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Accura 2550VOL

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Accura 2550VOL

Mixed Power Voltage Measuring Module

Accura 2550VOL measures the voltage of auxiliary power supplies in a mixed power system
and provides the data to connected modules to measure power.

Accura 2550VOL

Mixed Power Voltage Measuring Module

Accura 2550VOL measures the voltage of auxiliary power supplies in a mixed power system and provides the data to connected modules to measure power.

Overview

Features

Specifications

FAQ

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Overview
Features
Specifications
FAQ
Download

Accura 2550VOL

Power Supply
Power supply voltage	Receives power from Accura 2500M via the internal communication cable
Power consumption	380 mW
Voltage Input
Port name	V₁, V₂, V₃, V_N
Connector type	Terminal block¹ (M4/bolt head Ø7)
Wire specifications	0.75 ― 6.0 mm² (18 ― 10 AWG), copper
Wire temp rating	Above 70 °C
Measurement category	Category Ⅲ
Measured frequency range	42 ― 65 Hz
Impedance	10 MΩ/phase
Burden	0.01 VA/phase @AC 220 V
Switch
Rotary switch	Used for module ID setup
Module Connection
Connection to Accura 2500M	Daisy-chain connection between Accura 2550VOL modules and Accura 2500M for communication with Accura 2500M
	Protocol	Internal protocol
	Connector type	RJ45 connector (A2500M: RJ45A, RJ45B)
	Communication cable	Ethernet cable (Maximum length: 10 m)²
Connection to Accura 2550CM[Z]	Connection to Accura 2550CM[Z] modules to measure the power of the power supply lines measured by Accura 2550VOL
	Protocol	Internal protocol
	Connector type	RJ45 connector (A2550VOL: RJ45-1, RJ45-2)
	Communication cable	Ethernet cable (Maximum length: 10 m)²
Voltage Measurement
Wiring method	3P4W, 3P3W, 1P3W, 1P2W
Sampling rate	512 samples/cycle
Measurement cycle(gapless)	Basic measurement	Frame : 0.2 sec (12 cycles @60 Hz, 10 cycles @50 Hz)
Voltage	Measuring range(accuracy guaranteed)	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
	Min. measured value	AC 5 V L-N
	Measurement data	Line-to-neutral voltage, Line-to-line voltage
		Fundamental, harmonics (up to the 50th order³
		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 % Un⁴/Up to 277 V L-N
Frequency	Measuring range	42 ― 65 Hz
Power Quality
Voltage harmonics³,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 according to the NEMA standard
		Zero-sequence unbalance and negative-sequence unbalance
Events
Phase open / fuse fail event	Measured value	RMS data measured at 0.2-second intervals
	Time delay	1 second
Currnet event	Measured value	RMS data measured at 0.2-second intervals
	Detection method	Users can select from either the "Over" or "Under" item.
Leakage current event	Measured value	RMS data measured at 0.2-second intervals
	Detection method	Users can select the "Over" item.

1. The maximum screw tightening torque of the barrier-type terminal block is 1.4 Nm(14 kgf-cm, 12 lbf-in).
2. Ethernet cables used for module connections are not provided. It is recommended to use shielded Ethernet cables such as Cat. 5e 24 AWG FTP cables.
3. Line-to-line voltage harmonics and line-to-neutral voltage harmonics are measured in 3P3W and 3P4W modes,respectively.
4. Un indicates the basic voltage, 277 V.

Environmental Conditions

Item
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
Certifications
UL (certification pending)	UL 61010-1 3rd Edition, IEC 61010-2-030 2nd Edition
CE	EN 55011:2009/A1:2010, EN IEC 61326-1:2021, EN IEC 61326-2-1:2021, EN IEC 61000-3-2:2019/A1:2021, EN 61000-3-3:2013/A2:2021
KC	EN 55011:2009/A1:2010, EN IEC 61326-1:2021, EN IEC 61326-2-1:2021
General
Warranty period	2 years

Functions
Measures the voltage of auxiliary power supplies in a power system consisting of mixed power supplies (up to 9 auxiliary power supplies)
Provides accurate leakage current(RMS and fundamental) measurement data by connecting to the Accura 2550CMZ power/leakage current measuring module, which has a built-in ZCT(Zero-sequence Current Transformer).
Power Consumption
380 mW
Module Connection
Connection to Accura 2500M	Daisy-chain connection between Accura 2550VOL modules and Accura 2500M for communication with Accura 2500M
	Protocol	Internal protocol
	Connector type	RJ45 connector (A2500M: RJ45A, RJ45B)
	Communication cable	Ethernet cable (Maximum length: 10 m) ¹
Connection to Accura 2550VOL	Connection to Accura 2550CM[Z] modules to measure the power of the power supply lines measured by Accura 2550VOL
	Protocol	Internal protocol
	Connector type	RJ45 connector (A2500M: RJ45A, RJ45B)
	Communication cable	Ethernet cable (Maximum length: 10 m)¹