Relay chạm đất MH REF 052n

Mã: REF052n

Danh mục: Relay bảo vệ

Giá: Liên hệ

Based on digital microprocessor technology, the MH REF 052n is designed as a universal earth fault protective relay, integrating selectable time earth fault characteristic curves. With digital processing of input values, the MH REF 052n offers high measuring accuracy and a wide setting range in fine resolution.

Mechanical Trip Button (MTB):

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FEATURES:

Microprocessor-based with highest accuracy
Mechanical Trip Button (MTB) fault indication system
No requirement for auxiliary power supply for fault indication
Safeguard against automatic reset before fault rectification
Curve selection In accordance with ANSI, IAC, IEC, 1.3/10, Hong Kong Utilities Curve
- Normally Inverse (Nl)
- Very Inverse (VI)
- Extremely Inverse (El)
- Short Time Inverse (STl)
- Moderate Inverse (Ml)
Trip value recording (4-memory)
Date and time stamping for tripping
Integrated surge arrester against transient overvoltages
High set mode is Incorporated for instantaneous protection
Tamper-proof design for settings protection
Serial Interface RS485 for Modbus RTU communication (optional)
Type tested for EMC compliance In acc. with IEC 61000
High immunity to electrical Interference (tested to 2.5GHz)
Type tested In acc. with IEC 60255
Comply to ANSI 86, ANSI 51N/51G, and ANSI 50N/50G

MTB:

Protrude out when relay triggered
Hold on status without power supply
Push back in to reset

TECHNICAL DATA:

Power supply

AC/DC 85 - 265V (other voltages available on request)

Operating frequency

50/60HZ

Earth fault setting

2.0 - 50.0% in step of 0.1%

Time multiplier setting

0.03 - 2.00 in step of 0.01 (IEC, 1.3/10)
0.3 - 20.0 in step of 0.1 (ANSI, IAC)

Definite time delay setting (DTL)

0.03 - 2.00 sec in step of 0.01 sec

Instantaneous Mode (High Set)

2.0 - 10.0 times setting current in step of 0.1

Pick-up current

100 - 115% of the setting current in step of 1%

Reset current value

<90% of the operating value

Working temperature range

-10°C to 55°C

Storage temperature range

-20°C to 65°C

Relative humidity (IEC 60068-2-30)

95% at +40°C

Protection Class (IEC 60529)

IP54 (optional with IP65 front cover)

Overcurrent with stand ability

20A for 3 sec

Power consumption

<6VA

Relay Output

1 x C/0 (Changeover),
1 x N/0 (Normally Open)

Contact Rating

5A at 250VAC

Electrical Life

1 x 10⁵

Mechanical Life

5 x 10⁵

Optional interface

RS485 to Modbus RTU/Slave

LED status indication

Normal operation, fault current detected

Safety feature

Mechanical Trip Button (MTB) complying with ANSI 86

Housing material

ABS resin complying with UL94VO

Net weight

Approx. 390g

COMPLIANCE WITH STANDARDS:

IEC/EN 61000 -4 -2	Electrostatic discharge immunity test
IEC/EN 61000 -4 -3	Radiated, radio-frequency, electromagnetic field immunity test
IEC/EN 61000 -4 -4	Electrical fast transient/ burst immunity test
IEC/EN 61000 -4 -5	Surge immunity test
IEC/EN 61000 -4 -6	Immunity to conducted disturbances, induced by radio -frequency fields
IEC/EN 61000 -4 -8	Power frequency magnetic field immunity test
IEC/EN 61000 -4 -11	Voltage dips, short interruptions and voltage variations immunity tests
IEC/EN 60255 -1	Measuring relay and protection equipment
IEC/EN 60255 -21 -1	Vibration tests
IEC/EN 60255 -21 -2	Shock and bump tests
IEC/EN 60255 -26	Electromagnetic compatibility requirements
IEC/EN 60255 -27	Product safety requirements
CISPR 11 /EN 55011	Electromagnetic compatibility (EMC)