Overview
The 4914091 is the high-power sibling of the 4914090, a Cummins EFC-series electronic speed governor with built-in soft-start for Normally Closed gensets in the 350 kW–1000 kW range. The ramp-up time is adjustable from 0 to 30 seconds to eliminate black-smoke emissions on crank.
Key Features
- Soft-Start with 3500–9500Hz MPU — Optimized speed input range for Cummins N14, K19, and QSK series mid-to-large bore engines
- Normally Closed Output — Actuator defaults to minimum fuel on signal loss, providing inherent engine shutdown safety
- Overspeed Protection — Configurable 1500–7500Hz threshold with immediate fuel cutoff relay activation
- Fast Transient Response — Recovers engine speed within 100ms after load changes for stable generator frequency output
- 12/24V Auto-Sensing — Universal voltage compatibility eliminates need for separate 12V and 24V governor part numbers
- OEM Drop-In — Pin-compatible replacement for Cummins 4914091 EFC governor with identical connector and mounting
Technical Specifications
| Parameter | Value |
|---|---|
| ———– | ——- |
| Model | 4914091 |
| Type | Electronic Speed Governor (EFC, Soft-Start, NC, High-Power) |
| Speed Stability | ±0.25% |
| Speed Sensor Input | 1–6.5 kHz (2–120 V RMS) |
| Actuator Output | Max 1 A |
| Soft-Start Range | 0–30 s adjustable |
| Control Mode | Droop adjustable |
| Application | Cummins 350kW–1000kW Normally Closed genset |
Compatibility
Compatible with Cummins KTA19, KTA38, KTA50 series 350 kW–1000 kW gensets using Normally Closed EFC actuators.
Why Choose ZenixPower
- High-Power NC — Designed for 350kW–1000kW gensets
- Configurable Ramp Time — 0–30 s soft-start for clean crank
- Reverse Polarity Protected — Survives accidental battery reversal
Competitors GAC ESD5330 — large engine specialist | GAC S6700E — advanced paralleling | KUTAI EG3000 — universal
Specification Comparison
| Parameter | 4914091 | GAC ESD5330 | GAC S6700E | KUTAI EG3000 |
|---|---|---|---|---|
| Brand | Cummins (USA) | GAC (USA) | GAC (USA) | KUTAI (Taiwan) |
| Function | Electronic Speed Governor (EFC, Soft-Start, NC, High-Power) | Large Engine Electronic | Advanced + Paralleling | Universal Closed-Loop |
| DC Supply | — | 24V DC | 24V DC | 12/24V DC |
| Actuator Output | Max 1 A | 10A continuous | 2.5–10A | 0.5–15A |
| Speed Stability | ±0.25% | ±0.25% | ±0.25% | ±0.5% |
| Overspeed Protection | Built-in | Built-in (1.5s) | Built-in (1.5s) | Optional |
| Paralleling | No | Optional | Built-in load sharing | No |
| Self-Diagnostics | No | No | Built-in | No |
| Price | Contact Us | $350–550 | $500–800 | $180–300 |
