with Accura 2500D		Communication with Accura 2550
Port	1 port(DISPLAY)		2 ports for each group, 4 ports for 2 groups (All ports have the same functions)
Comm. cable	Internal communication cable for the display module(Cat 5e 24 AWG FTP)⁸		Internal communication cable⁹
Cable length	Up to 3 m		Total cable length in a group: up to 50 m(each cable: up to 10 m)
External Communication
Type	Ethernet communication		RS-485 communication
Protocol	Modbus TCP Protocol		Modbus RTU Protocol
Port	2 ports(ETHERNET1, ETHERNET2)¹⁰		1 port / Ta(TRX+), Tb(TRX-)
Connector type	RJ45 connector		Terminal block: M4/bolt head Ø7¹¹
Comm. cable	Ethernet cable Cat 5e FTP, STP, SFTP¹²		UL 2919 RS-485 1P/2P 24AWG
Comm. speed	100 Base-TX(100 Mbps/Full Duplex)		1,200 / 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 bps¹³
Wiring method	Star, Daisy-chain, Ring connection (RSTP ¹⁴ supported)		Multidrop wiring
Cable length	Maximum 100 m		Maximum 1,219 m (4,000 ft)

1. It refers to the maximum power consumption when Accura 2500D and Accura 2550 modules are connected.
2. When installing a fuse in the power input line, it is recommended to use a UL-listed fuse of Class RK5 or higher, rated at 2A/500V.
3. Accura 2500M-VD module equipped with a voltage divider should be used for DC high-voltage measurement.
4. The product number (P/N) of the combining VD module must match that of the Accura 2500M product to ensure precision measurement.
5. Line-to-line voltage and line-to-neutral voltage are measured in 3P3W and 3P4W modes, respectively.
6. Un indicates the nominal voltage, 277 V.
7. Un indicates the nominal voltage, 277 Vdc. However, the Accura 2500M-VD module has a nominal voltage (Un) of 560Vdc.
8. It is provided with the product.
9. The availability of internal communication cables depends on the type of Accura 2550 module, therefore, it must be confirmed in advance.
Additional communication cables needed for ring topology are sold separately.
The conducting wire of the communication cable should be at least 0.205 mm² (24 AWG).
It is recommended to maintain a minimum distance of 5 mm from power lines generating high levels of noise.
10. The built-in Ethernet switch enables daisy-chain connections between Accura 2500M modules without the need for external switches.
11. The maximum screw tightening torque of the barrier-type terminal block is 1.2 Nm(12 kgf-cm, 10.6 lbf-in)
12. FTP(Foiled Shielded Twisted Pairs), STP(Braided Shielded Twisted Pairs), SFTP(Braided Foiled Shielded Twisted Pairs)
13. At 115,200 bps, a master can communicate with up to 16 slave devices, within a maximum distance of 600 m.
14. RSTP(Rapid Spanning Tree Protocol), IEEE 802.1D-2004.

Accura 2500D HMI Module

LCD Display
LCD features	5"(108.0 x 64.8 mm) Color TFT LCD 800 x 480 pixel LED backlight & touch panel(The front of the LCD screen can be touched)
Internal Communication with Accura 2500M
Connector type	RJ45 connector(for connection with a communication cable)
Communication cable	Internal communication cable for the display module (Cat 5e 24 AWG FTP)¹
Cable length	Up to 3 m

