Tag: abb_1mrk000005-380_1mrk000614

ABB 1MRK000005-380/1MRK000614 Product Overview In the power system relay protection system,ABB 1MRK000005-380 and 1MRK000614 are a”golden duo”!The former acts like a”signal scout,”specifically collecting current and voltage signals from the power grid,pre-processing them,and transmitting them to the protection device,allowing the system to monitor the power grid’s operating status in real time.The latter acts as the”executive commander,”immediately triggering the protection logic upon receiving a fault signal(such as a short circuit or overload),outputting a trip command to disconnect the faulty line,preventing the fault from escalating,and protecting valuable equipment such as transformers,motors,and switchgear.These two components are core components tailored by ABB for mainstream relay protection devices such as the REF542plus and REF615.Whether for high-voltage line protection in substations or power distribution system protection in factories,they are compatible with the main device without complex debugging when installed in ABB standard protection cabinets.For example,in a 10kV power distribution system of an industrial park,the 1MRK000005-380 collects line current and voltage signals.Once a short-circuit fault occurs,the pre-processed signal is transmitted to the 1MRK000614,which outputs a trip command within 50ms,disconnecting the faulty line.Previously,ordinary protection components took 200ms to activate;now,the fault clearing speed is three times faster,and there have been no further incidents of equipment damage due to fault escalation.More importantly,these two components have extremely strong anti-interference and environmental adaptability!The outdoor cabinets in substations can withstand temperatures as low as-35°C in winter and 65°C in summer,yet the 1MRK000005-380/1MRK000614 still operate stably.Moreover,their isolation voltage reaches 4kV AC,making them unaffected by lightning surges and harmonic interference in the power grid.Previously,a wind farm experienced a lightning strike causing malfunctions in its protection components;after replacing these two components,even during strong lightning strikes,the protection system never triggered false alarms.Whether in traditional substations or renewable energy power plants,this pair of components ensures the safety of the power system!Key Features and Advantages:Accurate Signal Acquisition+Fast Protection Action,Timely Fault Handling

The ABB 1MRK000005-380’s signal acquisition response is less than 2ms,accurately capturing even minute fluctuations in the power grid,including instantaneous current surges;the 1MRK000614’s short-circuit protection response is less than 50ms,twice as fast as the industry average of 100ms.A steel plant’s 10kV high-voltage motor protection system,previously using ordinary components,took 150ms to trip under overload,causing minor damage to the motor windings.After replacing them with this pair of components,overload protection is triggered in 30ms,and the motor has no longer failed due to delayed protection,saving tens of thousands of yuan in motor maintenance costs annually.Wide Temperature Range and Disturbance Resistance,Stable in Harsh Environments Both components can operate within a wide temperature range of-40°C to+70°C and can withstand 4kV AC isolation voltage.They operate stably in both the low-temperature outdoor environments of northern substations and the high-temperature,high-humidity workshops of southern factories.The inverter protection system of a photovoltaic power station frequently experienced inverter room temperatures reaching 68°C in summer.Previously used protection components would frequently malfunction.After replacing them with 1MRK000005-380/1MRK000614,even at temperatures reaching 70°C,the components continued to collect signals and execute protection actions normally.The photovoltaic array’s power generation interruption time decreased from 8 hours per month to 1 hour,and power generation increased by 2%.Multiple protection functions integrated,wide applicability.The ABB 1MRK000614 integrates multiple protection functions including overload,short circuit,phase loss,and overvoltage/undervoltage,handling common grid faults without the need for additional modules.The high-voltage power distribution system of a car factory uses this device to protect three types of equipment:transformers,motors,and lines.It operates according to inverse-time characteristics during overload(the faster the action,the more severe the overload),trips quickly according to time-limited tripping during short circuits,and immediately alarms when a phase is lost.Previously,three separate dedicated protection components were required;now,a single 1MRK000614 suffices,reducing the number of components in the protection cabinet by half and making maintenance significantly easier.It is compatible with ABB systems,offering plug-and-play convenience and saving time.The 1MRK000005-380/1MRK000614 is a”matching”device with ABB REF542plus,REF615,and other protection devices.The interfaces and communication protocols are perfectly compatible.Installed into a dedicated slot,the main device automatically recognizes it,eliminating the need for manual parameter setting and driver installation.A power grid company upgraded the protection systems of 20 substations.When replacing these two components,each substation was debugged in just 4 hours.Previously,replacing third-party components would take two days,which greatly reduced power outage time,increased the amount of electricity transmitted,and created considerable economic benefits.​

The ABB 1MRK000005-380 and 1MRK000614 form a critical relay protection pair designed to ensure the safety and reliability of power systems.The 1MRK000005-380 acts as a high-precision signal acquisition module,collecting current(0-5A)and voltage(0-100V)signals from the grid,preprocessing them into 4-20mA standard signals,and transmitting them to the main protection device—providing real-time visibility into grid operation.The 1MRK000614,meanwhile,functions as a protection control unit,executing logic for overload(inverse time),short-circuit(definite time),phase loss,and over/under voltage protection,and issuing trip commands within 50ms to isolate faulty circuits.​

