Description
The GE DFP100 is a digital feeder protection, control, metering, and monitoring relay designed for distribution feeder applications. GE Vernova classifies the DFP100 as a legacy product with manufacturing discontinued. The relay combines feeder protection functions, metering, event recording, waveform capture, communications, and optional automatic reclosing in one assembly.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | GE / General Electric |
| Model | DFP100 |
| Product Type | Digital Feeder Protection Relay |
| Primary Application | Distribution feeder protection and control |
| Typical Applications | Primary feeder protection; backup bus and transformer line protection |
| Rated Frequency | 50 / 60 Hz |
| Rated Voltage | 120 VAC phase-to-phase |
| Rated Current | 1 A or 5 A CT secondary, depending on configuration |
| Control Power Options | 19–60 VDC or 88–300 VDC/AC |
| Protection Functions | Low/high-set overcurrent, directional overcurrent, under/overvoltage, under/overfrequency, negative-sequence overcurrent, breaker failure |
| Reclosing | Four-shot recloser option |
| Protection Settings Groups | 6 |
| Cold Load Pickup | Supported |
| Metering | A, V, W, var, Hz |
| Demand Metering | Demand ammeter |
| Event Recording | Up to 200 events |
| Waveform Capture | Current and voltage waveform recording |
| Waveform Storage | 6 cycles per capture; 2 prefault + 32 postfault samples/cycles configuration is documented in the instruction material |
| Sampling Rate | 16 samples/cycle |
| Local Interface | Optional 20-key keypad and 2 × 16-character display |
| Communications | RS-232; optional RS-485 and fiber-optic interfaces |
| Inputs / Outputs | Configurable digital inputs and relay outputs |
| Operating Temperature | −40 to +70 °C |
| Storage Temperature | −40 to +85 °C |
| Humidity | Up to 95% non-condensing |
| Net Weight | Approx. 10.5 lb (4.76 kg) |
| Shipping Weight | Approx. 12.5 lb (5.67 kg) |
| Lifecycle | Discontinued / Legacy |
The electrical ratings and environmental/weight data above are from GE instruction material GEK-105545; functional descriptions are also supported by GE Vernova’s current legacy-product page.
GE DFP100
Product Overview
The DFP100 Digital Feeder Protection Relay is a microprocessor-based protection and control device for distribution feeders. GE describes it as integrating protection, control, metering, monitoring, and local/remote human interfaces into a single assembly.
The relay uses sampled feeder current and voltage waveforms to implement protection algorithms. Its documented functions include phase and ground overcurrent, directional overcurrent, undervoltage, overvoltage, underfrequency, overfrequency, negative-sequence protection, breaker failure, and cold-load pickup. A four-shot reclosing function is available as an option.
Protection and Monitoring Functions
The DFP100 provides a combination of protection and feeder-monitoring capabilities:
| Function | DFP100 Capability |
|---|---|
| Phase overcurrent | Supported |
| Ground / residual overcurrent | Supported |
| Directional overcurrent | Supported |
| Negative-sequence overcurrent | Supported |
| Undervoltage | Supported |
| Overvoltage | Supported |
| Underfrequency | Supported |
| Overfrequency | Supported |
| Breaker failure | Supported |
| Cold load pickup | Supported |
| Automatic reclosing | Optional four-shot recloser |
| Current/voltage metering | Supported |
| Power / reactive-power metering | Supported |
| Fault/event recording | Supported |
| Oscillography | Supported |
GE’s relay-selection documentation specifically lists the as a multifunction microprocessor-based relay covering 27, 46, 51, 51N, 59, and 81L/H protection functions.
Electrical Configuration
The model name alone does not establish the exact CT and control-power configuration of a particular relay.
GE’s instruction book documents two current-input ratings:
- 1 A CT secondary
- 5 A CT secondary
It also documents two control-power ranges:
- 19–60 VDC
- 88–300 VDC or AC
Therefore, the actual nameplate should be checked before specifying a replacement.
A typical historical GE nameplate example in the instruction material shows:
In: 5 AMP / Vn: 120 VAC / Vps: 125 VDC
but this is an example configuration and should not be assumed to describe every unit.
Communications
The supports communications for local and remote access. GE documentation identifies:
- Front RS-232
- Rear RS-232
- Optional RS-485
- Optional glass-fiber or plastic-fiber optic communications
- ASCII and GE M-Link communication protocols
An optional local MMI consists of a 20-key keypad with a 2 × 16-character display.
Waveform and Event Recording
The relay provides event and waveform recording useful for feeder fault analysis. GE’s legacy product description specifies 200-event recording and waveform capture for current and voltage. The instruction material specifies 16 samples per cycle and records six cycles in the documented oscillography configuration.
Replacement Considerations
For replacement procurement, the exact installed configuration should be matched rather than ordering only by the generic designation.
| Verification Item | Why It Matters |
|---|---|
| Full model/nameplate | Confirms the actual hardware configuration |
| CT rating: 1 A or 5 A | Must match the connected CT secondary |
| Voltage rating | Confirms the VT/PT input configuration |
| Control-power range | Ensures compatibility with the station DC/AC supply |
| MMI option | Determines local keypad/display availability |
| RS-485 / fiber options | Important for SCADA communications |
| Recloser option | Required where automatic reclosing is part of the scheme |
| Firmware/configuration | Relevant to settings and system behavior |
| Serial number / hardware revision | Important for legacy replacement sourcing |
GE’s servicing documentation also states that when replacing internal boards, technicians should use boards with identical part numbers and group numbers, because otherwise calibration problems or incorrect operation may occur.
Lifecycle Status
GE Vernova currently lists the Digital Feeder Relay as a legacy product and states that manufacturing has been discontinued.
For installations still operating relays, the practical replacement market is therefore centered on remaining new-old-stock, surplus, refurbished, and repair inventory. Exact configuration matching is important because the platform has multiple hardware and communications options.
FAQ
The is a digital feeder protection relay combining feeder protection, control, metering, monitoring, communications, and optional automatic reclosing.
What current inputs are available?
The is documented with 1 A or 5 A CT secondary ratings.
What control power does it support?
Two documented ranges are 19–60 VDC and 88–300 VDC or AC.
Does the support automatic reclosing?
Yes. GE documents a four-shot recloser as an optional function.
Does it record faults?
Yes. GE documents 200-event recording and current/voltage waveform capture.
Is the GE still manufactured?
No. GE Vernova currently identifies it as a legacy product with manufacturing discontinued.
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GE Digital Feeder Protection Relay | Feeder Protection & Control
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GE Digital Feeder Protection Relay for distribution feeder protection, control, metering and monitoring. Supports 1 A/5 A CT inputs, directional protection, event recording and optional reclosing.
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