1. It is provided with the product.

Accura 2550CM-3P/1P Power Measuring Module

Current Input
Connector type	Cable or busbar passing through the module's hole
AC Measurement
Frequency	50/60 Hz
Sampling	256 samples/cycle
Measurement cycle (gapless)	Frame 0.2 sec(12 cycle @60 Hz, 10 cycle @50 Hz)
Current	Model	Basic Current(Ib)	Measuring Range (Accuracy guaranteed)	Minimum Measured Value	Hole Dimensions	Weight
	CM-3P
	CM-3P-800A-210	800 A	16.0 A – 960 A	0.80 A	46.0 x 23.0 mm	1,500 g
	CM-3P-800A-210-ZCT	800 A	16.0 A – 960 A	0.80 A	46.0 x 23.0 mm	1,500 g
	CM-3P-630A-145	630 A	12.6 A – 756 A	0.63 A	32.0 x 22.4 mm	1,000 g
	CM-3P-630A-145-ZCT	630 A	12.6 A – 756 A	0.63 A	32.0 x 22.4 mm	1,000 g
	CM-3P-400A-140	400 A	8.0 A – 480 A	0.40 A	32.0 x 22.4 mm	1,000 g
	CM-3P-400A-140-ZCT	400 A	8.0 A – 480 A	0.40 A	32.0 x 22.4 mm	1,000 g
	CM-3P-250A	250 A	5.0 A – 300 A	0.25 A	Ø21.0 x 22.0 mm	140 g
	CM-3P-125A	125 A	2.5 A – 150 A	0.13 A	Ø16.5 x 20.5 mm	130 g
	CM-3P-100A	100 A	2.0 A – 120 A	0.10 A	Ø13.5 x 17.5 mm	115 g
	CM-3P-60A	60 A	1.2 A – 72 A	0.06 A	Ø13.5 x 17.5 mm	115 g
	CM-3P-5A¹	5 A	0.1 A – 6 A	0.01A	Ø10.0 mm	155 g
	CM-3P-5A-ZCT¹	5 A	0.1 A – 6 A	0.01A	Ø10.0 mm	155 g
	CM-1P
	CM-1P-250A	250 A	5.0 A – 300 A	0.25 A	Ø21.0 x 22.0 mm	125 g
	CM-1P-125A	125 A	2.5 A – 150 A	0.13 A	Ø16.5 x 20.5 mm	85 g
	CM-1P-100A	100 A	2.0 A – 120 A	0.10 A	Ø13.5 x 17.5 mm	80 g
	CM-1P-60A	60 A	1.2 A – 72 A	0.06 A	Ø13.5 x 17.5 mm	80 g
	Measurement accuracy	IEC 61557-12 Class 0.5		±0.5 % Reading
	Measurement data	RMS, fundamental, Harmonics (up to the 50th order), Current phasor, THD, TDD, Crest factor, K-factor
		Symmetrical components(positive-, negative-, zero-sequence)², unbalance according to symmetrical components/the NEMA standard²
		Residual curent (RMS, fundamental)²
Leakage current³	Measuring method	Measured by the externally connected ZCT
	Measuring range	10 mA — 2 A
	Accuracy⁴	±2 % Reading ± 2 mA
	Measured data	RMS, fundamental
Power	Active	Accuracy	IEC 61557-12 Class 0.5
	Reactive		IEC 61557-12 Class 1
	Apparent		IEC 61557-12 Class 0.5
	Measured data	Power per phase, total power²
Energy	Active	Accuracy	IEC 62053-21 Class 0.5	Received/delivered active energy
	Reactive		IEC 62053-24 Class 1	Reactive energy in 4 quadrants
	Apparent		IEC 61557-12 Class 0.5
Power factor	Power factor per phase, total power factor², Displacement power factor per phase
Current/Power demand	Peak demand, predicted demand	Demand time can be configured based on the demand subinterval value and the number of subintervals
Current unbalance²	Measured data	Current unbalance according to the NEMA standard
		Zero-sequence, negative-sequence current unbalance
AC Power Quality
Current harmonics THD, TDD	Harmonic order	Up to the 50th order
	Measured data	Magnitude of each harmonic, THD, TDD

1. Accura 2550CM-3P-5A module can be used by connecting it to externally installed CTs (rated secondary current: 5 A).
2. This data is available only on the Accura 2550CM-3P module.
3. This data is available only on the Accura 2550CM-3P module which supports connection to an external ZCT.
4. It indicates the measurement accuracy when the measurement error of an external ZCT is zero.

