Mitsubishi Electric FR-A840-18.5K-1 FR-A800 Series Variable Frequency Drive

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Производитель: Mitsubishi Electric
Номер продукта: FR-A840-18.5K-1
Страна происхождения:Соединённые Штаты
Тип продукта: Variable Frequency Drives
Оплата: Т/Т, Western Union
Вес: 16000г
Порт отправления: Сямынь
Гарантия: 12 месяцев

Description

Regulating three-phase induction and permanent magnet synchronous motors in heavy industrial networks is the primary function of the Mitsubishi Electric FR-A840-18.5K-1 variable frequency drive. This high-performance inverter from the elite FR-A800 series delivers an output capacity of 18.5 kW under Normal Duty (ND) conditions, offering superior speed and torque vector control. Operating on a 400V input voltage class, it integrates a specialized FM terminal configuration for high-speed pulse train monitoring. Embedded with standard RS-485, RS-422, and RS-232 serial interfaces, this unit supports smooth automation network integration while maintaining strict compliance with CE, UL, and cUL regulatory requirements.

Features

Advanced Real Sensorless Vector Control and Full Vector Control when paired with encoder feedback.
Built-in FM terminal configured for high-precision pulse train monitor output.
Multiple integrated serial interfaces supporting RS-485, RS-422, and Modbus-RTU protocols as standard.
Dual overload rating capacity: 150% overload for 60 seconds (Normal Duty) and 120% overload for 60 seconds (Light Duty).
Integrated EMC filter reduces high-frequency electrical noise to enhance surrounding system reliability.
Built-in safety-stop function compliant with EN ISO 13849-1 Category 3/PLd and IEC 61508 SIL2 standards.

Applications

Heavy-duty extrusion and compounding systems.
Industrial hoisting, crane long-travel, and overhead gantry systems.
High-capacity positive displacement pumps and centrifugal fans.
Metal wire drawing machines requiring precise tension control.
Automated materials handling conveyors and sorting lines.

Technical Specifications

Specification Parameter	Value / Rating
Manufacturer	Mitsubishi Electric
Model Number	FR-A840-18.5K-1
Applicable Motor Capacity	18.5 kW (Normal Duty) / 22 kW (Light Duty)
Output Rated Current	38 A (Normal Duty)
Output Capacity	29 kVA
Input Rated Voltage / Frequency	Three-phase 380 to 500 V AC, 50/60 Hz
Output Rated Voltage	Three-phase 380 to 500 V AC
Control Monitor Terminal Type	FM terminal (pulse train monitor)
Communication Interface	RS-232 / RS-422 / RS-485
Enclosure Protection Rating	IP20 (Open Type)
Standards / Conformity	CE, UL, cUL, KC, RoHS
Height	400 mm
Width	250 mm
Depth	190 mm
Shipping Weight (Calculated)	16.0 kg

Empirical Engineering Insights

Alternative Models & Compatibility

This unit replaces legacy FR-A740-18.5K models. While physical mounting footprints are highly similar, wiring layouts and the digital keypads differ. Use Mitsubishi's FR Configurator2 software to import existing FR-A700 parameter profiles and convert them directly to FR-A800 compatible formats. Ensure that terminal "FM" (pulse output) configuration is matched, as the alternative "AM" (analog voltage) variant has distinct hardware wiring requirements.

Application Pitfalls & Engineering Notes

The FR-A840-18.5K-1 features dual overload ratings: Normal Duty (ND) and Light Duty (LD). For heavy cyclic applications like escalators or reciprocating compressors, keep parameter settings configured to ND (150% overload capacity). Operating in LD mode (22 kW output) on heavy torque loads will trigger premature E.THT (Inverter Overload) or E.OC1 (Overcurrent during acceleration) trip states. Ensure minimum clearance guidelines (100 mm top and bottom) are strictly maintained inside electrical panels to ensure proper heat sink thermal convection.

Commissioning & Wiring Tips

The FM feedback loop is susceptible to electromagnetic interference (EMI). Run all pulse monitoring cables in dedicated grounded steel conduits or use shielded twisted-pair (STP) lines. Ground the shield exclusively at the drive’s protective earth terminal (PE) and avoid routing control wires parallel to high-power motor cables (U, V, W) to prevent noise induction on the pulse train signals.

Installation Guidelines

CRITICAL WARNING:

Isolate and lock out all AC input power before beginning physical mounting or electrical termination. Wait at least 10 minutes post de-energization to allow internal DC bus link capacitors to fully bleed down. Measure DC voltage across terminals P/+ and N/- using a calibrated digital multimeter to verify the voltage is below 30V DC before starting work.

Mount the VFD vertically on a flat, non-flammable backplate within an IP54 or higher rated control enclosure if ambient dusty or humid conditions exist.

Connect main input lines (R/L1, S/L2, T/L3) to the drive power terminals, observing recommended torque limits. Install an appropriately rated molded case circuit breaker (MCCB) upstream.

Terminate the output terminals (U, V, W) directly to the induction or PM motor. Do not install power factor correction capacitors or surge suppressors on the output lines.

Connect control inputs and the FM monitoring line using shielded cable, then verify parameter Pr. 290 (FM/AM terminal function selection) matches your system configuration.

Key Features:

What is the primary difference between the FM and AM versions of this Mitsubishi drive?

The FM designation indicates that the output terminal is designed for pulse train monitoring output, sending a frequency pulse output proportional to parameters like motor speed or current. The alternative AM designation provides an analog voltage output (0 to 10V DC) instead.

Can this variable frequency drive run a permanent magnet (PM) motor out of the box?

Yes. The FR-A800 series is equipped with control algorithms for both standard induction motors and permanent magnet synchronous motors. Motor auto-tuning must be executed during commissioning to establish correct PM stator resistance and inductance profiles.

Which parameters control the overload rating configuration (Normal vs Light Duty)?

The overload duty selection is configured via parameter Pr. 570 (Multiple rating selection). Setting this parameter changes the drive's output rated current capacity and adjusts the internal thermal overload curve thresholds (ND at 150% overload capacity vs LD at 120% overload capacity).

What should I do if the drive triggers an E.THT fault immediately on startup?

First, verify that the motor nameplate ratings match the drive settings in Pr. 9 (Electronic thermal O/L relay). Then, check mechanical loading for blockages, and confirm whether the duty rating in the drive configuration aligns with the physical application demands.

Глобальная экспресс-доставка

Стандартная доставка: 4-6 рабочих дней через DHL, FedEx и UPS.
Экспресс-отправка: Отправка в тот же день для заказов со склада, сделанных до 14:00 (GMT+8).
Мировое покрытие: Обслуживаем более 150 стран, включая быструю доставку в Саудовскую Аравию и ОАЭ.

Возвраты и гарантия

30-дневная гарантия: Принимаются возвраты товаров со склада в оригинальной, заводской упаковке.
12-месячная гарантия: Каждый промышленный компонент поддерживается нашей профессиональной технической гарантией.

Заказы обрабатываются и доставляются с понедельника по пятницу (кроме государственных праздников).

Для полной информации о праве на возврат, сборах за пополнение запасов и международных возвратах, пожалуйста, ознакомьтесь с нашей официальной Политика возврата и возмещения .

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Mitsubishi Electric FR-A840-18.5K-1 FR-A800 Series Variable Frequency Drive