Relay bảo vệ

Relay chạm đất MH EF 18D

Mã: EF18D
Danh mục: Relay bảo vệ

Giá: Liên hệ

The Earth Fault Relay MH EF 18D is designed to monitor power system and provides a relay operation in the event of an earth fault situation. The MH EF 18D relay incorporates the MTB fault indication system in advanced protection relaying for system abnormalities. This eliminates the need of an auxiliary supply to provide a fault indication, ensuring enhanced safety.

Mechanical Trip Button (MTB):

FEATURES:

  • Earth Fault Current protection
  • Microprocessor controlled DTL operation
  • Backlit high contrast LCD display
  • Modbus-RTU RS485
  • Differentiate of Actual Trip and Test Trip
  • Sealable tamper proof front cover
  • 4 Trip Event Records with Date and Time Stamping
  • Mechanical Trip Button (MTB) comply to ANSI 86. Fault Indication does not require auxiliary supply

MTB:

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

TECHNICAL DATA:

Power supply voltage

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

Earth fault setting

  • 2.0 - 50.0% in step of 0.1%

Delay time setting

  • 0.10 - 2.00 sec in step of 0.01 sec

Power consumption

  • <3.5VA  

Output relay contacts

  • Contact trip - 2 x N/0 (250VAC 5A)

Display type

  • Back lit LCD with Setting & Delay Time Value
  • Instantaneous Fault Current % Value
  • Communication Status, Date & Time Stamping

LED status indicator

  • Red LED for Tripped

Operating temperature

  • 0°C to 60°C

Trip Event recording  

  • 4 event recording with Event Trip Current %, Date and Time Stamping

Operating humidity

  • <95% RH (non-condensing)

Communication

  • Modbus-RTU RS485 upto 384kbps baud rate

Password access PIN

  • 3 Digit numeric password user configurable

Housing material

  • ABS resin complies with UL94VO

Protection class

  • IP 31 (Front)

Unit weight

  • Approx. 185g

COMPLIANCE WITH STANDARDS:

ANSI 86 Lockout Relay

MTB Fault Indication System

IEC 60255-27

Product Safety

IEC 61000-4-2,3,4,5,6,8, 11

(IEC 60255-26)

Electromagnetic Compatibility

IEC 60255-21-1

Vibration, Shock and Bump Test

IEC 60255-21-2

Vibration, Shock and Bump Test

IEC 60068-2-2 (IEC 60255-1)

IEC 60068-2-78 (IEC 60255-1)

IEC 60068-2-30 (IEC 60255-1)

Dry Heat, Damp Heat, Steady State, Cyclic Temperature with Humidity Test

 
ORDERING INFORMATION:
 

Model

Description

EF 18D

Digital Earth Fault Relay

 

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