Accura 2550CMZ-3P/3P4W/1P Power/Leakage Current Measuring Module

Current input
Connector type	Cable or busbar passing through the module's hole
AC Measurement
Frequency	50/60 Hz
Sampling	256 samples/cycle
Measurement cycle (gapless)	Frame 0.2 sec (12cycle @60 Hz, 10cycle @50 Hz)
Current	Model	Basic Current(Ib)	Measuring Range(Accuracy Guaranteed)			Minimum Measured Value	Hole Dimensions	Weight
	CMZ-3P
	CMZ-3P-800A-220	800 A	16.0 A - 960 A			0.80 A	46.0 x 22.9 mm	2,500 g
	CMZ-3P-630A-155	630 A	12.6 A - 756 A			0.63 A	35.0 x 25.4 mm	1,500 g
	CMZ-3P-400A-155	400 A	8.0 A - 480 A			0.40 A	35.0 x 25.4 mm	1,500 g
	CMZ-3P-250A	250 A	5.0 A - 300 A			0.25 A	Ø21.0 x 22.0 mm	300 g
	CMZ-3P-125A	125 A	2.5 A - 150 A			0.13 A	Ø16.5 x 20.5 mm	235 g
	CMZ-3P-100A	100 A	2.0 A - 120 A			0.10 A	Ø13.5 x 17.5 mm	175 g
	CMZ-3P-60A	60 A	1.2 A - 72 A			0.06 A	Ø13.5 x 17.5 mm	175 g
	CMZ-3P4W
	CMZ-3P4W-250A-145	250 A	5.0 A - 300 A			0.25 A	Ø21.0 x 22.0 mm	175 g
	CMZ-1P
	CMZ-1P-250A	250 A	5.0 A - 300 A			0.25 A	Ø21.0 x 22.0 mm	270 g
	CMZ-1P-125A	125 A	2.5 A - 150 A			0.13 A	Ø16.5 x 20.5 mm	155 g
	CMZ-1P-100A	100 A	2.0 A - 120 A			0.10 A	Ø13.5 x 17.5 mm	125 g
	CMZ-1P-60A	60 A	1.2 A - 72 A			0.06 A	Ø13.5 x 17.5 mm	125 g
	Measurement accuracy	IEC 61557-12 Class 0.5		±0.5 % Reading
	Measured data	RMS, fundamental, harmonics (up to the 50th order), current phasor, THD, TDD, crest factor, K-factor
		Symmetrical components(positive, negative, zero-sequence)¹, unbalance based on symmetrical components/the NEMA standard¹
		Residual curent (RMS, fundamental)¹
Leakage current	Measuring method	Measured by the built-in ZCT
	Measuring range	1 mA - 2 A
	Measured data	RMS, fundamental
	Accuracy²	CMZ-3P-800A		±0.5 % Reading ± 60 mA
		CMZ-3P-630A/400A/250A, CMZ-1P-250A		±0.5 % Reading ± 30 mA
		CMZ-3P/1P-125A/100A/60A		±0.5 % Reading ± 20 mA
		CMZ-3P4W-250A-145		±0.5 % Reading ± 30 mA
	Operating range	Up to 120 % of phase current Ib
Power	Active	Accuracy	IEC 61557-12 Class 0.5
	Reactive		IEC 61557-12 Class 1
	Apparent		IEC 61557-12 Class 0.5
	Measured data	Power per phase, the sum of 3-phase power¹ values
Energy	Active	Accuracy	IEC 62053-21 Class 0.5		Received/delivered active energy
	Reactive		IEC 62053-24 Class 1		Reactive energy in 4 quadrants
	Apparent		IEC 61557-12 Class 0.5
Power factor	Power factor per phase, total power factor¹, Displacement power factor per phase
Current/Power demand	Peak demand, predicted demand	Demand time can be configured based on the demand subinterval value and the number of subintervals
Current unbalance¹	Measured data	Current unbalance according to the NEMA standard¹
		Zero-sequence, negative-sequence current unbalance¹
AC Power Quality
Current harmonics THD, TDD	Harmonic order	Up to the 50th order
	Measured data	Magnitude of each harmonic, THD, TDD

1. This data is available only on Accura 2550CMZ-3P and CMZ-3P4W modules.
2. The measurement accuracy is based on the fundamental frequency component of the leakage current.

