GRV8-4UVS 3 Phase Under Over Voltage Relay
Key attributes
| Brand | Switchgear parts |
| Model NO. | GRV8-4UVS 3 Phase Under Over Voltage Relay |
| Rated frequency | 45Hz-65Hz |
| Series | GRV8 |
Product descriptions from the supplier
The GRV8-4UVS is a state-of-the-art 3 phase under over voltage relay designed to protect industrial and commercial equipment from voltage drops and phase-related issues. Engineered for reliability, this relay monitors all three phases to ensure stable operation of motors, HVAC systems, and other critical loads. Its advanced features and compact design make it an essential component for maintaining system integrity and preventing costly downtime.
Rated Voltage：AC 220V / 380V / 400V
Frequency Range：45Hz – 65Hz
Measurement Accuracy：<1%
Under Voltage Range：Adjustable (e.g., 160V – 210V per phase)*
Trip Delay Time：Adjustable (e.g., 0.1s – 10s)*
Product Highlight：
Comprehensive 3-Phase Monitoring: Tracks voltage levels across all three phases to detect under voltage and phase anomalies.
Customizable Protection: Adjustable under voltage thresholds and trip delays for tailored system protection.
Wide Frequency Range: Operates seamlessly within 45Hz to 65Hz, suitable for global power standards.
Clear Status Display: LED indicators provide instant feedback on relay operation and system health.
Efficient Installation: Compact 36mm width with DIN rail mounting for easy integration into control panels.
| Model | GRV8-4UVS Three Phase Under Voltage Relay |
| Function | Under voltage |
| Monitoring terminials | L1-L2-L3-N |
| Supply terminals | L1-N |
| Rated supply voltage(Un) | 220V/230V/240V |
| Rated supply frequency | 45Hz-65Hz |
| Under voltage threshold | S:70%-95%of Un |
| Trip delay time(Tu) | 0.1s |
| Hysteresis | 5V |
| Measurement error | ≤1% |
| Power on delay time(Td) | Adjustable: 5min-15min |
| Recovery delay time(Tr) | Adjustable: 5min-15min |
| Konb setting accuracy | 10% of scale value |
| Supply indication | green LED |
| Output indication | red LED |
| Output | 1×SPDT |
| Current rating | 10A/AC1 |
| Switching voltage | 250VAC/24VDC |
| Mechanical life | 1*107 |
| Electrical life(AC1) | 1*105 |
| Operating temperature | -20℃ to +55℃（-4℉ to 131℉） |
| Storage temperature | -35℃ to +75℃（-22℉ to 158℉） |
| Mounting/DIN rail | Din rail EN/IEC 60715 |
| Protection degree | IP40 for front panel/IP20 terminals |
| Operating position | any |
| Overvoltage category | III |
| Pollution degree | 2 |
| Max.cable size(mm²） | solid wire max.1*2.5 or 2*1.5/with sleeve max.1*2.5（AWG 12） |
| Tightening torque | 0.8Nm |
| Dimensions | 90×18×64mm |
| Weight | 63g,65g |
| Standards | EN 60255-1,IEC60947-5-1 |
Online store
On-time delivery rate
Response time
100.0%
≤4h
Company overview
Workplace: 1000m²
Total staff:
Highest Annual Export(usD): 300000000
Services
Business Type: Sales
Main Categories: Low Voltage Electrical Apparatus/Instrument meters/Production equipment/Electrical fittings/Equipment Parts
Whole life care manager
Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.
The equipment supplier has passed platform qualification certification and technical evaluation,
ensuring compliance, professionalism, and reliability from the source.
Related Products
-
GRW8-01 02 Temperature Monitoring Relay
-
Digital Timer Switch TS-GE2 Programmable Periodic Timer
-
Digital Timer Switch THC 822 16A Weekly Programmable
-
Digital Timer Switch THC 109-16A Light Dependent Relay ＆accessories
-
Digital Timer Switch THC 109B-16A Light Dependent Relay ＆accessories
-
Digital Timer Switch THC 15A Programmable Periodic Timer
-
Digital Timer Switch THC 20-1C Weekly Programmable
Related Knowledges
-
What Are Combined Transformer Standards? Key Specs & TestsCombined Instrument Transformers: Technical Requirements and Testing Standards Explained with DataA combined instrument transformer integrates a voltage transformer (VT) and a current transformer (CT) into a single unit. Its design and performance are governed by comprehensive standards covering technical specifications, testing procedures, and operational reliability.1. Technical RequirementsRated Voltage:The primary rated voltages include 3kV, 6kV, 10kV, and 35kV, among others. The secondary vEdwiin10/23/2025 -
What Are the Types of Reactors? Key Roles in Power SystemsReactor (Inductor): Definition and TypesA reactor, also known as an inductor, generates a magnetic field within the surrounding space when current flows through a conductor. Therefore, any current-carrying conductor inherently possesses inductance. However, the inductance of a straight conductor is small and produces a weak magnetic field. Practical reactors are constructed by winding the conductor into a solenoid shape, known as an air-core reactor. To further increase inductance, a ferromagnetJames10/23/2025 -
35kV Distribution Line Single-Phase Ground Fault HandlingDistribution Lines: A Key Component of Power SystemsDistribution lines are a major component of power systems. On the same voltage-level busbar, multiple distribution lines (for input or output) are connected, each with numerous branches arranged radially and linked to distribution transformers. After being stepped down to low voltage by these transformers, electricity is supplied to a wide range of end users. In such distribution networks, faults such as phase-to-phase short circuits, overcurreEncyclopedia10/23/2025 -
On-Line Testing for Surge Arresters Below 110kV: Safe and EfficientAn On-Line Testing Method for Surge Arresters at 110kV and BelowIn power systems, surge arresters are critical components that protect equipment from lightning overvoltage. For installations at 110kV and below—such as 35kV or 10kV substations—an on-line testing method effectively avoids the economic losses associated with power outages. The core of this method lies in using online monitoring technology to evaluate arrester performance without interrupting system operation.The test principle is bOliver Watts10/23/2025 -
Why Upgrade to Maintenance-Free Transformer Breathers?Maintenance-Free Moisture Absorption Technology for Oil-Immersed TransformersIn traditional oil-filled transformers, the temperature control system causes thermal expansion and contraction of insulating oil, requiring the sealing gel chamber to absorb significant moisture from the air above the oil surface. The frequency of manual silica gel replacement during patrols directly impacts equipment safety—delayed replacement can easily lead to oil degradation. Maintenance-free moisture absorbers revFelix Spark10/23/2025 -
What Is an MVDC Transformer? Key Applications & Benefits ExplainedMedium-voltage DC (MVDC) transformers have a wide range of applications in modern industry and power systems. The following are some key application areas for MVDC transformers: Power Systems: MVDC transformers are commonly used in high-voltage direct current (HVDC) transmission systems to convert high-voltage AC into medium-voltage DC, enabling efficient long-distance power transmission. They also contribute to grid stability control and power quality improvement. Industrial Applications: In inEdwiin10/23/2025
Haven't found the right supplier yet? Let matching verified suppliers find you.
Get Quotation Now
Send inquiry
Download
Get the IEE Business Application
Use the IEE-Business app to find equipment, obtain solutions, connect with experts, and participate in industry collaboration anytime, anywhere—fully supporting the development of your power projects and business.
