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)