Accura 2550CMS-2P Split-Core 2-Pole Power Measuring Module

Current Input
Connector type	Cable or busbar passing through the module's hole
AC Measurement
Frequency	50/60 Hz
Sampling	256 samples/cycle
Measurement cycle(gapless)	Frame 0.2 sec(12 cycles @60 Hz, 10 cycles @50 Hz)
Current	Model	Basic Current(Ib)	Measuring Range(Accuracy Guaranteed)			Minimum Measured Value	Hole Dimensions		Weight
	CMS-2P-800A-70	800 A	16.0 A - 960 A			0.80 A	57.5 x 54.2 mm		950 g
	CMS-2P-630A-70	630 A	12.6 A - 756 A			0.63 A	57.5 x 54.2 mm		950 g
	CMS-2P-630A-44	630 A	12.6 A - 756 A			0.63 A	33.5 x 50.6 mm		600 g
	CMS-2P-400A-70	400 A	8.0 A - 480 A			0.40 A	57.5 x 54.2 mm		950 g
	CMS-2P-400A-44	400 A	8.0 A - 480 A			0.40 A	33.5 x 50.6 mm		600 g
	CMS-2P-250A-35	250 A	5.0 A - 300 A			0.25 A	24.5 x 31.0 mm		300 g
	CMS-2P-125A-30	125 A	2.5 A - 150 A			0.13 A	19.5 x 26.1 mm		250 g
	CMS-2P-60A-25	60 A	1.2 A - 72 A			0.06 A	14.5 x 15.3 mm		200 g
	Measurement accuracy	IEC 61557-12 Class 0.5		±0.5 % Reading
	Measured data	RMS, fundamental, harmonics (up to the 50th order), current phasor, THD, TDD, crest factor, K-factor
		Symmetrical components (positive-, negative-, zero-sequence)¹, unbalance based on symmetrical components/the NEMA standard¹
Power	Active	Accuracy	IEC 61557-12 Class 0.5
	Reactive		IEC 61557-12 Class 1
	Apparent		IEC 61557-12 Class 0.5
	Measured data	Power per phase, the sum of 3-phase power¹values
Energy	Active	Accuracy	IEC 62053-21 Class 0.5		Received/delivered active energy
	Reactive		IEC 62053-24 Class 1		Reactive energy in 4 quadrants
	Apparent		IEC 61557-12 Class 0.5
Power factor	Power factor per phase, total power factor¹, Displacement power factor per phase
Current/Power demand	Peak demand, predicted demand	Demand time can be set up according to the demand subinterval value and the number of subintervals
Current unbalance¹	Measured data	Current unbalance according to the NEMA standard¹
		Zero-sequence, negative-sequence current unbalance¹
AC Power Quality
Current harmonics THD, TDD	Harmonic order	Up to the 50th order
	Measured data	Magnitude of each harmonic, THD, TDD
LED Status Indicator
LED Color	LED Operating Status	Description						Indication Priority
Orange	Turned on²	Indicates normal communication between Accura 2550CMS- 2P and Accura 2500M						4
Green	Turned on	Indicates that Accura 2550CMS-2P is selected on Accura 2500D						3
Red	Turned on	Indicates duplicate IDs or the standby ID ³ (factory default ID)						2
	Flashing	Indicates occurrence of an event						1

1. This data is available only when the load mode of the Accura 2550CMS-2P module is set to 3P3W.
2. During a firmware update, the LED flashes orange to indicate the operating status.
3. The CMS-2P's module ID can be configured using the ID Setup button via 「MAIN > SETUP > Chain View」 on Accura 2500D.

Accura 2550CMS/ZM-3P4W/1P3F/1P2F Split-Core Power/Leakage Current Measuring Module

