Product Introduction:

       The GWZC-9611 Line Protection Relay is designed for protection, control, and measurement of transmission lines at voltage levels of 132kV, 66kV, 33kV, and 11kV. It is widely applied in substations, distribution stations, and power plants for the protection and control of incoming feeder cabinets and outgoing feeder cabinets.

Product functions：

1.Instantaneous Overcurrent Protection (ANSI 50)(Trip)

      Voltage-Controlled Instantaneous OC Protection (ANSI 50V ) 

      Directional Blocked Instantaneous OC Protection (ANSI 67 ) 

2.Time – limitedInstantaneous Overcurrent Protection (ANSI 50)  (Trip)

      Voltage-Restrained Time-Delayed Overcurrent Protection (ANSI 51V )

      Directional Definite-Time Overcurrent Protection (ANSI 67 ) 

3.Definite – Time Overcurrent Protection(ANSI 51) (Trip)

      Voltage-Controlled Definite-Time Overcurrent Protection (ANSI 51V ) 

      Directional Definite-Time Overcurrent Protectionn (ANSI 67 ) 

4.Inverse-Time Overcurrent Protection (ANSI 51AC)(Trip)

      Voltage-Restrained Inverse-Time OC Protection (ANSI 51V ) 

      Directional Inverse-Time OC Protection (ANSI 67 ) 

5.Reclosing Acceleration Protection(ANSI: 79+50/67) (Trip)

      Voltage-Controlled Reclosing Acceleration Protection (ANSI:79 + 50V/51V)

      Directional Blocked Reclosing Acceleration Protection(ANSI:79 + 67)

6.Overload Protection（ANSI 49）(Alarm/Trip)

7.InstantaneousZero-Sequence Overcurrent Protection（ANSI: 50N）(Trip)

      Zero-Sequence Under-Voltage Blocked Instantaneous Zero-Sequence Overcurrent Protection(ANSI:50NZ)

      Directional Blocked Instantaneous Zero-Sequence Overcurrent Protection(ANSI: 67N)

8.Time – limitedZero-Sequence Overcurrent Protection (ANSI: 51N) (Trip)

      Zero-Sequence Under-Voltage Blocked Definite-Time Zero-Sequence Overcurrent Protection(ANSI:51NZ)

      Directional Blocked Definite-Time Zero-Sequence Overcurrent Protection (ANSI;67N)

9.Definite-Time Zero-Sequence Overcurrent Protection（ANSI:51N）(Alarm/Trip)

10.Inverse-Time Zero-SequenceOvercurrent Protection （ANSI:51NI） (Trip)

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)