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Accura 2300 Digital Power Meter

Voltage Measurement in the Incoming Feeder
Measures voltage by sensing voltage in the incoming feeder in industrial control panels
Display
Displays the measurement data of Accura 2300, as well as the data collected from Accura 2350 modules on the LCD screen¹
Measurement Parameters
Voltage	Line-to-neutral voltage, Line-to-line voltage, Frequency, Fundamental^2,3, Harmonics^2,3, THD
	Vector diagram(phasor)³, Residual voltage ^3,4
	Unbalance according to symmetrical components(zero sequence or negative sequence)³/the NEMA standard³
Temperature	Measures the temperature⁵ of Accura 2300 with a sensor located on the side of the module
Power Quality
Dip(Sag), Swell	RMS voltage values measured over 1 cycle (refreshed every half cycle)
Harmonics	Up to the 50th⁶ order
Unbalance³	Line-to-neutral/Line-to-line voltage unbalance, zero-sequence/negative-sequence unbalance
Measurement Events
Type of Event	Dip(Sag), Swell events
	Phase open events³, Fuse fail events, Over temperature events, Over current events
	Over leakage current events, Over demand current events, Over power events
	DI events⁷, User-defined events
Max number of event logs	100
Internal Communication with Accura 2350 Modules
Dedicated communication	Sends sampled voltage data to multiple Accura 2350 modules
	Collects measurement data from multiple Accura 2350 modules
	Number of Accura 2350 modules connected to Accura 2300	Max. 15 modules per port⁸
	Total length¹⁰ of the 6C telephone⁹ line between Accura 2300 and Accura 2350 modules	Max. 6 m per port
External Communication with the Host System
Ethernet	Performs communication via Modbus TCP protocol at 100 Mbps Full duplex
	Ethernet switching using 2 ports
	Wiring mode: Star, Daisy-chain, Ring topology(RSTP¹¹ supported)
RS-485	Performs communication via Modbus RTU protocol at 1,200 / 2,400/ 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 bps¹²
Digital Input/Output¹³
Digital input	2 channels, Dry contact
Digital output	1 channel, Form A relay
Power Supply
Power supply voltage¹⁴	AC 100 – 240 V, DC 100 – 300 V, CAT II
Frequency	50/60 Hz

1. The LCD screen only shows the measurement data of the selected Accura 2350 module.
2. It indicates the line-to-neutral voltage and line-to-line voltage values in 3P4W mode and 3P3W mode, respectively.
3. The data are not displayed on the LCD screen of Accura 2300 and are provided only via communication.
4. The residual voltage is the RMS value calculated by summing the three-phase voltage values.
5. Temperature measurement is not for fire detection, but for reference only.
6. The harmonic data provided via communication include harmonics up to the 40th order.
7. If you choose the RS-485 option when ordering Accura 2300, DI events are not available.
8. Up to 15 Accura 2350-3P/1P power measuring modules can be connected to each port (RJ12-1, RJ12-2) of Accura 2300.
For details about connecting Accura 2300 to special-purpose modules, refer to the individual user manuals of special-purpose modules.
9. It is provided with the product. The conducting wire of the 6C telephone line should be at least 0.128 mm² (26 AWG).
It is recommended to keep a distance of over 5 mm from power lines generating high levels of noise to prevent interference.
10. It indicates the maximum length of the 6C telephone line used to connect Accura 2300 to all Accura 2350 modules through
each port(RJ12-1 or RJ12-2) on Accura 2300.
11. RSTP(Rapid Spanning Tree Protocol), IEEE 802.1D-2004
12. At 115,200 bps, a master can communicate with up to 16 slave devices within a maximum distance of 600 m.
13. If you choose the RS-485 option when ordering Accura 2300, the product comes with the RS-485 communication port
instead of digital input/output ports.
14. The device conforms to UL standards for the tested AC power supply voltage.