Current Input
Connector type	Cable or busbar passing through the module's hole
AC Measurement
Frequency	50/60 Hz
Sampling	256 samples/cycle
Measurement cycle(gapless)	Frame 0.2 sec(12 cycles @60 Hz, 10 cycles @50 Hz)
Current	Model	Basic Current(Ib)	Measuring Range(Accuracy Guaranteed)		Minimum Measured Value	Hole	Weight
	CMS-3P4W-60A	60 A	3.0 A - 72 A		0.24 A	10.4 x 20.3 mm	430 g
	CMS-1P3F-60A	60 A	3.0 A - 72 A		0.24 A	10.4 x 20.3 mm	430 g
	CMS-1P2F-60A	60 A	3.0 A - 72 A		0.24 A	10.4 x 20.3 mm	350 g
	Measurement accuracy²	IEC 61557-12 Class 0.5		±0.5 % Reading
	Measured data	RMS, fundamental, harmonics (up to the 50th order), current phasor, THD, TDD, crest factor, K-factor
		Symmetrical components (positive-, negative-, zero-sequence)¹, unbalance according to symmetrical components/ the NEMA standard¹
		Residual current (RMS, fundamental)¹
Leakage current	Measuring method	Measured by the built-in ZCT
	Measuring range	1 mA - 2 A
	Measured data	RMS, fundamental
	Accuracy³	ZM-3P4W-60A-DI⁴	±0.5 % Reading ± 10 mA		Hole Dimensions	70.0 x 20.5 mm
		ZM-1P3F-60A-DI	±0.5 % Reading ± 5 mA			Ø21.0 mm
		ZM-1P2F-60A-DI	±0.5 % Reading ± 5 mA			Ø21.0 mm
	Operating range	Up to 120 % of phase current Ib
Power	Active	Accuracy²	IEC 61557-12 Class 0.5
	Reactive		IEC 61557-12 Class 1
	Apparent		IEC 61557-12 Class 0.5
	Measured data	Power per phase, the sum of 3-phase power¹ values
Energy	Active	Accuracy²	IEC 62053-21 Class 0.5		Received/delivered active energy
	Reactive		IEC 62053-24 Class 1		Reactive energy in 4 quadrants
	Apparent		IEC 61557-12 Class 0.5
Power factor	Power factor per phase, total power factor¹, Displacement power factor per phase
Current/ Power demand	Peak demand, predicted demand	Demand time can be configured based on the demand subinterval value and the number of subintervals
Current unbalance¹	Measured data	Current unbalance according to the NEMA standard¹
		Zero-sequence, negative-sequence current unbalance¹
AC Power Quality
Current harmonics THD, TDD	Harmonic order	Up to the 50th order
	Measurement data	Magnitude of each harmonic, THD, TDD

1. This data is available only on the Accura 2550CMS-3P4W module.
2. The split-core CMS module is calibrated with the power line positioned at the top center of the through-hole.
As the location of the power line deviates from this position, measurement errors for current,power, and energy may increase by up to 1 %.
3. It indicates the measurement accuracy of the fundamental frequency component of the leakage current.
4. To ensure accurate leakage current measurements when wiring the 3P4W leakage current measuring module,
all four power lines should be bundled together and passed through the center of the module's hole.

Accura 2550CMM[Z] Three-Phase Power/Leakage Current Measuring Module for MCB

Current Input
Connector type	Cable or busbar passing through the module's hole
AC Measurement
Frequency	50/60 Hz
Sampling	256 samples/cycle
Measurement cycle(gapless)	Frame 0.2 sec (12 cycles @60 Hz, 10 cycles @50 Hz)
Current	Model	Basic Current(Ib)	Measuring Range(Accuracy Guaranteed)	Minimum Measured Value	Hole Dimensions	Weight
	CMM-3P-60A	60 A	1.2 A - 72 A	0.06 A	Ø 10.4 / Ø 5.9 mm	100 g
	CMMZ-3P-60A	60 A	1.2 A - 72 A	0.06 A	Ø 10.5 mm	150 g
	Accuracy	IEC 61557-12 Class 0.5		± 0.5 % Reading
	Measured data	RMS, fundamental, harmonics (up to the 50th order), current phasor, THD, TDD, crest factor, K-factor
		Symmetrical components (positive-, negative-, zero-sequence), unbalance based on symmetrical components/the NEMA standard
		Residual current (RMS, fundamental)
Leakage Current¹	Measuring method		Measured by the built-in ZCT
	Measuring range		1 mA — 2 A
	Measured data		RMS, fundamental
	Accuracy²	CMMZ-3P-60A	±0.5 % Reading ± 10 mA
	Operating range		Up to 120 % of phase current Ib
Power	Active Accuracy	IEC 61557-12 Class 0.5
	Reactive Accuracy	IEC 61557-12 Class 1
	Apparent Accuracy	IEC 61557-12 Class 0.5
	Measured data	Power per phase, the sum of 3-phase power values
Energy	Active Accuracy	IEC 62053-21 Class 0.5		Received/delivered active energy
	Reactive Accuracy	IEC 62053-24 Class 1		Reactive energy in 4 quadrants
	Apparent Accuracy	IEC 61557-12 Class 0.5
Power factor	Power factor per phase, total power factor, Displacement power factor per phase
Current/Power demand	Peak demand, predicted demand	Demand time can be configured based on the demand subinterval value and the number of the demand subintervals
Current unbalance	Measured data	Current unbalance according to the NEMA standard
		Zero-sequence, negative-sequence current unbalance
AC Power Quality
Current harmonics THD, TDD	Harmonic order	Up to the 50th order
	Measured data	Magnitude of each harmonic, THD, TDD

