VWE Series

VWE048D

May not be exact product – for reference only.

VWE048D

Lead Time: 

10 Days

Function

Voltage Band (Window)

Nominal Voltage

48V DC

output

10A SPDT

Time Delay on Fault

0.1-10 Sec

mount

35mm Din-Rail

Setting Adjustment

Analog

Options

None

Monitored Voltage

27-60V DC

Dropout Voltage Setting

Adjustable % of pick-up voltage setting

Description of Function

When input voltage is present, the green LED is ON. The relay energizes (and the red LED is OFF) when the monitored voltage is between the over and under voltage settings. The relay de-energizes (and the red LED flashes per Flash Code Table) when the monitored voltage falls outside the over or under voltage settings for a period longer than the drop-out time delay (t), which is adjustable between 0.1-10 seconds. The relay re-energizes when the monitored voltage returns to a value between the over and under voltage settings for a period longer than the pick-up time delay, which is fixed at 0.1 seconds.

Function Chart

Product Overview

Features:

• Monitors DC voltages
• Provides voltage band (window) protection
• True RMS voltage measurement ensures more accurate sensing
• Wide range of user-adjustable over voltage and under voltage settings
• Adjustable time delay on drop-out of 0.1-10 seconds
• LED indicates output relay status and fault status

Enclosure Style:

17.5mm
Configuration / Contact Rating:
SPDT 10A @ 250V AC / 8A @ 30V DC
Application Information:
• Voltage Tolerance: ±50% of nominal DC Voltage
• Power Consumption: 3VA maximum
• Voltage Settings:
Pick-up (Umax): Adjustable across full range as shown in the product selection table
Drop-out: Adjustable from 75-95% of pick up setting
• Setting Accuracy:
Maximum Setting (Adjustable): +5%, -0%
Minimum Setting (Adjustable): +0%, -50%
Fixed Voltage Setting: ±2%
• Repeat Accuracy: <1%
• Sensing Accuracy:
Constant Voltage and Temperature: ±2%
Variable Voltage and Temperature: ±5%
• Temperature
Operating: -28°C to 65°C (-18° to 149°F)
Storage: -40°C to 85°C (-40° to 185°F)
• Life:
Mechanical: 10,000,000 operations
Full Load: 100,000 operations
• Response Times:
Pick-up: 0.5 seconds
Drop-out (t): 0.1 – 10 seconds
• Transient Protection: 2000V per IEC 61000-4-5 Level 3 (±2kV)
• Reset: Automatic
Approvals:

Operations

Over/Under Voltage Relays provide protection to equipment where either an over or under voltage condition is potentially damaging. They are designed to operate when the operating voltage reaches a preset value and drop-out when the operating voltage drops to a level below the preset value.

Adjust the pick-up voltage setting (Umax) between the full range as shown on the product nameplate. Then adjust the drop-out voltage setting (Umin) between 75% and 95% of the pick-up setting. The relay energizes (and the LED is Red) when the monitored voltage is above the pick-up setting for a period longer than the fixed pick-up time delay of 0.5 seconds. The relay de-energizes (and the LED is Green) when the monitored voltage is below the drop-out setting for a period longer than the drop-out time delay (t), which is adjustable between 0.1-10 seconds. 

Watch the voltage monitor relay video

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