Relay bảo vệ

Relay quá dòng MH OA 703

Mã: OA703
Danh mục: Relay bảo vệ

Giá: Liên hệ

The DTL Overcurrent Relay MH OA 703 is designed to monitor the respective phase current of the power system and provides a relay operation in event of an over current situation. The MH OA 703 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:

  • Mechanical Trip Button (MTB) fault indication system
  • No requirement for auxiliary power supply for fault indication
  • Safeguard against automatic reset before fault rectification
  • Trip status indication for individual phases
  • Tamper-proof design for setting protection
  • Type tested for EMC compliance in accordance with IEC 61000
  • High immunity to electrical interference (tested to 2.5GHz)
  • Type tested in accordance with IEC 60255

MTB:

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

TECHNICAL DATA:

Power supply

  • Dual voltage source AC110/240V ± 15% integrated

Operating frequency

  • 50/60HZ

Operating and storage temperature range  

  • Operating -10°c to 55°C
  • Storage and transit -20°C to 65°C  

Relative humidity (IEC 60068-2-30)  

  • 95% at +40°C

Degree of protection (IEC 60529)  

  • IP52  

Voltage withstand (IEC 60255-5)  

  • 2kVrms for 1 min between all case terminals connected together and the case earth terminal
  • 2kVrms for 1 min between independent circuit including contact circuits  

Overcurrent withstand

  • 10 * I rated (for 3 sec)

Power Consumption  

  • Approximately 2VA

Vibration withstand capacity (IEC 60255-2-1)

  • 0.5G between 1 0Hz and 150Hz

Operational life expectancy

  • Electrical: > 1 x 105 operations
  • Mechanical: > 5 x 106 operations

Output contact  

  • AC 250V 5A  

LED status indication

  • Normal operation, fault current detected

Safety feature

  • Mechanical Trip Button (MTB)

Housing material

  • ABS resin complying with UL94VO

Net weight

  • Approx. 500g

COMPLIANCE WITH STANDARDS:

IEC/EN 60755

General rules for residual-current protection devices

IEC/EN 61000 -4 -2

Electrostatic discharge immunity test

IEC/EN 61000 -4 -3

Radiated, radio-frequency, electromagnetic field immunity test (type tested to 2.5GHz)

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 60255 -1

Measuring relay and protection equipment

IEC/EN 60255 -5

Insulation coordination for measuring relays and protection equipment - Requirement and tests

 
ORDERING INFORMATION:
 

Model

Description

OA 703

MTB DTL OC relay

 

 

0848116600