ROOTECH - Energy Solution for Human and Nature

Accura 2500M Main Module

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)
	Unbalance according to 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, Transient Voltage events
	Up to 100 power quality events can be saved.
Measurement events	Voltage connection events³	Phase open	Events on failures in voltage connection
		Fuse fail	Events on fuse failures on the line where voltage is measured
	Current events	Events on current values measured by Accura 2550CM[Z]/CMS/ZM/CMD/DCM modules
		Events for each module can be configured on Accura 2500D’s screen.
	Leakage current events⁴	Events on leakage current values measured by Accura 2550CMZ/CMS/ZM modules
		Events for each module can be configured on Accura 2500D’s screen.
	Voltage events	Events on voltage values measured by Accura 2550DCM
		Events of each meter can be set up on Accura 2500D’s screen.
	Custom events	Events for which users set event input data and event operation modes
		Users can set up to 40 events via communication.
	Up to 100 measurement events can be saved.
Internal Communication with Accura 2500D Module
Dedicated communication	Sends/receives data to/from Accura 2500D with the dedicated protocol of the manufacturer
Internal Communication with Accura 2550 Power Measuring Modules
Dedicated communication	Sends the AC or DC voltage sampling data on the incoming unit to multiple Accura 2550 modules
	Collects data on the measurement and operational status of the device from multiple Accura 2550 modules
	Dedicated protocol of the manufacturer
	Number of connected 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 with 2 ports in the group 1 & 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 connection using 2 Ethernet switch ports
	Wiring methods: Star, Daisy-chain, Ring connection (supports RSTP ⁶ )
RS-485 communication	Communicates with the host system with Modbus RTU protocol at 1,200 – 115,200 bps⁷
	Sends measurement data collected from multiple Accura 2550 modules to the host system

1. Line-to-line voltage harmonics and line-to-neutral voltage harmonics are measured in 3P3W and 3P4W modes, respectively.
2. It is calculated by summing up three-phase line-to-neutral voltages.
3. It is not available when there is any phase connected to earth in 3P3W mode.
4. Leakage current is measured only by power/ leakage current measuring modules with the built-in ZCT.
5. The number of modules that can be connected depends on module types. For more information on module connections,
refer to ⌜Appendix B Module Connection⌟ in the User Guide.
6. RSTP(Rapid Spanning Tree Protocol), IEEE 802.1D-2004
7. At 115,200 bps, a master can communicate with up to 16 slave devices, and the maximum distance between the master and the slave is 600 m.

Accura 2500D Main HMI Module

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

Incoming Line / Branch Line Power Measurement
Measures various power characteristics based on the sampled current data on the incoming line/branch line and the sampled voltage data on the incoming line received from Accura 2500M module
Model		Base Current
CM-3P
CM-3P-800A-210		800A
CM-3P-630A-145		630A
CM-3P-400A-140		400A
CM-3P-250A		250A
CM-3P-125A		125A
CM-3P-100A		100A
CM-3P-60A		60A
CM-3P-5A¹		5A
CM-1P
CM-1P-250A		250A
CM-1P-125A		125A
CM-1P-100A		100A
CM-1P-60A		60A
AC Measurement Parameter
Current	RMS, Fundamental, harmonics, THD, TDD, Vector diagram(phasor)
	Crest factor, K-factor
	Symmetrical components², unbalance according to symmetrical components ², Current unbalance²
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 the sampled voltage data on the incoming line from Accura 2500M
Events⁴
Current events	“Over” or “Under” event on measured current values

1. Accura 2550CM-3P-5A module can be used by externally installing CTs(the rated secondary current: 5A).
2. Only available in Accura 2550CM-3P module.
3. The displacement power factor is provided only through communication.
4. Measurement-related events of Accura 2550 module are managed on Accura 2500M module.

