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):

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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