Macromatic's Voltage Monitor Relays Design Enhancements
In 2015, Macromatic made several design enhancements to our line of Voltage Monitor Relays. Here is an explanation of these changes to aid in the transition:
12-120V Products
 |
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| Obsolete | New |
The following are the differences between the new line vs. the obsolete design:
- Macromatic no longer offers a 24V AC version in any Series
- Macromatic obsoleted the following Series and recommends a replacement Series if you were using one of the obsoleted ones:
| Obsolete Series | Suggested Replacements | Differences |
| VMKP | VAKP | The obsolete VMKP Series had a fixed time delay on drop-out of 0.5 seconds; the VAKP has an adjustable time delay on drop-out of 0.1-10 seconds |
| VAP | VAKP | The obsolete VAP Series had the drop-out voltage trip setting fixed at 95% of the pick-up setting; the VAKP has an adjustable drop-out voltage trip setting of 75-95% of the pick-up setting |
| VWP | VWKP | The obsolete VWP Series had a fixed time delay on drop-out of 0.5 seconds; the VWKP has an adjustable time delay on drop-out of 0.1-10 seconds |
- The pick-up voltage setting knob (VMP & VAKP Series) and over voltage setting knob (VWKP Series) are now marked with the actual full voltage range vs. a MIN-MAX percentage value
- Improved LED status indication
- True RMS Sensing
There were no changes to the following:
- Pin configuration
- Dimensions
- Type & size of knobs
240-480V Products
The VAKPU Over/Under Voltage Relay has been obsoleted and has been replaced with the VAKP240A product. The VWKPU Voltage Band Relay has been obsoleted and replaced with the VWKP240A product. Below is a comparison between the obsolete VAKPU and the new VAKP240A (most comments also apply to the new VWKP240A unit):
In addition, Macromatic is now offering a 480V single-phase voltage monitor relay. Both the new 240V & 480V versions utilize True RMS Sensing for improved reliability.
For more information on the products, click here. Or contact Macromatic technical support at 800-238-7474 or tech-help@macromatic.com.
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