Reverse Power Protection Relay | Manufacturers ,Price & Technical Specs

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GWZC-9790N Reverse Power Protection Relay

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GWZC-9790N Reverse Power Protection Relay (ANSI 32)

Applicable Scope ：The GWZC-9790N Reverse Power Protection Relay prevents reverse power flow in electrical systems by tripping the circuit upon detection. Used in 6.6kV-33kV systems, it safeguards generators and grid-tied networks with adjustable trip settings. Installed in switchgear panels, it ensures stable operation in power plants and industrial facilities.

Product functions（ANSI）：50 | 51 | 49 | 50N/51N | 32 | 32R | 79 | 59 | 27 | 59N | 74

Communication functions :Supported Protocols : IEC 60870-5-103 (over Ethernet) | MODBUS RTU (via RS-485) | IEC 61850 (Ed.2 or Ed.1, as applicable)
Interfaces:2× Ethernet Ports (IEEE 802.3 compliant, 10/100 Mbps) | 2× RS-485 Ports (ANSI/TIA-485-A standard, galvanically isolated)

Other functions : Support time synchronization via communication message, SNTP (Simple Network Time Protocol) time synchronization, and IRIG-B time synchronization. Support the dot matrix printing function with serial port communication. Support the fault recording function

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Product Introduction Technical Parameter Size

Product Introduction :
The GWZC-9790N Reverse Power Protection Relay is a specialized protection device designed to detect and prevent reverse power flow in electrical systems, ensuring safe and stable operation. It monitors active power direction and trips the circuit breaker if power flows in reverse—such as from a generator back into the grid—preventing equipment damage. With adjustable trip thresholds and time delays,

The GWZC-9790N Reverse Power Protection Relay is commonly installed in switchgear panels or protection relay cabinets near generators, transformers, or tie lines in medium-voltage (6.6kV–33kV) power systems. Ideal for generator protection, grid-tied systems, and industrial power networks, this relay enhances reliability in applications like backup power and renewable energy integration.

Product functionsANSI）：

1.Instantaneous Overcurrent Protection (ANSI 50)
2.Time-delayed Overcurrent Protection (ANSI 51)
3.Backup Time-delayed Overcurrent Protection (ANSI 51)
4.Overload Protection (ANSI 49)
5.Residual Overcurrent Protection (ANSI 50N/51N)
6.Reverse Power Protection (ANSI 32)
7.Power Restoration (ANSI 32R)
8.Automatic Closing on Power-up (ANSI 79)
9.Overvoltage Protection (ANSI 59)
10.Undervoltage Protection (ANSI 27)
11.Residual Overvoltage Protection (ANSI 59N)
12.Control Circuit Supervision (ANSI 74)

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