ABB GFD233A Feeder Protection Relay Installation
Pre-Installation Requirements
-
Environmental Compliance
- Ambient Temperature: -25°C to +70°C (derate 1%/°C >55°C)
- Humidity: ≤95% RH non-condensing
- Pollution Degree: PD2 per IEC 61810-1
-
Safety Clearances
textCopy CodeFront access: ≥200mm
Ventilation gap: ≥25mm above/below module
CT circuit clearance: ≥8mm creepage (reinforced insulation)
Mechanical Installation
Step 1: Panel Mounting
1. Secure to 35mm DIN rail (EN 60715) using retaining clips
2. Torque settings:
• DIN rail latch: 0.7 Nm
• Panel screws: 1.2 Nm (M4 stainless steel)
3. Alignment tolerance: ≤1° deviation from vertical
Step 2: CT/VT Wiring Preparation
| Terminal | Function | Cable Spec | Torque |
|---|---|---|---|
| X1:1-2 | CT Phase L1 (1A/5A) | 2.5mm² twisted pair | 0.5 Nm |
| X1:3-4 | CT Phase L2 | Shielded CY cable | |
| X1:5-6 | VT Primary (100V) | 1.5mm² | 0.4 Nm |
| X1:7-8 | VT Secondary (63.5V) |
CT Critical Note: Short-circuit unused CT inputs with 0.2Ω burden resistor
Electrical Connections
[Power Supply]
- Terminals X2:1 (+) / X2:2 (-)
- Range: 48-250V DC / 100-240V AC
- Fusing: 6A gL/gG (IEC) or Class J (UL)
[Binary I/O]
- Trip Output (X3:1-2): 8A @ 250V AC (NO contact)
- Close Input (X3:5-6): 24V DC wetting voltage
[Communication]
- Ethernet: X4 (RJ45) - CAT6 SF/UTP
- IEC 61850-9-2LE: X5 (LC fiber, 1300nm SMF)
Grounding Requirements:
- Use dedicated 4mm² PE conductor
- Chassis ground point: M5 screw ≤0.1Ω impedance
Commissioning Sequence
Step 3: Initial Power-Up
1. Verify DC polarity with multimeter (+/- 3% tolerance)
2. Apply power → Observe LED sequence:
• Green RUN: Solid = Normal
• Yellow ALARM: 1Hz flash = Configuration needed
3. Check self-test log via front HMI (no "F" errors)
Step 4: Protection Settings
; Minimum recommended settings (50/51 protection)
[Overcurrent]
I>> = 1.2 x CT primary (Instantaneous)
Td = 0.15s @ 3 x I> (Inverse Time)
Curve = EI (IEC 60255-151)
[Earth Fault]
I0> = 0.2 x CT (Definite Time)
T0 = 0.3s
Step 5: Functional Verification
| Test | Method | Pass Criteria |
|---|---|---|
| Trip Circuit | Inject 110% I> via test set | Trip time ≤35ms ±5% |
| COMMS | Send GOOSE msg from REF615 | Latency <4ms |
| Metering Accuracy | Apply 80% Vn, 100% In | ±0.5% class (IEC 60044) |
GFD233A 3BHE022294R0103 ABB PDF
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