ALSTOM EP3-E-4-A

Product Brief Introduction

Core Technical Specifications

• Rated Input Voltage: 100V AC / 110V AC three-phase line voltage (power protection version); 110/220V AC jumper-selectable (ESP control version)
• Rated Operating Frequency: 50 Hz fixed
• Power Consumption: < 30 W full-load operation
• Analog Input Channels: 4 channels 0–10V DC, 16-bit high resolution
• Control Output Signals: 4-channel 4–20mA analog output; thyristor SCR gate firing pulse output; rapper mechanical vibration control relay outputs
• Communication Interface: RS485 serial bus, Modbus RTU / Profibus compatible via gateway module
• Physical Dimensions: 340mm × 125mm × 68mm
• Net Weight: 1.20 kg
• Protection Grade: IP20 cabinet-mounted indoor grade
• Operating Ambient Temperature: -10°C ~ +60°C
• Storage Temperature: -30°C ~ +70°C
• Humidity Tolerance: 5%–90% RH non-condensing

Function Features

1. Three-phase synchronous undervoltage fault detection with independent phase judgment logic, instantaneous trip signal output when line voltage drops below calibrated threshold
2. ESP spark rate closed-loop regulation, intermittent energization algorithm to reduce power consumption while maintaining maximum fly ash capture efficiency
3. Full real-time secondary voltage, secondary current and primary current sampling monitoring
4. Built-in hardware watchdog circuit, automatic reset and fault lockout upon processor crash
5. Multi-level user parameter password lock to prevent unauthorized modification of protection threshold values
6. Continuous self-diagnosis of internal power circuit, input signal open/short circuit fault identification

Performance Parameters

• Undervoltage Action Delay Range: 0.1s ~ 99.9s continuously adjustable
• Measurement Accuracy Class: 0.5 for voltage/current sampling
• Maximum Spark Suppression Response Speed: < 10ms
• Isolation Withstand Voltage: 2000V AC between signal circuit and power circuit
• Overvoltage Withstand Capability: 1.5× rated input voltage continuous operation without damage

Material Composition

• Outer Housing: Cold-rolled steel sheet with anti-corrosion matte black electrostatic spraying
• Internal Circuit Board: FR4 high-temperature resistant flame retardant PCB, tin-lead free surface treatment
• Terminal Block: PA66 flame retardant plastic, copper alloy conductive terminals with nickel plating anti-oxidation coating
• Internal Capacitors: High-temperature electrolytic capacitors with 10,000-hour service life at 60°C

Structural Characteristics

• Standard 19-inch rack-mount modular plug-in structure, hot-swappable compatible with ALSTOM EP series backplane
• Front panel equipped with digital parameter display screen, physical setting buttons and fault LED indicator lights
• Rear side fixed screw terminal wiring layout, independent wiring area separated from main circuit board for anti-interference
• Internal segmented shielding compartment, independent shielding layers for power circuit and signal circuit

Working Principle

1. Power Protection Mode: Three-phase line voltage signals pass through isolated voltage transformers, converted to DC sampling signals sent to main processor; processor compares real-time voltage with preset undervoltage threshold, triggers relay trip output when voltage is lower than setting value to cut off load equipment
2. ESP Control Mode: Real-time acquisition of T/R transformer secondary electrical parameters, calculates spark frequency via embedded algorithm, outputs adjustable thyristor firing angle signals to control transformer output voltage; automatic power reduction during frequent sparking to avoid electrode breakdown, and outputs timing signals for ash removal rapper equipment

Advantage Highlights

1. Unified hardware platform supports two major industrial application scenarios (power grid protection / flue gas emission control), reduces spare parts inventory cost
2. Ultra-high anti-electromagnetic interference performance, stable operation under strong harmonic and arc interference environment
3. Long service life industrial grade components, designed for 10-year continuous operation without regular component replacement
4. Complete fault data storage function, retains 500 groups of historical fault records for post-failure analysis
5. Modular plug-in design, single module replacement without system overall shutdown

Applicable Industries

Installation Requirements

1. Mount inside sealed industrial control cabinet, vertical installation angle deviation ≤ 15°, avoid direct air duct blowing on module surface
2. Maintain ≥ 50mm heat dissipation gap above and below the module in the cabinet
3. Separate power wiring and signal wiring into different wiring grooves, wiring distance ≥ 100mm
4. Equip cabinet with temperature control fan when ambient temperature exceeds 45°C
5. Connect cabinet grounding terminal to factory protective earth with 4mm² copper grounding wire

Usage Precautions

1. Do not operate the module outside the specified voltage range, overvoltage will permanently damage internal sampling transformers
2. All parameter modification operations must be recorded and backed up before adjustment
3. Cut off all power supply before opening the module housing for inspection
4. Do not use compressed air to blow dust inside the module, residual moisture will cause circuit short circuit
5. If frequent fault alarms occur, inspect external voltage transformer wiring open circuit first before module maintenance