---
product_id: 120559803
title: "3 Phase Voltage Monitoring Sequence Relay JVR800-2 Voltage Relay Under Over Voltage Protector"
brand: "ywbl-wh"
price: "KD 18.16"
currency: KWD
in_stock: true
reviews_count: 6
category: "Ywbl Wh"
url: https://www.desertcart.com.kw/products/120559803-3-phase-voltage-monitoring-sequence-relay-jvr800-2-voltage-relay
store_origin: KW
region: Kuwait
---

# 208V AC coil voltage Integrated LCD display 3-phase sequence & imbalance detection 3 Phase Voltage Monitoring Sequence Relay JVR800-2 Voltage Relay Under Over Voltage Protector

**Brand:** ywbl-wh
**Price:** KD 18.16
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay ahead of power faults with smart, seamless 3-phase protection!

## Quick Answers

- **What is this?** 3 Phase Voltage Monitoring Sequence Relay JVR800-2 Voltage Relay Under Over Voltage Protector by ywbl-wh
- **How much does it cost?** KD 18.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/120559803-3-phase-voltage-monitoring-sequence-relay-jvr800-2-voltage-relay)

## Best For

- ywbl-wh enthusiasts

## Why This Product

- Trusted ywbl-wh brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Flexible Control Modes:** Choose manual or automatic reset modules to fit your operational style
- • **Robust Industrial Grade:** Durable silver contacts rated for 6A with secure DIN rail mounting
- • **Real-Time Data at a Glance:** Clear LCD display for instant voltage and status monitoring
- • **All-in-One Voltage Guardian:** Overvoltage, undervoltage, phase loss & sequence protection in a single relay
- • **Plug & Play Power Efficiency:** No external power supply needed—simplify your setup and save energy

## Overview

The JVR800-2 is a compact, DIN rail-mounted 3-phase voltage monitoring relay designed for industrial use. It protects equipment by detecting overvoltage, undervoltage, phase loss, phase sequence errors, and voltage imbalance without requiring an external power source. Featuring an integrated LCD for easy monitoring and optional manual or automatic reset, it supports up to 6 amps with silver contact reliability, making it a smart choice for professional-grade electrical safety.

## Description

3 Phase Voltage Monitoring Sequence Relay JVR800-2 Voltage Relay Under Over Voltage Protector: desertcart.com: Industrial & Scientific

Review: Perfect - A+++++ Perfect
Review: exploded in face - Had a licensed electrician install and it exploded in his face as power was restored to the panel.

## Features

- Function: This voltage relay has overvoltage, undervoltage, phase loss, phase sequence and unbalanced three-phase voltage .
- Practicality: This 3-phase voltage relay does not require an external power supply. Has practical functions: power delay, output test, etc.
- The Composition of This Product: Three-phase voltage protector, chronograph and counter are integrated in one relay.
- 2 rest modules are optional, manual and automatic.
- The LCD can display data for easy reading.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Q5Z1CGM |
| Best Sellers Rank | #399,478 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #65 in Voltage Monitoring Relays |
| Brand | YWBL-WH |
| Coil Voltage | 208 Volts (AC) |
| Connector Type | Screw |
| Contact Current Rating | 6 Amps |
| Contact Material | Silver |
| Contact Type | Changeover, Normally Closed |
| Current Rating | 6 Amps |
| Date First Available | April 2, 2019 |
| Item Weight | 4.6 ounces |
| Item model number | YWBL-WH6ewt8gi2yq |
| Manufacturer | YWBL-WH |
| Maximum Switching Current | 6 Amps |
| Minimum Switching Voltage | 208 Volts |
| Mounting Type | DIN Rail Mount |
| Number of Terminals | 2 |
| Operation Mode | Automatic |
| Specification Met | cUL |
| UPC | 747333418897 |

## Product Details

- **Connector Type:** Screw
- **Contact Material:** Silver
- **Contact Type:** Changeover, Normally Closed
- **Current Rating:** 6 Amps
- **Mounting Type:** DIN Rail Mount

## Images

![3 Phase Voltage Monitoring Sequence Relay JVR800-2 Voltage Relay Under Over Voltage Protector - Image 1](https://m.media-amazon.com/images/I/51E4H+5OCcL.jpg)

## Questions & Answers

**Q: I need the manual in English any help are welcome**
A: I emailed the vendor and he sent me a manual.  I'll be glad to forward to you.  I had an unresolved issue of getting the play unit to read out in english rather than chinese.  The vendor told me they only had the chinese version (despite the photo and having english instructions!).  I ended up using a different product.

**Q: is is suitable to continuously monitor 240V AC power and close relay on power fault? does it suitable for 24/7 work?**
A: Yes but the monitor contact works opposite

**Q: Will this protect against high range overvoltage? That is, can it be set for 200-220 volts and protect against 400-440 being applied?**
A: Rated voltage 208~480VAC,50/60Hz
Protection function Over-voltage, under-voltage, voltage unbalance, wrong phase, phase loss, time counting
Over-voltage adjustment range 200-600V
Under-voltage adjustment range 150-500V

**Q: will it check phase without a load?? I'd like to verify at the box before wiring a compressor.**
A: Right. The phase monitor is measuring voltage .regarding  the load .  Just remember .the phase monitoring is only for voltage .

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect
*by P***H on December 25, 2019*

A+++++ Perfect

### ⭐ exploded in face
*by C***K on July 25, 2023*

Had a licensed electrician install and it exploded in his face as power was restored to the panel.

### ⭐⭐⭐ Fast Shipping, Nice small package But directions are in Chinese!
*by J***S on August 9, 2019*

I hope the display is self explaining because the documentation that came with this is written in Chinese! Very fast shipping through Amazon and a nice small footprint. Going to use this to replace a bad phase loss relay set in a 3 phase rotary screw air compressor.

## Frequently Bought Together

- 3 Phase Voltage Monitoring Sequence Relay JVR800-2 Voltage Relay Under Over Voltage Protector
- YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over-Voltage 50V-300V Under-Voltage 1V-90V AC/DC (AD220)

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**Shop now:** [https://www.desertcart.com.kw/products/120559803-3-phase-voltage-monitoring-sequence-relay-jvr800-2-voltage-relay](https://www.desertcart.com.kw/products/120559803-3-phase-voltage-monitoring-sequence-relay-jvr800-2-voltage-relay)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-02-16*