Product Introduction:
The GWZC-9832 Motor Differential Protection Relay is designed for high and low voltage asynchronous motor protection, providing fast and reliable fault detection.
It features differential current protection to detect internal motor faults (such as phase-to-phase or winding faults), high-set instantaneous tripping for severe faults, and CT supervision to prevent maloperation. Optional thermal overload protection enhances motor safety. Suitable for 6.6kV, 11kV, 400V, and 690V motors, it is commonly installed in motor control centers (MCCs), medium-voltage switchgear panels, and motor starter cabinets within industrial plants, refineries, and power generation facilities.
The GWZC-9832 Motor Differential Protection Relay ensures rapid fault clearance, minimizing motor damage and improving system reliability.
Product functionsANSI）：
1.Instantaneous Differential Protection (ANSI 87H)
2.Percentage Differential Protection (ANSI 87)
3.Instantaneous Overcurrent Protection (ANSI 50)
4.Time-Delayed Overcurrent Protection (ANSI 51)
5.Backup Time-Delayed Overcurrent Protection (ANSI 51)
6.Inverse Time Overcurrent Protection (ANSI 51V)
7.Overload Protection (ANSI 49)
8.Locked Rotor Protection (ANSI 48)
9.Instantaneous Negative Sequence Overcurrent Protection (ANSI 46)
10.Time-Delayed Negative Sequence Overcurrent Protection (ANSI 46)
11.Inverse Time Negative Sequence Overcurrent Protection (ANSI 46V)
12.Residual Overcurrent Protection (ANSI 50N/51N)
13.Thermal Overload Protection (ANSI 49)
14.Extended Starting Time Protection (ANSI 48)
15.Motor Starting Block (ANSI 86)
16.Overvoltage Protection (ANSI 59)
17.Undervoltage Protection (ANSI 27)
18.Residual Overvoltage Protection (ANSI 59N)
19.Overfrequency Protection (ANSI 81O)
20.Underfrequency Protection (ANSI 81U)
21.PT Fuse Failure Detection (ANSI 60FL)
22.PT Voltage Loss Detection (ANSI 60)
23.Control Circuit Supervision (ANSI 74)
24.System Power Loss Detection (ANSI 27/81U)
25.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)