Accura 2350-3P/1P/1PSH Power Measuring Module

Power Measurement in Branch Loads/ Main Incoming Feeder
Measures various power characteristics based on the sampled current data measured in the incoming feeder or branch load, as well as the sampled voltage data received from Accura 2300 module
Model		Basic Current
Three-phase	Accura 2350-3P-250A-105	250 A
	Accura 2350-3P-125A-90	125 A
	Accura 2350-3P-100A-75	100 A
	Accura 2350-3P-60A-75	60 A
	Accura 2350-3P-CT5A-75¹	CT5 A
Single-phase	Accura 2350-1P-250A-105	250 A
	Accura 2350-1P-125A-60	125 A
	Accura 2350-1P-100A-50	100 A
	Accura 2350-1P-60A-50	60 A
	Accura 2350-1P-50A-35	50 A
	Accura 2350-1P-30A-35	30 A
Single-phase single-hole	Accura 2350-1PSH-50A-35	50 A
	Accura 2350-1PSH-30A-35	30 A
Measurements
Current	RMS, Fundamental, THD, TDD, Harmonics², Residual current³, Leakage current
	Vector diagram(phasor)², Crest factor², K-factor²
	Unbalance according to symmetrical components (zero sequence or negative sequence)³/ the NEMA standard³
Power	Active power, Reactive power, Apparent power
Energy	Active energy(Received/Delivered/Net/Sum), Reactive energy ², Apparent energy ²
Power factor	Power factor
Demand	Current/power demand, Peak current/power demand, Predicted current/power demand²
Internal Communication with Accura 2300
Dedicated communication	Receives sampled voltage data from Accura 2300
	Sends measurement and operational status data to Accura 2300
Power Supply
Power supply voltage	Receives power from Accura 2300

1. If the rated current exceeds 250 A, you should use Accura 2350-3P-CT5A-75 module with external CTs(the secondary current rating: 5 A).
2. The data are not displayed on the LCD screen of 2300 and are provided only via communication.
3. The data are available only when performing three-phase measurements.

Accura 2350-3PSC/1PSC/1PSCSH Split-core Power Measuring Module

Power Measurement in Branch Loads/ Main Incoming Feeder
Measures various power characteristics based on the sampled current data measured in the incoming feeder or branch load, as well as the sampled voltage data received from Accura 2300 module
Model		Basic Current
Split-core three-phase	Accura 2350-3PSC-250A-105	250 A
	Accura 2350-3PSC-125A-90	125 A
	Accura 2350-3PSC-60A-75	100 A
	Accura 2350-3PSC-CT5A-90¹	CT 5 A
Split-core single-phase	Accura 2350-1PSC-250A-105	250 A
	Accura 2350-1PSC-125A-60	125 A
	Accura 2350-1PSC-60A-50	60 A
Split-core single-phase single-hole⁴	Accura 2350-1PSCSH-800A	800 A
	Accura 2350-1PSCSH-630A	630 A
	Accura 2350-1PSCSH-400A	400 A
Measurements
Current	RMS, Fundamental, THD, TDD, Harmonics², Residual current³, Leakage current
	Vector diagram(phasor)², Crest factor², K-factor²
	Unbalance according to symmetrical components (zero sequence or negative sequence)³/ the NEMA standard³
Power	Active power, Reactive power, Apparent power
Energy	Active energy(Received/Delivered/Net/Sum), Reactive energy ², Apparent energy ²
Power factor	Power factor
Demand	Current/power demand, Peak current/power demand, Predicted current/power demand²
Internal Communication with Accura 2300
Dedicated communication	Receives sampled voltage data from Accura 2300
	Sends measurement and operational status data to Accura 2300
Power Supply
Power supply voltage	Receives power from Accura 2300

1. If the rated current exceeds 250 A, you should use Accura 2350-3PSC-CT5A-90 module with external CTs(the secondary current rating: 5 A).
2. The data are not displayed on the LCD screen of 2300 and are provided only via communication.
3. The data are available only when performing three-phase measurements.
4. Three-phase measurements can be performed by installing one Accura 2350-1PSCSH module for each phase.
However, in 3P3W mode you can perform three-phase measurements by installing two Accura 2350-1PSCSH modules for phases A and C.

