ROOTECH - Energy Solution for Human and Nature

Measurement
Display	Shows real-time measurement data on the LCD screen
	Shows measured values using bar graphs
General	Samples/cycle	Voltage: 512 samples/cycle
		Current: 128 samples/cycle
	Frequency measuring range	42–65 Hz
	True RMS measurement	Voltage/Current: 0.2% Reading
	Residual voltage¹,Residual current²
	Demand, peak demand, predicted demand^3,4
	Maximum/Minimum values
Energy	Received energy, Delivered energy	IEC 62053-22 Class 0.5S
	Net energy (Received energy - Delivered energy)	IEC 62053-22 Class 0.5S
	Total(Sum) energy (Received energy + Delivered energy)	IEC 62053-22 Class 0.5S
Power Quality	Voltage/Current harmonics	Up to the 50th order
	Voltage/Current THD⁵, Current TDD⁶	Up to the 50th order
	Crest factor^4,7,K–factor^4,8	—
	Voltage/Current unbalance⁴	IEC 61000–4–30, NEMA MG1
	Voltage/Current phasor⁴	—
	Voltage/Current waveforms⁴	64 samples/cycle, 2 cycles of waveforms
Event	Detection of fuse fail, phase open, blackout, and over-temperature events
	Maximum number of event logs	50
Temperature	Temperature⁹ of Accura 3300E	Measured with the temperature sensor intergrated into the MCU
Communication	RS–485 Communication	Communicates with the host system using the Modbus RTU protocol
		1,200 / 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 ¹⁰ bps
Power Supply	Power supply voltage¹¹	AC 100 – 240 V 50/60 Hz, DC 100 – 300 V ,CAT Ⅱ

1. The residual voltage is the RMS voltage value obtained by summing three-phase voltages in the time domain.
2. The residual current is three times the zero-sequence current value of fundamental components. When harmonics are
absent, the residual current equals the RMS current obtained by summing three-phase currents in the time domain.
3. The predicted demand is calculated based on thermal demand, and the response speed of thermal demand can be set.
4. The data are not displayed on the LCD screen of Accura 3300E and are provided only via communication.
instantaneously during aggregation intervals. Thus, it allows for accurate trend analysis of voltage,
current and power quality.
5. THD(Total harmonic distortion). Voltage THD:

, CurrentTHD:

6. TDD(Total demand distortion). Current TDD:

Where

can be set to the peak demand current(default) or
the rated current(only via communication).
7. Crest factor:

, 8. K-factor:

9. It is not for fire monitoring, but only for the reference.
10. 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.
11. The device conforms to UL standards for the tested AC power supply voltage.

Voltage Input
Port name	V₁, V₂, V₃, V_N
Connector type	Terminal block¹
Wire specification	0.34 — 2.5 mm² (22 — 14 AWG), cooper
Wire temperature rating	Above 70 °C
Measurement category	III
Impedance	10 MΩ/phase
Burden	0.01 VA/phase @ 220 V
Withstand voltage	AC 3,000 V RMS, 60Hz for 1 minute
Wiring method	3P4W, 3P3W, 1P3W, 1P2W
Current Input
Port name	1S, 2S, 3S (ports on the power supply side), 1L, 2L, 3L (ports on the load side)
Connector type	Terminal block^2,3
Wire specification	2.5 — 6.0 mm² (14 — 10 AWG), cooper
Wire temperature rating	Above 70 °C
Rating	5 A nominal/10 A full scale 3~	Accura 3300E–5A
	1 A nominal/2 A full scale 3~	Accura 3300E–1A
Burden	Max. 0.01 VA/phase @ 10 A
Power Supply
Port name	L+, N-
Connector type	Screw-type terminal (pluggable)⁴
Wire specification	0.25 — 4.0 mm² (24 — 12 AWG), cooper
Wire temperature ratingWire temperature rating	Above 70 °C
Power supply voltage¹	AC 100 –240 V 50/60 Hz, DC 100 –300 V, CAT II
Operating voltage range	0.9 x Us – 1.1 x Us
Withstand voltage	AC 3,000 V RMS, 60Hz for 1 minute
Power consumption	During normal operation	Max. 3 W
	When the device is powered on	Max. inrush current: peak 20 A, Duration: within 1 msec⁶
Measurement
Voltage	Measuring range(Accuracy guaranteed)	AC 35 — 277 V L-N (Line-to-neutral)
		AC 60 — 480 V L-L (for unearthed Delta & Y systems)
	Min. measured value	AC 5 V L-N / AC 9 V L-L
	Accuracy	±0.2 % Reading
	Measurement information	L-N voltage, L-L voltage, fundamental L-N/L-L voltage⁷
		THD, phasor⁷, frequency, residual voltage⁷, harmonics ⁷
		Voltage unbalance ⁷, according to symmetrical components(negative-, zero-sequence components) and the NEMA standard
Current	Measuring range(Accuracy guaranteed)	1 %In — 200 %In⁸	Accura 3300E-5A
		5 %In — 200 %In⁸	Accura 3300E-1A
	Min. measured value	5 mA
	Accuracy	±0.2 % Reading
	Measurement information	Phase current, fundamental current, residual current
		THD, TDD, phasor⁷, harmonics⁷, Crest factor⁷, K-factor⁷
		Current unbalance ⁷, according to symmetrical components(negative-, zero-sequence components) and the NEMA standard
Power	Active, Reactive and Apparent power
PF	Power factor, Power factor angle (Lead/Lag)
Energy	Active	Received, Delivered, Sum(Received + Delivered), Net(Received - Delivered)
	Reactive⁷	Positive, Negative, Sum(Received + Delivered), Net(Received - Delivered)
	Apparent⁷	—
Demand	Current, Active/Reactive/ Apparent power	Demand, Peak demand, Predicted demand⁷
External Communication with the Host System
RS-485 communication	Port name	Ta, Tb
	Connector type	Screw-type terminal (pluggable)
	Protocol	Modbus RTU
	Communication cable	UL 2919 RS-485 1P/2P 24 AWG
	Cable length	Up to 1,219 m (4,000 ft)
	Communication speed	1,200 / 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 bps⁹
	Max. number of connectable modules	32
General
Weight	510 g
Operating temperature	-20 — 70 ℃(-4 — 158 ℉)
Operating environment	Pollution degree 2
Safe operating temperature¹⁰	-20 — 60 ℃(-4 — 149 ℉)
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 IP54 (Accura 3300E)

1. The maximum screw tightening torque of the barrier-type terminal block is 1.1 Nm(12 kgf-cm, 10 lbf-in).
2. The maximum screw tightening torque of the barrier-type terminal block is 1.4 Nm(14 kgf-cm, 12 lbf-in).
3. When connecting wires to the terminal block, use UL-listed lugs.
4. The maximum screw tightening torque of the screw-type terminal block is 0.51 Nm(5.2 kgf-cm, 4.5 lbf-in).
5. The device conforms to UL standards for the tested AC power supply voltage.
6. When installing fuses on the power line, it is recommended to use fuses that are UL-listed with
an RK5 class or higher and are rated at 2 A/500 V. 7. The data are not displayed on the LCD screen of 3300E and are provided only via communication.
8. The rated current In is 5 A/1 A.
9. 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.
10. Compliant with UL 61010-1 (3rd edition)