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

​Event Recording:​​

● 128 protection trips/operations
● 32 self-tests/fault waveforms (COMTRADE)

​Environmental & Mechanical​

​Operating Temp:​​

● Standard: -10°C to +55°C
● Extended: -40°C to +70°C*

​Storage Temp:​​ -40°C to +80°C
​Humidity:​​ 5-90% RH (non-condensing)
​Pressure:​​ 60-110 kPa
​Compliance:​​

● IEC 60255-21 (vibration/shock)
● IEC 61000-6 (EMC)