TM-3P/1P Terminal Block

Accura 2300 Digital Power Meter

Power Supply
Port name	L+, N-
Connector type	Barrier-type terminal block (M3.5 / bolt head size Ø6)
Wire specs / torque	0.34 – 4.0 mm²(22 – 12 AWG), copper / Max. 1.4 Nm (14 kgf-cm, 12 lbf-in)
Wire temp rating	Above 70 °C
Power supply¹	AC 100 – 240 V, DC 100 – 300 V, CAT II
Frequency	50/60 Hz
Withstand voltage	AC 3,000 V RMS, 60 Hz for 1 minute
Operating envir.	Pollution degree 2
Power consumption	Max. 20 W	Varies by the number of connected Accura 2350 modules
Inrush current²	Peak 31 A, duration no more than 1 msec (AC 220 V)
	Peak 11 A, duration no more than 200 μsec (DC 110 V)
Ground Wiring
Port name
Connector type	Barrier-type terminal block (M3.5 / bolt head size Ø6)
Wire specs / Torque	2.5 – 4.0 mm²(14 – 12 AWG), copper / Max. 1.4 Nm (14 kgf-cm, 12 lbf-in)
Wire temp rating	Above 70 °C
Voltage Input
Port name	V₁, V₂, V₃, V_N
Connector type	Barrier-type terminal block (M4 / bolt head size Ø7)
Wire specs / Torque	0.34 – 2.5 mm²(22 – 14 AWG), copper / Max. 1.1 Nm (12 kgf-cm, 10 lbf-in)
Wire temp rating	Above 70 °C
Burden	0.01 VA/phase @ 220 V
Withstand voltage	AC 3,000 V RMS, 60 Hz for 1 minute
Impedance	10 MΩ/phase
Meas. category	Category Ⅲ
Internal Communication with Accura 2350 Modules
Dedicated communication	Connected with multiple Accura 2350 modules
	Port name	RJ12–1, RJ12–2 (2 ports)
	Connector type	RJ12
	Protocol	Dedicated protocol of the manufacturer
	Number of connectable modules	Max. 15 modules per port³
	Total length⁵ of 6C telephone line⁴	Max. 6 m per port
External Communication with the Host System
Ethernet	Port name	Ethernet1, Ethernet2 (2 ports)
	Connector type	RJ45
	Protocol	Modbus TCP
	Ethernet cable	STP(Braided Shielded Twisted Pairs) / SFTP(Braided Foiled Shielded Twisted Pairs) Cat 5e
	Comm. speed	100 Base–TX(100 Mbps/Full Duplex)
	Wiring mode	Star, Daisy-Chain, Ring topology
RS–485	Port name	Ta(TRX+), Tb(TRX-), (Ground)
	Connector type	Screw-type terminal block (pluggable)
	Protocol	Modbus RTU
	Wire specs	UL 2919 RS-485 1P/2P 0.25 – 4.0 mm²(24 – 12 AWG), Braided shielded twisted pairs
	Cable length	Up to 1,219 m(4,000 ft)
	Baud rate	1,200 / 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200⁶ bps
	Number of connectable modules	Max. 32 modules per bus⁶
Digital Input/Output⁷
Digital input	Port name	DI₁, DI₂, DI_G
	Connector type	Barrier-type terminal block (M3 / bolt head size Ø5.5)
	Input type	2 channels, Dry contact(common ground)
	Wire specs / torque	0.34 – 2.5 mm²(22 – 14 AWG), copper / Max. 0.9 Nm (9.2 kgf-cm, 8.0 lbf-in)
	Rating	DC 5 V (self-excitation)
	Isolation	Max. 300 V
	Min. pulse width	1 sec
Digital output	Port name	DO, DO_G
	Connector type	Barrier-type terminal block (M3 / bolt head size Ø5.5)
	Wire specs / torque	0.34 – 2.5 mm²(22 – 14 AWG), copper / Max. 0.9 Nm (9.2 kgf-cm, 8.0 lbf-in)
	Output contact	1 channel, Form A relay
	Output type	Latch, Uncountable/Countable Pulse⁸, Periodic Pulse⁸
	Isolation	AC 3,000 V for 1 minute
	Max. rating	AC 240 V 5 A, DC 110 V 0.3 A, DC 30 V 5 A
Voltage Measurement
Wiring mode	3P4W, 3P3W, 1P3W, 1P2W
Sampling rate	512 samples/cycle
Frequency meas.	42 – 69 Hz
Voltage	Measuring range⁹ (accuracy guaranteed)	AC 35 – 277 V L-N (Line-to-neurtral),
		AC 60 – 480 V L-L (for unearthed Delta¹⁰ & Y systems)
	Accuracy	±0.2 % Reading
	Min. measured value	AC 5 V L-N / 9 V L-L
	Measurement data	Line-to-neutral voltage, Line-to-line voltage, Frequency, Fundamental^11,12, Harmonics^11,12 ,THD
		Vector diagram (phasor)¹², Residual voltage^{12, 13}
		Unbalance according to symmetrical components (zero sequence or negative sequence)¹²/the NEMA standard¹²
Power Quality
Dip(Sag), Swell	RMS voltage values measured over 1 cycle(refreshed every half cycle)
Voltage harmonics	Harmonic order	Up to the 50th¹⁴order
	Measurement data	THD, Magnitude of each harmonic
Voltage unbalance¹²	Line-to-neutral/Line-to-line voltage unbalance according to the NEMA standard
	Zero-sequence/negative-sequence voltage unbalance
General
Temperature sensor¹⁵	Located on the side of the device
Weight	550 g

