GEYA GRV8-SN - User Manual

Function
Monitoring terminals
Output
Min.breaking capacity DC
Switching voltage
Current rating
Rated supply frequency
Measurement error
Measuring range
Dimensions
Weight
Standards
Mechanical life
Electrical life(AC1)
Voltage range(Un)
Operating temperature
Storage temperature
Mounting/DIN rail
Protection degree
Operating position
Overvoltage cathegory
Pollution degree
Time deviation
Temperature coefficient
L1-L2-L3
2×SPDT
8A/AC1
250VAC/24VDC
500mW
Monitoring 3-phase voltage
GRV8-SN
≤1%
≤5%
127-132-138-220-230
-240-254-265(P-N)
127-132-138-220-230
-240-254-265(P-N)
130V-650V
solid wire max.1×2.5or 2×1.5/with sleeve max.1×2.5(AWG 12)
90×36×64mm
109g 100g
EN 60255-1,IEC60947-5-1
1×10
L1-L2-L3-N
70V-400V
45Hz-65Hz
1×10
5
GRV8-SP
220-230-240-380-400
-415-440-460(P-P)
220-230-240-380-400
-415-440-460(P-P)
-20℃ to +55℃（-4℉ to 131℉）
-35℃ to +75℃（-22℉ to 158℉）
Din rail EN/IEC 60715
IP40 for front panel/IP20 terminals
any
-1-
General
■Model and connotation
Technical parameters
Instruction Manual
3-Phase display voltage relay GRV8-S
GEYA ELECTRICAL CO.,LTD
Add:Wenzhou Brige Industrial Zone,Beibaixiang Town,
Yueqing,Zhejiang,China 325603
■Applications
-Control for connection of moving equipment(site equipment,agricultural
equipent,refrigerated trucks).
-Control for protection of persons and equipment against the consequences
of reverse running.
-Normal/emergency power supply switching.
-Protection against the risk of a driving load(phase failure).
■Function Features
-Controls its own supply voltage(True RMS measurement).
-LCD display.
- Measuring frequency range:45Hz-65Hz.
- Voltage measurement accuracy<1%.
- 2-MODULE,DIN rail mounting.
GRV8 Series
GRV8
N:phase to neutral
P:phase to phase
S
LCD display
Rated control supply code:
Wiring Diagram
L1L2
L3
1211
14
~U
2221
24
Short press T/R 0.5s can test relay action.
Operation description
0.5s
11(21)
12(22)
14(24)
11(21)
12(22)
14(24)
NOTE:
Only when the power supply is normal, press the button.
Phase voltage inquiry
Short press to see the value of 3- phase voltage.
21
2224
L1L2 L3
N
~U
GRV8-SP
GRV8-SN
GRV8-SP
GRV8-SN
Auto-reset
Parameter setting range
Asy=
Note:
Uavr=
Umax=Max(U1,U2,U3)
Umin=Min(U1,U2,U3)
Umax-Umin
U1+U2+U3
Uavr
3
×100%
Rate voltage(Un)
220V
GRV8-SN
GRV8-SP
380V
OFF,(Un+1)...350
OFF,(Un+1)...600
80...(Un-1),OFF
150...(Un-1),OFF
0.05%/℃,at=20℃(0.05%℉，at=68℉)
N
Hysteresis
2%
Phase failure value
50% of Un selected
0.4Nm
Tightening torque
Tel:0086-577-62771036
Fax:0086-577-62711079
E-mail:sale@cnyeya.com
Web:www.geya.net

Summary

General Information

Applications

Describes typical uses and applications of the voltage relay.

Function Features

Lists key operational characteristics and capabilities of the relay.

Model and Connotation

Explains the naming convention and structure of the product models.

Technical Parameters

Wiring Diagram

Parameter Setting

Rated Voltage Setting

Defines the range of input voltages the relay can monitor.

Overvoltage Setting

Configures the threshold for detecting overvoltage conditions.

Overvoltage Action Time Setting

Sets the delay before the relay acts on overvoltage detection.

Undervoltage Setting

Configures the threshold for detecting undervoltage conditions.

Undervoltage Action Time Setting

Sets the delay before the relay acts on undervoltage detection.

Phase Sequence Setting

Enables or disables the phase sequence monitoring function.

Voltage Asymmetry Setting

Configures the threshold for detecting voltage imbalance.

Voltage Asymmetry Action Time Setting

Sets the delay before the relay acts on voltage asymmetry.

Start and Reset Time Setting

Configures delays related to relay startup and reset operations.

Automatic Reset Setting

Controls whether the relay automatically resets after a fault.

Functions Diagram

Phase Failure and Phase Sequence Function Diagram

Illustrates how phase failure and sequence faults affect relay operation.

Overvoltage and Undervoltage Function Diagram

Shows the relay's response to overvoltage and undervoltage conditions.

Asymmetry Function Diagram

Depicts the relay's behavior when detecting voltage asymmetry.

Dimensions

Disposal of Electrical Waste

Caution

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The GEYA GRV8-S is a 3-phase display voltage relay designed for monitoring and protecting electrical systems. It serves as a crucial component in various applications, ensuring the safe and reliable operation of equipment.

Function Description

The primary function of the GRV8-S is to monitor 3-phase voltage, providing protection against several common electrical faults. It continuously measures the supply voltage using True RMS measurement, ensuring high accuracy. The device features an LCD display that provides real-time voltage readings and status information, making it easy for users to monitor the system.

