Acrel AM5 Middle Voltage Protection Relay

Acrel AM5 Middle Voltage Protection Relay

● A complete set of protection, related to the application;

● 8 current input, 4 voltage input, 16 DI, 10 DO;

● Auxiliary power supply adapts with AC220V, DC220V, DC110V, AC110V;

● 2 RS485 serial communication, IEC 60870-5-101, IEC60870-5-103 and Modbus-RTU;

● 1 RS232 for user update;

● 1 GPS for GPS timing;

● More than 200 sequence of event records, more than 400 system logs, and more than 10 seconds tripping context records;

● Powerful graphic programmable Logic.

● Line protection Motor protection Capacitor protection Feeder protection

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Acrel AM5 Middle Voltage Protection Relay

General

AM5 series microcomputer protection device integrates protection and control. It is suitable for user terminal substations (substations) with voltage levels of 35kV and below, and can realize comprehensive protection and control of user substations. Application fields cover power, water conservancy, transportation, petroleum, chemical, coal, metallurgy and other industries.

Diagram of AM5 Middle Voltage Protection Relay

Function of AM5 Middle Voltage Protection Relay

Wiring

Front Panel

Dimension

Network

Benefits of AM5 Middle Voltage Protection Relay

• A complete set of protection, related to the application

• 8 current input, 4 voltage input, 16 DI, 10 DO

• Auxiliary power supply adapts with AC220V, DC220V, DC110V, AC110V

• 2 RS485 serial communication, IEC 60870-5-101, IEC60870-5-103 and Modbus-RTU

• 1 RS232 for user update

• 1 GPS for GPS timing

• More than 200 sequence of event records, more than 400 system logs, and more than 10 seconds tripping context records

• Powerful graphic programmable Logic

FAQ of AM5 Middle Voltage Protection Relay

How to set the CT and PT ratio of the protection device?

The protection device can set the CT and PT ratio through the fixed value menu. For example, the current transformer is 75/5 and the voltage transformer is 10/0.1, then the CT ratio is set to 15 and the PT ratio is set to 100.

For AM5, if you want to place a single circuit protection and transformer protection, how to distinguish the model?

AM5-F is suitable for line protection and transformer protection.No need to distinguish between models when placing orders

When the voltage is three-phase three-wire system, does the current have to be connected with 2CT?

The voltage wiring mode and current wiring mode of the protection device can be set independently, and can be connected freely.

How to confirm whether the anti-trip function is configured?

If the circuit breaker is equipped with anti-trip, the device does not must be equipped with anti-trip; if the circuit

breaker does not have anti-trip, you need to configure the AM5-FT anti-trip module. (If DC48V is selected as the

operating power supply, the anti-trip box is not optional, and the circuit breaker must be equipped with anti-trip

function; if you choose AC anti-trip, please note that AC and DC general anti-tripping)

How to purchase suitable protection devices?

Before ordering, it is recommended to consult related engineers, select the appropriate protection model,

and then fill in the corresponding selection table, and place the order after confirmation by the engineers.

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Acrel AM5 Middle Voltage Protection Relay

