ALSTOM MVAJ53H1LB0856A Overcurrent protection auxiliary relay module
Specific Parameters
Rated Operating Voltage 90-260VAC 47-63Hz, 48-250VDC
Contact Configuration Multiple Changeover Contacts, Special Heavy-duty Protection Contact Combination
Rated Contact Load 5A/250VAC, 5A/125VDC
Operating Time ≤10ms at Rated Voltage
Reset Mode Dual Modes Optional: Manual Reset, Automatic Reset
Dielectric Withstand Voltage 2kVAC/50Hz/1min
Operating Temperature Range -20℃ to +70℃
Storage Temperature Range -40℃ to +85℃
Relative Humidity 5% to 95%, Non-Condensing
Protection Class IP20
Mounting Type Standard DIN Rail Mounting, Panel Opening Fixed Mounting
Mechanical Life ≥100,000 Operations
Product Performance
Action Response Performance: Adopts high-precision dedicated electromagnetic drive structure, with action response time ≤10ms at rated voltage, precise action without jitter and contact bounce, can quickly execute overcurrent fault tripping commands and circuit switching operations, eliminate protection failure caused by command delay, and ensure rapid and safe isolation of power grid and equipment under overcurrent fault conditions, effectively avoiding the expansion of fault scope.
Contact Load Performance: Equipped with exclusive heavy-duty changeover contacts for power overcurrent protection, the contacts are made of high-quality high temperature resistant and arc resistant materials, the rated load capacity adapts to circuit breaker tripping coils and various high-voltage control circuits, no ablation, overheating or poor contact during long-term on-load operation, extremely high on-off stability, and can meet the interlock and fault signal output needs of multiple circuits at the same time.
Power Supply Compatibility Performance: Supports wide-range AC/DC dual-system universal power supply, covering full-spec power supply standards for conventional power and industrial sites, built-in voltage stabilizing filter and voltage fluctuation suppression circuit, power supply voltage fluctuation does not affect the normal action of the module, no additional power supply adapter device required, strong on-site deployment compatibility, suitable for various complex power control scenarios.
Anti-interference Stability Performance: Has excellent anti-electromagnetic interference, anti-surge impact and anti-harmonic interference capabilities, can effectively resist stray signals, high-voltage equipment start-stop interference and line surge impact in power systems, completely eliminate maloperation and refusal to operate; sturdy and durable mechanical structure, no jamming or performance attenuation during long-term continuous operation, excellent operation stability.
Insulation Safety Performance: Complete electrical isolation between coil power supply circuit and contact control circuit, meeting 2kVAC power frequency withstand voltage standard, effectively blocking high and low voltage side signal crosstalk and high voltage breakdown risk, protecting back-end relay protection devices, PLC and control equipment from damage, and comprehensively improving the safe operation level of the overall control circuit.
Environmental Adaptability Performance: Extremely strong wide-temperature environmental adaptability, with operating temperature ranging from -20℃ to +70℃, can operate continuously and stably for a long time in extreme power and industrial environments, dust, vibration and moisture resistant, adapting to harsh working conditions without constant temperature control such as substations, high-voltage power distribution rooms and industrial control rooms, trouble-free operation all-weather.
Installation and Maintenance Performance: Supports two mounting methods: standard DIN rail quick mounting and panel opening fixed mounting, modular compact structure design, standardized wiring interface, simple installation and commissioning process; built-in operation and fault status indicator to visually monitor module working status in real time, module replacement without interrupting system operation, convenient and efficient later maintenance, greatly reducing operation and maintenance costs.
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