Littelfuse SELCO
The Littelfuse SELCO T2000 Reverse Power Relay is a protective relay designed to detect reverse power flow in generators and electrical power systems. It helps prevent generator motoring and protects prime movers by continuously monitoring power direction and tripping when reverse power exceeds preset limits. The T2000 is widely used in marine, industrial, and power generation applications to ensure safe and reliable generator operation.
BRAND
Littelfuse SELCO
TYPE
Reverse Power Relay
PART NO.
Littelfuse SELCO Reverse Power Relay T2000.0020
MODEL
T2000
Full Technical Specifications ▶
| Parameter | Value / Description |
|---|---|
| BRAND | Littelfuse SELCO |
| TYPE | Reverse Power Relay |
| PART NO. | Littelfuse SELCO Reverse Power Relay T2000.0020 |
| MODEL | T2000 |
| Application | Generator reverse power protection for diesel generators, marine generators, synchronous generators and power management systems |
| Protection Function | Prevents generator from operating as a motor during parallel operation |
| Measurement Principle | Active Power Measurement (−I × Cos φ) |
| Supply Voltage | 450 VAC (Terminals 1–3) / 400 VAC (Terminals 2–3) |
| Current Input (CT) | 5 A AC (External Current Transformer, Terminals 5–6) |
| Trip Level Adjustment | 2–20% of In |
| Trip Delay Adjustment | 2–20 Seconds |
| Operating Frequency | 45–400 Hz |
| Maximum Supply Voltage | 660 VAC |
| Supply Voltage Tolerance | 50–110% of rated voltage |
| Power Consumption | Approx. 5 VA (Voltage Input) |
| Current Consumption | Approx. 0.3 VA (CT Input) |
| Continuous Current | 2 × In |
| Output Relay | Latching Relay, Normally De-energized, Resettable |
| Relay Contact Rating | AC: 400 VAC, 5 A, 1250 VA; DC: 150 VDC, 5 A, 120 W |
| Accuracy | ±5% |
| Repeatability | ±1% |
| Operating Temperature | −20°C to +70°C |
| Dielectric Test Voltage | 2500 VAC / 50 Hz |
| Indicators | Green Power LED, Red Pick-Up LED, Red Trip LED |
| Reset Function | External Reset Input (Terminals 13–14) |
| Mounting | DIN Rail or Screw Mount |
| Housing Material | Flame-retardant Polycarbonate |
| Dimensions | 100 × 115 × 70 mm |
| Weight | Approx. 0.5 kg |
| Marine Certification | Certified by major marine classification societies |
| Standards | CE Marked |
| IEC | IEC compatible marine generator protection relay |
| MADE IN | Denmark |
| REF NO. | 1183 |
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