Function

Function	AM5
Function	-F	-C	-M	-T	-B	-U1	-DB
Input Current	8	8	8	8	6	0	6
Input Voltage	4	4	4	4	6	4	6
Digital	-F	-C	-M	-T	-B	-U1	-DB
Digital Input	16	16	16	16	16	16	16
Digital Output	10	10	10	10	10	10	10
Rear port	-F	-C	-M	-T	-B	-U1	-DB
RS485 (2 ports)	√
USB(1 port)	√
Protocols	-F	-C	-M	-T	-B	-U1	-DB
Modbus Serial	√
IEC 60870-5-103	√
Measurment	-F	-C	-M	-T	-B	-U1	-DB
Electric parameter	U、I、P、Q、PF、Fr、Ep、Eq、Es				U、I、Fr	U、Fr	U、I、Fr
Logs and Records	-F	-C	-M	-T	-B	-U1	-DB
Fault recorder	√
Number of circuit breaker trip and close	√						√
Sequence of event record	√
Monitoring function	-F	-C	-M	-T	-B	-U1	-DB
Trip-and-Close Circuit Supervision	√
Remote control	√
Others	-F	-C	-M	-T	-B	-U1	-DB
GPS	√
Protection Function	-F	-C	-M	-T	-B	-U1	-DB
Overcurrent(3 stages) [ANSI 50/51]	√			√
Directional Overcurrent(3 stages) [ANSI 67]	√
Overcurrent(2 stages) [ANSI 50/51]		√	√		√		√
Earth fault [ANSI 50N/51N]	√	√	√	√
Overcurrent IDMT(Normal inverse,Very inverse,Extremely inverse) [ANSI 51N]	√	√	√	√	√
Overload [ANSI 49F]	√		√	√
Trip and close circuit supervision (alarm)	√	√	√	√	√		√
Under voltage [ANSI 27]			√			√ alarm
Loss voltage [ANSI 27]	√
PT supervision [ANSI 60]	√	√	√	√	√	√	√
Three phase Auto-Reclose [ANSI 79]	√
Under frequency [ANSI 81U]	√
Over frequency [ANSI 81O]	√
Post-accelerated Overcurrent	√				√		√
Overvoltage [ANSI 59]	√	√	√			√ alarm	√ alarm
Protection Function	-F	-C	-M	-T	-B	-U1	-DB
Locked rotor [ANSI 51LR]			√
Unbalance voltage [ANSI 60]		√	√
Unbalance current [ANSI 60]		√	√
Incorrect phase sequence			√
Residual Overvoltage protection [ANSI 59N]	√	√	√			√ alarm
Non-electricity	√	√	√	√
Motor starting time-out [ANSI 48]			√
Directional power [ANSI 32]	√
Thermal overload [ANSI 49M]			√
Positive sequence Overcurrent (2 stages/IDMT) [ANSI 46]			√
BUS tie protection and standby power automatic switch					√		√
Bus charging					√
FC block [ANSI 86]	√	√	√	√
EMC block	√	√	√	√
Intermittent earth fault	√	√
Over haul-lockout [ANSI 86]	√	√	√	√	√	√	√

Note: √ represent with this feature,blank represents without this function.

Technical Parameter

CharacteristicsVersion	AM5
Power Supply
Rated voltage	AC/DC 110V or AC/DC 220V or DC48V
Range	Rated voltage × (1±20%)
Burden	≤10 VA
PT Inputs
Rated value	AC 100V or V
PT rated secondary range	1V～120V
Accuracy	0.5S
Burden	≤0.5VA (each phase)
Voltage withstand	Continuous: 1.2 Un 10s: 2 Un
Phase CT Inputs (Protection Current)
CT rated secondary range	AC 5A or 1A
Dynamic	0.04 ~ 15 × CT rated current
Accuracy	0.5S
Burden	≤0.5VA (each phase)
Thermal withstand	Continuous: 2 In 1s: 40 In
Phase CT Inputs (Measurement Current)
CT rated secondary range	AC 5A or 1A
Dynamic	0.04 ~1.2 × CT rated current
Accuracy	0.5S
Burden	≤0.5VA (each phase)
Thermal withstand	Continuous: 1.5 In 1s: 4 In
Frequency
Rated frequency	50Hz or 60Hz
Frequency range	45 ~ 55Hz or 60Hz
Accuracy	±0.1Hz
Digital Inputs
Operating nominal voltage	AC/DC 110V or AC/DC 220V or DC48V
Digital Inputs
Voltage threshold	70% of nominal voltage
Reset threshold	55% of nominal voltage
Burden	≤ 1W (each phase) (DC220V)
Digital Outputs
Make and carry	≥ 10000 operations
Making capacity	≥ 1000W, L / R = 40ms
Continuous current	≥ 5A
Short duration carry current	≥ 30A for 200ms
Breaking capacity	≥ 30W, L/R = 40ms

Characteristics	Accuracy	Resolution	Disengaging ratio
Voltage	±3%	0.001V	0.95 and 1.05
Current	±3%	0.001A	0.95 and 1.05
Frequency	±0.02Hz	0.001Hz
Operation delay\|t>(DT)	40ms or ±2% setting value	0.001s	-
Operation delay\|t>(IDMT)	40ms or ±5% setting value	0.001s	-

Characteristics	Standard	Level/Class
Radiated emission	IEC-60255-26:2023——5.1	A
Conducted emission	IEC-60255-26:2023——5.2	A
Radiated radio frequency fields	IEC-60255-26:2023	A
Electrostatic discharge	IEC-60255-26:2023——6.1	B
Conducted radio frequency disturbance	IEC-60255-26:2023——6.2-6.5	A
Fast transient bursts	IEC-60255-26:2023——6.2-6.5	B
Slow damped oscillatory waves	IEC-60255-26:2023——6.2-6.4	B
Surges	IEC-60255-26:2023——6.2-6.4	B
Voltage dips and short interruptions test(AC or DC)	IEC-60255-26:2023——6.2	A/C
Magnetic field at power frequency	IEC-60255-26:2023——6.1	B