1. The device conforms to UL standards for the tested AC power supply voltage.
2. When installing fuses on the power line, it is recommended to use UL listed Class RK5 fuses above 2 A/500 V.
3. Accura 2300 can be connected with up to 15 Accura 2350 3P/1P modules per port(RJ12-1, RJ12-2).
When connecting the device to special-purpose modules, refer to the individual manual for each module.
4. It is provided with the product. 4C telephone lines cannot be used.
The conducting wire of the 6C telephone line should be at least 0.128 mm² (26 AWG).
It is recommended to keep a distance of over 5 mm from power lines generating high levels of noise to prevent interference.
5. It indicates the maximum length of the 6C telephone line used to connect Accura 2300 to all Accura 2350 modules through
each port (RJ12-1 or RJ12-2) on Accura 2300.
6. At 115,200 bps, a master can communicate with up to 16 slave devices within a maximum distance of 600 m.
7. If you select the RS-485 communication option when ordering Accura 2300, the product comes with the RS-485 port.
Thus, DI/DO ports are unavailable.
8. Each pulse features a pulse period and pulse On time.
9. It indicates the device’s input voltage range, thus the primary voltage refers to the value obtained by multiplying it by
the PT ratio when using external PTs.
10. For Delta connections, do not exceed 480 V ungrounded or 240 V corner grounded.
11. It indicates the line-to-neutral voltage and line-to-line voltage values in 3P4W mode and 3P3W mode, respectively.
12. The data are not displayed on the LCD screen of Accura 2300 and are provided only via communication.
13. The residual voltage is the RMS value calculated by summing the three-phase voltage values.
14. The harmonic data provided via communication include harmonics up to the 40th order.
15. It measures temperature not for fire monitoring but for reference only.

