Product Introduction:

           The GWZC-9831 Motor Protection Relay is designed for ​industrial asynchronous motors​ operating at ​400V to 10kVvoltage levels, delivering comprehensive ​protection, control, and measurement capabilities. Built on the ​IEC 61850 standard, it integrates core protection functions including thermal overload (ANSI 49), short-circuit (ANSI 50/51), stall protection, and phase unbalance, with support for high-precision electrical parameter monitoring. Equipped with ​dual Ethernet interfaces​ and ​RS-485 communication, it seamlessly integrates into industrial automation systems. Optimized for ​harsh-environment control cabinets​ (incoming/outgoing feeders), it ensures motor security under overload, voltage fluctuations, and fault conditions.

Product functionsANSI）：

1.Three-Step Overcurrent Protection （ANSI 50/51）
2.(Instantaneous Overcurrent Protection) — ANSI 50
3.(Definite-Time Overcurrent Protection) — ANSI 51
4.(Inverse-Time Overcurrent Protection) — ANSI 51
5.Inverse-Time Overcurrent Protection （ANSI 51）
6.Overload Protection （ANSI 49）
7.Locked Rotor Protection （ANSI 48）
8.Negative Sequence Overcurrent Stage I （ANSI 46 (Stage I)）
9.Negative Sequence Inverse-Time Overcurrent Protection （ANSI 46 ）
10.Zero-Sequence Overcurrent Protection （ANSI 51N/50N）
11.Thermal Overload Protection（ANSI 49）
12.Long Start Protection （ANSI 48LR）
13.Motor Starting Block Protection （ANSI 66）
14.Overvoltage Protection （ANSI 59）
15.Undervoltage Protection （ANSI 27）
16.Zero-Sequence Overvoltage Protection （ANSI 59N）
17.Overfrequency Protection （ANSI 81O）
18.Underfrequency Protection （ANSI 81U）
19.VT Fuse Failure Monitor （ANSI 60FL）
20.VT Loss-of-Voltage （ANSI 27X）
21.Control Circuit Supervision （ANSI 74）
22.System Blackout Protection （ANSI 50BF）
23.Non-Electrical Protection （ANSI 38/49T）

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)