ASD-441H Motor protection relay

Description

Overview

• The  ASD-441H Motor protection relay is primarily designed to protect motors.It is suitable for high-voltage motors in 3 kV to 35 kV systems,
  and serves as bay-level equipment, performing protection, measurement, control, and communication functions.

Product Functions (ANSI)

• Instantaneous Overcurrent Protection 50
• Definite Time Overcurrent & Negative Sequence Overcurrent Protection 51 / 46
• Inverse Time Overcurrent & Inverse Time Negative Sequence Current Protection 51 / 46
• Negative Phase Sequence Voltage Protection 47
• Locked Rotor Protection: Start Locked Rotor & Running Locked Rotor Protection 48
• Thermal Overload Protection 49
• Undervoltage Protection 27
• Overload Protection 51 / 49
• Zero-sequence Overcurrent Protection 50N / 51N
• Overvoltage Protection 59
• Long Start Time Protection / Start Supervision 66
• VT & CT Disconnection Supervision 60
• Control Circuit Break Monitoring 74

Communication Mode

• Optional: RS-485, CAN bus, Ethernet, IEC 60870-5-103 (IEC-103)

Main Functional Specifications

• Protection response time (including the response time of the output relay): Average error in response time: not more than 35 ms;
• Precision operating range: Minimum precision current: 0.08 In, Maximum precision current: 20 In
• Current setting error: When the current exceeds 1.00 A, the error shall not exceed ±2.5%; Voltage setting error: shall not exceed ±3%
• Measurement accuracy: Current (I)/Voltage (U): Class 0.2; Power (P)/Reactive power (Q): Class 0.5
• Remote signal resolution: no more than 2 ms

Event Logging, Fault Recording

• The recorded events include protective action events and device malfunctions;
• Record the type of protection trip, the time of the trip, and the operating parameters at the time of the trip;
• The fault recording data includes: the time of the protection operation, the type of protection operation, and the rms values before and after the recording was initiated;
• Data length of the fault recording: 2 cycles before the fault and 4 cycles after the fault;
• The SOE can retain 48 sets of data after a power loss, and the fault report can retain 16 sets of data after a power loss.

Monitoring Features

• The device is capable of measuring analog quantities such as current, voltage, and frequency;
• Collect position signals from circuit breakers, energy storage systems, isolating switches, and remote/local control switches, as well as other digital signals;
• Control functions of the disconnect switch.

