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Accura 7500

Accura 7500 Digital Protection Relay

Integrated Digital Protection Relay

Accura 7500 is a digital protection relay and high-accuracy power meter
with measurement and relay functions for efficient power control and monitoring.

Accura 7500

Integrated Digital Protection Relay

Accura 7500 is a digital protection relay and high-accuracy power meter with measurement and relay functions for efficient power control and monitoring.

Overview

Features

Specifications

FAQ

Download

Overview
Features
Specifications
FAQ
Download

Voltage Input
PT rating	110V — 770kV/50 — 260V
PT ratio	1 — 7,000/in steps of 0.01
Frequency rating	50/60Hz
Burden	0.04VA/phase @ 260V
Overvoltage withstand capability	Less than AC 260 V(the device keeps operating.) AC 2,000 V(the device can withstand overvoltage for more than 1 minute.)
Wiring mode	Open-delta connection using 3 PTs
Phase Current and Neutral Current Input
CT rating	1 - 50,000A/5A
Burden	0.05VA/phase @ 5V
Overload withstand capability	15 A(the device keeps operating.) 100 A (the device can withstand overload for 2 seconds.)
Zero-sequence Current Input
ZCT rating	200mA/1.5mA
Burden	0.05VA/phase @ 10mA
Overload withstand capability	0.1 A(the device keeps operating.) 10 A (the device can withstand overload for 2 seconds.)
Digital Input
CB state input	1 channel
Digital inputs	10 channels
Wet contact point	DC 70—125V(external power supply)
Insulation
All inputs/outputs	AC 2,500V for 1 minute
Digital Output: CB ON, CB OFF Relay
Contact output type	Form A contact
Contact rating(resistive load)	25A @ AC 240V, 20A @ DC 30V
Contact rating (inductive load cosØ = 0.7)	20A @ AC 250V(inrush 80A)
Contact resistance	Maximum 50 mΩ
Insulation resistance	Minimum 100 MΩ @ DC 500 V
Digital Output: Alarm, Aux. Relay
Contact output type	Form A contact
Contact rating(resistive load)	10A @ AC 125 V, 5 A @ AC 250 V, 5A @ DC 30 V
Maximum switching power	1,250 VA, 150 W
Maximum switching voltage	AC 250 V, DC 110 V(0.3 A)
Contact resistance	Maximum 100 mΩ
Insulation resistance	Minimum 1,000 MΩ @ DC 500 V
Environmental Conditions
Operating temperature	-20 — 70℃(-4 — 158℉)
Storage temperature	-40 — 85℃(-40 — 185℉)
Operating humidity	5% — 95%(non-condensing)
Operating altitude	Up to 2,000 m
Case
Method for taking out the casing	Front draw-out type(automatic CT shorting)
Mounting option	Panel or 19" rack
Weight	4.6kg

Measurements
64 samples/cycle, True RMS measurement
IEC 62053-22 Class 0.5S
Support for 50/60 Hz
Power, Energy, Power factor, Frequency
Energy	Received energy, Delivered energy
	Net energy (Received energy- Delivered energy)
	Sum(total) energy (Received energy + Delivered energy)
Line-to-neutral voltage, Line-to-line voltage, and Current
Fundamental component/True RMS value of current
4-quadrant power
Demand, Peak demand, and Predicted demand
Maximum/ minimum value
Protection Relays
Offers the protection function based on the fundamental frequency components of voltage and current
32 samples/cycle
Provides real-time protection for each sampling cycle
Time resolution for event detection: 1 ms
Event recording
Power Quality
Voltage/current THD
Harmonics analysis¹
K-Factor¹
Communication
RS-485 port (on the back of the device)	Modbus RTU protocol
	Communication speed : 1,200 - 38,400 bps
Power Supply
AC 85 — 265 V, 50/60 Hz
DC 100 — 300 V
Maximum power consumption : 20 W