Both components excel in harsh environments,operating across a-40°C to+70°C temperature range and featuring 4kV AC galvanic isolation to withstand EMI,lightning Surges and harmonic interference—critical for outdoor substations and industrial facilities.Their seamless compatibility with ABB’s REF542plus and REF615 protection devices enables plug-and-play integration,reducing commissioning time and downtime during upgrades.Whether protecting high-voltage transmission lines in substations,industrial motors in factories,or inverters in renewable energy plants,the ABB 1MRK000005-380/1MRK000614 pair delivers the speed,accuracy,and durability needed to prevent equipment damage and ensure uninterrupted power supply.Application Areas:This pair is indispensable for high-voltage line protection in substations!In the 10kV outgoing line protection system of a 220kV substation,the 1MRK000005-380 collects line current and voltage signals.Once a short-circuit fault occurs,the signal is pre-processed and transmitted to the 1MRK000614,which outputs a trip command within 50ms,disconnecting the faulty line.Previously,using ordinary protection components,fault clearing took 200ms,often causing the fault to spread to other lines.After replacing them with these two components,the fault impact range was reduced by 80%,and the substation’s power supply reliability improved to 99.98%.High-voltage motor protection in factories also relies on them!A 2000kW high-voltage motor in a heavy machinery factory uses 1MRK000005-380 to collect the motor stator current signal,and 1MRK000614 to handle overload and phase loss protection.The motor experiences a large current surge during startup;1MRK000005-380 can accurately distinguish between starting current and overload current,preventing false triggering of protection.In the event of a phase loss,1MRK000614 alarms and trips within 30ms,while the previously used protection components took 100ms to activate.After the replacement,the motor has no longer suffered winding burnout due to phase loss,saving over 500,000 yuan in motor maintenance costs annually.These are also indispensable for the protection of new energy power plants!The DC-side protection system for the inverters in a 100MW photovoltaic power plant uses 1MRK000005-380 to collect DC current and voltage signals,and 1MRK000614 to prevent overcurrent and overvoltage damage to the inverters.When the photovoltaic array experiences strong sunlight at midday,the current fluctuates easily.1MRK000005-380 can capture these fluctuations in real time,while 1MRK000614 accurately determines whether to trigger protection based on preset thresholds.Previously used components frequently malfunctioned,causing inverter shutdowns.After replacement,the malfunction rate dropped to 0.1%,and the power plant’s annual power generation increased by 3%.These components are also suitable for high-voltage power distribution protection in data centers!The 10kV power distribution system of a large data center uses 1MRK000005-380/1MRK000614 to protect transformers and distribution cabinets.In the event of a short circuit fault,the faulty line is quickly disconnected to prevent impact on server power supply.Data centers have extremely high requirements for power supply reliability.These two components have a mean time between failures(MTBF)of 100,000 hours,50%higher than the industry average.Since installation,the data center has not experienced any power outages due to protection component failures,ensuring stable business operations.Selection Guide/Purchase Advice:When choosing ABB 1MRK000005-380/1MRK000614,first check the protection device model!They are mainly compatible with ABB REF542plus,REF615,REF610 relay protection devices.If your protection device is from another brand(such as Siemens 7SJ80,Schneider Sepam),you must first confirm the compatibility of the interface and communication protocol.It is best to have the manufacturer conduct compatibility testing to avoid purchasing a device that cannot be installed.Next,consider the power grid parameter requirements!The 1MRK000005-380 supports 0-5A current input and 0-100V voltage input.If your grid current is 0-1A(e.g.,in a low-voltage system),you need to choose the version with a current transformer.The protection settings of the 1MRK000614(e.g.,overload current threshold,short-circuit trip time)can be adjusted according to grid requirements.When selecting,confirm with the manufacturer whether the setting range covers your actual needs to avoid selecting one that cannot be adjusted to the appropriate protection parameters.Also,don’t buy refurbished parts from small workshops!These two components are the core of power system safety.Refurbished parts from small workshops haven’t undergone rigorous ABB testing,resulting in inaccurate signal acquisition,delayed protection actions,and even malfunctions.Using them in substations or factory power distribution systems could lead to equipment burnout,large-scale power outages,and huge losses.Always buy genuine ABB products or ABB-certified refurbished parts.Although they are more expensive,the quality is guaranteed,avoiding major problems later.Finally,installation and commissioning must be done by professionals!Their wiring involves high-voltage signals;incorrect wiring(such as reversed current signals)can cause protection malfunctions.Adjusting the protection settings also requires understanding the characteristics of the power grid;otherwise,settings that are too loose will not provide protection,while settings that are too tight will cause frequent malfunctions.It’s best to have an ABB-certified electrical engineer perform the installation and commissioning.After installation,conduct fault simulation tests to confirm the accuracy of the protection actions before putting it into operation.

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