DEIF RMP-121D Reverse Power Relay

Description

The DEIF RMP-121D is a protective reverse power relay designed to safeguard generators and prime movers from reverse power conditions, which can occur when a generator starts consuming power instead of producing it. This situation can lead to mechanical damage or system instability, making the RMP-121D crucial for marine and land-based generator installations.

🔧 Key Features & Specifications

• Functionality: Detects and protects against reverse power flow to prevent generator motoring.​

• Measurement Configurations:

  • Single-phase (1W)

  • Three-phase, 3-wire (1W3)

  • Three-phase, 4-wire (1W4)​

• Reverse Power Trip Setting: Adjustable from 0 to 25% of nominal power.

• Current Measurement Range: Selectable from 0.3 A to 5.0 A AC.​

• Relay Outputs:

  • Configurable as normally energized or de-energized.

  • Optional latch function to maintain relay state until manually reset

• Power-Up Delay: 200 ms delay to ensure proper initialization upon auxiliary voltage connection.​

• Ride-Through Capability: Maintains operation during momentary power losses up to 200 ms.

• Hysteresis: 2% of full scale to prevent relay chatter during fluctuating conditions.

• Standards Compliance: ANSI code 32 for reverse power protection.​

• Mounting: DIN standard size Q96 for panel integration