The GRV8-S offers comprehensive protection functions, including:

• Overvoltage Protection: It detects when the voltage exceeds a predefined threshold and can trigger a protective action, such as disconnecting the load, to prevent damage to connected equipment.
• Undervoltage Protection: Conversely, it identifies when the voltage drops below a set minimum, which can be critical for sensitive equipment that requires a stable power supply.
• Phase Sequence Protection: This feature is essential for motors and other rotating equipment, ensuring that the phases are in the correct sequence. Incorrect phase sequence can lead to reverse running, causing damage or safety hazards.
• Phase Failure Protection: The relay can detect the loss of one or more phases, which is vital for preventing single-phasing in 3-phase motors, a condition that can lead to severe overheating and failure.
• Asymmetry Protection: It monitors the voltage balance between phases. Significant asymmetry can indicate problems in the power supply or load, potentially leading to inefficient operation or damage.

The device's internal logic processes these measurements and compares them against user-defined thresholds. If a fault condition is detected, the GRV8-S activates its output relays (2×SPDT), which can be used to control contactors, circuit breakers, or alarm systems, thereby isolating the fault or alerting operators.

Usage Features

The GRV8-S is designed for user-friendliness and versatility in various industrial and commercial settings.

• LCD Display: The integrated LCD provides clear, real-time feedback on voltage levels, fault conditions, and parameter settings. This eliminates the need for external measuring devices during setup and troubleshooting.
• Parameter Setting: Users can easily configure various operational parameters directly on the device. A short press of the (T/R) button for 0.5 seconds allows for testing relay action, while a short press of the (MD) button allows for viewing 3-phase voltage values. Pressing the (MD) button for 3 seconds enters the parameter setting interface, where users can adjust:
  • Rated voltage (Un): To match the specific system voltage.
  • Overvoltage setting: The threshold at which overvoltage protection activates.
  • Overvoltage action time setting: The delay before the relay acts on an overvoltage condition.
  • Undervoltage setting: The threshold for undervoltage protection.
  • Undervoltage action time setting: The delay before the relay acts on an undervoltage condition.
  • Phase sequence setting: To enable or disable phase sequence protection.
  • Voltage asymmetry setting: The threshold for voltage asymmetry protection.
  • Voltage asymmetry action time setting: The delay before the relay acts on an asymmetry condition.
  • Start and reset time setting: For controlling the startup and reset behavior.
  • Automatic reset setting: To enable or disable automatic resetting after a fault.
• DIN Rail Mounting: The 2-MODULE design allows for easy installation on a standard DIN rail (EN/IEC 60715), making it compatible with most electrical panels and enclosures.
• Wide Application Range: The GRV8-S is suitable for controlling moving equipment (e.g., site equipment, agricultural equipment, refrigerated trucks), protecting against reverse running, managing normal/emergency power supply switching, and safeguarding against driving load issues like phase failure.
• Self-Supply Voltage Control: The device controls its own supply voltage, simplifying wiring and ensuring reliable operation.
• Frequency Range: It operates effectively within a frequency range of 45Hz-65Hz, accommodating various power systems.
• Output Relays: The two SPDT (Single Pole Double Throw) output relays provide flexibility for controlling different circuits or signaling multiple conditions.
• Intuitive Navigation: Short presses on the setting buttons allow for adding or dropping parameters, while long presses enable quick setting adjustments. The system automatically exits the setting interface if no key is operated for 60 seconds, preventing unintended changes.

Maintenance Features

The GRV8-S is designed for minimal maintenance, focusing on reliability and ease of troubleshooting.

• Diagnostic Display: The LCD display not only shows real-time voltage but also indicates fault conditions (e.g., "FAULT," "U>," "U<," "PHS.SEQ," "PHS.FAILS," "ASY"). This immediate visual feedback helps in quickly diagnosing problems without the need for specialized tools.
• Test Function: The short press (T/R) 0.5s function allows users to test the relay action when the power supply is normal, confirming its operational status.
• Automatic Reset: The configurable automatic reset function can reduce manual intervention after transient fault conditions, improving system uptime.
• Robust Design: The device is built to withstand industrial environments, with an IP40 protection degree for the front panel and IP20 for terminals, ensuring durability against dust and some water ingress.
• Clear Wiring Diagram: The provided wiring diagram simplifies installation and connection, reducing the likelihood of wiring errors that could lead to maintenance issues.
• Environmental Resilience: Designed to operate in a wide temperature range (-20°C to +55°C) and stored in an even broader range (-35°C to +75°C), the GRV8-S is suitable for diverse climatic conditions.
• Compliance: The product is designed to comply with appropriate safety standards, and its installation must be carried out by qualified electricians, ensuring safe and reliable operation and minimizing maintenance due to improper installation.
• Disposal Information: The manual includes clear instructions for the disposal of electrical waste in compliance with WEEE regulations, promoting responsible environmental practices.

GEYA GRV8-SN Specifications

General

Rated Current	5A
Insulation Resistance	≥100MΩ
Mechanical Life	10, 000, 000 operations
Electrical Life	100, 000 operations
Contact	1CO
Time Delay	0.1s - 10s
Mounting	35mm DIN Rail
Contact Form	SPDT
Rated Voltage (Contact)	250VAC
Vibration Resistance	10-55Hz