Accura 2350-3P/1P/1PSH Power Measuring Modules

Current Input
Connector type	Through-hole type
Wire size	Selectable according to hole dimensions
Measurement
Frequency measurement	42 – 69 Hz
Sampling	FFT calculation (harmonic measurement)		64 samples/cycle
	RMS calculation (basic measurement)		32 samples/cycle
Current	Model		Basic Current	Measuring Range(Accuracy guaranteed)	Min. Meas.Value	Hole Dimensions	Weight
	Accura 2350-3P-250A-105		250 A	1 A - 300 A	250 mA	Ø21.0 mm	217 g
	Accura 2350-3P-125A-90		125 A	500 mA - 150 A	125 mA	Ø16.5 mm	196 g
	Accura 2350-3P-100A-75		100 A	400 mA - 120 A	100 mA	Ø13.5 mm	155 g
	Accura 2350-3P-60A-75		60 A	240 mA - 72 A	60 mA	Ø13.5 mm	155 g
	Accura 2350-3P-CT5A-75¹		CT 5 A	CT20 mA - CT 6 A²	CT 5 mA	Ø13.5 mm	155 g
	Accura 2350-1P-250A-105		250 A	1 A - 300 A	250 mA	Ø21.0 mm	217 g
	Accura 2350-1P-125A-60		125 A	500 mA - 150 A	125 mA	Ø16.4 mm	99 g
	Accura 2350-1P-100A-50		100 A	400 mA - 120 A	100 mA	Ø13.5 mm	85 g
	Accura 2350-1P-60A-50		60 A	240 mA - 72 A	60 mA	Ø13.5 mm	85 g
	Accura 2350-1P-50A-35		50 A	200 mA - 60 A	50 mA	Ø8.9 mm	74 g
	Accura 2350-1P-30A-35		30 A	120 mA - 36 A	30 mA	Ø8.9 mm	74 g
	Accura 2350-1PSH-50A-35		50 A	200 mA - 60 A	50 mA	Ø9.0 mm	71 g
	Accura 2350-1PSH-30A-35		30 A	120 mA - 36 A	30 mA	Ø9.0 mm	71 g
	Accuracy		±0.2 % Reading
	Measured data		RMS, Fundamental, THD, TDD, Harmonics³, Residual current⁴, Leakage current
			Vector diagram(phasor)³, Crest factor³, K-factor³
			Unbalance according to symmetrical components (zero sequence or negative sequence)⁴/ the NEMA standard⁴
Leakage current	Leakage current input		External voltage-output ZCT, 200 mA/100 mV @1.2 kΩ burden
	Minimum measured current		10 mA
	Accuracy⁵/Measuring range		±2 % Reading + 2 mA / Up to 1 A
Power	Active	Accuracy	IEC 61557-12 Class 0.5
	Reactive		IEC 61557-12 Class 1
	Apparent		IEC 61557-12 Class 0.5
Energy	Active	Accuracy	IEC 62053-22 Class 0.5S
		Measured data	Received/Delivered/Net/Sum(total) energy
	Reactive³	Accuracy	IEC 62053-24 Class 1
		Measured data	Positive/Negative/Net/Sum(total) energy
	Apparent³	Accuracy	IEC 61557-12 Class 0.5
Power factor	Power factor
Demand	Current/Power		Demand, Peak demand, Predicted demand^3,6
Power Quality
Current harmonics	Harmonic order		Up to the 31st harmonic
	Measured data		THD, TDD, magnitude of each harmonic³
Current unbalance⁴	Current unbalance according to the NEMA standard
	Zero-sequence/negative-sequence current unbalance

1. If the rated current exceeds 250 A, you should use Accura 2350-3P-CT5A-75 module with external CTs (the secondary current rating: 5 A).
2. It indicates the current input range for the CT secondary.
3. The data are not displayed on the LCD screen of Accura 2300 and are provided only via communication.
4. The data are available only when performing three-phase measurements.
5. It indicates the measurement accuracy when the measurement error of an external ZCT is zero.
6. The predicted demand is calculated under the assumption that the currently measured value will remain constant for
the remainder of the subinterval within the demand subinterval.