Setting Table

No.	Display Name	Range	Step	Remark
1	Instantaneous Overcurrent Protection Setting
1.1	Instantaneous Overcurrent Enable	1/0	—	Instantaneous overcurrent: Enable(1)/Disable(0)
1.2	Instantaneous Time Delay	0.00～120.00s	0.01s
1.3	Startup Setting Current	0.10～99.99A 0.10～20.00A	0.01A	In=5A In=1A
1.4	Running Setting Current	0.10～99.99A 0.10～20.00A	0.01A	In=5A In=1A
2	Overcurrent Protection Setting
2.1	Overcurrent Protection Enable	1/0	—	Overcurrent protection: Enable(1)/Disable(0)
2.2	Overcurrent Time Delay	0.00～120.00s	0.01s
2.3	Overcurrent Setting Value	0.10～99.99A 0.10～20.00A	0.01A	In=5A In=1A
3	Negative Sequence Overcurrent Setting
3.1	Negative Sequence Overcurrent Enable	1/0	—	Negative sequence overcurrent: Enable(1)/Disable(0)
3.2	Overcurrent Time Delay	0.00～120.00s	0.01s
3.3	Overcurrent Setting Value	0.10～99.99A 0.10～20.00A	0.01A	In=5A In=5A In=1A
4	Inverse Time Overcurrent Setting
4.1	Inverse Time Overcurrent Enable	1/0	—	Inverse time overcurrent: Enable(1)/Disable(0)
4.2	Time Constant	1.00～100.00s	0.01s	Time constant for inverse time overcurrent
4.3	Inverse Time Current I	0.50～10.00A 0.20～2.00A	0.01A	In=5A In=1A
5	Negative Sequence Inverse Time Setting
5.1	Negative Sequence Inverse Time Enable	1/0	—	Negative sequence inverse time: Enable(1)/Disable(0)
5.2	Inverse Time Constant T	1.00～100.00s	0.01s	Time constant for negative sequence inverse time
5.3	Inverse Time Current I	0.10～10.00A 0.20～2.00A	0.01A	In=5A In=1A
6	Negative Phase Sequence Voltage Setting
6.1	Negative Phase Sequence Voltage Enable	1/0	—	Negative phase sequence voltage: Enable(1)/Disable(0)
6.2	Negative Phase Sequence Time Delay	0.10～120.00s	0.01s	Time delay of negative phase sequence voltage protection
7	Long Startup Time Setting
7.1	Long Startup Time Protection	1/0	—	Trip on overtime startup: Enable(1)/Disable(0)
7.2	Startup Time Delay	0.00～120.00s	0.01s	Startup overtime time delay
7.3	Rated Current	1.00～10.00A	0.01A
7.4	Current Threshold	0.20～5.00A	0.01A
8	Start Locked Rotor Setting
8.1	Start Locked Rotor Enable	1/0	—	Start locked rotor protection: Enable(1)/Disable(0)
8.2	Locked Rotor Time Delay	0.00～120.00s	0.01s
8.3	Locked Rotor Setting Current	0.10～99.99A 0.10～20.00A	0.01A	In=5A In=1A
9	Running Locked Rotor Setting
9.1	Running Locked Rotor Enable	1/0	—	Running locked rotor protection: Enable(1)/Disable(0)
9.2	Locked Rotor Time Delay	0.00～120.00s	0.01s
9.3	Locked Rotor Setting Current	0.10～99.99A 0.10～20.00A	0.01A	In=5A In=1A
10	Thermal Protection Setting
10.1	Thermal Protection Enable	1/0	—	Thermal protection: Enable(1)/Disable(0)
10.2	Thermal Time Constant	1.00～100.00s	0.01s	Heating time constant of thermal protection
10.3	Alarm Coefficient	0.10～0.80	0.01
11	Undervoltage Protection Setting
11.1	Undervoltage Protection Enable	1/0	—	Undervoltage protection: Enable(1)/Disable(0)
11.2	Undervoltage Trip Mode	1/0	—	1=Trip, 0=Alarm
11.3	VT Disconnection Block Undervoltage	1/0	—	1=Block, 0=Not block
11.4	Undervoltage Time Delay	0.10～120.00s	0.01s
11.5	Undervoltage Setting Value	5.00～100.00V	0.01V
12	Overload Protection Setting
12.1	Overload Protection Enable	1/0	—	Overload protection: Enable(1)/Disable(0)
12.2	Overload Trip Mode	1/0	—	1=Trip, 0=Alarm
12.3	Overload Time Delay T	0.00～120.00s	0.01s
12.4	Overload Current Setting	0.10～99.99A 0.10～20.00A	0.01A	In=5A In=1A
13	Zero Sequence Overcurrent Setting
13.1	Zero Sequence Overcurrent Enable	1/0	—	Zero sequence overcurrent: Enable(1)/Disable(0)
13.2	Zero Sequence Trip Mode	1/0	—	1=Trip, 0=Alarm
13.3	Zero Sequence Direction Block	1/0	—	Direction block function: Enable(1)/Disable(0)
13.4	Small Current Grounding Line Selection	1/0	—	Line selection: Enable(1)/Disable(0)
13.5	Line Selection Polarity Reverse	1/0	—	1=Reverse polarity, 0=Positive polarity
13.6	Zero Sequence Time Delay	0.00～120.00s	0.01s
13.7	Zero Sequence Current Setting	0.10～5.00A 0.40～99.00A	0.01A	Small current grounding system 380V 3-phase 4-wire grounding system
14	Overvoltage Protection Setting
14.1	Overvoltage Protection Enable	1/0	—	Overvoltage protection: Enable(1)/Disable(0)
14.2	Overvoltage Trip Mode	1/0	—	1=Trip, 0=Alarm
14.3	Overvoltage Time Delay	0.10～120.00s	0.01s
14.4	Overvoltage Setting Value	20.00～120.00V	0.01V
15	Auto-restart Setting
15.1	C10 Auto-restart Function	1/0	—	C10 as auto-restart: Enable(1)/Disable(0)
15.2	Auto-restart Time Delay	0.00～120.00s	0.01s
16	General Setting
16.1	VT Disconnection Alarm	1/0	—	VT disconnection alarm: Enable(1)/Disable(0)
16.2	CT Disconnection Alarm	1/0	—	CT disconnection alarm: Enable(1)/Disable(0)
16.3	CT Disconnection Block Negative Sequence	1/0	—	Block negative sequence on CT fault: Enable(1)/Disable(0)
16.4	Control Circuit Break Alarm	1/0	—	Control circuit break alarm: Enable(1)/Disable(0)
16.5	Current Block Over / Under Voltage	1/0	—	1=Block, 0=Not block
16.6	Device Test Mode	1/0	—	1=Test mode, 0=Normal mode
16.7	3-Phase 4-Wire Voltage Wiring	1/0	—	0=3P3W, 1=3P4W
16.8	Current Input 1A Rated	1/0	—	1=1A input, 0=5A input
16.9	Rated Voltage 380V	1/0	—	1=380V, 0=100V
16.10	B17 Maintenance Plate Function	1/0	—	1=Maintenance plate, 0=Normal remote signal
16.11	Integral Energy Calculation	1/0	—	1=Calculate, 0=Not calculate
16.12	Harmonic Component Calculation	1/0	—	1=Calculate, 0=Not calculate
16.13	Current Block Threshold	1.00～10.00A	0.01A
16.14	Sudden Change Startup Current	1.00～10.00A	0.01A

Outline and Installation Dimensions

   

FAQ

Q：Motor protection relay is primarily designed to protect motors, so how should one choose one?

A:There are many types of motor protection relays, and several principles should be considered when selecting one.

First, motors are classified by voltage rating into low-voltage and high-voltage categories; different voltage ratings require different selection methods.

Second, consider the motor’s capacity; generally, motors with higher capacity have more stringent technical requirements.

Third, refer to the project’s technical specifications.