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

Power and Leakage Current Measurement of Incoming/ Branch Line
Measures various power characteristics based on the sampled current data on the incoming line/branch line and the sampled voltage data on the incoming line received from Accura 2500M module
Model	Base Current
CMZ-3P
CMZ-3P-800A-220	800A
CMZ-3P-400A-155	400A
CMZ-3P-250A	250A
CMZ-3P-125A	125A
CMZ-3P-100A	100A
CMZ-3P-60A	60A
CMZ-3P4W
CMZ-3P4W-250A-145	250A
CMZ-1P
CMZ-1P-250A	250A
CMZ-1P-125A	125A
CMZ-1P-100A	100A
CMZ-1P-60A	60A
AC Measurement Parameter
Current	RMS, fundamental, harmonics, THD, TDD, vector diagram(phasor)
	Crest factor, K-factor
	Symmetrical components¹, unbalance according to symmetrical components ¹, current unbalance¹
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 factor²
Demand	Current/power demand, Peak current/power demand
	Predicted current/power demand
Internal Communication with Accura 2500M
Dedicated communication	Receives the voltage sampling data on the incoming line from Accura 2500M
Events³
Current events	“Over” or “Under” event on measured current values
Leakage current events	“Over” event on measured leakage current values

1. It is only supported in the Accura 2550CMZ-3P module.
2. The displacement power factor is provided only through communication.
3. Measurement-related events of Accura 2550 module are managed on Accura 2500M module.

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

Power and Leakage Current Measurement of Incoming/ Branch Line
Measures various power characteristics based on the sampled current data on the incoming line/branch line and the sampled voltage data on the incoming line received from Accura 2500M module
Model		Feeder	Basic current
Accura 2550CMS Split-core power measuring module	CMS-3P4W-60A	3P4W	60 A
	CMS-1P3F-60A	1P3F
	CMS-1P2F-60A	1P2F
Accura 2550ZM Leakage current measuring module	ZM-3P4W-60A-DI¹	3P4W	60 A
	ZM-1P3F-60A-DI	1P3F
	ZM-1P2F-60A-DI	1P2F
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
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 the voltage sampling data on the incoming unit from Accura 2500M
	Sends/receives data to/from Accura 2500D
	Number of connectable modules	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 with 2 ports in the group 1 & 2
Display
LCD features	13 x 18 mm Customized Mono LCD, LED backlight & touch panel
Power Supply
Power supply	Receives control power from Accura 2500M using its built-in connector or an internal communication cable for the display module
Events⁴
Current events	“Over” or “Under” event on measured current values
Leakage current events	“Over” event on measured leakage current values

1. To ensure accurate measurements of leakage current when wiring the 3P4W leakage current measuring module,
you should put together all four power lines and make them pass through the center of its hole.
2. It is only supported on Accura 2550CMS-3P4W module.
3. The displacement power factor is provided only through communication.
4. Measurement-related events of Accura 2550 module are managed on Accura 2500M module.