Accura 2350-3PSC/1PSC Power Measuring Modules

Current Input
Connector type	Through-hole type
Wire size	Selectable according to hole dimensions
Measurement
Frequency measurement	42 – 69 Hz
Sampling	FFT calculation (harmonic measurement)		64 samples/cycle
	RMS calculation (basic measurement)		32 samples/cycle
Current	Model		Basic Current	Measuring Range(Accuracy guaranteed)	Min. Meas. Value	Hole Dimensions	Weight
	Accura 2350-3PSC-250A-105		250 A	2.50 A - 300 A	1.67 A	23.0 x 31.7 mm	428 g
	Accura 2350-3PSC-125A-90		125 A	1.25 A - 150 A	0.83 A	18.2 x 31.7 mm	390 g
	Accura 2350-3PSC-60A-75		60 A	0.60 A - 72 A	0.40 A	13.4 x 31.7 mm	325 g
	Accura 2350-3PSC-CT5A-90¹		CT 60 A	CT 50 mA - CT 6 A²	CT 33 mA	6.2 x 6.5mm(A,C)	244 g (excluding mounting wings)
						6.2 x 7.7 mm(B)³
	Accura 2350-1PSC-250A-105		250 A	2.50 A - 300 A	1.67 A	23.0 x 31.7 mm	428 g
	Accura 2350-1PSC-125A-60		125 A	1.25 A - 150 A	0.83 A	17.9 x 31.7 mm	188 g
	Accura 2350-1PSC-60A-50		60 A	0.60 A - 72 A	0.40 A	13.0 x 31.7 mm	158 g
	Accuracy		±0.5 % Reading⁴
	Measured data		RMS, Fundamental, THD, TDD, Harmonics⁵, Residual current⁶, Leakage current
			Vector diagram(phasor)⁵, Crest factor⁵, K-factor⁵
			Unbalance according to symmetrical components(zero sequence or negative sequence)⁶/the NEMA standard⁶
Leakage current	Leakage current input		External voltage-output ZCT, 200 mA/100 mV @1.2 kΩ burden
	Minimum measured current		10 mA
	Accuracy⁷/Measuring range		±2 % Reading + 2 mA / Up to 1 A
Power	Active	Accuracy	IEC 61557-12 Class 0.5
	Reactive		IEC 61557-12 Class 1
	Apparent		IEC 61557-12 Class 0.5
Energy	Active	Accuracy	IEC 62053-22 Class 0.5S
		Measured data	Received/Delivered/Net/Sum(total) energy
	Reactive⁵	Accuracy	IEC 62053-24 Class 1
		Measured data	Positive/Negative/Net/Sum(total) energy
	Apparent⁵	Accuracy	IEC 61557-12 Class 0.5
Power factor	Power factor
Demand	Current/Power		Demand, Peak demand, Predicted demand^5,8
Power Quality
Current harmonics	Harmonic order		Up to the 31st harmonic
	Measured data		THD, TDD, magnitude of each harmonic⁵
Current unbalance⁶	Current unbalance according to the NEMA standard
	Zero-sequence/negative-sequence current unbalance

1. If the rated current exceeds 250 A, you should use Accura 2350-3PSC-CT5A-90 module with external CTs(the secondary current rating: 5 A).
2. It indicates the current input range for the CT secondary.
3. The middle hole of the module(Phase B) is slightly larger than other two holes(phases A and C) to accommodate the installation of two external CTs.
4. A maximum measurement error of ±1 % may occur depending on the position of the hole through which the cables pass.
5. The data are not displayed on the LCD screen of Accura 2300 and are provided only via communication.
6. The data are available only when performing three-phase measurements.
7. It indicates the measurement accuracy when the measurement error of an external ZCT is zero.
8. The predicted demand is calculated under the assumption that the currently measured value will remain constant for
the remainder of the subinterval within the demand subinterval.

