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)