Accura 2550CMM Three-Phase Power Measuring Module for MCB

Accura 2550CMD-1P DC Power Measuring Module

Accura 2550DCM DC Power Measuring Meter

Accura 2500M Main Module

Power Supply
Port name	L+, N-
Connector type	Terminal block¹(M3.5 / bolt head Ø6)
Wire specs	0.34 - 4.0 mm² (22 - 12 AWG), copper
Power Supply(Us)²	AC 100 - 240 V, DC 100 - 300 V, CAT Ⅱ
Frequency	50/60 Hz
Operating voltage range	0.9 x Us - 1.1 x Us
Power consumption³	Maximum 20W
Inrush current⁴	Peak 31 A, duration: less than 0.001 msec(AC 220 V)
	Peak 11 A, duration: less than 200 usec(DC 110 V)
Voltage Input
Module	Accura 2500M		Accura 2500M-VD¹⁴
Port name	V₁, V₂, V₃, V_N		+Vdc, COM, -Vdc
Connector type	Terminal block ¹(M4 / bolt head Ø7)
Wire specs	0.75 - 6.0 mm² (18 - 10 AWG), copper
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 – 277 V L-N
		AC 60 – 480 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
	Measurement data	Line-to-neutral voltage, Line-to-line voltage
		Fundamental, harmonics(up to the 50th order)⁶
		Vector diagram(phasor), THD, waveforms
		Symmetrical components(positive, negative, zero-sequence)
		Unbalance according to symmetrical components/the NEMA standard
Residual voltage	Measuring method	Calculation of the sum of 3-phase voltage
	Measurement data	RMS, fundamental
	Accuracy/ operating range	±0.5 % Un ⁵/ Up to 277 V L-N
Frequency	Measuring range	42 - 65 Hz
AC Power Quality
Dip/Swell⁶	Measured value/Threshold	RMS voltage refreshed every cycle	Threshold set by users
PQ Curve⁶	Measured value/Threshold	RMS voltage refreshed every cycle	Dip/Swell: 90 % / 110 % of Vref
	Curve type	SEMI F47-0706, IEC 61000-4-11/34 Class 3, ITIC
Voltage harmonics⁶,THD	Harmonic order	Up to the 50th order
	Measurement data	Magnitude of each harmonic, THD
Voltage unbalance	Measurement data	Line-to-neutral voltage / Line-to-line voltage unbalance 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 39us) @50Hz mode
	30.72 kHz(sampling cycle 33us) @60Hz mode
Measurement cycle (gapless)	Basic measurement: Frame 0.2 sec
	Dip/Swell measurement: 1 subframe(20 ms @50 Hz mode, 16.7 ms @60 Hz mode)
Measuring range(accuracy guaranteed)	Up to 300 Vdc		Up to 1,000 Vdc (1DC2W, Bipolar(3W)) Up to 2,000 Vdc (Unipolar(2W))
Max. measuring range	Up to 550 Vdc		Up to 1,000 Vdc (1DC2W, Bipoloar(3W)) Up to 2,000 Vdc (Unipolar(2W))
Measurement accuracy	±0.5 % Reading ± 0.05 % Un ¹³		±0.5 % Reading ± 0.05 % Un ¹³
Minimum 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 (The ports have the same functions)
Communication cable	Internal communication cable for the display module(Cat.5e 24 AWG FTP)⁷		Internal communication cable⁸
Cable length	Up to 3 m		The 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)⁹		1 port / Ta(TRX+), Tb(TRX-)
Connector type	RJ45 connector		Terminal block ¹ (M3.5 / bolt head Ø6)
Communication cable	Ethernet cable Cat 5e FTP, STP, SFTP¹⁰		UL 2919 RS-485 1P/2P 24AWG
Communication speed	100 Base-TX(100 Mbps/Full Duplex)		1,200 - 115,200 bps¹¹
Wiring method	Star, Daisy-chain, Ring connection (RSTP ¹² supported)		Multidrop wiring
Cable length	Maximum 100 m		Maximum 1,219 m (4,000 ft)

1. The maximum screw tightening torque of the barrier-type terminal block is 1.4 Nm(14 kgf-cm, 12 lbf-in).
2. The device conforms to UL standards for the tested AC power supply voltage.
3. It refers to the maximum power consumption when Accura 2500D and Accura 2550 are connected.
4. When installing a fuse at the voltage line, it is recommended to use a fuse above Class RK5 2 A/500 V due to inrush current.
5. Un indicates the basic voltage, 277 V.
6. Line-to-line voltage harmonics and line-to-neutral voltage harmonics are measured in 3P3W and 3P4W modes, respectively.
7. It is provided with the product.
8. It is provided with the product. Additional communication cables needed for ring topology are sold separately.
The conducting wire of the communication cable should be at least 0.205mm² (24 AWG).
It is recommended to keep a distance of over 5 mm from power lines generating high levels of noise.
9. The built-in Ethernet switch allows for daisy-chain connection between Accura 2500M modules without a separate external switch.
10. FTP (Foiled Shield Twisted Pairs), STP (Braided Shield Twisted Pairs), SFTP (Braided Foiled Shield Twisted Pairs)
11. At 115,200 bps, a master can communicate with up to 16 slave devices, and the maximum distance between the master and the slave is 600 m.
12. RSTP (Rapid Spanning Tree Protocol), IEEE 802.1D-2004.
13. Un indicates the basic voltage, 277 Vdc. However, for Accura 2500M-VD module, its basic voltage is 560 Vdc.
14. Accura 2500M-VD module with a voltage divider is used for high voltage measurement.

Accura 2500D Main HMI Module

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

Current Input
Connector type	Cable or busbar passing through the hole of the module
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-630A-145	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-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-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
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 power² 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 factor², 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 the demand 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
	Measurement data	Magnitude of each harmonic, THD, TDD

1. Accura 2550CM-3P-5A module can be used by externally installing CTs(the rated secondary current: 5A).
2. It is only available on Accura 2550CM-3P module.