1. This data is available only on the Accura 2550CMMZ module.
2. It indicates the measurement accuracy of the fundamental frequency component of the leakage current.

Accura 2550CMD-1P DC Power Measuring Module

Current Input
Connector type	Cable or busbar passing through the module's hole
DC Measurement
Sampling frequency	12.80 kHz (sampling cycle 78 us)@50 Hz mode
Sampling frequency	15.36 kHz(sampling cycle 65 us) @60 Hz mode
Measurement cycle(gapless)	Frame 0.2 sec
Current	Model	Basic Current(Ib)	Measuring range (Accuracy guaranteed)	Minimum Measured Value	Hole Dimensions	Weight
	CMD-1P-1500A	1,500 Adc	Up to 2,200 Adc	1.50 Adc	A busbar provided	3,000 g
	CMD-1P-750A	750 A	Up to 900 Adc	0.75 Adc	A busbar provided	850 g
	CMD-1P-250A	250 Adc	Up to 300 Adc	0.25 Adc	Ø21.0 x 22.0 mm	125 g
	CMD-1P-125A	125Adc	Up to 150 Adc	0.13Adc	Ø16.5 x 20.5 mm	85 g
	CMD-1P-100A	100 Adc	Up to 120 Adc	0.10 Adc	Ø13.5 x 17.5 mm	80 g
	CMD-1P-60A	60 Adc	Up to 72 Adc	0.06 Adc	Ø13.5 x 17.5 mm	80 g
	Measurement accuracy	±1.0 % Reading ±0.1 % Ib²
	Measurement accuracy due to temperature drift¹	±0.02% Ib/ °C typical		Calibrated at the ambient temperature of 25°C
	Measured data	DC current, RMS current, waveforms
Power	Accuracy	±1.5 % Reading ± 0.15 % Un*Ib^2,3
Power	Measured data	DC power, Real power
Energy	Accuracy	±1.5 % Reading ± 0.15 % Un*Ib^2,3
	Measurement data	DC energy measured by accumulating DC power values(Received/delivered)
	Measurement data	Real energy measured by accumulating real power values(Received/delivered)

1. Errors in current measurement may occur when the operating temperature deviates from the temperature at which the device was calibrated.
2. Ib indicates the basic current for each model.
3. Un indicates the nominal voltage, 277 Vdc. However, the Accura 2500M-VD module has a nominal voltage (Un) of 560Vdc.

Accura 2550PS Auxiliary Power Supply Module

Power Supply¹
Input power supply	Port name		L+, N-,(Ground)
	Connector type		Screw-type terminal (pluggable)
	Wire specification / Torque		2.1 — 3.5 mm² (14 — 12 AWG), copper / Max. 0.6 Nm (6.1 kgf-cm, 5.3 lbf-in)
	Wire temperature rating		70˚C or higher
	Power supply voltage(Us)		AC 100 — 240 V 50/60Hz, DC 100 — 300 V, CATⅡ
	Operating voltage range		0.9 x Us — 1.1 x Us
	Power consumption		Maximum 20 W (based on the input power)
	Inrush current		Peak 31 A, duration: no more than 1 ms (AC 220 V)
			Peak 11 A, duration: no more than 0.2 ms (DC 110 V)
	External input fuse capacity²		2 A, 500 V
Output power supply	Port name		RJ45A, RJ45B: used for power supply to Accura 2550 module
			Aux. Connector(+5V-): screw-type, auxiliary output terminal
	Output voltage		DC 5.0 — 5.4 V
	Supplied power		Maximum 15 W (based on the output power)
Load Status LED Indicator
Load		LED Indicator Color
Less than 50 %		Blue
50 to 80 %		Blue, Yellow
80 to 100 %		Blue, Yellow, Red