Accura 2350-1PSCSH Power Measuring Modules

Current Input
Connector type	Through-hole type
Wire size	Selectable according to hole dimensions
Measurement
Frequency measurement	42– 69 Hz
Sampling	FFT calculation (harmonic measurement)		64 samples/cycle
	RMS calculation (basic measurement)		32 samples/cycle
Current	Model		Basic Current	Measuring Range(Accuracy guaranteed)	Min Meas.Value	Hole Dimensions	Weight
	Accura 2350-1PSCSH-800A		800 A	3.20 A - 960 A	0.80 A	43.9 x 45.1 mm	569 g
	Accura 2350-1PSCSH-630A		630 A	2.52 A - 756 A	0.63 A	33.5 x 41.2 mm	383 g
	Accura 2350-1PSCSH-400A		400 A	1.60 A - 480 A	0.40 A	33.5 x 41.2 mm	383 g
	Accuracy		±0.2 % Reading
	Measured data		RMS, Fundamental, THD, TDD, Harmonics¹, Residual current², Leakage current
			Vector diagram(phasor)¹, Crest factor¹, K-factor¹
			Unbalance according to symmetrical components(zero sequence or negative sequence)²/ the NEMA standard²
Leakage current	Leakage current input		External voltage-output ZCT, 200 mA/100 mV @1.2 kΩ burden
	Minimum measured current		10 mA
	Accuracy³/Measuring range		±2 % Reading + 2 mA / Up to 1 A
Power	Active	Accuracy	IEC 61557-12 Class 0.2
	Reactive		IEC 61557-12 Class 1
	Apparent		IEC 61557-12 Class 0.2
Energy	Active	Accuracy	IEC 62053-22 Class 0.2S
		Measured data	Received/Delivered/Net/Sum(total) energy
	Reactive¹	Accuracy	IEC 62053-24 Class 1
		Measured data	Positive/Negative/Net/Sum(total) energy
	Apparent¹	Accuracy	IEC 61557-12 Class 0.2
Power factor	Power factor
Demand	Current/Power		Demand, Peak demand, Predicted demand^1,4
Power Quality
Current harmonics	Harmonic order		Up to the 31st harmonic
	Measured data		THD, TDD, magnitude of each harmonic¹
Current unbalance²	Current unbalance according to the NEMA standard
	Zero-sequence/negative-sequence current unbalance

1. The data are not displayed on the LCD screen of Accura 2300 and are provided only via communication.
2. The data are available only when performing three-phase measurements. Three-phase measurements can be performed by
installing one Accura 2350-1PSCSH module for each phase. However, in 3P3W mode you can perform three-phase
measurements by installing two Accura 2350-1PSCSH modules for phases A and C.
3. It indicates the measurement accuracy when the measurement error of an external ZCT is zero.
4. The predicted demand is calculated under the assumption that the currently measured value will remain constant for
the remainder of the subinterval within the demand subinterval.

TM-3P/1P Terminal Block

Accura 2300/2350 General Specifications

Model		Description
Three-phase terminal block	TM-3P-105	For use with Accura 2350-3P-250A-105 module
	TM-3P-90	For use with Accura 2350-3P-125A-90 module
	TM-3P-75L	For use with Accura 2350-3P-100A-75 module
	TM-3P-75	For use with Accura 2350-3P-60A-75 module
	TM-3P-105-LB¹	For use with Accura 2350-3P-250A-105 module
	TM-3P-90-LB¹	For use with Accura 2350-3P-125A-90 module
	TM-3P-75L-LB¹	For use with Accura 2350-3P-100A-75 module
	TM-3P-75-LB¹	For use with Accura 2350-3P-60A-75 module
Single-phase terminal block	TM-1P-105	For use with Accura 2350-1P-250A-105 module
	TM-1P-60	For use with Accura 2350-1P-125A-60 module
	TM-1P-50L	For use with Accura 2350-1P-100A-50 module
	TM-1P-50	For use with Accura 2350-1P-60A-50 module
	TM-1P-105-LB¹	For use with Accura 2350-1P-250A-105 module
	TM-1P-60-LB¹	For use with Accura 2350-1P-125A-60 module
	TM-1P-50L-LB¹	For use with Accura 2350-1P-100A-50 module
	TM-1P-50-LB¹	For use with Accura 2350-1P-60A-50 module

Device Type
Model		Weight
Three-phase terminal block	TM-3P-105	339 g
	TM-3P-90	202 g
	TM-3P-75L	183 g
	TM-3P-75	133 g
	TM-3P-105-LB¹	361 g
	TM-3P-90-LB¹	216 g
	TM-3P-75L-LB¹	220 g
	TM-3P-75-LB¹	160 g
Single-phase terminal block	TM-1P-105	246 g
	TM-1P-60	134 g
	TM-1P-50L	121 g
	TM-1P-50	88 g
	TM-1P-105-LB¹	246 g
	TM-1P-60-LB¹	142 g
	TM-1P-50L-LB¹	128 g
	TM-1P-50-LB¹	96 g

Environmental Conditions
Operating temperature	-20 – 70 ℃(-4 – 158 ℉)
Safe operating temperature¹	-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 IP43