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

Current input
Connector type	Cable or busbar passing through the hole of the module
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-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
	Measurement 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
Leakage current	Measuring method	Measured by the built-in ZCT
	Measuring range	1 mA - 2 A
	Measurement data	RMS, fundamental
	Accuracy	CMZ-3P-800A		±0.5 % Reading ± 60 mA
		CMZ-3P-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 power² 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 set up according to the demand subinterval value and the number of the demand 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. It is only supported in Accura 2550CMZ-3P module.
2. It indicates the measurement accuracy of the fundamental frequency component of leakage current.

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

Current Input
Connector type	Cable or busbar passing through the hole of the module
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 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, zerosequence)¹, unbalance according to symmetrical components/ the NEMstandard¹
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 set up according to the demand subinterval value and the number of demand 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. It is only supported in Accura 2550CMS-3P4W module.
2. The split-core CMS module has been calibrated under the condition where the power line passes through the top
center of its hole. As the location of the power line is away from the top center position of the hole, errors in current,
power, and energy measurements can increase by up to 1 %.
3. It indicates the measurement accuracy of the fundamental frequency component of leakage current.
4. To ensure accurate measurements of leakage current when wiring the 3P4W leakage current measuring module,
you should put together all four power lines and make them pass through the center of its hole.

Accura 2550CMM Three-Phase Power Measuring Module for MCB

Current Input
Connector type	Cable or busbar passing through the hole of the module
AC Measurement
Frequency	50/60 Hz
Sampling	256 samples/cycle
Measurement cycle(gapless)	Frame 0.2sec (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 10.5 / Ø 5.9 mm	100 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 according to symmetrical components/the NEMA standard
		Residual current (RMS, fundamental)
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 set up according to 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

Accura 2550CMD-1P DC Power Measuring Module

Current Input
Connector type	Cable or busbar passing through the hole of the module
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	Base 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 % Ib
	Measurement accuracy due to temperature drift	±0.02% Ib/ °C typical		Calibrated at the ambient temperature of 25°C
	Measurement data	DC current, RMS current, waveforms
Power	Accuracy	±1.5 % Reading ± 0.15 % Un*Ib^2,3
Power	Measurement data	DC power, Real power
Energy	Accuracy	±1.5 % Reading ± 0.15 % Un*Ib
	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 might occur as the temperature changes based on the temperature applied for device calibration.
2. The basic voltage Un of Accura 2500M module is 277 Vdc.
3. The basic voltage Un of Accura 2500M-VD module is 560 Vdc.

Accura 2550DCM DC Power Measuring Meter

Voltage Input
Port name	Power supply side(S) +, - / Load side(L) +, -
Connector type	Bus bar terminal block	Bus bar 12 x 3 mm	SEMS bolt M5 x 10
DC Measurement
Sampling frequency	12.80 kHz(sampling cycle 78us) @50Hz mode
	15.36 kHz(sampling cycle 65us) @60Hz mode
Measurement cycle(gapless)	Frame 0.2 sec
Voltage	Model	Basic Voltage(Un)	Measuring Range (Accuracy guaranteed)	Minimum Measured Value	Weight
	DCM-500V-80A	500 Vdc	Up to 550 Vdc	5.0 Vdc	250 g
	DCM-50V-80A	50 Vdc	Up to 55 Vdc	0.5 Vdc	250 g
	Measurement Accuracy	±0.5% Reading ± 0.05% Un
	Measurement data	DC voltage, RMS voltage, waveforms
Current	Model	Basic Current(Ib)	Measuring Range (Accuracy guaranteed)	Minimum Measured Value
	DCM-500V-80A	80 Adc	Up to 100 Adc	0.08 Adc
	DCM-50V-80A
	Measurement accuracy	±1.0 % Reading ± 0.1 % Ib
	Measurement accuracy due to temperature drift¹	±0.02 % Ib / ℃ typical	Calibrated at the ambient temperature of 25℃
	Measurement data	DC current, RMS current, waveforms
Power / Energy	Measurement accuracy	±1.5 % Reading ± 0.15 % Un*Ib
	Measurement data	DC energy measured by accumulating DC power values(Received/Delivered)
		Real energy measured by accumulating real power values(Received/Delivered)
Measurement events	Event type	Voltage events, Current events
	Measuring time	20 ms @50 Hz, 16.7 ms @60Hz
Digital Output(DO)
Port name	DO, DO_G
Connector type	PCB terminal block (M2.6 / wire strip length 5 – 6 mm)
Wire specs / torque	0.14 – 2.5 mm²(26 – 14 AWG), copper / max. 0.34 Nm (3.5 kgf-cm, 3 lbf-in)
Output type	Latch, Periodic pulse
Minimum pulse cycle	0.2 sec
Minimum pulse width	0.1 sec
Insulation	AC 2,500 V for 1 minute
Maximum rating	DC 60 V 350 mA (max. 1 A)

1. Errors in current measurement might occur as the temperature changes based on the temperature applied
for temperature calibration.