1. To ensure proper operation when applying power, Accura 2500M and Accura 2550PS modules should be powered simultaneously using a single switch.
2. When installing a fuse in the power input line, it is recommended to use a UL-listed fuse of Class RK5 or higher, rated at 2A/500V.

General Specifications

Environmental Conditions
Installation location	Indoor
Safe operating temperature	-20 — 70℃(-4 — 158℉)
Operating temperature ¹	-20 — 60℃(-4 — 140℉)
Storage temperature	-40 — 85℃(-40 — 185℉)
Operating humidity	5 — 95%(non—condensing)
Operating altitude	Up to 2,000 m
Ingress protection against dust and water	IEC 60529 IP 54(Accura 2500D)
Warranty Period	2 years

1. Compliant with UL 61010-1 3rd edition

Installed at the incoming line of the industrial control panel, Accura 2500M module performs the main function of the panel.
Voltage Measurement of the Incoming Line
Measures voltage by sensing the AC or DC voltage of the incoming line in the industrial control panel
Measurement Parameters
AC voltage	Line-to-neutral voltage, Line-to-line voltage, and Frequency
	Fundamental voltage, vector diagram(phasor)
	Harmonics¹, THD
	Symmetrical components (positive-, negative-, zero-sequence components)
	Unbalance based on symmetrical components/the NEMA standard
	Residual voltage²
DC voltage	DC voltage, RMS voltage
Power Quality
Dip/Swell¹	RMS voltage refreshed each cycle
PQ Curve¹	RMS voltage refreshed each cycle/SEMI F47-0706, IEC 61000-4-11/34 Class 3, and ITIC
Harmonics¹	Harmonics up to the 50th order, THD
Unbalance	Line-to-neutral/Line-to-line voltage unbalance, unbalance based on symmetrical components
Events
Power quality events	Dip/Swell events, PQ Curve events
	Up to 100 power quality events can be saved.
Measurement events	Voltage connection events³	Phase open	Events triggered by voltage connection failure
		Fuse failure	Events triggered by fuse failures on the line where voltage is measured
	Current events	Events triggered by current values measured by Accura 2550 modules
		Events for each module can be configured via Accura 2500D’s screen.
	Leakage current events⁴	Events triggered by leakage current values measured by Accura 2550 modules
		Events for each module can be configured on Accura 2500D’s screen.
	Voltage events	Events triggered by voltage values measured by Accura 2550DCM module
		Events for each meter can be configured via Accura 2500D’s screen.
	User-defined events	Events that allow users to set input data and operational modes
		Users can set up to 40 events via communication.
	Up to 100 measurement events can be saved.
System events	Events related to module control, communication status, setup, and more
	Up to 1,000 system events can be saved.
Internal Communication with Accura 2500D Module
Dedicated communication	Sends and receives data to and from Accura 2500D with the manufacturer's dedicated protocol
Internal Communication with Accura 2550 Power Measuring Modules
Dedicated communication	Sends the AC or DC voltage data on the incoming line to multiple Accura 2550 modules
	Collects measurement and operational status data from multiple Accura 2550 modules
	Dedicated protocol of the manufacturer
	Number of connectable modules ⁵	In a single group	Up to 30 modules
		In two groups	Up to 40 modules
	Supports communication redundancy via device connections in a ring topology using two ports in Groups 1 and 2
External Communication with the Host System
Ethernet communication	Communicates with the host system with Modbus TCP protocol at 100 Mbps
	Sends measurement data collected from multiple Accura 2550 modules to the host system
	Supports communication redundancy through ring topology using two Ethernet switch ports
	Wiring methods: Star, Daisy-chain, Ring topology(supports RSTP ⁶ )
RS-485 communication	Sends measurement data collected from multiple Accura 2550 modules to the host system
	Communicates with the host system with Modbus RTU protocol at 1,200 / 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 ⁷ bps

