ALSTOM MVAJ21T1GB0771B Auxiliary trip relay module
Specific Parameters
Rated Operating Voltage 110VDC, 220VDC, 110VAC/220VAC 50/60Hz
Contact Configuration Multiple Changeover Contacts, Heavy-duty Power-special Contact Combination
Rated Contact Load 5A/250VAC, 5A/125VDC
Operating Time ≤12ms at Rated Voltage
Reset Mode Dual Modes Optional: Manual Reset, Automatic Reset
Dielectric Withstand Voltage 2kVAC/50Hz/1min
Operating Temperature Range -20℃ to +60℃
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 electromagnetic drive structure, with action response time ≤12ms at rated voltage, precise action without jitter and contact bounce, can quickly execute tripping commands and signal switching, eliminate protection failure caused by command delay, and ensure rapid and safe isolation of systems and equipment under fault conditions.
Contact Load Performance: Equipped with heavy-duty changeover contacts special for power systems, the contact material is high temperature resistant and arc resistant, the rated load capacity adapts to circuit breaker tripping coils and various control circuits, no ablation and overheating during long-term on-load operation, high on-off reliability, and can meet the multi-circuit interlock control requirements at the same time.
Power Supply Compatibility Performance: Supports AC/DC dual-system universal power supply, wide voltage adapts to different on-site power supply conditions, built-in voltage stabilizing filter circuit, power supply fluctuation does not affect the normal action of the module, no additional adapter device required, strong on-site deployment compatibility.
Anti-interference Stability Performance: Has excellent anti-electromagnetic interference, anti-surge impact and anti-harmonic interference capabilities, can resist stray signals and equipment start-stop interference in power systems, eliminate maloperation and refusal to operate, sturdy and durable mechanical structure, no jamming and performance attenuation during long-term operation.
Insulation Safety Performance: Complete electrical isolation between coil circuit and contact 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 and control equipment from damage, improving the safety level of the overall control circuit.
Environmental Adaptability Performance: Extremely strong wide-temperature environmental adaptability, can operate continuously for a long time in extreme power and industrial environments from -20℃ to +60℃, dust and vibration resistant, adapting to harsh working conditions without constant temperature control such as substations, power distribution rooms and industrial control rooms, stable and trouble-free operation all-weather.
Installation and Maintenance Performance: Supports two mounting methods: DIN rail quick mounting and panel fixed mounting, modular compact structure, standardized wiring interface, simple installation and commissioning process, built-in operation and fault status indicator to visually monitor working status, module replacement without interrupting system operation, convenient and efficient later maintenance.
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