ALSTOM P70035W82V Digital Transformer Differential Protection Relay
- Product Code: P70035W82V
- Availability: In Stock
ALSTOM P70035W82V
Manufacturer: ALSTOM France
Part No: P70035W82V
Product Type: Digital Transformer Differential Protection Relay
Applicable System: Power Substation & ALSTOM MICOM protection platform
1. Product Overview
P70035W82V is ALSTOM MICOM series numerical differential protection device dedicated for main power transformer and generator main protection. Adopts percentage restraint differential algorithm plus 2nd/5th harmonic blocking logic to avoid malfunction caused by transformer inrush current and CT saturation under external short-circuit fault, widely equipped in 110kV/220kV substation, thermal power & petrochemical power plant high-voltage switch cabinet.
2. Core Technical Parameters
• Rated CT Current: 1A /5A configurable
• Restraint Ratio: Adjustable range 20%~50%
• Operating Time: ≤25ms for internal short-circuit failure
• Power Supply: AC/DC 24~250V universal power input
• Communication: RS485 + Ethernet; Modbus RTU, IEC60870-5-103 protocol
• Operating Temp: -25℃ ~ +55℃, Protection Grade: IP54
• Data Storage: 128 time-stamped event logs, 8 groups fault oscillography record
3. Key Functional Features
• 2nd &5th harmonic restraint to block transformer magnetizing inrush tripping
• Anti-CT saturation design, resisting external short-circuit current saturation disturbance
• Built-in self-test & fault diagnosis, front panel LED status indication
• Panel mounted installation, complies with IEC60255 international relay standard
4. Application Fields
• High voltage main transformer protection for 110kV~220kV power substation
• Turbo-generator differential protection of thermal & gas-fired power plant
• Petrochemical enterprise self-owned power station main equipment protection
ALSTOM © P70035W82V Transformer Differential Protection Relay