Accura 2500D is installed at the front of the industrial control panel. The 5" TFT color LCD screen on the front of the device provides users with data from the Accura 2500M device, as well as measurement and operational status data from multiple Accura 2550 modules via communication. In addition, users can configure all functions of the Accura 2500M and Accura 2550 modules through the touch-enabled TFT color LCD screen of the Accura 2500D module.
Connection with Accura 2500M
Direct connection	Accura 2500D can be attached to or detached from Accura 2500M using its built-in connector at the back.
Connection with a cable	Accura 2500D can be connected to Accura 2500M using an RJ45 communication cable.
Internal Communication with Accura 2500M
Dedicated communication	Sends and receives data to and from Accura 2500M using the manufacturer's dedicated protocol
	Displays data from Accura 2500M as well as measurement and operational status data from multiple Accura 2550 modules
	Functions of the Accura 2500M and Accura 2550 modules can be configured through the Accura 2500D module.

Power and Leakage Current Measurement
Measures various power characteristics using sampled current data from the branch line and sampled voltage data from the incoming line, which is received from Accura 2500M module
Model		Basic current	Feeder
Split-core 3P4W power/leakage current measuring module	CMS-3P4W-60A	60 A	3P4W
	ZM-3P4W-60A-DI¹
Split-core 1P3F power/leakage current measuring module	CMS-1P3F-60A	60 A	1P3F
	ZM-1P3F-60A-DI
Split-core 1P2F power/leakage current measuring module	CMS-1P2F-60A	60 A	1P2F
	ZM-1P2F-60A-DI
AC Measurement Parameter
Current	RMS, fundamental, harmonics, THD, TDD, vector diagram (phasor)
	Crest factor, K-factor
	Symmetrical components², unbalance according to symmetrical components²,current unbalance²
	Residual current (RMS, fundamental)²
Leakage current	Measured by the built-in ZCT
Power	Active power, Reactive power, Apparent power
Energy	Received/delivered Active energy, 4-quadrant Reactive energy, Apparent energy
Power factor	Power factor, Displacement power factor³
Demand	Current/power demand, Peak current/power demand
	Predicted current/power demand
Internal Communication with Accura 2500M
Dedicated communication	Receives sampled voltage data from the incoming line via Accura 2500M
Events⁴
Current events	“Over” or “Under” event triggered by measured current values
Leakage current events	“Over” event triggered by measured leakage current values

Power Measurement
Measures various power characteristics using sampled current data from the branch line and sampled voltage data from the incoming line, which is received from Accura 2500M module
Model		Basic Current
CMM-3P-60A		60 A
CMMZ-3P-60A
AC Measurement Parameters
Current	RMS, fundamental, harmonics, THD, TDD, vector diagram (phasor)
	Crest factor, K-factor
	Symmetrical components, unbalance according to symmetrical components, current unbalance
	Residual current (RMS, fundamental)
Leakage current¹	Measured by the built-in ZCT
Power	Active power, Reactive power, Apparent power
Energy	Received/delivered Active energy, 4-quadrant Reactive energy, Apparent energy
Power factor	Power factor, Displacement power factor²
Demand	Current/power demand, Peak current/power demand
	Predicted current/power demand
Internal Communication with Accura 2500M
Dedicated communication	Receives sampled voltage data from the incoming line via Accura 2500M
Events³
Current events	“Over” or “Under” event triggered by measured current values
Leakage current events¹	“Over” event triggered by measured leakage current values

Module Type	Module Name	Item	Description	Power
Auxiliary power supply module	Accura 2550PS¹	Input power supply	AC 100 - 240 V 50/60 Hz, DC 100 - 300 V	20 W
		Output power supply	DC 5.0 - 5.4 V	15 W
		Function	If the number of connected modules exceeds the power supply capacity of Accura 2500M, additional power must be supplied.