General Specifications

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 on Accura 2500M device, as well as measurement and operational status data of multiple Accura 2550 modules via communication. In addition, users can set all functions of Accura 2500M and Accura 2550 modules through the TFT Color LCD screen of Accura 2500D module, which offers the touch function.
Connection with Accura 2500M
Combined installation	Accura 2500M can be attached/detached to/from Accura 2500D using its built-in connector.
Connection with a cable	It can be connected with Accura 2500M using an RJ45 communication cable.
Internal Communication with Accura 2500M
Dedicated communication	Sends/ receives data to/ from Accura 2500M via the dedicated protocol of the manufacturer
	Displays data on Accura 2500M as well as measurement and operational status data on multiple Accura 2550 modules
	Functions of Accura 2500M and Accura 2550 modules can be set on Accura 2500D module.

Environmental Conditions
Installation location	Indoor
Operating temperature	-20 – 70℃(-4 – 158℉)
Safe 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

Power Measurement of Incoming/ Branch Line
Measures various power characteristics based on the sampled current data on the incoming line/branch line and the sampled voltage data on the incoming line received from Accura 2500M module
Model		Basic Current (Ib)
CMM-3P-60A		60 A
AC Measurement Parameter
Current	RMS, fundamental, harmonics, THD, TDD, vector diagram (phasor)
	Crest factor, K-factor
	Residual current (RMS, fundamental)
Power	Active power, Reactive power, Apparent power
Energy	Received/delivered Active energy, 4-quadrant Reactive energy, Apparent energy
Power factor	Power factor, Displacement power factor¹
Demand	Current/power demand, Peak current/power demand
	Predicted current/power demand
Internal Communication with Accura 2500M
Dedicated communication	Receives the voltage sampling data on the incoming unit from Accura 2500M
Events²
Current events	“Over” or “Under” event on measured current values

Branch Line Power Measurement
Measures various power characteristics based on the sampled current data on the branch line and the sampled voltage data on the incoming line received from Accura 2500M module
Model		Basic Current (Ib)	Maximum Current
CMD-1P-1500A		1,500 Adc	2,200 Adc
CMD-1P-750A		750 Adc	900 Adc
CMD-1P-250A		250 Adc	300 Adc
CMD-1P-125A		125 Adc	150 Adc
CMD-1P-100A		100 Adc	120 Adc
CMD-1P-60A		60 Adc	72 Adc
DC Measurement Parameter
Current	DC current, RMS current, waveforms
Power	DC power, Real power
Energy	Received/delivered DC energy, Received/delivered Real energy
Internal Communication with Accura 2500M
Dedicated communication	Receives the voltage sampling data on the incoming unit from Accura 2500M
Events¹
Current events	“Over” or “Under” event on measured current values

Direct DC Voltage/Current/Power Measurement
Measures various power characteristics based on the sampled voltage/current data collected by directly sensing voltage/current.
Model	Basic Voltage	Basic Current	Maximum Voltage	Maximum Current
DCM-500V-80A	500 Vdc	80 Adc	550 Vdc	100 Adc
DCM-50V-80A	50 Vdc	80 Adc	60 Vdc	100 Adc
DC Measurement Parameters
Voltage	DC voltage, RMS voltage, waveforms
Current	DC current, RMS current
Power	DC power, Real power
Energy	Received/Delivered DC energy, Received/delivered Real energy
Internal Communication with Accura 2500M
Dedicated communication	Sends measurement and operational status data to Accura 2500M
	Number of connectedmodules¹	In a single group	Up to 5 modules
		In two groups	Up to 10 modules
	Supports communication redundancy via device connections in a ring topology
Events
Voltage events	“Over” or “Under” event on measured voltage values
Current events	“Over” or “Under” event on measured current values

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