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GWZC-9890J Fault Islanding Protection Device

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GWZC-9890J Fault Islanding Protection Device

Applicable Scope ：The GWZC-9890J Fault Disconnection Relay provides protection for 10kV-35kV distribution networks, microgrids, and renewable energy systems by detecting and isolating faults (overcurrent, under-voltage, frequency deviations) to prevent cascading failures. Installed in substation switchgear or grid interconnection points, it enables selective fault isolation while maintaining power supply stability.

Product functions（ANSI）：59N | 27 | 59 | 81U | 81O | 78 | 60 | 94

Communication functions :Supported Protocols : IEC 60870-5-103 (over Ethernet) | MODBUS RTU (via RS-485) | IEC 61850 (Ed.2 or Ed.1, as applicable)
Interfaces:2× Ethernet Ports (IEEE 802.3 compliant, 10/100 Mbps) | 2× RS-485 Ports (ANSI/TIA-485-A standard, galvanically isolated)

Other functions : Support time synchronization via communication message, SNTP (Simple Network Time Protocol) time synchronization, and IRIG-B time synchronization. Support the dot matrix printing function with serial port communication. Support the fault recording function

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Product Introduction Technical Parameter Size

Product Introduction :

The GWZC-9890J Fault Disconnection Relay is a specialized protection device designed for 10kV–35kV distribution networks, renewable energy integration points, and microgrid systems, where rapid fault isolation is critical to prevent cascading failures and maintain grid stability. It detects and isolates faults (such as overcurrent, under-voltage, or frequency deviations) while supporting automatic or manual system separation to protect critical loads.

The GWZC-9890J Fault Disconnection Relay Typically installed in distribution substation switchgear cabinets or at tie points between grid sections, this relay ensures selective fault isolation while preserving power supply continuity in unaffected areas.

Product functionsANSI）：

1.Two-stage Zero-sequence Overvoltage Islanding (ANSI 59N)
2.Two-stage Undervoltage Islanding (ANSI 27)
3.Two-stage Bus Overvoltage Islanding (ANSI 59)
4.Two-stage Underfrequency Islanding (ANSI 81U)
5.Two-stage Overfrequency Islanding (ANSI 81O)
6.Out-of-step Islanding (ANSI 78)
7.Potential Transformer Fuse Failure (ANSI 60)
8.External Trip 1/2 (ANSI 94)

Electrical Specifications

Power Supply:

● AC: 85-264V, 47-63Hz (≤15% THD)
● DC: 100-370V (≤5% ripple)

Rated AC Parameters:

● Voltage: 100V/√3 or 100V
● Current: 5A/1A
● Frequency: 50Hz

Overload Capacity:

● Current Circuit: 2×In continuous | 10×In (10s) | 40×In (1s)
● Voltage Circuit: 1.5×Un continuous

Power Consumption:

● Supply: <10W (static), ≤15W (trip)
● Current Circuit: ≤1VA/phase (5A) / ≤0.5VA/phase (1A)
● Voltage Circuit: ≤0.5VA/phase

Digital Output:

● Dry contact (8A@250VAC / 30VDC)
● Dielectric: 4kVAC (coil-contact), 1kVAC (open contact)
● Operating Time: 5ms (typ) / 8ms (max)
● Mechanical Life: 100k operations

Protection Performance

Operating Range:

● Voltage: 0.5-120V (phase)
● Current: 0.02-20×In
● Zero-Seq Current: 0.05-20A
● Frequency: 35-65Hz | Delay: 0-100s

Accuracy:

● Voltage/Current: ±2.5% or ±0.1V/±0.05A (whichever greater)
● Frequency: ±0.01Hz
● Settings: ±2.5%

Trip Time:

● Instantaneous: ≤35ms (≥1.2× setting)
● Time-Delayed: ≤1% of setting or 35ms

Measurement & Monitoring

Range:

● Voltage: 0.5-120V | Current: 0.02-1.2×In

Accuracy:

● V/I: ±0.2% | Frequency: ±0.01Hz | Other: 0.5%
● Time Sync: ≤2ms | SOE: ≤1ms