Product Introduction:
The GWZC-9833 Motor Magnetic Balance Differential Protection Relay is designed for high-voltage motor protection, providing magnetic balance differential protection to detect internal winding faults, along with overcurrent, phase unbalance, and thermal overload protection.
Motor Magnetic Balance Differential Protection Relay is typically installed in motor control centers (MCCs), high-voltage switchgear panels, and motor protection cubicles within industrial plants, power stations, and large pumping systems, ensuring rapid fault isolation and minimizing motor damage. The relay also features fault recording and event logging for enhanced diagnostics and maintenance.
Product functionsANSI）：
1.Magnetic Balance Differential Protection (ANSI 87M)
2.Instantaneous Overcurrent Protection (ANSI 50)
3.Time-Delayed Overcurrent Protection (ANSI 51)
4.Time-Delayed Overcurrent Protection (ANSI 51)
5.Inverse Time Overcurrent Protection (ANSI 51)
6.Overload Protection (ANSI 49)
7.Stall Protection (ANSI 48)
8.Negative Sequence Instantaneous Overcurrent Protection (ANSI 50Q)
9.Negative Sequence Time-Delayed Overcurrent Protection (ANSI 46)
10.Negative Sequence Inverse Time Overcurrent Protection (ANSI 46)
11.Residual Overcurrent Protection (ANSI 50N/51N)
12.Thermal Overload Protection (ANSI 49)
13.Long Starting Time Protection (ANSI 48)
14.Motor Starting Block (ANSI 86)
15.Overvoltage Protection (ANSI 59)
16.Undervoltage Protection (ANSI 27)
17.Residual Overvoltage Protection (ANSI 59N)
18.Overfrequency Protection (ANSI 81O)
19.Underfrequency Protection (ANSI 81U)
20.Potential Transformer Fuse Failure (ANSI 60FL)
21.Potential Transformer Loss of Voltage (ANSI 27)
22.Control Circuit Supervision (ANSI 74)
23.Loss of Mains Protection (ANSI 27/81U)
24.Non-Electrical Protection (ANSI 30)
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)
